3-(METHYLTHIO)PROPANAL PRODUCTION PROCESS Russian patent published in 2001 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: according to invention, contact of liquid reaction mixture with gaseous acrolein feedstock stream is accomplished in gasliquid contact zone. Reaction mixture includes 3-(methylthio)propanal and methylmercaptan-acrolein interaction catalyst. Gaseous acrolein feedstock includes acrolein vapors and non-condensable gas. Acrolein passes from acrolein feedstock stream into reaction mixture. Methylmercaptan is introduced into reaction mixture to interact with acrolein thereby to form liquid reaction product containing 3-(methylthio)propanal. Non-condensable gas is separated from liquid reaction product. The latter is then separated into product fraction and recycle fraction returned into gas-liquid contact zone. EFFECT: enabled formation of product pure enough to be directly used in methionine synthesis. 19 cl, 9 dwg, 5 tbl, 32 ex