Decomposition of waste plastics
Patent Information
- Authority / Receiving Office
- US · United States
- Current Assignee / Owner
- ENVION INC
- Publication Date
- 2012-08-30
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
SUMMARY OF THE INVENTION
[0001] Conventional reactors for converting waste plastics into oil, for example, as disclosed in U.S. Pat. Nos. 5,947,721, 5,951,826 and 5,584,969, all use high temperature flue gas to supply the heat required to decompose the plastics into oil. The reactors and processes therein involve some disadvantages. First the heating efficiency of the reactors is not high. The high temperature flue gas transfers the heat to the outer surface of the reactor, and then the outer surface conducts the heat to the plastics in the reactor. Because the heat is not directly transferred to the plastics, the heating efficiency is low. Nevertheless, despite the low heat-conducting efficiency there are serious problems from coking on the inner wall of the reactor. The decomposition of oil usually applies pyrrolysis conditions cure heavy oil to light oil, increasing the efficiency of the light oil. Thus, pyrrolysis is one desirable waste plastic and waste oil reclamation method, as...