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.
Papers published on a yearly basis
Papers
More filters
Patent•
07 Aug 1972
TL;DR: In this article, the antimony halide catalyst used in the production of chlorofluoroalkane by the fluorination of chloroalkane is treated with water or mineral acid, and the organic layer is separated out of the aqueous layer which contains antimony value.
Abstract: Spent antimony halide catalyst used in the production of chlorofluoroalkane by the fluorination of chloroalkane is treated with water or mineral acid, and the organic layer is separated out of the aqueous layer which contains antimony value. The aqueous layer is treated with a metal such as iron, manganese, copper, zinc, tin, or their salts, or alternatively treated with hydrogen sulfide, sodium sulfide or ammonium sulfide, to precipitate antimony compounds.
10 citations
TL;DR: It was revealed, in particular, that the negatively-charged interfaces of the dense liquid species critically impede their fusion into large enough dense droplets in which nucleation can take place.
Abstract: Previously, we found a series of fluid nanoscale intermediates preceding nucleation of gold sulfide in the reaction between aqueous HAuCl4 and sodium sulfide. Here, the effects of temperature, addition of an inert electrolyte and some other factors on characteristics of the “dense liquid” intermediates and the formation of solid nuclei were studied using UV-vis absorption spectroscopy, DLS, zeta-potential measurements, and SAXS. It was revealed, in particular, that the negatively-charged interfaces of the dense liquid species critically impede their fusion into large enough dense droplets in which nucleation can take place. The nucleation and following coagulation of poorly crystalline gold sulfide proceed not instantly but progressively as the dense liquid droplets arise, with the process being sharply accelerated by the injection of NaCl or temperature increase.
10 citations
TL;DR: In this article, the electrochemical reactions of a copper electrode in Na 2 S solutions were studied using cyclic voltammetry, potentiostatic and galvanostatic measurements, in addition surface examination and morphological studies were applied using scanning electron microscopy (SEM), energy dispersive analysis of X-rays (EDAX).
10 citations
TL;DR: In this article, a poly(1,4-oxylylenethioether) was synthesized from 2,5-disubstituted-1, 4-bis(chloromethyl)-benzenes and sodium sulfide under phase-transfer conditions.
Abstract: Poly(1,4-oxylylenethioethers) were synthesized from 2,5-disubstituted-1,4-bis(chloromethyl)-benzenes and sodium sulfide under phase-transfer conditions. The polythioethers were characterized by elemental analysis and infrared spectroscopy. The effect of the catalyst, solvent, and temperature were studied. Their glass transition temperature and thermal decomposition were determined.
10 citations
TL;DR: In this article, the impacts of low concentrations of aqueous hydrogen sulfide (H2S) can stimulate growth of some crops, but it is not clear whether H2S provides crops with only sulfur and whether other sulfur compounds have similar beneficial effects.
Abstract: Low concentrations of aqueous hydrogen sulfide (H2S) can stimulate growth of some crops. However, it is not clear whether H2S provides crops with only sulfur and whether other sulfur compounds have similar beneficial effects. Therefore, impacts of solutions of sodium sulfate (Na2SO4), sodium sulfite (Na2SO3), sodium sulfide (Na2S), ferrous sulfide (FeS), and H2S at 0.01–1 mM were assessed on 5-day lettuce seed germination. Results showed that 0.01 mM H2S solution significantly increased lettuce shoot elongation by 40 percent (to 43.6 mm from 31.0 mm in the control), whereas 0.1 mM increased elongation by 24 percent to 38.5 mm. Only a slight 10 percent increase was observed in 0.1 mM Na2SO4, suggesting that ameliorative impact of H2S on plant growth was not a result of providing sulfur nutrient. Other sulfur solutions, however, inhibited lettuce germination and elongation to varying extents, hinting that H2S might work as a signal molecule in regulating plant cellular activities.
10 citations