Showing papers on "Sodium sulfite published in 2004"

Simultaneous removal of nitrogen oxide/nitrogen dioxide/sulfur dioxide from gas streams by combined plasma scrubbing technology.

Abstract: Oxides of nitrogen (NOx) [nitrogen oxide (NO) + nitrogen dioxide (NO2)] and sulfur dioxide (SO2) are removed individually in traditional air pollution control technologies. This study proposes a combined plasma scrubbing (CPS) system for simultaneous removal of SO2 and NOx. CPS consists of a dielectric barrier discharge (DBD) and wet scrubbing in series. DBD is used to generate nonthermal plasmas for converting NO to NO2. The water-soluble NO2 then can be removed by wet scrubbing accompanied with SO2 removal. In this work, CPS was tested with simulated exhausts in the laboratory and with diesel-generator exhausts in the field. Experimental results indicate that DBD is very efficient in converting NO to NO2. More than 90% removal of NO, NOx, and SO2 can be simultaneously achieved with CPS. Both sodium sulfide (Na2S) and sodium sulfite (Na2SO3) scrubbing solutions are good for NO2 and SO2 absorption. Energy efficiencies for NOx and SO2 removal are 17 and 18 g/kWh, respectively. The technical feasibility of CPS for simultaneous removal of NO, NO2, and SO2 from gas streams is successfully demonstrated in this study. However, production of carbon monoxide as a side-product (approximately 100 ppm) is found and should be considered.

Production of spruce dissolving pulp with the prehydrolysis-alkaline sulfite process (ph-asa)

Abstract: Kraft and soda/AQ pulping are wellestablished technologies for paper pulp production. With preceding acid hydrolysis (PH) the kraft process is also used for dissolving pulp production. The simple soda process is preferentially applied to nonwoods, but as PH-Soda/AQ process also appropriate for production of dissolving pulps from hardwoods. The alkaline sulfite pulping process with addition of anthraquinone and methanol (ASAM) was developed initially as an alternative to the kraft process for the production of paper pulps. With a prehydrolysis stage, this process can also be used to produce high-grade dissolving pulps [1-4]. Up to now, this process has not been implemented on an industrial scale mainly due to problems caused by the presence of methanol in this process. It requires an explosion proof digester house and methanol recovery facilities. We have tried to eliminate methanol without losing the distinct advantages of the ASAM pulping process. Without methanol, the extent of delignification is considerably reduced. This loss in delignification efficancy can be compensated for by changing the Na2SO3:NaOH ratio and the mode of NaOH addition. A high percentage of sodium sulfite in the total chemical charge as applied in ASAM cooking provides the process with high selectivity in lignin removal. With increased sodium hydroxide percentage delignification is improved at the expense of selectivity. A high charge of sodium hydroxide results in an enhanced carbohydrate degradation, especially in the initial cooking phase. It was possible to demonstrate that the results of alkaline sulfite/AQ pulping with increased NaOH percentage in the total chemical charge can be substantially improved when the NaOH charge is split: one part is added to the impregnation liquor and another part is added when the maximum cooking temperature has been reached. In softwood pulping this NaOH splitting has a twofold effect: the pulp viscosity increases and simultaneously delignification is extended. With this so-called ASA process we were able to obtain results similar to those achieved in ASAM pulping [5]. This was the starting point for our investigations on ASA pulping with prehydrolysis for production of dissolving pulps.

Method for recovering purified sodium bicarbonate and ammonium sulfate

Abstract: A process for recovering sodium bicarbonate and ammonium sulfate from a sodium sulfate solution. The sodium sulfate solution can be pure or contain other compounds such as sodium sulfite, carbonate, chloride, fluoride, nitrate and nitrite as would be the case if the sodium sulfate solution were derived from a sodium bicarbonate flue gas purification process. Carbon dioxide and ammonia gases or solid ammonium bicarbonate are added to the sodium sulfate solution to precipitate sodium bicarbonate which is removed from solution. The remaining solution is treated in a unique series of precipitation steps in which reactants are first recycled back to the sodium bicarbonate crystallizer and then the amount of sodium in the solution is adjusted to an amount that allows high grade ammonium sulfate fertilizer product to be produced. The process is accomplished using evaporation and precipitation unit operations in a unique sequence that results in 100% conversion of the sodium salt feed stock to sodium bicarbonate and ammonium sulfate in a commercially viable manner.

Adsorption absorption reaction type formaldehyde eliminating agent

Abstract: An adsorption-absorption reaction type formaldehyde removing agent is composed of adsorption-absorption agent (activated carbon, alumina, diatomite, polyamide or water) for adsorbing and absorbing the formaldehyde from indoor air, and reactant (sodium sulfite and ammonium salt or hydroxy amine hydrochloride) for reacting on adsorbed and absorbed formaldehyde to become non-toxic, no-odor and non-pollution substance.

Hair dyeing, hairdressing agent and its making method

Abstract: Disclosed is a hair dyeing, hairdressing agent and its making method, which comprises additive, dyestuff agent and metallic chelating agent, wherein the additive comprises the following raw materials, acetylcysteine hydrazine derivative, homologue and salts, sodium sulfite, sodium carboxymethylcellulose, disodium ethylenediamine tetraacetate, monoethanol-amine, and balancing deionized water.

Electrolyte membrane for fuel cell

Abstract: PROBLEM TO BE SOLVED: To improve the largest faults in the fluoropolymer ion exchange membrane that ion exchange capacity is small and water holding property is inferior, and furthermore to improve the largest faults that oxidation resistance is low in the cross-linked PTFE ion exchange membrane in which only hydrocarbon monomer is grafted. SOLUTION: As the substrate, a fluoropolymer is made to be a matrix and irradiation is carried out to this, and after epoxy group-containing monomer is graft-copolymerized, sodium sulphonate group is introduced by solution of sodium sulfite or sodium bisulfite, and furthermore this is made to be sulfonic acid group, and the ion exchange membrane in which graft rate of this ion exchange membrane is 10-150% and ion-exchange capacity is 0.3-3.0meq/g and which has a superior oxidation resistance and a wide ion-exchange capacity and which is especially suitable for a fuel cell is provided. COPYRIGHT: (C)2004,JPO

Process for microwave radiation synthesizing cellulose base high water absorption resin

Abstract: The microwave radiation process of synthesizing cellulose-base resin with high water absorption includes the following steps: moistening cellulose with deionized water, gelatinizing under microwave radiation, adding potassium persulfate or potassium permanganate and sodium thiosulfate or sodium sulfite oxidation-reduction initiating system and microwave radiating to initiate the reaction for 4-7 min; adding successively the crosslinking agents N,N-methyene-bisacrylamide, epoxy chloropropane or polyglycol bisacrylate, acrylamide or propenyl sodium sulfonate and acrylic acid or methyl acrylic acid, regulating neutralizing degree to 65-75%, reaction under stirring and microwave radiation for 7-10 min, soaking the produced white matterin methanol for 3-5 hr, stoving and crushing. The present invention completes the grafting copolymerization of cellulose in only ten-odd min, and jas high production efficiency and other advantages.

Method for clarifying filter membrane module with chemical

Abstract: PROBLEM TO BE SOLVED: To provide a method for clarifying a filter membrane module with a chemical without detaching the filter membrane module from an apparatus and capable of treating a clarifying waste liquid generated when chemical clarification is carried out safely, sanitarily and at a low cost to a water quality level allowing the liquid to discharge to a public water area of water in a purification plant site at which a membrane filter apparatus is installed. SOLUTION: In a chemical clarifying process of the filter membrane module, a primary process is carried out using an admixture solution of sodium hydroxide and sodium hypochlorite as a clarifying chemical liquid, and a secondary process is carried out using a reducing acid solution such as a sodium hydrogen sulfite solution, a sodium sulfite solution, a sodium thiosulfate solution or the like as the clarifying chemical liquid. COPYRIGHT: (C)2005,JPO&NCIPI

6 3 the trivalent chromate which contains no trace of hexavalent chrome nor any oxidizing agent

Abstract: PURPOSE: A trivalent chromate solution is provided in which hexavalent chrome and oxidizer are not contained, a method for preparing the solution is provided, and a method for preparing a film of the solution by coating the solution on electro-galvanized automobile parts and hot dip galvanized strip and steel pipe is provided. CONSTITUTION: In a chromate solution that is a passivation agent in which hexavalent chrome and oxidizer are not contained, but trivalent chrome is contained, the chromate solution is characterized in that it contains sulfate and sulfite, wherein the sulfite is sodium sulfite or potassium sulfite, and wherein the chromate solution contains 0.5 to 15 g/L of sulfite. The method for preparing a chromate solution comprises the processes of dry bathing a base compound solution to 3 to 12 vol.% of water; adding 3 to 10 vol.% of subsidiary compound solution to the dry bathed base compound solution; and adding nitric acid to the mixture so that pH of the chromate solution becomes 1.5 to 2.0, wherein the base compound solution comprises one or more selected from the group consisting of 25 to 35 g/L of trivalent chrome and 0.5 to 15 g/L of sulfate and sulfite; one or more selected from the group consisting of 1 to 3 g/L of nitrate and 0.1 to 15 g/L of Co, Mo, Ti and Ni; and one or more selected from the group consisting of 0.1 to 1 g/L of PEG, PVA and formalin condensate of sodium naphthalene sulfonate on the basis of the chromate solution, and the subsidiary compound solution comprises 50 to 350 g/L of phosphoric acid; methanol or methylene chloride, or methanol and methylene chloride; and one or more selected from the group consisting of silica sol, formic acid, meta acrylic acid and acryl amide.

Dechlorinating tablet and method for manufacture

Abstract: A dehalogenating agent is disclosed that is useful for treating aqueous media. The agent contains at least one sulfite salt, such as sodium sulfite. In the agent, the salt is in mixture with a lubricant, an excipient and a saccharide binder. Then a dry, blended mixture of the agent components is directly compressed to form tablets not only of desirable strength and hardness, but also of desirably controlled dissolution rate.

Photocatalysis of the Release of Molecular Hydrogen from Aqueous Solutions of Sodium Sulfite by Composite CdS/Ni Nanoparticles

Abstract: The photocatalytic reduction of Ni2+ cations at the surface of CdS nanoparticles was investigated. It was found that the CdS/Ni nanocomposite formed as a result of the reaction exhibits photocatalytic activity in the release of molecular hydrogen from aqueous solutions of sodium sulfite. The kinetic relationships of the process are studied, and a mechanism for the studied reactions is proposed.

Improvement of RT-PCR Sensitivity for Fruit Tree Viruses by Small-scale dsRNA Extraction and Sodium Sulfite

Abstract: Woody plant tissues contain great amounts of phenolic compounds and polysaccharides. These substances inhibit the activation of reverse transcriptase and/or Taq polymerase in RT-PCR. The commonly used multiple-step protocols using several additives to diminish polyphenolic compounds during nucleic acid extraction are time consuming and laborious. In this study, sodium sulfite was evaluated as an additive for nucleic acid extraction from woody plants and the efficiency of RT-PCR assay of commercial nucleic acid extraction kits and small-scale dsRNA extraction was compared. Sodium sulfite was used as an inhibitor against polyphenolic oxidases and its effects were compared in RNA extraction by commercial extraction kit and small-scale double-stranded RNA (dsRNA) extraction method for RT-PCR. During nucleic acid extraction, addition of 0.5%-1.5%(w/v) of sodium sulfite to lysis buffer or STE buffer resulted in lighter browning by oxidation than extracts without sodium sulfite and improved the RT-PCR detection. When commercial RNA extraction kit was used, optimal concentrations of sodium sulfite were variable according to the tested plant. However, with dsRNA as RT-PCR template, sodium sulfite 1.5% in STE buffer improved the detection efficiency of Apple chlorotic leaf spot virus (ACLSV) and Apple stem grooving virus (ASGV) in fruit trees, and reduced the unspecific amplifications signi-ficantly. Furthermore, when viruses existed at low titers in host plant, small-scale dsRNA extractions were very reliable.

Heavy metal elution inhibitor and heavy metal elution inhibiting method

Abstract: PROBLEM TO BE SOLVED: To provide a heavy metal elution inhibitor and a heavy metal elution inhibiting method in which heavy metals containing hexavalent chromium, arsenic, and selenium which are hardly immobilized sufficiently with a known chelating agent can be immobilized SOLUTION: The heavy metal elution inhibitor contains at least one kind of reducing agent to be selected from ferrous sulfate, ferrous chloride, sodium sulfite and potassium sulfite, at least one kind of coagulant to be selected from poly-iron-sulfate and sulfuric band, and water In addition, elution of heavy metals from a stuff to be treated is inhibited by kneading the heavy metal elution inhibitor with the stuff containing heavy metals COPYRIGHT: (C)2004,JPO&NCIPI

Camptothecins-containing medicinal composition

Abstract: PROBLEM TO BE SOLVED: To provide a camptothecins-containing medicinal composition in which decomposition caused when camptothecin or its derivative is stored for a long period and when the compound is irradiated with light is suppressed. SOLUTION: The camptothecins-containing medicinal composition comprises (a) camptothecin or its derivative and (b) one or more kinds of compounds selected from ascorbic acid or its salt, sodium hydrogensulfite, sodium sulfite, potasium pyrosulfite, sodium erysorbate, sodium thioglycollate, sodium pyrosulfite and α-thioglycelol. COPYRIGHT: (C)2005,JPO&NCIPI

Stress corrosion cracking behaviour of Al-Li alloy 8090-T8171 plate exposed to various synthetic environments

Abstract: The stress corrosion cracking (SCC) behaviour of 8090-T8171 plate material was investigated in short transverse direction performing constant load tests and constant extension rate tests under permanent immersion conditions. At an applied stress of 100 MPa, smooth round tensile specimens were exposed to synthetic environments containing chlorides and various nonhalide anions. Environment-induced cracking was not observed in aqueous solutions of 0.6 M NaCI, LiCl, NH 4 Cl, or MgCl 2 . In 0.6 M NaCI solutions containing 0.06 M Na 2 SO 4 or Na 3 PO 4 , the SCC behaviour of 8090-T8171 plate was similar to that observed in pure 0.6 M NaCI solution. Sodium chloride solutions with additions of nitrate, hydrogen carbonate, or carbonate promoted stress corrosion cracking. Threshold stresses below 100 MPa were obtained from constant load tests using the latter environments. When sodium sulfite or sodium hydrogen phosphate was added, values being 100 MPa or slightly higher were determined. Lithium and ammonium present as cations in mixed salt electrolytes accelerated SCC failure. Lithium chloride solutions containing nitrate, hydrogen carbonate, carbonate, or sulfite were highly conducive to stress corrosion cracking. Very low SCC resistance was found for alloy 8090-T8171 exposed to synthetic environments with additions of ammonium salts. Constant extension rate tests were carried out using notched tensile specimens. Displacement rates were in the range 2 × 10 -6 - 2 × 10 -5 mms -1 . Aqueous 0.6 M NaCI solutions with additions of 0.06 M NH 4 HCO 3 , (NH 4 ) 2 SO 4 , or Li 2 CO 3 promoted environment-induced cracking with 8090-T8171 plate, as indicated by severe degradation of notch strength. The constant extension rate testing technique did not indicate SCC susceptibility using sodium chloride solutions containing sodium sulfate or lithium sulfate. For specimens exposed to substitute ocean water a slight degradation of notch strength was found at the lowest displacement rate applied.

Composite high-efficiency ice melting snoal-removing agent

Abstract: An efficient ice-melting and snow-removing composition granule is prepared from one of sodium chloride, calcium chloride and magnesium chloride, two or three or four of sodium nitrate, calcium nitrate, calcium chloride and magnesium chloride and one or two or three of sodium molybdate, sodium benzoate, sodium sulfite, barium sulfite, sodium phosphate and sodium metasilicate Its advantages are no corrosion and no damage to plant

Preparation method of coloured vision strengthening paper

Abstract: A color paper of taking care of eye health and improving vision is prepared through breaking wheat straw, proportionally mixing it with sodium sulfite, sodium hydroxide and anthraquinone, digestion to become pulp, sieving, adding liquid chlorine, sodium hydroxide and sodium hypochlorinite, thermal bleaching, pulverizing, adding alkaline bright yellow, alkaline green, aluminium sulfate, rosin gum and dithionour acid oil, diluting by water, shaping paper on net and drying.

Organic compound decomposing material

Abstract: PROBLEM TO BE SOLVED: To provide an organic compound decomposing material low in cost, having high decomposition capacity of an organic compound and excellent stability, and hardly affecting the environment. SOLUTION: The organic compound decomposing material contains a reducing agent such as sodium sulfite or sodium hydrogen sulfite and a metallic oxide such as iron oxide or titanium oxide. The material has excellent decomposing capacity for harmful organic compounds, particularly for highly volatile organic compounds, hardly causes secondary environmental pollution and soil degradation, and uses an inexpensive material such as the metallic oxide, thus the material is useful as a soil purification material. COPYRIGHT: (C)2004,JPO

Method of extraction of non-ferrous and noble metals

Abstract: FIELD: concentration of minerals; extraction of non-ferrous and noble metals from tailings of sulfide ore cyanidation process and concentration products. ^ SUBSTANCE: prior to conditioning with collecting and foam agents, pulp is treated with reagent reducing content of cyanide in initial pulp and then with reagent increasing floatability of metals. Used as collecting agent is disulfide dixanthogen. Used as reagent reducing content of cyanide in pulp is green vitriol and used as reagent increasing the floatability of metals is sodium sulfite. ^ EFFECT: enhanced floatability of valuable components and selectivity of process. ^ 3 cl, 1 tbl, 2 ex

Method for treating exhaust gas from sulfuric acid manufacturing process

Abstract: PROBLEM TO BE SOLVED: To provide a method for treating an exhaust gas from a sulfuric acid manufacturing process, by which sodium sulfite contained in an absorption waste liquid is oxidized easily without air blowing in the final absorption process of the sulfuric acid manufacturing process to reduce treatment costs when a non-reacted sulfur dioxide gas in the sulfuric acid manufacturing process is treated. SOLUTION: The non-reacted sulfur dioxide gas in the sulfuric acid manufacturing process is made to react on a caustic soda aqueous solution in the final absorption process to produce the absorption waste liquid containing mainly Na 2 SO 3 and NaHSO 3 . The absorption waste liquid is then supplied to a cleaning/cooling process for a smelting exhaust gas, in which the waste liquid is made to come into contact with high-temperature sulfur dioxide and oxygen to reclaim sulfur dioxide and to oxidize Na 2 SO 3 (the above sodium sulfite) into Na 2 SO 4 . A circulation liquid is extracted from the cleaning/cooling process as a waste acid to be used for manufacturing gypsum dihydrate composed of large crystalline grains. COPYRIGHT: (C)2005,JPO&NCIPI

Method of producing protein hydrolyzate from keratin-containing raw material

Abstract: FIELD: biotechnology. SUBSTANCE: invention relates to technology of production of protein product from animal-origin keratin-containing raw material for use in pharmaceutical industry, cosmetics, food industry as well as in cattle breeding when preparing food additives. Protein hydrolyzate is prepared in enzymatic process involving preliminarily treating starting material with sodium sulfite aqueous solution at pressure 0.1-0.3 MPa. Advantageously, starting material is poultry fuzz-feather, which is treated with 0.1-0.5% sodium sulfite aqueous solution at weight ratio of raw material to treatment solution between 1:10 and 1:20, whereas enzymatic hydrolysis is carried out in presence of enzyme exhibiting proteolytic activity at least 10000 units per 1 kg raw material at continuous stirring of reactants with a speed of 90 to 150 rpm. Resulting product is preferably recovers by separation and/or filtration followed by drying, preferably spray drying, while spent sodium sulfite solution is recycled. EFFECT: enabled efficient separation of treated raw material and aqueous sodium sulfite solution, which along with recycling of chemical reagent leads to reduced expenses. 10 cl, 2 tbl, 4 ex

A MILD METHOD FOR CONVERSION OF ALCOHOLS TO DIALKYL SULFITES BY USE OF Na2SO3/SOCl2

Abstract: Alcohols are easily converted to their corresponding dialkyl sulfite under mild reaction conditions using Na2SO3/SOCl2 in moderate to good isolated yields.

Decomposing agent for organic compound and environmental decontaminating method using it

Abstract: PROBLEM TO BE SOLVED: To provide a low-cost decomposing agent for an organic compound that has a high performance of decomposing an organic compound, particularly a gaseous high-volatility organic compound and is less prone to exert influence on the environment, and an environmental decontaminating method using it. SOLUTION: The decomposing agent for an organic compound contains a reducing agent such as sodium sulfite and sodium hydrogensulfite and a metal oxide such as iron oxide and titanium oxide and also water in the range of 10 to 250% by weight based on the total amount of the reducing agent and the metal oxide. The decomposing agent for an organic compound is suitable for decomposing a gaseous or misty organic compound and also superior in durability of effect. The decomposing agent for an organic compound is useful for decontaminating soil, underground water, atmosphere or the like contaminated with an organic compound, since it is low in cost and is less prone to exert influence on the environment. COPYRIGHT: (C)2004,JPO&NCIPI

Method for preparing 2,3-dibromo-2-butene-1,4-glycol

Abstract: This invention relates to a making method of 2,3-dibromo-dibutene-1,4-diol The procedure includes: (1) drop Br into 1,4-butynoic alcohol solution to react with milling, the mole ratio of 1,4-butynoic alcohol and Br is 1:1-12, the reaction temperature is 8-13degC, the time of Br adding is 1-12 hours, and the reacted products through filtering get the crude 2,3-dibromo-diethylidene-1,4-diol (2) use absolute alcohol and sodium sulfite to heat and dissolve the crude product, and the weight ratio of absolute alcohol and sodium sulfite is 065-10:1, and the weight share ratio of sodium sulfite and crude product is 0001-0005:1, filter if while hot, and cool it to 8-12degC to get the crystal, and the crystal through filtering and drying to becomes the refined product This invention has short time of Br dropping, small dosage of heavy crystallization solution, simple technique and high purity of product

Medicament protecting agent capable of resisting cold, increasing dissolution and resisting oxidation

Abstract: The invention provides a freeze proof, dissolution increasing, oxidation resisting protector and its preparing process. It is characterized in that it is prepared by the following raw materials in weight portion as: 10%-80% carbowax200 to20000 portions, 0.1%-10% tween 20 to 80 portions, sodium bisulfite or sodium sulfite 0.5 to 5 portions, sodium chloride 5 to 100 portions.The protector can increase the clarity and stability of the biochemical peptide and Chinese herbal injection, thus prevents the problems of cloudiness after low temperature refrigeration in the storage and transportation process.

Optically pure S-(-)-and R-(+)- Omeprazole prepn and the prepn process

Abstract: The present invention relates to pharmaceutical technology, and provides optically pure S-(-)- and R-(+)-Omeprazole preparation and the preparation process. During the preparation, alkali matter, such as sodium hydroxide, magnesium hydroxide, sodium phosphate, sodium carbonate, etc. is added to maintain pH not lower than 9; certain amount of stabilizer, such as sodium sulfite, sodium thiosulfate, etc. is added; and the special preparation steps, such as gas pelletizing, coating, drying, etc. are adopted to maintain the outer character and optical purity of the preparation during processing, storing and transportation. The present invention prepares tablet, capsule, injection and other preparations suitable for oral taking and non-intestinal tract administration to reach treatment aim with the effective components.

High efficient easy resolving decanoy acetaldehyde

Abstract: The invention is a high-efficacy soluble houttuynium, its chemical name: capryl aldehyde sodium sulfite and its molecular formula: C10H19O5SNa, using caprylic acid, glacial acetic acid, calcium hydroxide, ethyl formate, metal Na, sodium bisulfite and so on as raw materials, and synthesizing and obtaining it by a series of process steps, and its activity is higher than that of the synthetic houttuynium and new houttuynium and its water solubility is also better than that of them both, and it has a wide application prospect in medicines.

Agent for keeping freshness of plant

Abstract: PROBLEM TO BE SOLVED: To obtain an agent for keeping the freshness of a plant, which suppresses the generation of ethylene by the plant as such and has an excellent freshness-keeping effect, and to provide a method for keeping the freshness of the plant by using the same. SOLUTION: The agent for keeping the freshness of the plant contains a water soluble sodium compound (sodium sulfite, sodium silicate, sodium metasilicate, sodium orthosilicate, sodium carbonate, sodium acetate, sodium chloride, sodium hydrogencarbonate, and the like) as the active ingredient. When using the agent, the concentration of the water soluble sodium compound is preferably regulated so as to be 1-1,000 mass ppm. The agent for keeping the freshness of the plant is applied to the whole or a part of the objective plant. COPYRIGHT: (C)2004,JPO