US4064042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of blood using partially pyrolyzed polymer particles
Assignee: Rohm and Haas Co
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Filing: 1976-02-02
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Granted: 1977-12-20
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Expires: 1996-02-02
Abstract
Abstract Partially pyrolyzed particles of macroporous resinous polymer have improved structural stability and utility. Pyrolyzed preformed beads are useful as adsorbents in both gaseous and liquid media to remove impurities such as vinylchloride monomer from gases, aromatic compounds such as barbituates from blood, and phenolics from industrial waste streams. Pyrolyzed materials are also useful as catalysts in industrial and laboratory applications due to the controllable surface area and due to a variety of metals, among other things, that may be incorporated into the particles prior to pyrolysis. Preferred adsorbents are prepared from pyrolyzed beads of macroreticular ion exchange resins.
Inventors
- 👤 Robert Kunin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:30
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; C; C08; C08F; C08F8/00; C08F8/50; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A process for separating an organic substance from blood which comprises contacting the blood with particles of a partially pyrolyzed macroporous synthetic polymer produced by the controlled thermal degradation of a macroporous synthetic polymer containing a carbon-fixing moiety and derived from one or more ethylenically unsaturated monomers, or monomers which are condensed to yield macroporous polymers, or mixtures thereof, which partially pyrolyzed macroporous synthetic polymer contains: (a) at least 85% by weight of carbon, (b) multimodal pore distribution with macropores ranging in size from about 50 A to about 100,000 A in average critical dimension, and (c) a carbon to hydrogen atom ratio of between about 1.5:1 and 20:1.
Claim 2
Dependent Claim
109 words
A process for separating an organic substance from blood which comprises contacting the blood with particles of a partially pyrolyzed macroporous synthetic polymer produced by the controlled thermal degradation of a macroporous synthetic polymer containing a carbon-fixing moiety and derived from one or more ethylenically unsaturated monomers, or monomers which are condensed to yield macroporous polymers, or mixtures thereof, which partially pyrolyzed macroporous synthetic polymer contains: (a) at least 85% by weight of carbon, (b) multimodal pore distribution with macropores ranging in size from about 50 A to about 100,000 A in average critical dimension, and (c) a carbon to hydrogen atom ratio of between about 1.5:1 and 20:1.
Claim 3
Dependent Claim
15 words
A process as claimed in claim 1 wherein the organic substance comprises an aromatic molecule.
Claim 4
Dependent Claim
14 words
A process as claimed in claim 1 wherein the organic substance includes uric acid.
Claim 5
Dependent Claim
14 words
A process as claimed in claim 1 wherein the organic substance includes a barbiturate.
Claim 6
Dependent Claim
13 words
A process as claimed in claim 1 wherein the organic substance includes creatinine.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 1 wherein the partially pyrolyzed macroporous synthethic polymer contains pores of molecular seive size of about 2 - 10 A as well as macropores of larger sizes.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |