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Showing papers on "Sodium sulfide published in 2007"


Journal ArticleDOI
TL;DR: In this article, a large-scale bismuth sulfide (Bi 2 S 3 ) nanorods with uniform size have been prepared by hydrothermal method using bistuth chloride and sodium sulfide as raw materials at 180°C and pH = 1-2 for 12h.

63 citations


Journal ArticleDOI
TL;DR: In this paper, a simple and inexpensive successive ionic layer adsorption and reaction (SILAR) method using manganese sulfide thin films was used to deposit a glass substrate, and the as-deposited film was amorphous.

55 citations


Journal ArticleDOI
TL;DR: In this paper, a one-pot, rapid and general method for the synthesis of symmetrical disulfides based on reaction of sulfur with sodium sulfide in the presence of didecyldimethylammonium bromide (DDAB) as a phase transfer catalyst is reported.

42 citations


Journal ArticleDOI
TL;DR: In this article, a non-TOP-based route for the synthesis of core-shell CdSe/CdS quantum dots (QDs) is developed for the first time.

35 citations


Journal ArticleDOI
TL;DR: The EPPG electrode has been clearly shown to be the substrate of choice for the direct electrochemical detection of sulfide and was applied to the recovery of a sulfide spike in river water, with a recovery of 104%.
Abstract: The direct electrochemical oxidation of sodium sulfide has been examined at five different carbon-based electrode substrates (glassy carbon (GC), boron-doped diamond (BDD), edge-plane pyrollytic graphite (EPPG), basal-plane pyrollytic graphite (BPPG) and carbon nanotubes (CNT)). An electrocatalytic response is observed at both the EPPG and CNT electrode compared to that of the other three substrates. The higher capacitative charging currents obtained at the CNT electrode hinder its detection range and, as such, the EPPG electrode has been clearly shown to be the substrate of choice for the direct electrochemical detection of sulfide. The procedure was applied to the recovery of a sulfide spike in river water, with a recovery of 104%.

26 citations


Journal ArticleDOI
TL;DR: In this paper, the phase transfer catalysis (PTC) reactions are conducted under milder conditions, using less-expensive solvents at much faster reaction rates and improved selectivities to desired products.
Abstract: Reactions in three immiscible liquid phases are attractive, and one of the phases can be the locale of the reaction, which will have a dramatic effect on the product distribution in complex reactions. Thus, converting a bi-liquid (L-L) system into tri-liquid (L-L-L) phases is of considerable scientific and commercial interest. Such systems encounter mass-transfer resistances for transfer across two interfaces and the kinetic analysis becomes difficult. In the case of phase transfer catalysis (PTC), a majority of preparatory and industrial reactions are conducted in two phases. The L-L PTC reactions are conducted under milder conditions, using less-expensive solvents at much faster reaction rates and improved selectivities to desired products. However, the phase transfer catalyst is not recovered but treated as waste, because the quantities are very small and do not contribute much to the expensive product. L-L PTC can be elegantly modified to convert it to L-L-L PTC, to recover and reuse the catalyst and also to enhance selectivity, thereby improving profitability and environmental benefits. 3,4-Dimethyl aniline is a useful starting material for the production of riboflavin (vitamin B2) and also is used as a precursor for many drugs. It can be produced via the reduction of 4-nitro-o-xylene in toluene with aqueous sodium sulfide, using tetrabutylammonium bromide (TBAB) as a catalyst under L-L-L PTC at 80 °C. Comparison between tri- and bi-liquid phases was also conducted, and it was observed that, under L-L-L conditions, the rates of reaction of the formation of 3,4-dimethyl aniline had been dramatically enhanced. The kinetics and mechanism of complex L-L-L PTC processes have been explored in detail. The yield, based on the initial amount of reactant, was >95%, and the selectivity was 100%.

23 citations


Journal ArticleDOI
TL;DR: The first total synthesis and structural determination of (+)-BE-52440A have been achieved by enantiodivergent synthesis as mentioned in this paper, and the structure of the structure was determined to be the kalafungin type pyranonaphthoquinone.

23 citations


Journal ArticleDOI
TL;DR: In this paper, the results indicate that pyrrhotite used during leaching can effectively facilitate the leaching out of manganese, cobalt and nickel, and the final maximum recovery rates for manganese, Co and Ni are 85, 75% and 78% respectively.

23 citations


Journal ArticleDOI
TL;DR: The supercritical CO2 microemulsion method represents a simple approach to use a density-tunable solvent for synthesizing size-controlled semiconductor nanoparticles over a broad range of values.
Abstract: The size and size dispersion of cadmium sulfide and zinc sulfide semiconductor nanoparticles can be continuously tuned over a wide range of values by adjusting the density of the fluid phase in water-in-supercritical CO 2 microemulsions. The average size of the ZnS nanoparticles decreases linearly from approximately 9.1 to 1.9 nm with increasing fluid density from 0.86 to 0.99 gcm -3 at a water-to-surfactant ratio (W value) of 10. At a W value of 6, the particle size can be tuned from 7.0 to 1.5 nm in the same density range. In the case of CdS nanocrystals, the size varied from 7.1 to 2.0 nm when the W value was 10 and from 4.0 to 1.3 nm when the W value employed was 6, in the same density range. Monodispersive CdS and ZnS nanoparticles were synthesized by chemical reaction of cadmium or zinc nitrate with sodium sulfide, using two water-in-supercritical CO 2 microemulsions as nanoreactors followed by protection with a fluorinated-thiol stabilizer. The stabilizer is introduced at 6 and 16 minutes after the mixing of the two microemulsions where the intensity of the characteristic absorption peak due to the quantum confinement properties of the CdS and ZnS nanoparticles (280 and 360 nm) reaches a maximum, respectively. The supercritical CO 2 microemulsion method represents a simple approach to use a density-tunable solvent for synthesizing size-controlled semiconductor nanoparticles over a broad range of values.

19 citations


Journal ArticleDOI
TL;DR: In this article, it was shown that the relative volume of zircon to cadmium sulfo-selenide has an important role on the complete encapsulation of colorants and the quality of pigment.
Abstract: Preparation of fire red cadmium sulfo- selenide pigments based on zircon via solid-state reactions encountered with some difficulties. Undesirable reactivity and inadequate homogeneity of components are two important problems, which counteracted on completely covering of color agents by zirconium silicate and so stable production of these materials. It has shown that by using a sol-gel method the above-mentioned problem will be eliminated and a desirable color shade can be obtained. In the sol-gel process, at first a precipitatant was prepared by mixing of Se (dissolved in sodium sulfide solution) and a cadmium sulfate-zirconium acetate solution. Gelation was occurred by adding a diluted sodium silicate solution into the washed and dried precipitant. The mineralizer was lithium fluoride, which was added to the washed/dried gel. Calcinations of the later compound were done at about 950°C. The experiments showed that the relative volume of zircon to cadmium sulfo selenide has an important role on a complete encapsulation of colorants and so on quality of pigment. According to our experiment, the optimum relative volume of colorant agent to zircon was determined as bout 40/60.

16 citations


Journal ArticleDOI
TL;DR: In this article, the reactions of vinyl(phenyl)iodonium salts with sodium selenide, sodium sulfide and potassium thiocyanate have been studied.
Abstract: The reactions of vinyl(phenyl)iodonium salts with sodium selenide, sodium sulfide, sodium azide and potassium thiocyanate have been studied. Divinylic selenides, divinylic sulfides, vinylic azides and vinylic thiocyanates were synthesised stereoselectively in good yields.

Journal ArticleDOI
TL;DR: In this paper, 2.3-oxo-1-pentene-4-ynes were converted with sodium sulfide or hydrogensulfide to give 2,6-disubstituted 2,3-dihydrothiopyran-4 -one derivatives.
Abstract: 3-Oxo-1-pentene-4-ynes were converted with sodium sulfide or hydrogensulfide to give 2,6-disubstituted 2,3-dihydrothiopyran-4-one derivatives. The starting materials were prepared in two steps from terminal alkynes and α,β-unsaturated aldehydes.

Patent
14 Feb 2007
TL;DR: In this article, a method for extracting gallium from alumina production flow is proposed, which adopts ISEP ion separation technique and adsorption gallium chelating resin.
Abstract: The invention relates to a method for extracting gallium from alumina production flow. It adopts ISEP ion separation technique and adsorption gallium chelating resin. Its technology conditions are as follows: back flow adsorbing that liquor in Bayer process is processed by two stage series connection to make gallium concentration difference be 50-60 mg/L; back flow washing by 0.5-1N sodium hydroxide solution for the resin; back flow desorbing by 2-3N sodium hydroxide and 0.6-1.0N sodium sulfide solution; back flow rebirthing by 0.5-1N sodium hydroxide solution for the resin. It has the advantages of short flow, simple operation, little resin abrasion, high automation etc.

Journal ArticleDOI
TL;DR: A novel mercury removal technology was developed: injection of sodium tetrasulfide dissolved in the sodium hydroxide solution in the spray-dryer system and the effects of flue gas temperature and Na2S4 level inFlue gas on the mercury removal efficiency were investigated.
Abstract: Traditional pollution control technologies are able to capture oxidized forms of mercury to some extent; however, they show low efficiency for the control of elemental mercury emissions. This study developed a novel mercury removal technology: injection of sodium tetrasulfide (Na2S4) dissolved in the sodium hydroxide (NaOH) solution in the spray-dryer system. The effects of flue gas temperature and Na2S4 level in flue gas on the mercury removal efficiency were investigated. Na2S4 was decomposed into Na2S (S2-) and elemental S (S0), which reacted with HgCl2 and elemental Hg (Hg0), and HgS was then formed. Under the optimized operation parameters, this technology can simultaneously remove over 88% of HgCl2 and more than 90% of Hg0 from a flue gas stream containing about 400 μg m-3 Hg0 and 1200 μg m-3 HgCl2. The increased flue gas temperature (>170 °C) and the decreased Na2S4-to-Hg mass ratio (S−Hg−R) (<2.0) had negative effects on the reactions of gaseous mercury (HgCl2 + Hg0) with ionic sulfur (S2-) and S...

Journal ArticleDOI
TL;DR: In this paper, the effects of hydrogen sulfide supplementation on cardiac function during reperfusion in a clinically relevant experimental model of cardiopulmonary bypass were investigated in 12 anesthetized dogs undergoing hypothermic cardiac arrest.
Abstract: Hydrogen sulfide is produced endogenously by a variety of enzymes involved in cysteine metabolism. Clinical data indicate that endogenous levels of hydrogen sulfide are diminished in various forms of cardiovascular diseases. The aim of the current study was to investigate the effects of hydrogen sulfide supplementation on cardiac function during reperfusion in a clinically relevant experimental model of cardiopulmonary bypass. Twelve anesthetized dogs underwent hypothermic cardiopulmonary bypass. After 60 minutes of hypothermic cardiac arrest, reperfusion was started after application of either saline vehicle (control, n = 6), or the sodium sulfide infusion (1 mg/kg/hour, n = 6). Biventricular hemodynamic variables were measured by combined pressure–volume–conductance catheters. Coronary and pulmonary blood flow, vasodilator responses to acetylcholine and sodiumnitroprusside and pulmonary function were also determined. Administration of sodium sulfide led to a significantly better recovery of left and right ventricular systolic function (P < 0.05) after 60 minutes of reperfusion. Coronary blood flow was also significantly higher in the sodium sulfide-treated group (P < 0.05). Sodium sulfide treatment improved coronary blood flow, and preserved the acetylcholine-induced increases in coronary and pulmonary blood (P < 0.05). Myocardial ATP levels were markedly improved in the sulfide-treated group. Thus, supplementation of sulfide improves the recovery of myocardial and endothelial function and energetic status after hypothermic cardiac arrest during cardiopulmonary bypass. These beneficial effects occurred without any detectable adverse hemodynamic or cardiovascular effects of sulfide at the dose used in the current study.

Journal ArticleDOI
01 Aug 2007
TL;DR: Tetrabromo-p-benzoquinone reacted with excess aromatic amines to give 2,5-dirylamino-3,6-dibromo p-benzosquinones and triphenodithiazinediones.
Abstract: Tetrabromo-p-benzoquinone reacted with excess aromatic amines to give 2,5-dirylamino-3,6-dibromo-p-benzoquinones. The latter molecules on heating with sodium sulfide in alcohol in the presence of air gave triphenodithiazinediones. Heating with copper powder in nitrobenzene transformed these compounds into the respective indolocarbazolediones. Comparative antimicrobial and antifungal activities of the studied compounds were determined and discussed.

Patent
24 Jan 2007
TL;DR: The no-ash and no-sodium sulfide liming process for making pigskin leather features greatly reduced pollution, and no use of pollutant sodium sulfide, sodium hydrosulfide and lime makes it easy to treat exhausted waste water as discussed by the authors.
Abstract: The no-ash and no-sodium sulfide liming process for making pigskin leather features its greatly reduced pollution, and no use of pollutant sodium sulfide, sodium hydrosulfide and lime makes it easy to treat exhausted waste water. Compared with conventional technological process, the present invention has the advantages of no deposit, reduced waste water exhaust, short production period, saving in material and lowered comprehensive cost.

Journal ArticleDOI
TL;DR: In this article, an efficient double annulation procedure for substituted 2,3,6,7tetrahydrothiopyrano [2,3-b] thiopyran-4,5 -diones was described.
Abstract: An efficient synthetic procedure for substituted 2,3,6,7tetrahydrothiopyrano [2,3-b] thiopyran-4,5 -diones by a double annulation strategy is described. The ring systems are made in good yields from readily available dialkenoylketene dithioacetals in the presence of either sodium sulfide nonahydrate/N,N-dimethylformamide (DMF) or a sodium hydride/DMF/amine system.

Journal Article
TL;DR: Cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants of cadmium acetate and sodium sulfide in the presence of thioglycerol (TG) as capping agent in ethanol solvent as discussed by the authors.
Abstract: Cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants of cadmium acetate and sodium sulfide in the presence of thioglycerol (TG) as capping agent in ethanol solvent. Different nanoparticle sizes and size distribution were obtained through varying the molarities of thioglycerol. At higher TG concentration, synthesis provides a nearly monodisperse nanoparticles. Also this method reveals high stability of nanoparticles in ethanol solvent. Samples properties were investigated using UV-VIS absorption, photoluminescence spectroscopy and X-ray diffraction (XRD) methods.

Patent
25 Jun 2007
TL;DR: In this paper, a template compound is used during the material synthesis, such as reacting zinc chloride and sodium sulfide in the presence of the template compound, and later removed through calcination and washing to achieve the high surface area.
Abstract: Method and material for spectroscopic detection of organic chemicals. The material is a substantially optically transparent solid, such as ZnS, having a high surface area for adsorption of an analyte, such as organic chemical vapors. The solid material preferably has metal nanoparticles, such as gold, silver or copper nanoparticles, deposited on the surface for signal enhancement. A template compound, such as cetyl trimethyl ammonium bromide and alkoxylate block polymers, may be used during the material synthesis, such as reacting zinc chloride and sodium sulfide in the presence of the template compound, and later removed through calcination and washing to achieve the high surface area. The method of use includes collecting an analyte on the material and detecting the spectroscopic response of the analyte while it is collected on the surface. The mechanism of collection may include adsorbing, absorbing, and preconcentrating. Preferably, the spectroscopic response is selected from infrared spectra or ultraviolet-visible spectra.

Journal ArticleDOI
TL;DR: The current results point to the cytoprotective and anti-inflammatory effects of hydrogen sulfide, in cells exposed to nitrosative stress, and in animals subjected to endotoxemia.
Abstract: The aim of the current study was to test potential cytoprotective and anti-inflammatory effects of the novel biological mediator hydrogen sulfide in murine models. Murine J774 macrophages were grown in culture and exposed to cytotoxic concentrations of nitrosoglutathione, or peroxynitrite (a reactive species formed from the reaction of nitric oxide and superoxide). Pretreatment of the cells with sodium sulfide (60–300 μM) reduced the loss of cell viability elicited by the nitric oxide donor compound (3 mM) or by peroxynitrite (3 mM), as measured by the MTT method. Sodium sulfide did not affect cell viability in the concentration range tested. In mice subjected to bacterial lipopolysaccharide (LPS, 5 mg/kg i.p.), treatment of the animals with sodium sulfide (0.2 mg/kg/hour for 4 hours, administered in Alzet minipumps) reduced the LPS-induced increase in plasma IL-1β and TNFα levels. These responses were attenuated when animals were pretreated with the heme oxygenase inhibitor tin-protoporphyrin IX (6 mg/kg). The current results point to the cytoprotective and anti-inflammatory effects of hydrogen sulfide, in cells exposed to nitrosative stress, and in animals subjected to endotoxemia.

Patent
28 Nov 2007
TL;DR: In this article, the process of preparing monodispersive nanometer granular copper sulfide semiconductor has been described, which has the features of facile material, simple process, high efficiency, high yield, high stability and is suitable for industrial production.
Abstract: The present invention discloses process of preparing monodispersive nanometer granular copper sulfide semiconductor. The preparation process with common copper salt, sodium sulfide and N, N-dialkyl dithio formate as material is one simple chemical reaction process. The present invention has the features of facile material, simple process, high efficiency, high yield, high stability, etc, and is suitable for industrial production.

Patent
12 Dec 2007
TL;DR: The deoppilant making for drainage system is made in weight percentage of sodium sulfide 5-15%, liquid glass 3-10%, surface activator 05-30, disinfectant 05- 30, antiseptic 01-05, chelant EDTA 02-10, liquid perfume compounds 1-05% and water 70-85% as discussed by the authors.
Abstract: The invention relates to the deoppilant making for drainage system It is made in weight percentage of sodium sulfide 5-15%, liquid glass 3-10%, surface activator 05-30%, disinfectant 05-30%, antiseptic 01-05%, chelant EDTA 02-10%, liquid perfume compounds 01-05% and water 70-85%It solutes the sodium sulfide and liquid glass with water, adds the rest components for sufficient blending for 10 minutes till its even mixture to get the agent It is simple and significant in effect

Patent
20 Nov 2007
TL;DR: In this article, a multifunctional marsh gas decontaminating apparatus is presented, which is integrated with a plurality of functions such as desulfation, dehydration, and decarbonation into a whole.
Abstract: The utility model discloses a multifunctional marsh gas decontaminating apparatus. A marsh gas collecting device is added with caustic soda solution which occupies 50 to 70 percent of the cubage of the collecting device, an air inlet pipe of the collecting device after being prolonged is penetrated into the caustic soda solution. The aqueous solution of sulfureted hydrogen is a weak acid which can generate sodium sulfide and water after a chemical reaction with sodium hydroxide, carbon dioxide reacts with the sodium hydroxide to generate sodium carbonate and water, in addition, vapor in the marsh gas becomes liquid water in the aqueous solution, thereby playing the role of dehydration of the collecting device. The multifunctional marsh gas decontaminating apparatus improves the existing collecting device, is integrated with a plurality of functions such as desulfation, dehydration, and decarbonation into a whole, and has the characteristics of less investment, simple installation, safe use and operation, convenient management, etc.

Patent
18 Jul 2007
TL;DR: In this article, a pollution process of vanadic anhydride production waste water and its entire circulation technique is described. But the authors do not provide a detailed analysis of the entire circulation procedure.
Abstract: This invention provides a pollution process of vanadic anhydride production waste water and its entire circulation technique. Use end water of resin adsorbing extracting vanadium segment as soaking vanadium water of leaching segment, use ammonium salt immersing vanadium waste water that is added sodium chloride as vanadium salt stripping water of stripping segment, directly cyclically utilize in certain time; add iron sulfide mine powder and sodium sulfide into end water, add calcarea and sodium sulfide into immersing vanadium waste water, mix, stand still, precipitate, cyclically utilize clean liquid; eliminate high density natrium salt into saline water tank of salting producing ball segment, which is used as saline water of salting producing ball segment. This technique solves pollution problems of end water and immersing vanadium waste water in vanadic anhydride production. It also can utilize waste water natrium salt.

Journal ArticleDOI
Kwanhwi Park1, Hong Jeong Yu1, Hyun Uk Kang1, Sangsig Kim1, Sung Hyun Kim 
TL;DR: In this paper, spherical cadmium sulfide (CdS) nanoparticles, 4-5 nm in diameter, were synthesized using an aqueous mixture of Cd(NO3)24H2O and sodium sulfide solution in a microemulsion system and the effects of the water to surfactant molar ratio (W = [water]/[surfactant]), the concentration of precursors, the Cd to S precursor ratio, and the density of ultrasonic wave on the properties of the nanoparticles were examined.
Abstract: Spherical cadmium sulfide (CdS) nanoparticles, 4–5 nm in diameter, were synthesized using an aqueous cadmium nitride [Cd(NO3)24H2O] and sodium sulfide [Na2S9H2O] solution in a microemulsion system. The effects of the water to surfactant molar ratio (W = [water]/[surfactant]), the concentration of precursors, the Cd to S precursor ratio, and the density of the ultrasonic wave on the properties of the CdS nanoparticles were examined. The luminescent properties and the size effect of the nanoparticles were characterized using UV–vis absorption and photoluminescence (PL) spectra. The PL emission intensity did not change significantly with an increase in precursor and surfactant concentrations. The absorption edge and PL peak energy of the CdS nanoparticles shifted to shorter wavelengths with an increase in cadmium nitride concentration owing to a phase change and a decrease in CdS nanoparticle size.

Journal ArticleDOI
TL;DR: In this paper, the authors studied the regularities of silver dissolution in acid thiocarbamide electrolytes and showed that the catalytic effect is connected with the adsorption of sulfide ions on an interface.
Abstract: Regularities of silver dissolution in acid thiocarbamide electrolytes are studied. The kinetics of the process is shown to be severely affected by the admixture of hydrogen sulfide molecules that form upon inserting sodium sulfide or accumulate in electrolyte with the passage of time elapsed since its preparation. Catalytic effect increases with increasing length of time of the electrode’s contact with solution prior to the beginning of experiment or following an increase in the concentration of sulfide ions. Experiments with the surface renewed in the course of potential scans show that the catalytic effect is connected with the adsorption of sulfide ions on an interface. At large values of the surface coverage with sulfide ions, the dissolution rate increases so much that the dissolution process starts to be limited largely by the process of supply of thiocarbamide molecules toward the electrode surface.

Journal ArticleDOI
TL;DR: In this paper, the influence of sulfide ions on the formation of gold nanoparticles during reduction of HAuCl4 in an aqueous solution was studied using plasmon resonance spectroscopy and scanning tunneling microscopy.
Abstract: The influence of sulfide ions on the formation of gold nanoparticles during reduction of HAuCl4 in an aqueous solution is studied using plasmon resonance spectroscopy and scanning tunneling microscopy Upon the simultaneous addition of sodium citrate and sodium sulfide and for the molar ratios S/Au < 1, the nanoparticles have smaller sizes than those formed during the reduction only with sodium citrate under the same conditions; however, an increase in the sulfur content leads to an increase in the particle size The gold nanoparticles are also obtained under microwave heating with a single-stage reaction of an AuCl 4 − aqueous solution with sodium sulfide The particle size decreases with an increase in the S/Au ratio

Patent
11 Apr 2007
TL;DR: In this paper, the process of producing high purity crystalline sodium sulfide product and low iron sodium sulphide byproduct includes the following steps: calcining barium sulfide material, leaching and acidolyzing to prepare H 2S, purifying H2S, absorbing reaction with ion film caustic soda, evaporating concentration and cooling crystallization, centrifugal separation, and crystallization of the mother liquid.
Abstract: The process of producing high purity crystalline sodium sulfide product and low iron sodium sulfide by-product includes the following steps: calcining barium sulfide material, leaching and acidolyzing to prepare H2S, purifying H2S, absorbing reaction with ion film caustic soda to obtain sodium sulfide solution, evaporating concentration and cooling crystallization, centrifugal separation to obtain high purity crystalline sodium sulfide product; and evaporating concentration and cooling crystallization of the mother liquid after centrifugal separation to obtain low iron sodium sulfide by-product. The present invention has comprehensive utilization of material, high product purity, low production cost and other features.

Patent
18 Apr 2007
TL;DR: In this article, a new method for producing sodium sulfite and sodium sulfide by using sulfur alkali reduced waste water was proposed, which includes the following steps: using SAL as mother liquor, vacuum evaporation of mother liquor water, vacuum concentrating desalted or saltless mother liquid water, heating concentrating or evaporating the residual solution, and further vacuum evaporating said saturated solution whose residue is removed so as to obtain white anhydrous sodium sulphite.
Abstract: The present invention relates to a new method for producing sodium sulfite and sodium sulfide by using sulfur alkali reduced waste water. Said method includes the following steps: using sulfur alkali reduced waste water as mother liquor, vacuum evaporating mother liquor water, vacuum concentrating desalted or saltless mother liquor water to obtain the mixture of sodium sulfite and sodium sulfide; preparing saturated solution of said mixture; using active carbon to make adsorption and decolouring, press-filtering and removing residue; further vacuum evaporating said saturated solution whose residue is removed so as to obtain white anhydrous sodium sulfite; heating concentrating or evaporating the residual solution so as to obtain sodium sulfide.