Nitroacetophenon to Aminoacetophenon by H2s-Rich Aqueous Methyldiethanolamine A Novel Process for Utilization of H2s-Laden Gas Streams Using Tetrabutylphosphonium Bromide as Phase Transfer Catalysis

Abstract

Industrialisation & environmental pollution are two faces of a coin. To reduce the negative impact of pollution chemical research & engineering has accepted green chemistry to minimize use & generation of hazardous substance. This thesis is regarding the economical use of hazardous substance H2S, generally found in a lot of industrial process with flue gas, by a method involving sustainable chemistry.H2S gas possess quite serious threat to health issue depending on the time exposed to hydrogen sulphide & concentration of the hydrogen sulphide you breathe. It causes slight irritation/ burning of eyes, suffocation & even knockdown.So refineries have constantly making effort for a better economical green chemistry method to treat sour gas by-product streams in industry. Presently in industry Claus process is the most efficient desulphurization process in recovering elemental sulphur. But elemental sulphur is not a good economical product as its only use is production of sulphuric acid followed by fertilizer & stripping of H2S from alkanolamine costs a lot. So the idea behind this project is to bargain a substitute for Claus process. The present study involves synthesis of aminoacetophenon using H2S rich aq. n-methyldiethanolamine in the presence of PTC, tetrabutylphosphonuim bromide & also kinetic study of effect of variations of temperature, stirring speed, catalyst loading, reactant concentration & sulfide concentration. The application of aminoacetophenon are manufacturing of products with commercial importance like synthesis of variety pharmaceutical products, synthesis of new effective catalysts for various process, pesticide, HPCL silica monolith, preparation of unnatural amino alcohol, bee repellents, Immobilization of E. Coli & much more small uses like Spectrophotometric determination of isoproturon etc. from hydrogen sulphide instead of converting into elemental sulphur or disulphide. Thus hydrogen sulphide gas is utilized in a better economical way.