Title: Recovering anhydrous acrylic acid

Abstract: Acrylic acid practically devoid of water, acrolein, formaldehyde and acetic acid is obtained at particularly low cost by countercurrent scrubbing and quenching of the reaction gas formed in the catalytic oxidation of propylene and/or acrolein with a high-boiling, extremely hydrophobic solvent followed by processing of the extract.

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Inventors: Duembgen, Gerd (Dannstadt, DT)
Engelbach, Heinz (Limburgerhof, DT)
Frey, Walter (Mannheim, DT)
Krabetz, Richard (Kirchheim, DT)
Lebert, Ulrich (Ludwigshafen, DT)
Spitzl, Hermann (Ludwigshafen, DT)
Thiessen, Fritz (Ludwigshafen, DT)
Willersinn, Carl-Heinz (Ludwigshafen, DT)

Application Number: 272551
Filing Date: 1972-07-17
Publication_date: 1976-01-13
Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft (Ludwigshafen (Rhine), DT)
Primary Class(es): 562/600 203/63, 203/68
Other Classes:
US Patent Ref:

2575285	Nov, 1951	Carlson et al.	203/69.
3405172	Oct, 1968	Brown	260/530.
3432401	Mar, 1969	Tcherkawsky	260/526.
3433831	Mar, 1969	Yomiyama	260/526.
3507915	Apr, 1970	Newman	260/526.
3513632	May, 1970	Hess et al.	260/533.
3657332	Apr, 1972	Sennewald	260/526.

Other Refs:
Primary Examiner: Yudkoff, Norman
Assistant Examiner: Sever, Frank
Attorney: Johnston, Keil, Thompson & Shurtleff