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.

Ready-to-use lead sulfide catalyst

Abstract: ALREADY-TO-USE LEAD SULFIDE CATALYST FOR USE IN THE BENDER (A REGISTERED TRADEMARK) SWEETENING PROCESS OF SOUR PETROLEUM PRODUCTS. THE LEAD SULFIDE CATALYST COMPRISES A CARRIER OF PARTICULATE INERT SOLIDS AND A RELATIVELY DRY EXPOSED COATING RESIDING ABOUT THE EXTERIOR SURFACE OF THE SOLIDS THE COATING IS FORMED OF A MIXTURE OF SODIUM SULFIDE AND LEAD OXIDE REACTED IN THE PRESENCE OF AN AQUEOUS SOLUTION OF SODIUM SILICATE BINDER, PREFERABLY THE SODIUM SULFIDE IS INTRODUCED IN A STOICHIOMETRIC AMOUNT RELATIVE TO THE LEAD OXIDE IN THE MIXTURE. THE CATALYST CAN BE PROTECTED FROM OXIDIZING GASES OR MOISTURE BY A HYDROCARBON SOLUBLE COVERING ENCLOSING THE COATING ON THE CARRIER. FOR EXAMPLE THE COATING MAY BE A HIGH-MELTING POINT NATURAL, PETROLEUM OR SYNTHETIC WAX.

Stabilized liquid preparation for injection containing pemetrexed

Abstract: The present invention relates to a stabilized liquid preparation for injection containing pemetrexed or a pharmaceutically acceptable salt thereof, and more particularly, to a liquid preparation for injection containing pemetrexed, which has improved stability as it comprises one or more types of stabilizing agent(s) selected from sodium sulfide and sodium sulfite. [Representative figure:] Fig. 1.

A process for separation and purification of sodium sulfide

Abstract: The present disclosure provides a method for isolation and purification of sodium sulfide (Na2S) formed during desulfurization of petroleum residue. The process involves treating a sludge containing Na2S obtained during desulfurization of petroleum residue with a mixture of at least one organic solvent and water.

Synthesis of ZnS Nanoflowers by Composite-Hydroxide-Mediated Approach

Abstract: Zinc sulfide nanoflowers are synthesized by the composite-hydroxide-mediated (CHM) method, using molten composite hydroxides as a reaction solvent, sodium sulfide and zinc nitrate hexahydrate as reactants at temperature of 200 °C in the absence of organic dispersant or capping agents. The XRD spectrum of the as-synthesized sample indicates a cubic ZnS with lattice group \(F\bar{4}3m[216]\) and lattice constant a=5.318 A. The scan electron microscopy and transmission electron microscopy display its good crystallization and flower shape with diameter of 800–1000 nm. The photoluminescence results reveal that the ZnS nanocrystal has a band gap of 3.4 eV. The strong blue emission centered at 440 nm demonstrates the existence of defect states. This CHM approach provides a useful route for the synthesis of ZnS crystals, which may be extended to synthesize other II–VI semiconductors.

A New Synthetic Method for Substituted 2,4-Dihydro-3H-1,2,4-triazol-3-ones and 3-thiones via 1,4-Dialkyl-5-phenylthio-1H-1,2,4-triazolium Salts

Abstract: Novel 2,4-di- and 2,4,5-trialkyl-2,4-dihydro-3H-1,2,4-triazol-3-ones and 2,4-dialkyl-2,4-dihydro-3H-1,2,4-triazole-3-thiones were prepared by the reaction of 1,4-dialkyl-5-phenylthio-1,2,4-triazolium salts with aqueous potassium carbonate or sodium sulfide in DMF, respectively.