US4263407A
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Polymeric adsorbents from macroreticular polymer beads
Assignee: Rohm and Haas Co
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Filing: 1980-03-12
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Granted: 1981-04-21
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Expires: 2000-03-12
Abstract
Abstract Polymeric adsorbents exhibiting improved porosity and adsorption are produced from lightly crosslinked macroreticular aromatic copolymer beads by post-crosslinking the copolymer beads while in a swollen state, the crosslinks resulting from the post-crosslinking comprising the residue of an external crosslinker selected from a polyfunctional alkylating agent, a polyfunctional acylating agent, and a sulfur halide. An acid catalyst is used for the post-crosslinking, such as a Friedel-Crafts catalyst. The adsorbents may be functionalized to ion exchange resins.
Inventors
- 👤 Samuel F. Reed, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:04
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J20/00; B01J20/22; B01J20/26; B01J20/265; B01J20/267; C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
41 words
A polymeric adsorbent of the macronet type, comprising lightly crosslinked macroreticular aromatic copolymer beads post-crosslinked in a swollen state in the present of a Friedel-Crafts catalyst with a crosslinker selected from a polyfunctional alkylating or acylating agent and a sulfur halide.
Claim 2
Dependent Claim
41 words
A polymeric adsorbent of the macronet type, comprising lightly crosslinked macroreticular aromatic copolymer beads post-crosslinked in a swollen state in the present of a Friedel-Crafts catalyst with a crosslinker selected from a polyfunctional alkylating or acylating agent and a sulfur halide.
Claim 3
Dependent Claim
16 words
The adsorbent of claim 1 wherein the aromatic copolymer is a copolymer of styrene and divinylbenzene.
Claim 4
Dependent Claim
17 words
The adsorbent of claim 1 wherein the aromatic copolymer is a copolymer of styrene and vinylbenzyl chloride.
Claim 5
Dependent Claim
18 words
The adsorbent of claim 1 wherein the aromatic copolymer is a copolymer of styrene, divinylbenzene and vinylbenzyl chloride.
Claim 6
Dependent Claim
19 words
The adsorbent of claim 1 wherein the aromatic copolymer is a copolymer of styrene, divinylbenzene, vinylbenzyl chloride and acrylonitrile.
Claim 7
Dependent Claim
26 words
The adsorbent of claim 1 wherein the crosslinker is a polyfunctional alkylating agent wherein the functionality comprises halogen, hydroxyl, olefin or epoxy, or any combination thereof.
Claim 8
Dependent Claim
12 words
The adsorbent of claim 1 wherein the crosslinker is a sulfur halide.
Claim 9
Dependent Claim
14 words
The adsorbent of claim 7 wherein the sulfur is sulfur monochloride or sulfur dichloride.
Claim 10
Dependent Claim
21 words
The adsorbent of claim 1 wherein the macroreticular aromatic copolymer beads are about 0.25-20% by weight crosslinked prior to said post-crosslinking.
Claim 11
Dependent Claim
23 words
The adsorbent of claim 1 wherein said aromatic copolymer is a copolymer of styrene, divinylbenzene and vinylbenzyl chloride, and said crosslinker is α,α-dichloro-p-xylene.
Claim 12
Dependent Claim
24 words
The adsorbent of claim 1 wherein said aromatic copolymer is a copolymer of styrene, divinylbenzene, vinylbenzyl chloride and acrylonitrile and said crosslinker is α,α-dichloro-p-xylene.
Claim 13
Dependent Claim
21 words
The adsorbent of claim 1 wherein said aromatic copolymer is a copolymer of styrene and divinylbenzene, and said crosslinker is α,α-dichloro-p-xylene.
Claim 14
Dependent Claim
12 words
The adsorbent of claim 1 wherein the crosslinker is an acylating agent.
Claim 15
Dependent Claim
11 words
The adsorbent of claim 13 wherein the crosslinker is terephthaloyl chloride.
Claim 16
Independent Claim
52 words
A method of producing a polymeric adsorbent of the macronet type which comprises swelling lightly crosslinked macroreticular aromatic copolymer beads in an inert organic solvent and crosslinking the swollen beads in the presence of a Friedel-Crafts catalyst with a crosslinker selected from a polyfunctional alkylating or acylating agent and a sulfur halide.
Claim 17
Independent Claim
52 words
A method of producing a polymeric adsorbent of the macronet type which comprises swelling lightly crosslinked macroreticular aromatic copolymer beads in an inert organic solvent and crosslinking the swollen beads in the presence of a Friedel-Crafts catalyst with a crosslinker selected from a polyfunctional alkylating or acylating agent and a sulfur halide.
Claim 18
Dependent Claim
43 words
The method of claim 15 wherein the aromatic copolymer is selected from a copolymer of styrene and divinylbenzene, a copolymer of styrene and vinylbenzyl chloride, a copolymer of styrene, divinylbenzene and vinylbenzyl chloride, and a copolymer of styrene, divinylbenzene, vinylbenzyl chloride and acrylonitrile.
Claim 19
Dependent Claim
26 words
The method of claim 15 wherein the crosslinker is a polyfunctional alkylating agent wherein the functionality comprises halogen, hydroxyl, olefin or epoxy, or any combination thereof.
Claim 20
Dependent Claim
18 words
The method of claim 15 wherein the crosslinker is a sulfur halide is sulfur monochloride or sulfur dichloride.
Claim 21
Dependent Claim
10 words
The method of claim 15 wherein said crosslinker is α,α-dichloro-p-xylene.
Claim 22
Dependent Claim
12 words
The method of claim 15 wherein the crosslinker is an acylating agent.
Claim 23
Dependent Claim
11 words
The method of claim 20 wherein the crosslinker is terephthaloyl chloride.
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.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |