US4100217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective production of para-substituted benzenes
Assignee: Mobil Oil AS
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Filing: 1977-05-03
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Granted: 1978-07-11
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Expires: 1997-05-03
Abstract
Abstract Process for the selective production of para-substituted benzene derivatives characterized by the formula: <IMAGE> where R1 and R2 are individually methyl or ethyl by alkylation of a mono alkyl benzene wherein the alkyl substituent contains 1 or 2 carbon atoms, i.e. toluene or ethylbenzene, with a methylating or ethylating agent in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23. The products selectively produced are para-xylene, para-ethyltoluene or para-diethylbenzene.
Inventors
- 👤 Lewis Brewster Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:26
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/865; C07C2/54; C07C2/64; C07C2/66; C07C2/861; C07C2/864; C07C2/868; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
69 words
A process for the selective production of para-substituted benzenes characterized by the formula: ##STR7## where R 1 is ethyl and R 2 is methyl or ethyl which comprises reacting a mono alkyl benzene wherein the alkyl substituent contains 1 or 2 carbon atoms with an ethylating agent at a temperature between about 300° and about 750° C in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.
Claim 2
Dependent Claim
69 words
A process for the selective production of para-substituted benzenes characterized by the formula: ##STR7## where R 1 is ethyl and R 2 is methyl or ethyl which comprises reacting a mono alkyl benzene wherein the alkyl substituent contains 1 or 2 carbon atoms with an ethylating agent at a temperature between about 300° and about 750° C in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said ethylating agent is ethylene.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said reacting takes place at a weight hourly space velocity of between about 5 and about 1500.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is in the hydrogen form.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is used in combination with a porous matrix.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein said temperature is between about 400° and about 700° C.
Claim 8
Dependent Claim
39 words
A process for the selective production of para ethyltoluene which comprises reacting toluene with an ethylating agent at a temperature between about 300° and about 750° C in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.
Claim 9
Dependent Claim
39 words
A process for the selective production of para ethyltoluene which comprises reacting toluene with an ethylating agent at a temperature between about 300° and about 750° C in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein said ethylating agent is ethylene.
Claim 11
Dependent Claim
15 words
The process of claim 7 wherein said crystalline aluminosilicate zeolite is in the hydrogen form.
Claim 12
Dependent Claim
18 words
The process of claim 7 wherein said crystalline aluminosilicate zeolite is used in combination with a porous matrix.
Claim 13
Dependent Claim
39 words
A process for the selective production of para diethylbenzene which comprises reacting ethylbenzene with an ethylating agent at a temperature between about 300° and about 750° C. in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.
Claim 14
Dependent Claim
39 words
A process for the selective production of para diethylbenzene which comprises reacting ethylbenzene with an ethylating agent at a temperature between about 300° and about 750° C. in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.
Claim 15
Dependent Claim
11 words
The process of claim 11 wherein said ethylating agent is ethylene.
Claim 16
Dependent Claim
15 words
The process of claim 11 wherein said crystalline aluminosilicate zeolite is in the hydrogen form.
Claim 17
Dependent Claim
17 words
The process of claim 11 wherein said crystalline aluminosilicate is used in combination with a porous matrix.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |