Abstract
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
Highlights
The increase of environmental requirements for the content of sulfur-containing compounds in oil products, in particular hydrogen sulfide and low molecular weight alkanethiols (RSH), causes an urgent need to develop new and energy-efficient ways of their utilization
There are no methods aimed at using waste (H2S and RSH) as key reagents in the synthesis of various sulfur compounds
In this study it is proposed for the first time to apply a multitarget approach to the refinement of light hydrocarbon fractions or residual petroleum products, followed by their utilization in practically useful organosulfur compounds
Summary
The increase of environmental requirements for the content of sulfur-containing compounds in oil products, in particular hydrogen sulfide and low molecular weight alkanethiols (RSH), causes an urgent need to develop new and energy-efficient ways of their utilization. The application of these approaches does not lead to the production of practically useful sulfur-containing compounds, and in some cases these wastes are burned or discharged into the atmosphere. In this study it is proposed for the first time to apply a multitarget approach to the refinement of light hydrocarbon fractions or residual petroleum products (fuel oil), followed by their utilization in practically useful organosulfur compounds (see Figure 1).
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