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:
Dec. 06, 1994
Filed:
Jul. 15, 1993
Applicant:
Inventors:
Stefan Sipos, Bremen, DE;
Gary Jones, Stettlen, CH;
Assignee:
Jacobs Suchard AG, Zurich, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544275 ; 544274 ;
Abstract
The invention relates to a process for recovering caffeine from caffeine-loaded activated carbon using a circulated inert gas sweeping stream held at a temperature of 250.degree. to 460.degree. C., in which process the activated carbon is preheated prior to the desorption of the caffeine with heat sources other than the sweeping gas and held during the desorption step at a uniform temperature or at a temperature increasing from the inlet to the outlet of the inert gas sweeping stream within the range of 250.degree. to 460.degree. C. and the caffeine is subsequently separated from the inert gas sweeping stream by conventional means.