US3668264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkylbenzenes
Assignee: Union Oil Company of California
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Filing: 1969-07-15
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Granted: 1972-06-06
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Expires: 1989-07-15
Abstract
Abstract Alkyl benzenes are produced from a cycloalkane, benzene or an alkylbenzene having a lower degree of alkylation by contacting the feedstock with a zeolitic composition of alumina and silica in the absence of any hydrogenating component and at a temperature from about 400* to 700* F. The contacting is performed at a space velocity from about 1 to about 10 liquid volumes per volume per hour and a pressure from about 1 to 100 atmospheres in the absence or presence of hydrogen. It is believed that the contacting under the aforedescribed conditions dehydrogenates the cycloalkanes and fragments some of the aromatic rings. The resulting fragments are active in alkylating remaining aromatic rings to thereby increase the degree of alkylation of the feedstock.
Inventors
- 👤 Starling K Alley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C; C07; C07C; C07C2/00; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/94
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
29 words
The synthesis of claim 1 wherein said catalyst comprises a zeolite having from 10 to about 95 percent of its ion exchange sites occupied by a rare earth cation.
Claim 2
Dependent Claim
24 words
The synthesis of claim 1 wherein said catalyst is a zeolite having a mol ratio of silica to alumina from 3 to about 8.
Claim 3
Dependent Claim
16 words
The synthesis of claim 3 wherein said catalyst is a zeolite having a Y crystal type.
Claim 4
Dependent Claim
26 words
The synthesis of claim 4 wherein said zeolite has from 10 to about 95 percent of its ion exchange sites occupied by a rare earth cation.
Claim 5
Dependent Claim
45 words
The method of claim 1 wherein said catalyst is pretreated prior to said contacting with said hydrocarbon by maintaining said catalyst at a temperature of 600*-1,000* F. for a period of from one-half to 10 hours while in contact with hydrogen or an inert gas.
Claim 6
Independent Claim
101 words
The method for increasing the content of alkylbenzenes and decreasing the content of benzene in a hydrocarbon stream without substantially decreasing its boiling point which comprises contacting said stream with a catalyst comprising a zeolitic, metallo aluminosilicate having a relatively uniform pore diameter from about 5 to 15 A, in the absence of any hydrogenating catalytic component, and at reaction conditions effective to convert said benzene to alkylbenzenes including a temperature from about 400* to 700* F., a liquid hourly space velocity from 1 to about 10 volumes per volume per hour and a pressure from 1 to about 100 atmospheres.
Claim 7
Independent Claim
108 words
THe method for increasing the degree of alkylation of an aromatic hydrocarbon without substantially decreasing its boiling point which comprises contacting said hydrocarbon with a catalyst comprising a zeolitic, metallo aluminosilicate having a relatively uniform pore diameter from about 5 to 15 A, in the absence of any hydrogenating catalytic component, and at reaction conditions effective to crack the nucleus of some of the aromatics into alkyl fragments and alkylate remaining aromatics with said fragments comprising a temperature from about 400* to 700* F., a liquid hourly space velocity from 1 to about 10 volumes per volume per hour and a pressure from 1 to about 100 atmospheres.
Claim 8
Dependent Claim
24 words
The method of claim 7 wherein said catalyst is a zeolite having a mol ratio of silica to alumina from 3 to about 8.
Claim 9
Dependent Claim
16 words
The method of claim 9 wherein said catalyst is a zeolite having a Y crystal type.
Claim 10
Dependent Claim
26 words
The method of claim 10 wherein said zeolite has from 10 to about 95 percent of its ion exchange sites occupied by a rare earth cation.
Claim 11
Dependent Claim
24 words
The method of claim 8 wherein said catalyst is a zeolite having a mol ratio of silica to alumina from 3 to about 8.
Claim 12
Dependent Claim
16 words
The method of claim 12 wherein said catalyst is a zeolite having a Y crystal type.
Claim 13
Dependent Claim
26 words
The method of claim 13 wherein said zeolite has from 10 to about 95 percent of its ion exchange sites occupied by a rare earth cation.
Claim 14
Dependent Claim
47 words
The method of claim 8 wherein said catalyst is pretreated prior to said contacting with said hydrocarbon by maintaining said catalyst at a temperature of 600* to 1,000* F. for a period of from one-half to 10 hours while in contact with hydrogen or an inert gas.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |