US4471072A
Expired / Lapsed
US
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Preparation of carbonaceous pyropolymers
Assignee: Honeywell UOP LLC
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Filing: 1982-12-20
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Granted: 1984-09-11
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Expires: 2002-12-20
Abstract
Abstract Carbonaceous pyropolymers possessing recurring units containing at least carbon and hydrogen atoms composited on a solid support may be prepared in a solid state process. The process is effected by treating a high surface area solid support such as an inorganic oxide as exemplified by alumina with an organic monomer which is capable of being polymerized by thermal, ionic, or free radical polymerization methods. The monomer is polymerized on the surface of the support under polymerization conditions and thereafter the polymer-coated support is subjected to pyrolysis at temperatures ranging from about 600 DEG to about 1200 DEG C. to form a carbonaceous pyropolymer. If so desired, this composite may then be subjected to the action of a dissolving agent under conditions which will dissolve or leach out the solid support, thus leaving a carbonaceous pyropolymer possessing recurring units containing at least carbon and hydrogen atoms.
Inventors
- 👤 Richard W. Leyerle
- 👤 Lawrence B. Welsh
- 👤 Mary A. Vanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:52
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
169 words
A solid state process for preparation of a carbonaceous pyropolymer possessing recurring units containing at least carbon and hydrogen atoms on a solid support, wherein said pyropolymer possesses a larger number of smaller pores than possessed by said support, which comprises admixing an organic monomer selected from the group consisting of styrene and divinylbenzene which are capable of being polymerized with a high surface area solid support, polymerizing said selected monomer at a temperature in the range of from about ambient to about 250° C. and a pressure in the range of from about atmospheric to about 100 atmospheres, and then pyrolyzing the resultant polymer-coated solid support at a temperature in the range of from about 600° C. to about 1200° C. and a pressure in the range of from about atmospheric to about 100 atmospheres, and thereafter recovering the resultant high surface area carbonaceous pyropolymer possessing recurring units containing at least carbon and hydrogen atoms having a larger number of smaller pores than possessed by said solid support.
Claim 2
Dependent Claim
169 words
A solid state process for preparation of a carbonaceous pyropolymer possessing recurring units containing at least carbon and hydrogen atoms on a solid support, wherein said pyropolymer possesses a larger number of smaller pores than possessed by said support, which comprises admixing an organic monomer selected from the group consisting of styrene and divinylbenzene which are capable of being polymerized with a high surface area solid support, polymerizing said selected monomer at a temperature in the range of from about ambient to about 250° C. and a pressure in the range of from about atmospheric to about 100 atmospheres, and then pyrolyzing the resultant polymer-coated solid support at a temperature in the range of from about 600° C. to about 1200° C. and a pressure in the range of from about atmospheric to about 100 atmospheres, and thereafter recovering the resultant high surface area carbonaceous pyropolymer possessing recurring units containing at least carbon and hydrogen atoms having a larger number of smaller pores than possessed by said solid support.
Claim 3
Dependent Claim
20 words
The process as set forth in claim 1 in which said solid support comprises a high surface area inorganic oxide.
Claim 4
Dependent Claim
19 words
The process as set forth in claim 2 in which said high surface area inorganic oxide is an alumina.
Claim 5
Dependent Claim
18 words
The process as set forth in claim 2 in which said high surface area inorganic oxide is silica.
Claim 6
Dependent Claim
24 words
The process as set forth in claim 1 in which said admixture of an organic monomer and a solid support contains a polymerization initiator.
Claim 7
Dependent Claim
15 words
The process as set forth in claim 5 in which said polymerization initiator is azo-bis-isobutyronitrile.
Claim 8
Dependent Claim
44 words
The process as set forth in claim 1 in which said carbonaceous pyropolymer possessing recurring units containing at least carbon and hydrogen atoms composited on a solid support is contacted with a dissolving agent for said support under conditions selected to dissolve said support.
Claim 9
Dependent Claim
17 words
The process as set forth in claim 7 in which said dissolving agent is an inorganic acid.
Claim 10
Dependent Claim
16 words
The process as set forth in claim 8 in which said inorganic acid is phosphoric acid.
Claim 11
Dependent Claim
16 words
The process as set forth in claim 8 in which said inorganic acid is sulfuric acid.
Claim 12
Dependent Claim
16 words
The process as set forth in claim 7 in which said dissolving agent is a base.
Claim 13
Dependent Claim
15 words
The process as set forth in claim 11 in which said base is sodium hydroxide.
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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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |