Organic compounds -- part of the class 532-570 series – Organic compounds – Sulfur containing
Patent
1996-07-11
1998-04-28
Reamer, James H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Sulfur containing
568 38, 568 39, 568 42, C07C32350
Patent
active
057446474
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.
REFERENCES:
patent: 2542768 (1951-02-01), Gresham et al.
patent: 2564105 (1951-08-01), Gresham et al.
patent: 2626282 (1953-01-01), Cunningham et al.
patent: 2676190 (1954-04-01), Bernard et al.
patent: 2776996 (1957-01-01), Hunt et al.
patent: 3438868 (1969-04-01), Sawaki et al.
patent: 3529940 (1970-09-01), Shima et al.
patent: 3574766 (1971-04-01), Meyer et al.
patent: 3833651 (1974-09-01), Ouchi et al.
patent: 3878057 (1975-04-01), Mannsfeld
patent: 4048232 (1977-09-01), Koberstein et al.
patent: 4225516 (1980-09-01), Biola et al.
patent: 4319047 (1982-03-01), Komorn et al.
patent: 5015776 (1991-05-01), Sandler
patent: 5155262 (1992-10-01), Etzkorn et al.
patent: 5183936 (1993-02-01), Etzkorn et al.
patent: 5198578 (1993-03-01), Etzkorn et al.
patent: 5532837 (1996-07-01), Hsu et al.
PCT/US93/08552 International Search Report dated Nov. 17, 1993.
Pierson et al., "Synthesis of DL-Methionine", vol. 70, pp. 1450-1451 (1948).
Hickenbottom, W.J., "Reactions of Organic Compounds", pp. 381-383 (1957).
Hsu Yung C.
Ruest Dennis A.
Novus International, Inc.
Reamer James H.
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