Methane to olefins
US7091391B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 19, 2003 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Aug 17, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2527/135
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The specification discloses a process for the production of olefins, including ethylene, propylene and butenes, from methane, the process comprising first, second and third reaction steps operated in tandem. In the first reaction step, hydrogen chloride, perchloroethylene and oxygen are reacted in the presence of a catalyst, using methane as a diluent, to yield hexachloroethane and water. In the second reaction step, the hexachoroethane from the first reaction step is reacted with methane to produce methyl chloride, hydrogen chloride and perchloroethylene. In the third reaction step, the methyl chloride from the second reaction step is reacted to give the desired olefins and hydrogen chloride. By recycling the perchloroethylene from the second reaction step and the hydrogen chloride from both the second and third reaction steps to the first reaction step, a balanced process is achieved that is self-sufficient in chlorine values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.