US4061689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the conversion of aromatic hydrocarbons
Assignee: Honeywell UOP LLC
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Filing: 1975-12-29
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Granted: 1977-12-06
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Expires: 1995-12-29
Abstract
Abstract A process for the converting of aromatic hydrocarbons, e.g., reacting an alkylating agent, preferably an olefin, with an aromatic hydrocarbon. The process uses a catalyst prepared by reducing, with hydrogen gas at an elevated temperature, titanium tetrafluoride on an inorganic oxide which contained surface hydroxyl groups.
Inventors
- 👤 Ji-Yong Ryu
- 👤 Dalia Germanas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:12
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; B01J37/00; B01J37/16; B01J37/18; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/08; C07C2527/00; C07C2527/06; C07C2527/135; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A process for the alkylation of an aromatic hydrocarbon comprising contacting the aromatic hydrocarbon with an alkylating agent at aromatic hydrocarbon alkylation conditions in the presence of a catalyst prepared by reacting titanium tetrafluoride with a support which contains surface hydroxyl groups and thereafter reducing with hydrogen at an elevated temperature to form titanium subfluoride, and recovering an alkylated aromatic hydrocarbon as a product of the process.
Claim 2
Dependent Claim
67 words
A process for the alkylation of an aromatic hydrocarbon comprising contacting the aromatic hydrocarbon with an alkylating agent at aromatic hydrocarbon alkylation conditions in the presence of a catalyst prepared by reacting titanium tetrafluoride with a support which contains surface hydroxyl groups and thereafter reducing with hydrogen at an elevated temperature to form titanium subfluoride, and recovering an alkylated aromatic hydrocarbon as a product of the process.
Claim 3
Dependent Claim
41 words
The process of claim 1 wherein the catalyst is prepared by impregnating the support with a solution of TiF 4 , drying in an inert atmosphere at 200° to 600° C, and then reducing with hydrogen at 400° to 700° C.
Claim 4
Dependent Claim
48 words
The process of claim 2, wherein the impregnating solution used is selected from the group consisting of an aqueous solution of TiF 4 , polar organic solvent solutions of TiF 4 , and aqueous solutions of M 2 TiF 6 where M is H, Li, Na or K.
Claim 5
Dependent Claim
45 words
The process of claim 1 wherein the catalyst is prepared by subliming TiF 4 in a carrier gas and contacting the gas and TiF 4 with the support at a temperature of 284° to 700° C, then reducing with hydrogen at 400° to 700° C.
Claim 6
Dependent Claim
49 words
The process of claim 1 wherein, prior to reduction, the catalyst is given a thermal pre-treatment at 100 to 200° C for one-half to 2 hours, then at 250° to 350° C for one-half to 2 hours, and then at 400° to 600° C for one to 10 hours.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein the support is a Group III-A metal oxide.
Claim 8
Dependent Claim
32 words
The process of claim 6 wherein the support is alumina having an apparent bulk density of 0.3 to 0.8 gm/cm 3 and a surface area of 1 to 500 m 2 /g.
Claim 9
Dependent Claim
23 words
The process of claim 6 wherein the Group III-A metal oxide is selected from the group of oxides of aluminum gallium and indium.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein the catalyst contains, on an elemental basis, about 0.5 to 20 weight percent titanium.
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein the aromatic hydrocarbon is selected from the group consisting of benzene, toluene, ethylbenzene, xylene and cumene isomers.
Claim 12
Dependent Claim
21 words
The process of claim 1 wherein benzene is alkylated with an olefin selected from the group consisting of ethylene and propylene.
Claim 13
Dependent Claim
24 words
The process of claim 1 wherein benzene is alkylated with an olefin selected from the group consisting of C 8 to C 18 olefins.
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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |