Patent US4191813A successfully refreshed from Google Patents.
US4191813A
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US
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Polymeric adsorbents from vinylbenzyl chloride copolymer beads
Assignee: Rohm and Haas Co
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Filing: 1978-07-24
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Granted: 1980-03-04
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Expires: 1998-07-24
Abstract
Abstract Polymeric adsorbents exhibiting improved adsorption are produced from lightly crosslinked vinylbenzyl chloride copolymer beads by post-crosslinking the copolymer beads while in a swollen state by contact with a Lewis acid catalyst such as a Friedel-Crafts catalyst or an acidic sulfonating agent. The adsorbents post-crosslinked with a Friedel-Crafts catalyst may be functionalized to ion exchange resins. Those adsorbents post-crosslinked with a sulfonating agent already are strong acid ion exchange resins.
Inventors
- 👤 Samuel F. Reed
- 👤 Robert K. Pinschmidt, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:41
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J20/00; B01J20/22; C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/18; C08F8/00
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
54 words
A polymeric adsorbent comprising lightly crosslinked copolymer beads of the macronet type, containing at least 40% by weight of vinylbenzyl chloride, the balance of monomers in said copolymer beads, if any, comprising a major proportion of aromatic monomers, said lightly crosslinked copolymer beads being post-crosslinked in a swollen state with a Lewis acid catalyst.
Claim 2
Dependent Claim
54 words
A polymeric adsorbent comprising lightly crosslinked copolymer beads of the macronet type, containing at least 40% by weight of vinylbenzyl chloride, the balance of monomers in said copolymer beads, if any, comprising a major proportion of aromatic monomers, said lightly crosslinked copolymer beads being post-crosslinked in a swollen state with a Lewis acid catalyst.
Claim 3
Dependent Claim
20 words
The adsorbent of claim 1 wherein vinylbenzyl chloride comprises up to 99.5% by weight of the lightly crosslinked copolymer beads.
Claim 4
Dependent Claim
19 words
The adsorbent of claim 1 where the lightly crosslinked copolymer is a copolymer of vinylbenzyl chloride, styrene and divinylbenzene.
Claim 5
Dependent Claim
18 words
The adsorbent of claim 1 where the lightly crosslinked copolymer is a copolymer of vinylbenzyl chloride and divinylbenzene.
Claim 6
Dependent Claim
19 words
The adsorbent of claim 1 where the lightly crosslinked copolymer is a copolymer of vinylbenzyl chloride, acrylonitrile and divinylbenzene.
Claim 7
Dependent Claim
20 words
The adsorbent of claim 1 where the lightly crosslinked copolymer is a copolymer of vinylbenzyl chloride, styrene, acrylonitrile and divinylbenzene.
Claim 8
Dependent Claim
14 words
The adsorbent of claim 1 where the lightly crosslinked copolymer is in gel form.
Claim 9
Dependent Claim
14 words
The adsorbent of claim 1 wherein the lightly crosslinked copolymer is in macroreticular form.
Claim 10
Dependent Claim
20 words
The adsorbent of claim 1 wherein the Lewis acid is selected from a Friedel-Crafts catalyst and an acidic sulfonating agent.
Claim 11
Dependent Claim
12 words
The adsorbent of claim 1 wherein the Lewis acid is sulfuric acid.
Claim 12
Dependent Claim
17 words
The adsorbent of claim 1 wherein the lightly crosslinked copolymer beads are about 0.1-20% by weight crosslinking.
Claim 13
Dependent Claim
35 words
The adsorbent of claim 1 wherein the lightly crosslinked copolymer comprises at least 40% by weight vinylbenzyl chloride, about 0.3-8% by weight divinylbenzene and the balance styrene, and the Lewis acid is a Friedel-Crafts catalyst.
Claim 14
Dependent Claim
34 words
The adsorbent of claim 1 wherein the lightly crosslinked copolymer comprises at least 40% by weight vinylbenzyl chloride, about 0.3-8% by weight divinylbenzene and the balance styrene, and the Lewis acid is sulfuric acid.
Claim 15
Independent Claim
63 words
A method of producing a polymeric adsorbent of the macronet type, which comprises swelling lightly crosslinked copolymer beads containing at least 40% by weight of vinylbenzyl chloride the balance of monomers in said copolymer beads, if any, comprising a major proportion of aromatic monomers, in an organic solvent and crosslinking the swollen beads by reactively contacting the beads with a Lewis acid catalyst.
Claim 16
Independent Claim
63 words
A method of producing a polymeric adsorbent of the macronet type, which comprises swelling lightly crosslinked copolymer beads containing at least 40% by weight of vinylbenzyl chloride the balance of monomers in said copolymer beads, if any, comprising a major proportion of aromatic monomers, in an organic solvent and crosslinking the swollen beads by reactively contacting the beads with a Lewis acid catalyst.
Claim 17
Dependent Claim
23 words
A method of claim 14 wherein the copolymer is a copolymer of vinylbenzyl chloride, divinylbenzene and at least one other monoethylenically unsaturated monomer.
Claim 18
Dependent Claim
11 words
The method of claim 15 wherein said other monomer is styrene.
Claim 19
Dependent Claim
13 words
The method of claim 15 wherein said other monomers are styrene and acrylonitrile.
Claim 20
Dependent Claim
24 words
The method of claim 14 wherein the organic solvent is selected from halogenated hydrocarbons, aliphatic hydrocarbons, carbon disulphide, nitroparaffins, nitroaromatics, or any mixture thereof.
Claim 21
Dependent Claim
14 words
The method of claim 14 wherein the Lewis acid catalyst is a Friedel-Crafts catalyst.
Claim 22
Dependent Claim
13 words
The method of claim 14 wherein the Lewis acid catalyst is sulfuric acid.
Claim 23
Dependent Claim
12 words
The method of claim 14 wherein the organic solvent is ethylene dichloride.
Claim 24
Dependent Claim
11 words
An ion exchange resin comprising a functionalized adsorbent of claim 1.
Claim 25
Dependent Claim
11 words
An ion exchange resin comprising a functionalized adsorbent of claim 2.
Claim 26
Dependent Claim
11 words
An ion exchange resin comprising a functionalized adsorbent of claim 3.
Claim 27
Dependent Claim
11 words
An ion exchange resin comprising a functionalized adsorbent of claim 4.
Claim 28
Dependent Claim
11 words
An ion exchange resin comprising a functionalized adsorbent of claim 8.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |