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:
Jan. 11, 1977
Filed:
Jan. 27, 1975
Applicant:
Inventors:
Werner Hoerauf, Ludwigshafen, DT;
Ernst Guenther, Ludwigshafen, DT;
Ernst Kissel, Ludwigshafen, DT;
Guenter Valentin, Ludwigshafen, DT;
Ernst Dietrich, Worms, DT;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen (Rhine), DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
2327 / ; 2328 / ; 196 1452 ; 260 / ; 260 / ; 260 / ; 260705 ; 165148 ;
Abstract
An extraction tube for the continuous removal of low molecular weight components of polylactam granules by means of hot water by the countercurrent principle of operation, the water being fed upwardly and the granules downwardly, the tube being provided with inlets and outlets for the granules and the water and exhibiting baffles within the tube, wherein there is provided, within the tube, a heat exchanger which