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US 4,225,516 AGranted
Process for the manufacture of beta-methylthiopropionaldehyde
AssigneeRhone-Poulenc Industries
InventorsGeorges Biola, Yves Komorn, Eric Limongi
Life of this patent
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Abstract
Beta-methylthiopropionaldehyde is prepared from methylmercaptan and an acrolein-containing gaseous mixture derived as an off-gas from the catalytic oxidation of propylene.
Claims16
A method for producing beta-methylthiopropionaldehyde from methylmercaptan and an acrolein-containing gas comprising the steps of:
- (a) absorbing acrolein in a feedstream of betamethylthiopropionaldehyde;
- and,
- (b) reacting the mixture (a) with methylmercaptan in the substantial absence of water at a temperature within the range of from about 10.degree. C. to about 50.degree. C., wherein the reaction is accompanied by the formation of hemithioacetal as an intermediate.
Dependencies are inferred from the claim text.