EP0482787A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for removing iodide compounds from carboxylic acids and/or their anhydrides
Assignee: BP PLC
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Filing: 1991-10-08
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Granted: —
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Expires: 2011-10-08
Abstract
Abstract A process for removing iodide compounds from a liquid carboxylic acid, such as acetic acid and/or its corresponding carboxylic acid anhydride by contacting the liquid with an ion exchange resin having functional groups which each have at least one sulphur donor atom and at least one percent of which are occupied by silver, palladium and/or mercury. Suitable resin functional groups include thiol and substituted thiol groups.
Inventors
- 👤 Michael David Jones
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 11:40
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/573; C07C53/00; C07C51/42; C07C51/47
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A process for removing iodide compounds from a liquid carboxylic acid having 2 to 6 carbon atoms and/or its corresponding carboxylic acid anhydride characterised in that the process comprises contacting the liquid with an ion exchange resin having functional groups which each have at least one sulphur-donor atom and which resin has at least 1% of its sulphur-donor functional groups occupied by silver, palladium and/or mercury.
Claim 2
Dependent Claim
25 words
A process as claimed in claim 1 characterised in that the carboxylic acid is acetic acid and the corresponding carboxylic acid anhydride is acetic anhydride.
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1 or claim 2 characterised in that the resin has thiol or substituted thiol functional groups.
Claim 4
Dependent Claim
28 words
A process as claimed in claim 3 characterised in that the thiol groups comprise -SH groups, aliphatic thiol groups, aryl thiol groups, alicyclic thiol groups and/or thiouronium groups.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 4 characterised in that the thiol groups have the formula: -SH;
Claim 6
Dependent Claim
20 words
A process as claimed in claim 3 characterised in that the substituted thiol groups comprise isothiouronium groups or thiadiazole groups.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 6 characterised in that the substituted thiol groups have the formula (I), (II) or (III): where - A is - NH₂ or - SH
Claim 8
Dependent Claim
26 words
A process as claimed in any one of the preceeding claims characterised in that at least 1% of the sulphur-donor functional groups are occupied by silver.
Claim 9
Dependent Claim
28 words
A process as claimed in any one of the preceeding claims characterised in that the resin comprises a macroporous ion exchange resin based upon a crosslinked polystyrene matrix.
Claim 10
Dependent Claim
22 words
A process according to any one of the preceeding claims characterised in that the iodide compounds comprise C₁ to C₁₀ alkyl iodides.
Claim 11
Dependent Claim
51 words
A process for removing C₁ to C₁₀ alkyl iodides from liquid acetic acid and/or acetic anhydride characterised in that the process comprises contacting the liquid with a macroporous ion exchange resin based on a crosslinked polystyrene matrix having aryl thiol functional groups, at least 1% of which are occupied by silver.
References Cited (Backward Citations)
No citation records indexed.
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