METHOD FOR UNINTERRUPTED PRODUCTION OF 3-(METHYLTHIO)PROPANAL Russian patent published in 1998 - IPC

FIELD: organic chemistry. SUBSTANCE: method is carried out by contact of liquid reaction medium comprising 3-(methylthiopropanal) with origin stream of gaseous acrolein and by interaction of methyl mercaptan with acrolein. The process takes place in the presence of catalyst in the zone of gas/liquid contact. Reaction medium comprises 3-(methylthio) propanal, methylmercaptan and mentioned above catalyst. Origin stream of gaseous acrolein comprises acrolein, non-condensed gas and not more than 80 % of vapor. During mentioned above processes acrolein is converted from origin stream into reaction medium. Therein acrolein interacts with methylmercaptan to prepare liquid reaction product comprising 3-(methylthio)propanal. Non-condensed gas is separated of liquid reaction product. Then reaction product is separated into fraction and circulating fraction, the latter recycled into zone of gas/liquid contact. EFFECT: improved efficiency of the method. 27 cl, 5 dwg, 5 tbl