EP0296584A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Removal of halides from carboxylic acids
Assignee: Union Carbide Corp
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Filing: 1988-06-23
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Granted: —
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Expires: 2008-06-23
Abstract
Abstract The present invention relates to a method for producing silver-exchanged macroreticular resins suitable for removing halides from liquid carboxylic acid contaminated with a halide impurity by contacting the liquid halide-contaminated acid with a silver(I)-exchanged macroreticular resin. The halide reacts with the resin-bound silver and is removed from the carboxylic acid stream.
Inventors
- 👤 Jonathan Joshua Kurland
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 23:05
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/47; B; B01; B01J; B01J39/00; B01J39/04; B01J39/05
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
A method of preparing a silver(I)-exchanged resin by adding to a slurry of a cation exchange resin in aqueous carboxylic acid solution, silver oxide to form silver(I)-carboxylate and to bind silver(I)-ions of the silver(I)-carboxylate onto active sites of the resin by ion exchange; and recovering silver(I)-exchanged resin from the slurry.
Claim 2
Independent Claim
50 words
A method of preparing a silver(I)-exchanged resin by adding to a slurry of a cation exchange resin in aqueous carboxylic acid solution, silver oxide to form silver(I)-carboxylate and to bind silver(I)-ions of the silver(I)-carboxylate onto active sites of the resin by ion exchange; and recovering silver(I)-exchanged resin from the slurry.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the cation exchange resin is a macroreticular resin.
Claim 4
Dependent Claim
28 words
The method of claim 1 or 2 wherein the aqueous carboxylic acid solution comprises between 25 and 75 weight percent, preferably between 40 and 60 weight percent acid.
Claim 5
Independent Claim
18 words
The method of claims 1 to 3 wherein the temperature of the slurry maintained betwenn 20°C and 60°C.
Claim 6
Independent Claim
23 words
The method of claims 1 to 4 wherein the carboxylic acid has between 2 and 5 carbon atoms and preferably is acetic acid.
Claim 7
Independent Claim
22 words
The method of claims 1 to 5 wherein the silver(I)-ions are bound onto at least about 10 percent of the active sites.
Claim 8
Independent Claim
31 words
The method of claims 1 to 6 wherein the silver(I)-ions bound onto the active sites have a weight capacity of at least about 0.5 meq per gram of dry, silver(I)-exchanged resin.
Claim 9
Independent Claim
27 words
The method of claims 1 to 7 wherein the resin comprises a macroreticular polystyrene resin crosslinked with divinylbenzene or a sulfonated macroreticular polystyrene resin crosslinked with divinylbenzene.
Claim 10
Dependent Claim
20 words
Use of the silver(I)-exchanged macroreticular resin of claims 1 to 8 for removing halides from a liquid carboxylic acid stream.
References Cited (Backward Citations)
No citation records indexed.
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