METHOD OF OBTAINING METHYLMERCAPTANE FROM DIALKYL SULPHIDES AND DIALKYL POLYSULPHIDES Russian patent published in 2013 - IPC C07C319/06 C07C319/08 C07C321/04 

FIELD: chemistry.

SUBSTANCE: invention relates to method of continuous obtaining methylmercaptane by interaction of initial mixture, which contains dialkyl sulphides and dialkyl polysulphides, with hydrogen sulphide. Process is carried out in presence of catalyst based on Al₂O₃, SiO₂, TiO₂, alumosilicates, zeolites, bentonites or alumina, containing, at least, 1 wt % of alkali metal oxide, or catalyst, consisting of said compounds, in reactor with, at least, two separate catalyst-containing zones or in several successively placed reactors, and prevailing part or entire amount of said dialkyl sulphides and/or dialkyl polysulphides together with, at least, part of entire amount of used hydrogen sulphide is supplied into first catalyst-containing zone of reactor, and the remaining amount of hydrogen sulphide and dialkyl sulphides and/or dialkyl polysulphides is dosed into space between catalyst-containing zones, and initial gas mixture can also contain dialkyl ethers, which react with hydrogen sulphide with formation of alkylmercaptanes.

EFFECT: novel method of obtaining alkylmercaptanes with high selectivity is elaborated.

13 cl, 3 dwg, 2 ex