Cracking process
US3985820A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1974 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Aug 20, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for cracking thermoplastic polymers to valuable products, primarily their monomers, comprising the following steps: A. converting the polymer into a liquid or fluidized stage; B. introducing the polymer from step (a) in droplet or particulate form into a reaction zone and admixing said polymer with a hot inert gas or mixture of hot inert gases in the reaction zone Wherein the weight ratio of gas to polymer is about 1 to about 8 parts of gas per part of polymer; the temperature of the gas is such as to heat the polymer to a temperature in the range of about 800.degree.C. to about 1050.degree.C.; and the residence time in the reaction zone is about 10 to about 100 milliseconds; and C. quenching the recovering product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.