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:
May. 04, 1982
Filed:
May. 05, 1980
Applicant:
Inventors:
Robert J Salloum, Troy, MI (US);
Clifford C Duff, Warren, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C09B / ; C07C / ; C07C / ; C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
564393 ; 560 26 ; 560 91 ; 560198 ; 564305 ; 564330 ; 564414 ; 564452 ; 564463 ; 564487 ; 564488 ; 564511 ; 568613 ; 568620 ; 568621 ; 568624 ; 568675 ; 568716 ; 568840 ; 568851 ; 568852 ; 568853 ; 203 95 ; 2604 / ; 2604 / ; 260704 ; 260705 ; 264 37 ; 422232 ; 422239 ; 521 53 ; 521 63 ; 521918 ;
Abstract
A method if provided for continuously hydrolyzing urethane foam in a vertically oriented hydrolysis reactor. In a preferred practice, a bed of foam particles is formed in the reactor. Superheated steam is flowed continuously upward through the bed at a temperature and rate such that only the foam particles then adjacent the bottom of the reactor are hydrolyzed and the bulk of the bed is not fluidized. Unreacted steam heats the unhydrolyzed foam. Liquid hydrolysis products are drained as they are formed to prevent hydrolysis-impeding liquid saturation of unhydrolyzed particles.