Vacuum pyrolysis of scrap tires
US4740270A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Jun 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/143
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.