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.

Recent Advances in Multicomponent Reactions with Organic and Inorganic Sulfur Compounds

Abstract: In recent years, multicomponent reactions with inorganic and organic sulfur compounds as one of reactants have achieved a remarkable development. In this review, we summarize recent advances in the multicomponent reactions involving sulfur components, which include elemental sulfur, sodium metabisulfite, sodium hyposulfite, potassium pyrosulfite, DABSO, sodium sulfide, thiocyanate, sulfur dioxide, carbon disulfide and other divalent, tetravalent and hexavalent organosulfur compounds.

Effects of Sodium Thiosulfate and Sodium Sulfide on the Corrosion Behavior of Carbon Steel in an MDEA-Based CO 2 Capture Process

Abstract: The corrosion behavior of carbon steel has been tested in the presence of sodium thiosulfate and sodium sulfide in an MDEA-based CO2 capture system using electrochemical methods, weight loss measurements and surface analysis. The results of electrochemical measurements revealed that both thiosulfate and sulfide showed corrosion resistance properties to carbon steel corrosion. The corrosion resistance for the system with thiosulfate increased with concentration, while the system with sulfide yielded better corrosion resistance to carbon steel at lower concentrations as increase in sulfide concentration decreased the corrosion resistance. The corrosion inhibition behaviors for both systems at 0.05 M salt concentrations were confirmed by weight loss measurement, and the solution with sodium sulfide exhibited a better inhibition with time.

Method for preparing albendazole

Abstract: The present invention relates to a preparation method of albendazole The preparation method comprises condensation reaction, reduction reaction and ring-closing reaction In the condensation reaction, polyethylene glycol is used as phase transfer catalyst; pure sodium hydroxide solution is used to replace sodium cyanide solution or sodium sulfide solution; the clathrate separation method with zinc chloride is adopted to directly separate a condensation substance, 2-nitro-4-propyl aniline zinc chloride complex, from the mixture of the reaction; then alkali is used for destroying the complex and dissolving the zinc chloride to prepare pure 2-nitro-4-propyl aniline; in the reduction reaction, hydrazine hydrate is used for reduction; in the ring-closing reaction, 0-methyl isourea formic ether is used as ring-closing agent The preparation method has the advantages of high yield of the product, low production cost, clean process, high purity of the product and suitability for industrialization

Characterization and chemical fixation of stainless steel pickling residue using sodium sulfide hydrate.

Abstract: The stainless steel pickling residue (SSPR) produced from the stainless steel industries in China contains large amounts of heavy metals such as chromium (Cr) and nickel (Ni). The study found that the hexavalent chromium Cr (VI) was the primary contributor to the leaching of Cr in the toxicity character leaching test. A chemical fixation with sodium sulfide was used to treat the SSPR, and the response surface methodology (RSM) was employed to optimize the process. The results revealed that the sodium sulfide dose and curing time had significant effects on the fixation of Cr. The higher was the sodium sulfide dose, and the longer the curing time, the lower the leaching concentration of Cr would be. The water addition amount had insignificant effect when it was higher than 70%. A dose of 1.2% sodium sulfide on dry mass basis, a water addition of 90–100%, and a curing time of longer than 10 days in the open air could reduce the leaching of Cr to below the beneficial use threshold. The low chemical dose and simple procedures established in this study make this treatment method cost-effective for rendering the SSPR into a nonhazardous and useful material.