Organic sulfur compounds from fatty aldehydes, hydrogen sulfide, thiols, and ammonia as flavor constituents

1974 ◽  
Vol 22 (6) ◽  
pp. 1071-1076 ◽  
Author(s):  
Mans. Boelens ◽  
Leendert M. Van der Linde ◽  
Pieter J. De Valois ◽  
Hans M. Van Dort ◽  
Henk J. Takken
Keyword(s):  
Hydrogen Sulfide ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds ◽  
Fatty Aldehydes

High Temperature Corrosion By Catalytically Formed Hydrogen Sulfide

CORROSION ◽  
1962 ◽  
Vol 18 (8) ◽  
pp. 291t-298t ◽  
Author(s):  
A. S. COUPER ◽  
ANDREW DRAVNIEKS
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Sulfide ◽  
High Temperature ◽  
Surface Concentration ◽  
High Temperature Corrosion ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds ◽  
Steel Surfaces ◽  
Formed Hydrogen

Abstract Organic sulfur compounds are known to be a major cause of high-temperature corrosion in refining processes. Chromium steels are widely used in such environments. The required chromium content for adequate resistance depends upon the chemical form of sulfur encountered. Surfaces of corroding metals can act as catalysts in forming hydrogen sulfide, either from hydrogen and sulfur or by decomposition of organic sulfur compounds. Catalytically formed H2S is more corrosive than the same concentration of other H2S and can be corn-batted by adding chromium to the steel. Because corrosion is proportional to the concentration of H2S, a surface concentration of H2S is postulated as proportional to the catalytic activity of the surface. Laboratory tests on sulfur vapor mixed with hydrogen and on amyl mercaptan mixed with nitrogen or hydrogen indicate that corrosion is proportional to the yield of catalytically formed H2S. Chromium additions to the steel, oxide scales on the metal surfaces, additions of chlorides to the stream, and increased velocity decreased both H2S yields and corrosion, whereas increased temperatures and addition of oxidizing agents caused increases. Further work should be done to develop practical methods to reduce the catalytic activity of corroding steel surfaces, thereby improving corrosion resistance to certain high-temperature streams that contain sulfur compounds. 3.4.2, 4.4.9, 3.5.9, 3.7.2, 8.4.3

scholarly journals Logical-Information Model of Energy-Saving Production of Organic Sulfur Compounds from Low-Molecular Sulfur Waste Fuel Oil

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5286
Author(s):  
Valery Meshalkin ◽  
Elena Shinkar ◽  
Nadezhda Berberova ◽  
Nadezhda Pivovarova ◽  
Foat Ismagilov ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Technological Process ◽  
Energy Resource ◽  
Sulfur Compounds ◽  
Fuel Oil ◽  
Alternative Methods ◽  
Organic Sulfur ◽  
Resource Saving ◽  
Technological Processes ◽  
Organic Sulfur Compounds

A logical-informational model of energy resource-efficient chemical technology for the utilization of hydrogen sulfide and low molecular alkanethiols, which are toxic and difficult to remove sulfur components of residual fuel (fuel oil), is proposed. Based on the IDEF1 methodology and existing knowledge about the technological processes of the demercaptanization of various hydrocarbon raw materials (oils, gas condensates), a scheme for the production of organic sulfur compounds from sulfur waste extracted from fuel oil has been modeled. For a sufficiently complete removal of hydrogen sulfide and low molecular weight alkanethiols, energy- and resource-saving stages of the technological process have been developed, which are implemented by ultrasonic and/or magnetic treatment of fuel oil. It is proposed to use the combined action of two alternative methods of processing fuel oil to increase the efficiency of cleaning fuel oil from sulfur components. For the first time, an approach has been developed to utilize unwanted sulfuric impurities contained in fuel oil by involving electric and microwave synthesis in green technological processes, to obtain practically useful organic sulfur compounds with biological activity. It is shown that the use of one-electron oxidant thiols and hydrogen sulfide in organic media leads to the synthesis of organic disulfides and elemental sulfur. Indirect (with the use of mediators) electrosynthesis contributes to the cyclic conduct of the technological process, an increase in efficiency and a decrease in energy consumption compared to the direct (on electrodes) initiation of sulfur components.

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