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Sodium sulfide

About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.


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Patent
17 Mar 2010
TL;DR: In this paper, an alkaline cleaner for removing simple substance mercury in a natural gas separator and a cleaning technique thereof, which can thoroughly remove residual paraffin in the separator, converts the simple substances mercury into non-volatile compound, avoids corrosion for carbon steel and stainless steel, and has the advantages of low cost and no pollution.
Abstract: The invention discloses an alkaline cleaner for removing simple substance mercury in a natural gas separator and a cleaning technique thereof, which can thoroughly remove residual paraffin in the separator, converts the simple substance mercury into non-volatile compound, avoids corrosion for carbon steel and stainless steel, and has the advantages of low cost and no pollution. The alkaline cleaner contains the raw materials by weight percent: at least two of 1-40% of sodium sulfide, 0.1-15% of sodium polysulfide and 1-35% of sodium thiosulfate, at least one of 0.1-10% of sodium nitrate, sodium phosphate and sodium sulfate, at least one of 0.1-15% of sulfuric acid and phosphoric acid, 0.5-20% of non-ionic surface active agent, 0.5-10% of anion surface active agent, 0.5-15% of oxygen-containing solvent, 0.1-10% of inhibiter and less than or equal to 90% of water; and the pH value is more than 10.0.

6 citations

Patent
12 Jan 2011
TL;DR: In this article, a method for synthesizing a ZnS-doped nanometer luminescent material by an oil-water interface method was proposed, where deionized water and toluene are used as solvent, zinc stearate is used as a source of zinc ions, manganese stearates was used as an alternative source of manganes ions, europium Stearate was used to source europside ions, and oleic acid was used for surfactant.
Abstract: The invention relates to a method for synthesizing a ZnS-doped nanometer luminescent material by an oil-water interface method. In the method, deionized water and toluene are used as solvent, zinc stearate is used as a source of zinc ions, manganese stearate is used as a source of manganese ions, europium stearate is used as a source of europium ions, sodium sulfide is used as a source of sulfur ions, oleic acid is used as a surfactant, the reacting temperature is controlled by an oil bath, the upper oil phase is electrically stirred, and the lower water phase is magnetically stirred, so the whole reaction is performed in the protection of nitrogen. The method has the advantages of low cost, convenient operation, small pollution, high efficiency and the like, can prepare ZnS:Mn and ZnS:Eunanometer materials with higher fluorescent strength, can realize mass production of the ZnS:Mn and ZnS:Eu nanometer materials, and has excellent application prospect.

6 citations

Patent
17 Nov 2010
TL;DR: In this paper, a method for synthesizing di-propyltriethoxysilane]-tetrasulfide is described, which comprises the following steps of mixing and stirring water, sodium sulfide, sodium hyposulfate, elemental sulfur and diethyl hydroxylamine, pumping n-amylamine and isobutylamine into the mixture under the vacuum degree of 0.04 to 0.06MPa, and reacting the mixture for 20 to 40 minutes at the temperature of between 30 and 50 DEG C; adding dodec
Abstract: The invention discloses a method for synthesizing di-[propyltriethoxysilane]-tetrasulfide, which comprises the following steps of: (1) mixing and stirring water, sodium sulfide, sodium hyposulfate, elemental sulfur and diethyl hydroxylamine, pumping n-amylamine and isobutylamine into the mixture under the vacuum degree of 0.04 to 0.06MPa, and reacting the mixture for 20 to 40 minutes at the temperature of between 30 and 50 DEG C; (2) adding dodecyltrimethylammonium chloride, tetrabutyl ammonium bromide and hydroxy pyridine into the reaction solution obtained in the (1) under normal pressure, stirring the solution, then adding gamma-chloropropyltriethoxysilane into the solution, reacting the solution for 30 to 60 minutes at the temperature of between 40 and 50 DEG C, continuously reacting the solution for 60 to 80 minutes at the temperature of between 60 and 80 DEG C, filtering the oil phase, and pumping the filtrate into a distillation still; and (3) distilling the filtrate in the distillation still under the vacuum degree of more than or equal to 0.096MPa at the temperature of less than or equal to 160 DEG C when the temperature of the top gas phase is more than 108 DEG C to obtain a product Si-69.

6 citations

Patent
05 May 2010
TL;DR: In this article, a method for preparing high-purity cobalt nitrate by utilizing an alumina-supported cobalt-based spent catalyst for Fischer-Tropsch synthesis is presented.
Abstract: The invention discloses a method for preparing high-purity cobalt nitrate by utilizing an alumina-supported cobalt-based spent catalyst for Fischer-Tropsch synthesis. High-purity Co(NO3)2.6H2O is obtained by the following steps of grinding, dissolving in concentrated hydrochloric acid, precipitating cobalt by sodium sulfide, precipitating cobalt by oxalic acid, roasting, dissolving in nitric acid, evaporating, crystallizing, and the like. The method has low requirements to instruments and equipments, high recovery ratio and high product purity; the cobalt recovery ratio is more than 91 percent, and the purity of the recovered and prepared Co(NO3)2.6H2O is more than 99.9 percent.

6 citations

Patent
28 Dec 1970
TL;DR: In this paper, a catalytic process for increasing the rate of explosion of kaline solids is described, where the reaction by the reaction of the reaction is calculated.
Abstract: A CATALYTIC PROCESS FOR ENHANCING THE RATE OF OXIDATION OF ALKALINE SOLUTIONS OF WATER-SOLUBLE, OXIDIZABLE, INORGANIC SULFIDES AND/OR HYDROSULFIDES WHEREIN EFFECTIVE CATALYTIC AMOUNTS OF WATER-INSOLUBLE SMELT SOLIDS ARE EMPLOYED. THESE SOLIDS SELECTIVELY CATALYZE THE REACTION BY WHICH THIOSULFATE IS FORMED. THIS CATALYTIC PROCESS MAY ALSO BE EMPLOYED FOR SUBSTANTIALLY INCREASING THE RATE OF OXIDATION OF SULFIDES IN A PULPING GREEN LIQUOR TO THEREBY GREATLY DEPLETE THE AMOUNT OF SODIUM SULFIDE PRESENT THEREIN AND SIMULTANEOUSLY FORM SUBSTANTIAL QUANTITIES OF SODIUM HYDROXIDE WHICH MAY BE EMPLOYED TO ABSORB EFFLUENT SULFUR DIOXIDE EMANATING, FOR EXAMPLE, FROM BOILERS.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202233
202136
2020107
2019143
2018172