EP0544324B1
Expired / Lapsed
EP
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Process for removing metals from vinylphenol polymers
Assignee: Maruzen Petrochemical Co Ltd
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Filing: 1992-11-27
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Granted: 1996-01-31
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Expires: 2012-11-27
Abstract
No abstract record available.
Inventors
- 👤 Tadashi Matsumoto
- 👤 Mitsuru Akaho
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 12:58
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
29 words
A process for removing metals from a vinylphenol polymer characterized by dissolving said vinylphenol polymer into a solvent and contacting said solution with a strongly acidic cation exchange resin.
Claim 2
Dependent Claim
37 words
A process according to Claim 1, wherein said solution of vinylphenol polymer has a viscosity of 0.1 PaS (1 poise) or less at the temperature when said solution is contacted with said strongly acidic cation exchange resin.
Claim 3
Dependent Claim
25 words
A process according to Claim 2, wherein said solution of vinylphenol polymer has a viscosity within a range of 0.01-0.1 PaS (0.1 - 1 poise).
Claim 4
Dependent Claim
26 words
A process according to any one of Claims 1 - 3, wherein said process is carried out by the use of a fixed bed flow method.
Claim 5
Dependent Claim
42 words
A process according to Claim 4, wherein said process is carried out in a vinylphenol polymer charge rate expressed in the terms of liquid hourly space velocity of 0.2 - 5 h⁻¹ on the basis of the solution of said vinylphenol polymer.
Claim 6
Dependent Claim
27 words
A process according to any one of Claims 1 - 5, wherein said process is carried out at a temperature within a range of 0 - 100°C.
Claim 7
Dependent Claim
29 words
A process according to any one of Claims 1 - 6, wherein said solvent is selected from alcohols, esters, cyclic ethers, ketones, alkylene glycol ethers and alkylene glycol esters.
Claim 8
Dependent Claim
28 words
A process according to any one of Claims 1 - 7, wherein said process is carried out in coexistence of an anion exchange resin or a chelating resin.
References Cited (Backward Citations)
No citation records indexed.
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