STUDIES ON THE BACTERIAL METABOLISM OF SULFUR I. FORMATION OF HYDROGEN SULFIDE FROM CERTAIN SULFUR COMPOUNDS UNDER AEROBIC CONDITIONS

1917 ◽  
Vol 2 (5) ◽  
pp. 585-593
Author(s):  
Fred W. Tanner
Keyword(s):  
Hydrogen Sulfide ◽  
Sulfur Compounds ◽  
Bacterial Metabolism ◽  
Aerobic Conditions

Formation of sulfur compounds in the hydrodenitrogenation of piperidine, pyridine, 1-pentylamine and 1-pent-4-enylamine on a nickel-tungsten catalyst in the presence of hydrogen sulfide

1982 ◽  
Vol 47 (3) ◽  
pp. 928-935 ◽  
Author(s):  
Mirko Černý
Keyword(s):  
Hydrogen Sulfide ◽  
Reaction Pathway ◽  
Sulfur Compounds ◽  
Degree Of Conversion ◽  
Favourable Effect ◽  
Nitrogen Compounds ◽  
Pure Hydrogen ◽  
Nickel Tungsten

Hydrogenations of piperidine, pyridine, 1-pentylamine, and 1-pent-4-enylamine were carried out in an autoclave at 300°C on a sulfidized nickel-tungsten catalyst using either pure hydrogen or a mixture of hydrogen with hydrogen sulfide. Hydrogen sulfide was found to raise the degree of conversion of the starting substances and accelerate the hydrodenitrogenation by formation of sulfur compounds; 1-pentanethiol, di(1-pentyl)sulfide, 2-methylthiacyclopentane, thiacyclohexane and other sulfur compounds were detected in the reaction mixtures in the presence of hydrogensulfide. A reaction pathway is suggested of the hydrodenitrogenation of piperidine in the presence of hydrogen sulfide, accounting for the favourable effect of the latter on the hydrodenitrogenation of nitrogen compounds.

scholarly journals The Development of New Methods of Disposal of Processing Sulfur Wastes from a Hydro-carbon Feedstock to various Sulfur Derivatives

2020 ◽  
Author(s):  
Nadezhda Titovna Berberova ◽  
Nadezhda Anatol’evna Pivovarova ◽  
Valentina Nikolaevna Storozhenko ◽  
Elena Vladimirovna Shinkar ◽  
Ivan Vladimorovich Smolyaninov
Keyword(s):  
Hydrogen Sulfide ◽  
Environmental Safety ◽  
Sulfur Compounds ◽  
Low Energy ◽  
Oil Products ◽  
Biologically Active ◽  
New Methods ◽  
Redox Activation ◽  
Hydro Carbon ◽  
Acidic Components

The tendency to reduce the content of sulfur compounds in particular H2S and low molecular thiols (RSH) in oil products sets the task of their extraction and disposal in order to obtain practically useful sulfur compounds. Hydrogen sulfide and thiols can be extracted from hydrocarbon fractions using N-methylpyrrolidone-as selective solvent. Hydrogen sulfide can be extracted from the residual oil products using a low energy exposure such as ultrasound and a constant magnetic field. The releasing gas is concentrated in N-methylpyrrolidone. Further, hydrogen sulfide and mercaptans can be used in the chemical synthesis of biologically active thioethers containing a catechol fragment. Another way of H2S and RSH utilization is the chemical adsorption of acidic components by modified polynuclear pivalate (acetate) zinc(II) silica gel. As a result of the interaction of complexes with H2S and RSH, it is possible to obtain zinc sulfide or zinc thiolates, which can be used in various fields of industry or agriculture. Hydrogen sulfide and thiols can also be applied in the electrochemical or microvaved assisted organic synthesis. This approach is promising from the standpoint of environmental safety of synthesis and low energy costs of the reactions. The SH-functionalization of hydrocarbons (indan, indene, decalin, tetralin, naphthalene and 1,2-dihydronaphthalene) leads to obtain biologically active compounds. Keywords: hydrogen sulfide, thiols, extraction, N-methylpyrrolidone, ultrasonic and magnetic treatment, microwave, redox activation

scholarly journals Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow seas during summer and winter

2020 ◽  
Vol 17 (7) ◽  
pp. 1991-2008 ◽  
Author(s):  
Xi Wu ◽  
Pei-Feng Li ◽  
Hong-Hai Zhang ◽  
Mao-Xu Zhu ◽  
Chun-Ying Liu ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Bottom Water ◽  
Bohai Sea ◽  
Average Concentration ◽  
Sulfur Compounds ◽  
Bacterial Metabolism ◽  
Surface Seawater ◽  
Degradation Rates ◽  
Terrestrial Inputs ◽  
Microbial Consumption

Abstract. Spatiotemporal distributions of dissolved acrylic acid (AAd) and related biogenic sulfur compounds including dimethylsulfide (DMS) and dissolved and total dimethylsulfoniopropionate (DMSPd and DMSPt) were investigated in the Bohai Sea (BS) and Yellow Sea (YS) during summer and winter. AAd and DMS production from DMSPd degradation and AAd degradation were analyzed. Significant seasonal variations in AAd and DMS(P) were observed. AAd exhibited similar distributions during summer and winter; i.e., relatively high values of AAd occurred in the BS and the northern YS, and the concentrations decreased from inshore to offshore areas in the southern YS. Due to strong biological production from DMSP and abundant terrestrial inputs from rivers in summer, the AAd concentrations in the surface seawater during summer (30.01 nmol L−1) were significantly higher than those during winter (14.98 nmol L−1). The average concentration sequence along the transects during summer (AAd > DMSPt > DMS > DMSPd) showed that particulate DMSP (DMSPp) acted as a DMS producer and that terrestrial sources of AAd were present; in contrast, the sequence in winter was AAd > DMSPt > DMSPd > DMS. High values of AAd and DMS(P) were mostly observed in the upper layers, with occasional high values at the bottom. High AAd concentrations in the porewater, which could be transported to the bottom water, might result from the cleavage of intracellular DMSP and reduce bacterial metabolism in sediments. In addition, the production and degradation rates of biogenic sulfur compounds were significantly higher in summer than in winter, and the removal of AAd was primarily attributed to microbial consumption. Other sources of AAd existed aside from the production from DMSPd.

scholarly journals Formation of Comets: Constraints From the Abundance of Hydrogen Sulfide and Other Sulfur Species

1992 ◽  
Vol 150 ◽  
pp. 459-460
Author(s):  
D. Despois ◽  
J. Crovisier ◽  
D. Bockelee-Morvan ◽  
P. Colom
Keyword(s):  
Hydrogen Sulfide ◽  
Sulfur Compounds ◽  
Sulfur Species

Recent determinations of H2S and other sulfur compounds abundances in comets and in Orion KL bring new tests of the origin of cometary matter.

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