Preparation of beta-methylthiopropionaldehyde

Details Preparation of beta-methylthiopropionaldehyde Preparation of beta-methylthiopropionaldehyde

1980-07-02

1982-03-09

Lone, Werren B.

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

Organic compounds

Sulfur containing

568458, C07C15100

Patent

active

043190472

ABSTRACT:
Beta-methylthiopropionaldehyde is prepared by (I) condensing a gaseous feedstream comprising both acrolein and water, advantageously the off-gas resulting from the air oxidation of propylene (and after the acrylic acid content has been absorbed therefrom), to obtain an aqueous condensate containing a fraction of said acrolein and a gaseous acrolein effluent, (II) partially vaporizing said aqueous condensate whereby to obtain a gaseous phase comprising essentially all of said acrolein fraction and a liquid phase comprising essentially no acrolein, (III) recycling said gaseous phase into said gaseous feedstream to be condensed, and (IV) directly reacting said gaseous acrolein effluent with methylmercaptan.

REFERENCES:
patent: 2626282 (1953-01-01), Cunningham et al.
patent: 3574766 (1971-04-01), Megee
patent: 4225516 (1980-09-01), Biola

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