No abstract

The presence of hydrogen sulfide in fuel oil is a danger, since hydrogen sulfide is concentrated in the gas phase of tanks, vessels and tanks truck that when carrying out operations of drainage-fulness can lead to an excess of its MAC in air and to the creation of explosive mixtures. The concentration of H2S in fuel oil produced at refineries is 20-500 ppm, while its content in commercial fuel is limited to 10 ppm. Analytical methods of definition of concentration of a hydrogen sulfide in oil products are considered. Industrial and promising technologies for reducing H2S in fuel oil, their main merits and demerits are presented. The possibilities of low-energy wave technologies in the refinement of petroleum and oil products and mechanisms of action of ultrasound and constant magnetic field on oil disperse systems are shown. The hydrogen sulfide extracted from fuel oil neither on volumes, nor on concentration can't be used as independent raw materials for processing into elemental sulfur in the Claus process and is a toxic by-product. At the same time, hydrogen sulfide-containing wastes can serve as valuable raw materials for the production of wide range of useful organic compounds (antioxidants, drugs, pesticides, fungicides) in electrochemical processes. In processes of low-tonnage chemistry, electrochemical processes are relevant. As a result of anode or cathode activation of a hydrogen sulfide (alkanethiols) at ambient temperature and atmospheric pressure the thiyl (alkylthiyl) radical is formed. Along with products of a thiolation of organic compounds are formed also mono - di - and the trisulphides having higher biological activity and lower toxiferous in comparison with thiols. The competitiveness of electrosynthesis is very high, it is considered as processes of waste-free production as at the heart of it ecologically focused idea of "green chemistry" is concluded.

No abstract

No abstract