US4191538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic CO2 acceptor and gasification process therewith
Assignee: Consolidation Coal Co
•
Filing: 1979-03-12
•
Granted: 1980-03-04
•
Expires: 1999-03-12
Abstract
Abstract A synthetic CO 2 acceptor comprising at least one compound selected from the group consisting of calcium oxide and calcium carbonate supported in a refractory carrier matrix of the general formula 3CaO(SiO 2 ) x (Al 2 O 3 ) 1-x wherein x is from about 0 to about 1.0.
Inventors
- 👤 Everett Gorin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:01
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/54; C10J3/56; C10J3/72; C10J3/723; C10J3/78; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/094; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/0983; C10J2300/0996; C10J2300/18; C10J2300/1807
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A synthetic CO 2 acceptor consisting essentially of at least one chemically uncombined calcium compound selected from the group consisting of calcium oxide and calcium carbonate supported in a refractory carrier matrix, said carrier having the general formula 3CaO(SiO.sub.2).sub.x (Al.sub.2 O.sub.3).sub.1-x wherein x is from about 0 to about 1 and wherein said chemically uncombined calcium compound is present in an amount equal to from about 10 to about 20 weight percent, calcium oxide equivalent based on the weight of the acceptor.
Claim 2
Dependent Claim
82 words
A synthetic CO 2 acceptor consisting essentially of at least one chemically uncombined calcium compound selected from the group consisting of calcium oxide and calcium carbonate supported in a refractory carrier matrix, said carrier having the general formula 3CaO(SiO.sub.2).sub.x (Al.sub.2 O.sub.3).sub.1-x wherein x is from about 0 to about 1 and wherein said chemically uncombined calcium compound is present in an amount equal to from about 10 to about 20 weight percent, calcium oxide equivalent based on the weight of the acceptor.
Claim 3
Dependent Claim
137 words
In a process for producing a synthesis gas by reacting a carbonaceous feedstock with water in the presence of a carbon dioxide acceptor to produce a synthesis gas rich in hydrogen with at least a portion of the carbon dioxide so produced being reacted with said calcium oxide to produce calcium carbonate, the improvement wherein, said CO 2 acceptor consists essentially of at least one chemically uncombined calcium compound selected from the group consisting essentially of calcium oxide and calcium carbonate supported in a refractory carrier matrix, said carrier having the general formula 3CaO(SiO.sub.2).sub.x (Al.sub.2 O.sub.3).sub.1-x wherein x is from about 0 to about 1 and wherein said chemically uncombined calcium compound is present in an amount equal to from about 10 to about 20 weight percent, calcium oxide equivalent based on the weight of the acceptor.
Claim 4
Dependent Claim
137 words
In a process for producing a synthesis gas by reacting a carbonaceous feedstock with water in the presence of a carbon dioxide acceptor to produce a synthesis gas rich in hydrogen with at least a portion of the carbon dioxide so produced being reacted with said calcium oxide to produce calcium carbonate, the improvement wherein, said CO 2 acceptor consists essentially of at least one chemically uncombined calcium compound selected from the group consisting essentially of calcium oxide and calcium carbonate supported in a refractory carrier matrix, said carrier having the general formula 3CaO(SiO.sub.2).sub.x (Al.sub.2 O.sub.3).sub.1-x wherein x is from about 0 to about 1 and wherein said chemically uncombined calcium compound is present in an amount equal to from about 10 to about 20 weight percent, calcium oxide equivalent based on the weight of the acceptor.
Claim 5
Dependent Claim
42 words
The improvement of claim 2 wherein said acceptor is contacted with steam at a pressure greater than 10 atmospheres and a temperature in excess of 1200° F. after at least a portion of said calcium oxide has reacted to produce calcium carbonate.
Claim 6
Dependent Claim
31 words
The improvement of claim 3 wherein said steam contacting is at a pressure from about 10 atmospheres to about 20 atmospheres and a temperature from about 1200° to about 1600° F.
Claim 7
Dependent Claim
21 words
The improvement of claim 4 wherein a CO 2 pressure up to about one atmosphere is present during said steam contacting.
Claim 8
Dependent Claim
30 words
The improvement of claim 2 wherein said acceptor is regenerated by heating said acceptor to a temperature in excess of 1800° F. thereby converting said calcium carbonate to calcium oxide.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |