US4489213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina catalyst for alkylating aromatics with olefins
Assignee: Ashland LLC
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Filing: 1981-06-29
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Granted: 1984-12-18
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Expires: 2001-06-29
Abstract
Abstract Mixtures of aromatic and olefinic hydrocarbons are contacted in the presence of a catalyst under appropriate pressure, temperature and space velocity to effect alkylation of the aromatic hydrocarbon. The catalyst is alumina containing boria and an oxide of a metal from Group IVA (tin and lead) or Group VIIB (manganese).
Inventors
- 👤 Stephen M. Kovach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/34; B01J23/18; C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/14; C07C2523/16; C07C2523/32; C07C2523/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
A method for enhancing formation of para-isomers comprising alkylating an aromatic compound having at least one replaceable hydrogen with an olefinic hydrocarbon having between 2 and 12 carbon atoms per molecule comprising contacting said aromatic compound with said olefin in the presence of a catalytic amount of a catalyst comprising: (a) between about 0.1 and about 4% by weight of the oxide of a metal selected from the group consisting of tin, lead, mixtures of tin and lead and mixtures of tin, lead and manganese and; (b) between about 0.5 and 15% by weight of boria, both impregnated on an alumina support.
Claim 2
Independent Claim
102 words
A method for enhancing formation of para-isomers comprising alkylating an aromatic compound having at least one replaceable hydrogen with an olefinic hydrocarbon having between 2 and 12 carbon atoms per molecule comprising contacting said aromatic compound with said olefin in the presence of a catalytic amount of a catalyst comprising: (a) between about 0.1 and about 4% by weight of the oxide of a metal selected from the group consisting of tin, lead, mixtures of tin and lead and mixtures of tin, lead and manganese and; (b) between about 0.5 and 15% by weight of boria, both impregnated on an alumina support.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the metal is selected from the group of tin, lead or mixtures thereof.
Claim 4
Independent Claim
25 words
The method of claims 1, or 2, wherein the weight percent of boria, B 2 O 3 , is between about 1 and about 10.
Claim 5
Independent Claim
25 words
The method of claims 1, or 2, wherein said aromatic hydrocarbon is selected from the group consisting of benzene, toluene, xylene, naphthalene, and mixtures thereof.
Claim 6
Dependent Claim
10 words
The method of claim 4 wherein said olefin is ethylene.
Claim 7
Dependent Claim
10 words
The method of claim 4 wherein said olefin is propylene.
Claim 8
Dependent Claim
10 words
The method of claim 4 wherein said olefin is butylene.
Claim 9
Dependent Claim
44 words
The method of claim 1, or 2, wherein said contacting is conducted at a pressure of between about 100 and about 1000 psig., a temperature of between about 25° and about 150° C., and a liquid-hourly-space velocity of between about 0.1 and about 10.
Claim 10
Dependent Claim
19 words
The method of claim 8 wherein the molar ratio of aromatics to olefin is about 1:1 to about 20:1.
Claim 11
Dependent Claim
38 words
The method of claim 8 wherein the temperature is about 35° to about 150° C.; the liquid-hourly-space velocity is about 1:1 to about 10:1 and the molar ratio of aromatics to olefin is about 2:1 to about 10:1.
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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |