US4181811A
Expired / Lapsed
US
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Selective reaction of 1,4-disubstituted aromatic compounds
Assignee: Mobil Oil AS
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Filing: 1978-12-14
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Granted: 1980-01-01
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Expires: 1998-12-14
Abstract
Abstract Isomeric mixtures of non-polar disubstituted aromatic compounds are brought into contact with a shape selective crystalline zeolite catalyst, under cracking or transalkylation conditions, to undergo selective reaction of the 1,4-isomer, thereby leaving the 1,2-isomer and/or 1,3-isomer in excess of equilibrium. The shape selective zeolite catalyst employed herein comprises a crystalline zeolite having a silica to alumina ratio of at least 12 and a constraint index, as herein defined, within the approximate range of 1 to 12.
Inventors
- 👤 Lewis B. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:06
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; C07C45/00; C07C45/78; C07C45/85; B01J2229/00; B01J2229/10; B01J2229/20; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/70
Claims Analysis
Total Claims: 63
Claim 1
Independent Claim
87 words
A process for selective reaction of 1,4-disubstituted aromatic compounds in a mixture comprising disubstituted aromatic isomers, the process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a product in which the content of said 1,4-disubstituted aromatic compounds is reduced relative to the content of said disubstituted aromatic isomers in said mixture prior to said contacting.
Claim 2
Dependent Claim
87 words
A process for selective reaction of 1,4-disubstituted aromatic compounds in a mixture comprising disubstituted aromatic isomers, the process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a product in which the content of said 1,4-disubstituted aromatic compounds is reduced relative to the content of said disubstituted aromatic isomers in said mixture prior to said contacting.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said 1,4-disubstituted aromatic compound is a 1,4-dialkylbenzene.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein said 1,4-dialkylbenzene is 1,4-diisopropylbenzene.
Claim 5
Dependent Claim
10 words
The process of claim 2 wherein said 1,4-dialkylbenzene is 1-ethyl-4-methylbenzene.
Claim 6
Dependent Claim
10 words
The process of claim 2 wherein said 1,4-dialkylbenzene is 1,4-diethylbenzene.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein said 1,4-dialkylbenzene is 1-t-butyl-4-methylbenzene.
Claim 8
Dependent Claim
10 words
The process of claim 2 wherein said 1,4-dialkylbenzene is 1-isopropyl-4-methylbenzene.
Claim 9
Dependent Claim
35 words
The process of claim 1 wherein said conversion conditions include a temperature between about 150° C. and about 800° C., a pressure between about 10 4 N/m 2 and about 10 7 N/m 2 .
Claim 10
Dependent Claim
35 words
The process of claim 1 wherein said conversion conditions include a temperature between about 250° C. and about 550° C., a pressure between about 2×10 4 N/m 2 and about 2.5×10 6 N/m 2 .
Claim 11
Dependent Claim
43 words
The process of claim 1 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 0.5 and about 40 weight percent of at least one oxide selected from the group consisting of the oxides of phosphorus, antimony, boron and magnesium.
Claim 12
Dependent Claim
29 words
The process of claim 1 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of phosphorus.
Claim 13
Dependent Claim
29 words
The process of claim 1 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of magnesium.
Claim 14
Dependent Claim
37 words
The process of claim 1 wherein said crystalline zeolite has undergone prior modification by steaming at a temperature between about 250° C. and about 1000° C. for a period of between about 0.5 and about 100 hours.
Claim 15
Dependent Claim
11 words
The process of claim 1 wherein said crystalline zeolite is ZSM-5.
Claim 16
Dependent Claim
14 words
The process of claim 14 wherein said ZSM-5 is admixed with a binder therefor.
Claim 17
Dependent Claim
11 words
The process of claim 1 wherein said crystalline zeolite is ZSM-11.
Claim 18
Dependent Claim
14 words
The process of claim 16 wherein said ZSM-11 is admixed with a binder therefor.
Claim 19
Dependent Claim
11 words
The process of claim 1 wherein said crystalline zeolite is ZSM-23.
Claim 20
Dependent Claim
14 words
The process of claim 18 wherein said ZSM-23 is admixed with a binder therefor.
Claim 21
Dependent Claim
26 words
The process of claim 1 wherein said mixture containing said 1,4-disubstituted aromatic compound is admixed with a diluent prior to contacting it with said zeolite catalyst.
Claim 22
Dependent Claim
114 words
A process for the manufacture of 1,3-disubstituted aromatic compounds by the selective reaction of the 1,4-disubstituted isomer thereof from mixtures comprising both isomers, either alone or in admixture with other aromatic or non-aromatic materials, said process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a resulting product in which the ratio of the 1,3-isomer to the 1,4-isomer of said disubstituted aromatic compound is increased relative to the ratio of said isomers in said mixture prior to contacting it with said zeolite catalyst.
Claim 23
Dependent Claim
114 words
A process for the manufacture of 1,3-disubstituted aromatic compounds by the selective reaction of the 1,4-disubstituted isomer thereof from mixtures comprising both isomers, either alone or in admixture with other aromatic or non-aromatic materials, said process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a resulting product in which the ratio of the 1,3-isomer to the 1,4-isomer of said disubstituted aromatic compound is increased relative to the ratio of said isomers in said mixture prior to contacting it with said zeolite catalyst.
Claim 24
Dependent Claim
13 words
The process of claim 21 wherein said disubstituted aromatic compound is a dialkylbenzene.
Claim 25
Dependent Claim
10 words
The process of claim 22 wherein said dialkylbenzene is diisopropylbenzene.
Claim 26
Dependent Claim
10 words
The process of claim 22 wherein said dialkylbenzene is ethylmethylbenzene.
Claim 27
Dependent Claim
10 words
The process of claim 22 wherein said dialkylbenzene is diethylbenzene.
Claim 28
Dependent Claim
10 words
The process of claim 22 wherein said dialkylbenzene is t-butylmethylbenzene.
Claim 29
Dependent Claim
10 words
The process of claim 22 wherein said dialkylbenzene is isopropylmethylbenzene.
Claim 30
Dependent Claim
35 words
The process of claim 21 wherein said conversion conditions include a temperature between about 150° C. and about 800° C., a pressure between about 10 4 N/m 2 and about 10 7 N/m 2 .
Claim 31
Dependent Claim
35 words
The process of claim 21 wherein said conversion conditions include a temperature between about 250° C. and about 550° C., a pressure between about 2×10 4 N/m 2 and about 2.5×10 6 N/m 2 .
Claim 32
Dependent Claim
43 words
The process of claim 21 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 0.5 and about 40 weight percent of at least one oxide selected from the group consisting of the oxides of phosphorus, antimony, boron and magnesium.
Claim 33
Dependent Claim
29 words
The process of claim 21 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of phosphorus.
Claim 34
Dependent Claim
29 words
The process of claim 21 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of magnesium.
Claim 35
Dependent Claim
37 words
The process of claim 21 wherein said crystalline zeolite has undergone prior modification by steaming at a temperature between about 250° C. and about 1000° C. for a period of between about 0.5 and about 100 hours.
Claim 36
Dependent Claim
11 words
The process of claim 21 wherein said crystalline zeolite is ZSM-5.
Claim 37
Dependent Claim
14 words
The process of claim 34 wherein said ZSM-5 is admixed with a binder therefor.
Claim 38
Dependent Claim
11 words
The process of claim 21 wherein said crystalline zeolite is ZSM-11.
Claim 39
Dependent Claim
14 words
The process of claim 36 wherein said ZSM-11 is admixed with a binder therefor.
Claim 40
Dependent Claim
11 words
The process of claim 21 wherein said crystalline zeolite is ZSM-23.
Claim 41
Dependent Claim
14 words
The process of claim 38 wherein said ZSM-23 is admixed with a binder therefor.
Claim 42
Dependent Claim
26 words
The process of claim 21 wherein said mixture containing said disubstituted aromatic compounds is admixed with a diluent prior to contacting it with said zeolite catalyst.
Claim 43
Dependent Claim
114 words
A process for the manufacture of 1,2-disubstituted aromatic compounds by the selective reaction of the 1,4-disubstituted isomer thereof from mixtures comprising both isomers, either alone or in admixture with other aromatic or non-aromatic materials, said process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a resulting product in which the ratio of the 1,2-isomer to the 1,4-isomer of said disubstituted aromatic compound is increased relative to the ratio of said isomers in said mixture prior to contacting it with said zeolite catalyst.
Claim 44
Dependent Claim
114 words
A process for the manufacture of 1,2-disubstituted aromatic compounds by the selective reaction of the 1,4-disubstituted isomer thereof from mixtures comprising both isomers, either alone or in admixture with other aromatic or non-aromatic materials, said process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a resulting product in which the ratio of the 1,2-isomer to the 1,4-isomer of said disubstituted aromatic compound is increased relative to the ratio of said isomers in said mixture prior to contacting it with said zeolite catalyst.
Claim 45
Dependent Claim
13 words
The process of claim 41 wherein said disubstituted aromatic compound is a dialkylbenzene.
Claim 46
Dependent Claim
10 words
The process of claim 42 wherein said dialkylbenzene is diisopropylbenzene.
Claim 47
Dependent Claim
10 words
The process of claim 42 wherein said dialkylbenzene is ethylmethylbenzene.
Claim 48
Dependent Claim
10 words
The process of claim 42 wherein said dialkylbenzene is diethylbenzene.
Claim 49
Dependent Claim
10 words
The process of claim 42 wherein said dialkylbenzene is t-butylmethylbenzene.
Claim 50
Dependent Claim
10 words
The process of claim 42 wherein said dialkylbenzene is isopropylmethylbenzene.
Claim 51
Dependent Claim
35 words
The process of claim 41 wherein said conversion conditions include a temperature between about 150° C. and about 800° C., a pressure between about 10 4 N/m 2 and about 10 7 N/m 2 .
Claim 52
Dependent Claim
35 words
The process of claim 41 wherein said conversion conditions include a temperature between about 250° C. and about 550° C., a pressure between about 2×10 4 N/m 2 and about 2.5×10 6 N/m 2 .
Claim 53
Dependent Claim
43 words
The process of claim 41 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 0.5 and about 40 weight percent of at least one oxide selected from the group consisting of the oxides of phosphorus, antimony, boron and magnesium.
Claim 54
Dependent Claim
29 words
The process of claim 41 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of phosphorus.
Claim 55
Dependent Claim
29 words
The process of claim 41 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of magnesium.
Claim 56
Dependent Claim
37 words
The process of claim 41 wherein said crystalline zeolite has undergone prior modification by steaming at a temperature between about 250° C. and about 1000° C. for a period of between about 0.5 and about 100 hours.
Claim 57
Dependent Claim
11 words
The process of claim 41 wherein said crystalline zeolite is ZSM-5.
Claim 58
Dependent Claim
14 words
The process of claim 54 wherein said ZSM-5 is admixed with a binder therefor.
Claim 59
Dependent Claim
11 words
The process of claim 41 wherein said crystalline zeolite is ZSM-11.
Claim 60
Dependent Claim
14 words
The process of claim 56 wherein said ZSM-11 is admixed with a binder therefor.
Claim 61
Dependent Claim
11 words
The process of claim 41 wherein said crystalline zeolite is ZSM-23.
Claim 62
Dependent Claim
14 words
The process of claim 58 wherein said ZSM-23 is admixed with a binder therefor.
Claim 63
Dependent Claim
26 words
The process of claim 41 wherein said mixture containing said disubstituted aromatic compounds is admixed with a diluent prior to contacting it with said zeolite catalyst.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |