US4219690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatics with olefins in the presence of an alumina catalyst
Assignee: Ashland LLC
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Filing: 1979-07-05
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Granted: 1980-08-26
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Expires: 1999-07-05
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 18:20
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/32; C07C2523/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A method for alkylating an aromatic compound having at least one replaceable hydrogen with an olefinic hydrocarbon having between 2 and 12 carbon atoms per molecule, said method yielding a product having an improved concentrations of ortho and para compounds, comprising contacting said aromatic compound with said olefinic hydrocarbon at a temperature between about 25° and about 150° C. in the presence of a catalyst comprising: (a) manganese in oxide form, the concentration of manganese in elemental form being between about 0.1 and about 4.0 percent by weight; and (b) between about 0.5 and about 15 percent by weight of boria, both the boria and the manganese in oxide form being impregnated on an alumina support.
Claim 2
Independent Claim
116 words
A method for alkylating an aromatic compound having at least one replaceable hydrogen with an olefinic hydrocarbon having between 2 and 12 carbon atoms per molecule, said method yielding a product having an improved concentrations of ortho and para compounds, comprising contacting said aromatic compound with said olefinic hydrocarbon at a temperature between about 25° and about 150° C. in the presence of a catalyst comprising: (a) manganese in oxide form, the concentration of manganese in elemental form being between about 0.1 and about 4.0 percent by weight; and (b) between about 0.5 and about 15 percent by weight of boria, both the boria and the manganese in oxide form being impregnated on an alumina support.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said aromatic hydrocarbon is selected from the group consisting of benzene, toluene, xylene, naphthalene, and mixtures thereof.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein said olefin is ethylene.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein said olefin is propylene.
Claim 6
Dependent Claim
10 words
The method of claim 1 wherein said olefin is butylene.
Claim 7
Dependent Claim
42 words
The method of claim 1 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.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |