Depolymerization method for resource recovery from polymeric was

Details Depolymerization method for resource recovery from polymeric was Depolymerization method for resource recovery from polymeric was

1992-04-06

1993-11-23

Thurlow, Jeffery

Chemistry of hydrocarbon compounds

Production of hydrocarbon mixture from refuse or vegetation

From synthetic resin or rubber

201 25, 241DIG37, 264 28, 264349, 264DIG69, 264130, 264 83, 425DIG44, C07C 404, C07C 406

Patent

active

052646408

ABSTRACT:
Scrap rubber chunks from used tires are processed and the monomeric chemicals from which the tire rubber was synthesized are recovered. Rubber chunks reduced to a finely divided size are exposed to gaseous ozone to break down the cross-linked structure of the rubber. Subsequent thermal depolymerization occurs in a reactor chamber. Finely divided silica is introduced within the reactor to prevent agglomeration of rubber particles and to enhance the maintenance of a uniform reactor temperature. Reduced pressure within the reactor permits rapid removal of monomer vapors. Once the monomer vapors are separated, silica and carbon residues are recovered separately for either recycle or disposal.

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