US4052475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toluene disproportionation process using a supported perfluorinated polymer catalyst
Assignee: Shell USA Inc
•
Filing: 1977-04-01
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Granted: 1977-10-04
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Expires: 1997-04-01
Abstract
Abstract A process and catalyst for the disproportionation of toluene is disclosed. The catalyst is a supported solid perfluorinated polymer containing pendent sulfonic acid groups.
Inventors
- 👤 James D. McClure
- 👤 Stanley G. Brandenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:51
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/12; C07C2531/00; C07C2531/02; C07C2531/06; C07C2531/08; C07C2531/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A process for the catalytic disproportionation of toluene which comprises contacting a toluene feed stream in a reaction zone at a temperature of between about 150° C and 225° C with a catalyst composition comprising a solid perfluorinated polymer catalyst supported on an inert porous carrier having an average pore diameter of between about 50 A and about 600 A in a weight ratio of catalyst to support of between about 0.1:100 and about 20:100 wherein said catalyst contains a repeating structure selected from the group of: ##STR8## where n is 0, 1 or 2; R is a radical selected from the group consisting of fluorine and perfluoroalkyl radicals having from 1 to 10 carbon atoms; and X is selected from the group consisting of: [O(CF.sub.2).sub.m ], [OCF.sub.2 CFY] or [OCFYCF.sub.2 ] where m is an integer from 2 to 10 and Y is a radical selected from the class consisting of fluorine and the trifluoromethyl radical.
Claim 2
Dependent Claim
157 words
A process for the catalytic disproportionation of toluene which comprises contacting a toluene feed stream in a reaction zone at a temperature of between about 150° C and 225° C with a catalyst composition comprising a solid perfluorinated polymer catalyst supported on an inert porous carrier having an average pore diameter of between about 50 A and about 600 A in a weight ratio of catalyst to support of between about 0.1:100 and about 20:100 wherein said catalyst contains a repeating structure selected from the group of: ##STR8## where n is 0, 1 or 2; R is a radical selected from the group consisting of fluorine and perfluoroalkyl radicals having from 1 to 10 carbon atoms; and X is selected from the group consisting of: [O(CF.sub.2).sub.m ], [OCF.sub.2 CFY] or [OCFYCF.sub.2 ] where m is an integer from 2 to 10 and Y is a radical selected from the class consisting of fluorine and the trifluoromethyl radical.
Claim 3
Dependent Claim
42 words
A process according to claim 1 wherein the weight hourly space velocity, defined as the weight per hour of toluene feed divided by the weight of catalyst (not including support) employed, varies from between about 0.5 to about 10.0 hr -1 .
Claim 4
Dependent Claim
50 words
A process according to claim 1 wherein a gas stream is added to the reaction zone in a volume ratio to the toluene feed stream of between about 0.5:1 and about 20:1 and wherein the gas stream contains between about 2% and about 95% hydrogen with the remainder being nitrogen.
Claim 5
Dependent Claim
22 words
A process according to claim 1 wherein said carrier is selected from the group consisting of alumina, silica, silica-alumina and proous glass.
Claim 6
Dependent Claim
11 words
A process according to claim 4 wherein said carrier is silica.
Claim 7
Dependent Claim
34 words
A process according to claim 1 wherein said catalyst has the general structure: ##STR9## where n equals 1 or 2 and the ratio of x over y varies from about 2 to about 50.
Claim 8
Dependent Claim
18 words
A process according to claim 1 wherein said toluene feed stream contains greater than 50% by volume toluene.
References Cited (Backward Citations)
US3326866A
Cited
US3324193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |