Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1979-03-16
1980-04-01
Doll, John
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260 23, 260563R, 260570D, 260583P, 260584R, 521 63, 521918, 528 44, 528 67, 568613, 568675, C07C 8520, C07C 8526
Patent
active
041961480
ABSTRACT:
A method for hydrolysis of polyurethane foam and recovery of diamines and polyethers (or polyesters) from the hydrolysate carried out near atmospheric pressure and temperatures above about 185.degree. C. in a reaction zone containing water vapor which comprises increasing the rate of diamine production by inclusion of a minor, but effective amount of ammonia in the reaction zone. Volitilized diamines separated from the foam are preferably removed from the reaction zone, e.g. in an overhead stream, while polyethers (or polyesters) separated from the foam are recovered as liquid bottoms from the reaction zone.
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patent: 3478099 (1969-11-01), Ross et al.
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patent: 4025559 (1977-05-01), Johnson
patent: 4039568 (1977-08-01), Sakai et al.
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Wertheim, "Organic Chemistry", third edition, pp. 261, 309 & 310, (1951).
Webster's Third New International Dictionary, p. 180, (1961).
Doll John
Ford Motor Company
Johnson Olin B.
Ross Jr. Edmund C.
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