Purification of anhydrous hydrogen chloride
US4927621A · kind A · utility
7Cited by
8References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method to purify impure gaseous hydrogen chloride containing an unsaturated chlorinated hydrocarbon contaminant in an amount less than that necessary to inhibit purification, comprising exposing the impure hydrogen chloride to an ultraviolet light source in the presence of gaseous chloride for a sufficient time for the gaseous chloride to react with organic impurities in the hydrogen chloride to form heavier organic compounds and thereafter separating the heavier compounds from the hydrogen chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.