Process for the continuous high temperature glycolytic cleavage

Details Process for the continuous high temperature glycolytic cleavage Process for the continuous high temperature glycolytic cleavage

1983-08-24

1985-04-16

Clingman, A. Lionel

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

521 49, 528495, 528496, 366 82, B29C 2900, C08J 1100, C08L 7500, B09B 300

Patent

active

045116806

ABSTRACT:
A process for the continuous glycolytic cleavage of polyurethane plastics waste in multi-shaft screw machines by the addition of optionally preheated diols, at a degradation temperature of 250.degree. C., while maintaining a pressure at least such that the polyurethane-diol mixture is in the liquid phase, by the discharge of the glycolysate mixture after short residence times of from 2 to 30 minutes in the reaction screw, and by rapid cooling of the glycolysate mixture.

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Robert J. Sallom and C. C. Duff, Polym.-Plast. Technol. Eng., 1982. 19, (1), pp. 1-20.
Polymer Eng. Sci. 18 (1978), No. 11, p. 846.
SYSpur Rep., 1977, Part 12, pp. 56-65.

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