Process for purifying acetic acid and/or acetic anhydride
US5227524A · kind A · utility
21Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/573
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for removing iodide derivatives from liquid acetic acid and/or acetic anhydride comprises contacting the liquid acetic acid and/or acetic anhydride with a strong acid cation exchange resin having from about 4% to about 12% crosslinking, a surface area in the proton exchanged form of less than 10m.sup.2 g.sup.-1 after drying from the water wet state and a surface area of greater than 10m.sup.2 g.sup.-1 after drying from a wet state in which water has been replaced by methanol. The resin has at least one percent of its active sites converted to the silver form preferably from 30 to 70 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.