Patent US1898327A successfully refreshed from Google Patents.
Patent US373159A successfully refreshed from Google Patents.
US4839331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonaceous adsorbents from pyrolyzed polysulfonated polymers
Assignee: Supelco Inc
•
Filing: 1988-01-29
•
Granted: 1989-06-13
•
Expires: 2008-01-29
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 03:58
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28054; B01J20/28088; B01J20/28092; B01J20/02; B01J20/20; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
34 words
Carbonaceous adsorbent particles which comprise the product of controlled pyrolysis of a polysulfonated macroporous crosslinked, vinylaromatic polymer, the particles having multimodal pore-size distribution and a minimum micropore volume of about 0.02 cm 3 /g.
Claim 2
Dependent Claim
34 words
Carbonaceous adsorbent particles which comprise the product of controlled pyrolysis of a polysulfonated macroporous crosslinked, vinylaromatic polymer, the particles having multimodal pore-size distribution and a minimum micropore volume of about 0.02 cm 3 /g.
Claim 3
Dependent Claim
23 words
The carbonaceous particles of claim 1 wherein the pyrolysis is carried out at a temperature of from about 300° to about 1200° C.
Claim 4
Dependent Claim
17 words
The carbonaceous particles of claim 1 wherein the minimum micropore volume is about 0.05 cm 3 /g.
Claim 5
Dependent Claim
17 words
The carbonaceous particles of claim 1 wherein the minimum micropore volume is about 0.1 cm 3 /g.
Claim 6
Dependent Claim
33 words
The carbonaceous particles of claim 1 wherein the polysulfonated polymer contains, prior to pyrolysis, a minimum of about 1.04 times the sulfur content which may be introduced into the same polymer by monosulfonation.
Claim 7
Dependent Claim
24 words
The carbonaceous particles of claim 5 wherein the minimum sulfur content is about 1.07 times the sulfur content which may be introduced by monosulfonation.
Claim 8
Dependent Claim
24 words
The carbonaceous particles of claim 5 wherein the minimum sulfur content is about 1.16 times the sulfur content which may be introduced by monosulfonation.
Claim 9
Dependent Claim
25 words
The carbonaceous particles of claim 1 wherein the macroporous polymer is crosslinked by from about 2% to about 98% of a polyethylenically unsaturated crosslinking monomer.
Claim 10
Dependent Claim
19 words
The carbonaceous particles of claim 8 wherein the amount of crosslinking monomer is from about 3 to about 80%.
Claim 11
Dependent Claim
15 words
The carbonaceous particles of claim 8 wherein the crosslinking monomer is a vinylaromatic crosslinking monomer.
Claim 12
Dependent Claim
31 words
The carbonaceous particles of claim 1 wherein the macroporous polymer is suspension polymerized in the presence of from about 20 to about 600 parts of precipitant per 100 parts of monomer.
Claim 13
Dependent Claim
17 words
The carbonaceous particles of claim 1 wherein the controlled pyrolysis is carried out in an inert atmosphere.
Claim 14
Dependent Claim
17 words
The carbonaceous particles of claim 1 wherein the controlled pyrolysis is carried out in an activating atmosphere.
Claim 15
Dependent Claim
21 words
The carbonaceous particles of claim 1 wherein the particles are treated, subsequent of pyrolysis, with an activating atmosphere at elevated temperature.
Claim 16
Dependent Claim
12 words
The carbonaceous particles of claim 14 wherein the activating atmosphere contains steam.
Claim 17
Dependent Claim
12 words
The carbonaceous particles of claim 14 wherein the activating atmosphere contains ammonia.
Claim 18
Dependent Claim
27 words
The carbonaceous particles of claim 14 wherein the treatment subsequent of pyrolysis is carried out at a temperature of from about 800° C. to about 1000° C.
Claim 19
Dependent Claim
18 words
The carbonaceous particles of claim 1 wherein, subsequent to pyrolysis, the particles are treated with a functionalizing agent.
Claim 20
Dependent Claim
14 words
The carbonaceous particles of claim 18 wherein the functionalizing agent is a sulfonating agent.
Claim 21
Dependent Claim
14 words
The carbonaceous particles of claim 18 wherein the functionalizing agent is a chloromethylating agent.
Claim 22
Dependent Claim
21 words
The carbonaceous particles of claim 20 wherein the treatment with the chloromethylating agent is followed by treatment with an aminating agent.
Claim 23
Dependent Claim
12 words
The carbonaceous particles of claim 21 wherein the aminating agent is trimethylamine.
Claim 24
Dependent Claim
18 words
The carbonaceous particles of claim 1 wherein the particles are treated, subsequent to pyrolysis, with adsorbable, reactive agent.
Claim 25
Dependent Claim
13 words
The carbonaceous particles of claim 23 wherein the reactive agent is hydrogen bromide.
References Cited (Backward Citations)
US4040990A
Cited
US4265768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |