US3767567A
Expired / Lapsed
US
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Process for preparing olefins
Assignee: Toyo Engineering Corp
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Filing: 1971-11-22
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Granted: 1973-10-23
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Expires: 1991-11-22
Abstract
Abstract Olefins are manufactured by catalytically cracking a hydrocarbon feedstock by contacting said feedstock with steam at a temperature of 650*-900* C in the presence of a catalyst consisting essentially of at least 20 wt. percent of an oxide selected from the group consisting of beryllium oxide, calcium oxide and strontium oxide and the balance is aluminum oxide.
Inventors
- 👤 T Tomita
- 👤 K Kikuchi
- 👤 T Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/08; B01J23/00; B01J23/02; C; C07; C07C; C07C4/00; C07C4/02; C07C4/06; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C10; C10G; C10G2400/00; C10G2400/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
A process according to claim 1, wherein the sintered catalyst is a mixture of aluminum oxide and beryllium oxide.
Claim 2
Dependent Claim
19 words
A process according to claim 1, wherein the sintered catalyst is a mixture of aluminum oxide and calcium oxide.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein the sintered catalyst is a mixture of strontium oxide and aluminum oxide.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein the sintered catalyst is a mixture of beryllium oxide, calcium oxide and aluminum oxide.
Claim 5
Dependent Claim
21 words
A process according to claim 1, wherein the sintered catalyst is a mixture of beryllium oxide, strontium oxide and aluminum oxide.
Claim 6
Dependent Claim
21 words
A process according to claim 1, wherein the sintered catalyst is a mixture of calcium oxide, strontium oxide and aluminum oxide.
Claim 7
Dependent Claim
23 words
A process according to claim 1, wherein the sintered catalyst is a mixture of beryllium oxide, calcium oxide, strontium oxide and aluminum oxide.
Claim 8
Dependent Claim
30 words
A process according to claim 1, in which the space velocity of the stream of reactants in the reaction zone is in the range of 5,000 to 50,000 hr 1.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |