Process for the preparation of 3-(methylthio)propanal

Details Process for the preparation of 3-(methylthio)propanal Process for the preparation of 3-(methylthio)propanal

Filed on

1993-06-08

Date issued

1994-10-04

Examiner

Lone, Werren B.

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Sulfur containing

Other Related Categories

568 38, 568 39, 568 42, C07C32350, C07C32351

Type

Patent

Status

active

Patent number

053528379

Description

ABSTRACT:
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium contains 3-(methylthio)propanal, methyl mercaptan and a catalyst for the reaction between methyl mercaptan and acrolein. The gaseous acrolein feed stream comprises acrolein vapor and non-condensable gas. Acrolein is transferred from the acrolein feed stream to the reaction medium and reacts with methyl mercaptan in that medium to produce a liquid reaction product containing 3-(methylthio)propanal. The non-condensable gas is separated from the liquid reaction product. The reaction product is divided into a product fraction and a circulating fraction, and the circulating fraction is recycled to the gas/liquid contact zone.

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