Vacuum pyrolysis of scrap tires
AssigneeUniversite Laval
InventorChristian Roy
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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.
Claims15
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,
- which comprises the steps of feeding used rubber tire material into the reactor and pyrolysing said rubber tire material at a temperature in the range of about 360.degree. C. to about 415.degree. C., under a subatmospheric pressure of less than about 35 mm Hg and such that gases and vapors produced in said reactor have a residence time of the order of a few seconds, whereby to increase the yield of said liquid hydrocarbons and lower the yields of said gaseous hydrocarbons and said solid carbonaceous material.
Dependencies are inferred from the claim text.