Process and composition for drying of gaseous hydrogen halides
US4853148A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1987 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Mar 24, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S34/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for drying a gaseous hydrogen halide of the formula HX, wherein X is selected from the group consisting of bromine, chlorine, fluorine, and iodine, to remove water impurity therefrom, comprising: contacting the water impurity-containing gaseous hydrogen halide with a scavenger including a support having associated therewith one or more members of the group consisting of: PA1 (a) an active scavenging moiety selected from one or more members of the group consisting of: PA2 (i) metal halide compounds dispersed in the support, of the formula MX.sub.y ; and PA2 (ii) metal halide pendant functional groups of the formula -MX.sub.y-1 covalently bonded to the support, PA1 wherein M is a y-valent metal, and y is an integer whose value is from 1 to 3; PA1 (b) corresponding partially or fully alkylated compounds and/or pendant functional groups, of the metal halide compounds and/or pendant functional groups of (a); wherein the alkylated compounds and/or pendant functional groups, when present, are reactive with the gaseous hydrogen halide to form the corresponding halide compounds and/or pendant functional groups of (a); and M being selected such that the heat of formation, .DELTA.H.…
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