EP 0770062 A4 19990210 - PROCESS FOR THE PREPARATION OF 3-(METHYLTHIO)PROPANAL

Title (en)

PROCESS FOR THE PREPARATION OF 3-(METHYLTHIO)PROPANAL

Title (de)

VERFAHREN ZUR HERSTELLUNG VON 3-(METHYLTHIO)-PROPANAL

Title (fr)

PROCEDE DE PREPARATION DE 3-(METHYLTHIO)PROPANAL

Publication

EP 0770062 A4 19990210 (EN)

Application

EP 95926631 A 19950706

Priority

US 9508532 W 19950706
US 27321694 A 19940711

Abstract (en)

[origin: WO9601810A1] 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.

IPC 1-7

C07C 323/50; C07C 323/51

IPC 8 full level

C07C 323/50 (2006.01); C07C 45/35 (2006.01); C07C 319/18 (2006.01); C07C 323/22 (2006.01); C07C 323/51 (2006.01)

CPC (source: EP KR)

C07C 45/35 (2013.01 - EP); C07C 319/18 (2013.01 - EP); C07C 323/50 (2013.01 - KR); C07C 325/00 (2013.01 - KR)

Citation (search report)

[PX] WO 9429254 A1 19941222 - NOVUS INT INC [US]
See references of WO 9601810A1

Designated contracting state (EPC)

BE DE DK ES FR GB IE IT LU MC NL PT

DOCDB simple family (publication)

WO 9601810 A1 19960125; AU 3093995 A 19960209; AU 699841 B2 19981217; CN 1152913 A 19970625; EP 0770062 A1 19970502; EP 0770062 A4 19990210; JP H10504812 A 19980512; KR 970704681 A 19970906; MX 9700276 A 19970531; PL 318213 A1 19970526; RU 2149159 C1 20000520; TW 296373 B 19970121

DOCDB simple family (application)

US 9508532 W 19950706; AU 3093995 A 19950706; CN 95194068 A 19950706; EP 95926631 A 19950706; JP 50440596 A 19950706; KR 19970700180 A 19970111; MX 9700276 A 19950706; PL 31821395 A 19950706; RU 97102147 A 19950706; TW 84107746 A 19950726