Method of purifying hydrogen chloride gas
US4018880A · kind A · utility
5Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1974 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Nov 25, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/0725
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a method of purifying hydrogen chloride gas containing small quantities of chlorine. The purifying method comprises passing impure hydrogen chloride over carbon, at a temperature from 30.degree. to 200.degree. C, in the presence of at least one olefin, possibly containing chlorine. The method of the invention applies particularly to the hydrogen chloride obtained from a chloroethane cracking operation initiated by chlorine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.