US4957897A
Expired / Lapsed
US
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Carbonaceous adsorbents from pyrolyzed polysulfonated polymers
Assignee: Rohm and Haas Co
•
Filing: 1989-02-07
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Granted: 1990-09-18
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Expires: 2009-02-07
Abstract
Abstract Carbonaceous adsorbent particles having multimodal pore size, including micropores and macropores, with improved adsorptive and separative properties, are prepared by partial pyrolysis of polysulfonated macroporous precursor resins, said resins being in turn derived from macroporous poly(vinylaromatic) resins. The particles may be further treated by activating with reactive gases or by functionalization.
Inventors
- 👤 Stephen G. Maroldo
- 👤 William R. Betz
- 👤 Noah Borenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
44 words
A process for preparing carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g.
Claim 2
Dependent Claim
44 words
A process for preparing carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the minimum micropore volume is about 0.1 cm 3 /g.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the polysulfonated polymer particles contain, prior to pyrolysis, a minimum of about 1.04 times the sulfur content which may be introduced into the same polymer by monosulfonation.
Claim 5
Dependent Claim
29 words
The process of claim 3 wherein the minimum amount of sulfur is about 1 07 times the sulfur content which may be introduced into the same polymer by monosulfonation.
Claim 6
Dependent Claim
28 words
The process of claim 3 wherein the minimum amount of sulfur is about 1.16 times the sulfur content which may be introduced into the same polymer by monosulfonation.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the pyrolysis is carried out in an inert atmosphere.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein the pyrolysis is carried out in an activating atmosphere.
Claim 9
Dependent Claim
11 words
The process of claim 7 wherein the activating atmosphere contains steam.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein the activating atmosphere contains ammonia.
Claim 11
Dependent Claim
60 words
A process for preparing activated carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature of from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g, and subsequently treating the pyrolyzed particles with an activating atmosphere at an elevated temperature.
Claim 12
Dependent Claim
60 words
A process for preparing activated carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature of from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g, and subsequently treating the pyrolyzed particles with an activating atmosphere at an elevated temperature.
Claim 13
Dependent Claim
24 words
The process of claim 10 wherein the elevated temperature is from about 800° C. to about 1000° C. and the activating atmosphere contains steam.
Claim 14
Dependent Claim
24 words
The process of claim 10 wherein the elevated temperature is from about 800° C. to about 1000° C. and the activating atmosphere contains ammonia.
Claim 15
Dependent Claim
56 words
A process for preparing functionalized carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature of from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g, and subsequently treating the pyrolyzed particles with a functionalizing agent.
Claim 16
Dependent Claim
56 words
A process for preparing functionalized carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature of from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g, and subsequently treating the pyrolyzed particles with a functionalizing agent.
Claim 17
Dependent Claim
13 words
The process of claim 13 wherein the functionalizing agent is a sulfonating agent.
Claim 18
Dependent Claim
13 words
The process of claim 13 wherein the functionalizing agent is a chloromethylating agent.
Claim 19
Dependent Claim
20 words
The process of claim 15 wherein the treatment with the chloromethylating agent is followed by treatment with an aminating agent.
Claim 20
Dependent Claim
57 words
A process for preparing functionalized carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature of from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g, and subsequently treating the pyrolyzed particles with a desorbable, reactive agent.
Claim 21
Dependent Claim
57 words
A process for preparing functionalized carbonaceous adsorbent particles which comprises pyrolyzing, at a temperature of from about 300° C. to about 1200° C., particles of a polysulfonated macroporous, crosslinked, vinylaromatic polymer having multimodal pore-size distribution to a minimum micropore volume of about 0.02 cm 3 /g, and subsequently treating the pyrolyzed particles with a desorbable, reactive agent.
Claim 22
Dependent Claim
12 words
The process of claim 17 wherein the reactive agent is hydrogen bromide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |