Vacuum pyrolysis of scrap tires

Details Vacuum pyrolysis of scrap tires Vacuum pyrolysis of scrap tires

1986-06-19

1988-04-26

Richman, Barry S.

Distillation: processes, thermolytic

Carbonizing under pneumatic pressure or vacuum

201 25, 201 30, 585241, C10B 5300, C10B 5700

Patent

active

047402709

ABSTRACT:
A process for the treatment of used rubber tires by vacuum pyrolysis in a reactor to produce liquid and gaseous hydrocarbons and a solid carbonaceous material is disclosed. According to the invention, the pyrolysis of the tires is carried out at a temperature in the range of about 360.degree. C. to about 415.degree. C., under a sub-atmospheric pressure of less than about 35 mm Hg and such that gases and vapors produced in the reactor have a residence time of the order of a few seconds. The process according to the invention enables one to increase the yield of the liquid hydrocarbons and lower the yields of the gaseous hydrocarbons and solid carbonaceous material, and to thereby produce hydrocarbon oils in substantially maximum yield. These hydrocarbon oils have a high calorific value and are thus suitable for use as heating fuel.

REFERENCES:
patent: 3823223 (1974-07-01), Liska et al.
patent: 4052265 (1977-10-01), Kemp
patent: 4098649 (1978-07-01), Redker
patent: 4118282 (1978-10-01), Wallace
patent: 4150548 (1979-04-01), Kemp et al.
patent: 4235676 (1980-11-01), Chambers
patent: 4250158 (1981-02-01), Solbakken et al.

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