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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
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Journal ArticleDOI
TL;DR: Effects of sulfide are analogous to those of other anions, including the substrate hydroxyl group, suggesting that these ions also bridge the Ni and unique Fe.
Abstract: The structure of the active-site C-cluster in CO dehydrogenase from Carboxydothermus hydrogenoformans includes a μ2-sulfide ion bridged to the Ni and unique Fe, whereas the same cluster in enzymes from Rhodospirillum rubrum (CODHRr) and Moorella thermoacetica (CODHMt) lack this ion. This difference was investigated by exploring the effects of sodium sulfide on activity and spectral properties. Sulfide partially inhibited the CO oxidation activity of CODHRr and generated a lag prior to steady-state. CODHMt was inhibited similarly but without a lag. Adding sulfide to CODHMt in the Cred1 state caused the gav = 1.82 EPR signal to decline and new features to appear, including one with g = 1.95, 1.85 and (1.70 or 1.62). Removing sulfide caused the gav = 1.82 signal to reappear and activity to recover. Sulfide did not affect the gav = 1.86 signal from the Cred2 state. A model was developed in which sulfide binds reversibly to Cred1, inhibiting catalysis. Reducing this adduct causes sulfide to dissociate, Cred2 t...

33 citations

Journal ArticleDOI
TL;DR: In this paper, a new approach was developed to obtain high metal adsorption capacity by precipitating metal sulfides with sodium sulfide on the surface of bentonite and adhere them to the absorbent.

33 citations

Journal ArticleDOI
TL;DR: In this article, Tetrabutylammonium bromide was found to be the most efficient catalyst for the system among six catalysts tried, and the effect of the Ω phase on the rate of solid-liquid reaction was also studied.
Abstract: The reactions of benzyl chloride and p-chlorobenzyl chloride with sodium sulfide were carried out both in the solid-liquid and liquid-liquid modes with phase-transfer catalysis. Tetrabutylammonium bromide was found to be the most efficient catalyst for the system among six catalysts tried. In the solid-liquid mode, the reaction was found to be mass transfer controlled with an activation energy of 2.3 kcal/mol, whereas the liquid-liquid reaction was found to be kinetically controlled with an activation energy of 11.3 kcal/mol. The reactivities of benzyl chloride and p-chlorobenzyl chloride were compared under different controlling regimes. The effect of the Ω phase on the rate of solid-liquid reaction was also studied. A maximum rate enhancement by factors of 12 and 57 was obtained for benzyl chloride and p-chlorobenzyl chloride, respectively, with a calculated amount of water compared to no extra water. The importance of mass-transfer resistance was assessed at the maximum rate.

33 citations

Journal ArticleDOI
TL;DR: In this article, the 1-C-nitroglycosyl chloride reacted with the anions form 2-nitropropane, nitromethane, and diethyl malonate, to give the chain-extended products 2 (81%), 5 (72%), and 6 (83%), respectively.
Abstract: The 1-C-nitroglycosyl chloride reacted with the anions form 2-nitropropane, nitromethane, and diethyl malonate, to give the chain-extended products 2 (81%), 5 (72%), and 6 (83%), respectively. Treatment of the 1-C -nitroglycosyl bromide 7 by the lithium salt obtained form 8 gave the dodecodiulose derivative 9 (76%). Th β-D-configuration of 2 and 9 was inferred form their NMR and CD spectra. Treatment of 2 and 9 with sodium sulfide gave the enol ethers 3 (96%) and 10 (92%), respectively. The (Z)-configuration of 10 was deduced form the configuration of its hydrogenation product 11.

33 citations

Patent
28 Apr 1975
TL;DR: In this paper, a mixture of reaction products resulting from the above procedure can be separated to give a petroleum oil product which has been desulfurized and demetallized and has a reduced Conradson carbon content and an increased API gravity relative to the feedstock, and a byproduct of sodium sulfide salt.
Abstract: Sulfur-containing petroleum oil feedstocks which include heavy constituents undergo both desulfurization and hydroconversion by contacting such feedstocks with sodium hydride in the presence of hydrogen, at elevated temperatures. The mixture of reaction products resulting from the above procedure can be separated to give a petroleum oil product which has been desulfurized and demetallized and has a reduced Conradson carbon content and an increased API gravity relative to the feedstock, and a by-product of sodium sulfide salt.

33 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202233
202136
2020107
2019143
2018172