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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17 Dec 2003TL;DR: In this paper, an apparatus for extracting sulfur compounds from a hydrocarbon stream is described, with a prewash section for converting hydrogen sulfide to sodium sulfide by reaction with an alkali such as caustic.
Abstract: Disclosed is an apparatus for extracting sulfur compounds from a hydrocarbon stream. A prewash section for converting hydrogen sulfide to sodium sulfide by reaction with an alkali such as caustic prepares the hydrocarbon stream for extraction. Spent alkali is continuously withdrawn and regenerated alkali is continuously added to the prewash section.
15 citations
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TL;DR: The high sulfate concentration of seawater, the low oxidation-reduction potential under hydrogen-producing conditions, and the presence of electron donors such as acetate might promote the metabolic activities of sulfate-reducing bacteria, resulting in the deterioration of hydrogen production with seawater.
Abstract: The application of seawater for bacterial fermentative production is a cost-effective technology. Hydrogen production by marine photosynthetic bacterium with seawater failed to continue after more than 10 days, and was accompanied by the formation of hydrogen sulfide and a change in culture color from red to black. However, substrate consumption in the blackish culture was comparable to that in a hydrogen-producing culture. A decrease in hydrogen production occurred upon the addition of sodium sulfide at concentrations of 1.5 mM or higher. PCR analysis targeted at the 16S rDNA sequence selective for sulfate-reducing bacteria revealed the existence of sulfate-reducing bacteria in inoculation cultures of the phototrophic bacterium and medium for hydrogen production. Hence, the high sulfate concentration of seawater, the low oxidation-reduction potential under hydrogen-producing conditions, and the presence of electron donors such as acetate might promote the metabolic activities of sulfate-reducing bacteria, resulting in the deterioration of hydrogen production with seawater.
15 citations
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15 citations
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20 Dec 2013
TL;DR: In this article, a chemical process captures and converts hydrogen sulfide (H 2 S) gas into elemental sulfur, polysulfide, sulfur dioxide and/or sulfuric acid while regenerating a capture agent for further use in an initial H 2 S capture step.
Abstract: A chemical process captures and convert hydrogen sulfide (H 2 S) gas into elemental sulfur, polysulfide, sulfur dioxide and/or sulfuric acid while regenerating sodium hydroxide capture agent for further use in an initial H 2 S capture step. Processing may include initial sodium hydroxide scrubbing of gas streams containing H 2 S, electrochemical regeneration of the sodium hydroxide from sodium hydrosulfide or sodium sulfide, recovery of sulfur and/or sulfur dioxide from the electrochemical processing, and production of sulfuric acid from such sulfur and/or sulfur dioxide.
15 citations
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TL;DR: A copper-catalyzed procedure was developed for assembling benzothiazolones from ethyl 2-iodophenyl carbamates and sodium sulfide as discussed by the authors, and a number of functional groups, such as methoxy, acyl, amide, carboxylate, trifluoromethyl, fluoro, and chloro, were tolerated under these conditions, providing a good yield.
15 citations