Topic
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•
01 Feb 1967
TL;DR: The Stilbene AZO as mentioned in this paper has shown excellent soluability in COLD WATER by heating P-NITROTOLUENE-O-SULFONIC ACID in the presence of an AQUEOUS CAUSTIC ALKALI and REDUCING the response of the reaction.
Abstract: PRODUCTION OF STILBENE AZO DYES HAVING EXCELLENT SOLUBILITY IN COLD WATER BY HEATING P-NITROTOLUENE-O-SULFONIC ACID IN THE PRESENCE OF AN AQUEOUS CAUSTIC ALKALI AND REDUCING THE RESULTANT REACTION MASS CONSISTING ESSENTIALLY OF 4,4''-DINITRO-2,2''-STILBENE DISULFONIC ACID OR AN ALKALI METAL SALT THEREOF WITH SODIUM SULFIDE IN AMOUNT FROM ABOUT 5 TO 15%, BY WEIGHT, OF THE P-NITROTOLUENE-O-SULFONIC ACID EMPLOYED.
6 citations
TL;DR: In this paper, a novel chemical approach to prepare the high performance polymer poly(phenylene sulfide sulfone) under mild conditions was presented based on 4,4-difluorodiphenylsulfone and sodium sulfide (Na2S) in i-pmim PF6 (IL)/MImBS (ZI) at atmospheric pressure and compared with conventional methods.
Abstract: A novel chemical approach to prepare the high performance polymer poly(phenylene sulfide sulfone) under mild conditions was presented based on 4,4-difluorodiphenylsulfone and sodium sulfide (Na2S) in i-pmim PF6 (IL)/MImBS (ZI) at atmospheric pressure and compared with conventional methods. The highest molecular weight (2.5 × 104) and yield (>99%) polymers were synthesized in IL/ZI in the presence of sodium carbonate and sodium hydroxide at 200 °C for 4 h. ZI can significantly improve solubility of the basic inorganic salt Na2S. And using ILs as solvents made removing toluene by purging with nitrogen much easier and the time was shortened significantly from 5–8 min to 1–2 min. In addition, the ILs can be recycled easily and still possess excellent performance.
6 citations
TL;DR: In this article, a cyclophane ring-cleaved product was obtained by the reaction of di(bromomethyl) 2 with sodium sulfide under phase-transfer-catalysed conditions.
6 citations
Patent•
27 Jul 1988TL;DR: In this article, a method of passivation of Hg 1-x Cd x Te and similar semiconductors by surface oxidation (such as anodic) followed by chemical conversion of the oxide to either sulfide or selenide or a combination of both is disclosed.
Abstract: A method of passivation of Hg 1-x Cd x Te and similar semiconductors by surface oxidation (such as anodic) followed by chemical conversion of the oxide to either sulfide or selenide or a combination of both is disclosed. Preferred embodiments provide sulfide conversion by immersion of the oxide coated Hg 1-x Cd x Te in a sodium sulfide solution in water with optional ethylene glycol and the selenidization by immersion in a solution of sodium selenide plus sodium hydroxide in water and ethylene glycol. Also, infrared detectors incorporating such sulfide and selenide passivated Hg 1-x Cd x Te are disclosed.
6 citations
TL;DR: In this paper, the effect of the precipitation conditions on the surface stoichiometry of lead sulfide has not been studied in detail, although there seems to be a general agreement that the surface chemical properties of precipitated lead sulfides depend on the surfaces of the precipitate.
6 citations