The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1976
Filed:
Apr. 21, 1975
Applicant:
Inventors:
Gerd Wilhelm, Norf, DT;
Karl Hurm, Dormagen, DT;
Rolf-Burkhard Hirsch, Dormagen, DT;
Artur Jaschke, Cologne, DT;
Herbert Marzolph, Dormagen, DT;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; C08F / ;
U.S. Cl.
CPC ...
203 89 ; 202236 ; 159 / ; 159 49 ; 159 / ; 159D / ; 526328 ; 526341 ; 526342 ; 526501 ;
Abstract
The invention relates to a process for the recovery of acrylonitrile and other monomers from an aqueous polymer dispersion by continuous distillation in a thin-layer evaporator under reduced pressure, condensation of the evaporated monomers in a condenser under the same or similar reduced pressure and subsequent condensation or absorption respectively of the monomer vapors which have not been condensed in the condenser at a higher pressure.