Cracking process

Details Cracking process Cracking process

1974-08-20

1976-10-12

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

201 25, 201 25, 208128, 208130, 260669R, C07C 328

Patent

active

039858200

ABSTRACT:
A process for cracking thermoplastic polymers to valuable products, primarily their monomers, comprising the following steps:
A. converting the polymer into a liquid or fluidized stage;
B. introducing the polymer from step (a) in droplet or particulate form into a reaction zone and admixing said polymer with a hot inert gas or mixture of hot inert gases in the reaction zone
Wherein the weight ratio of gas to polymer is about 1 to about 8 parts of gas per part of polymer; the temperature of the gas is such as to heat the polymer to a temperature in the range of about 800.degree.C. to about 1050.degree.C.; and the residence time in the reaction zone is about 10 to about 100 milliseconds; and
C. quenching the recovering product.

REFERENCES:
patent: 2461004 (1949-02-01), Soday
patent: 2790838 (1957-04-01), Schrader
patent: 3494958 (1970-02-01), Mannsfeld et al.
patent: 3498753 (1970-03-01), Hokari et al.
patent: 3829558 (1974-08-01), Banks et al.
Straus et al., Journal of Research of the National Bureau of Standards, vol. 66A, No. 5, Sept.-Oct., 1962, p. 406 relied on.

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