US4185040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatic hydrocarbons
Assignee: Union Oil Company of California
•
Filing: 1977-12-16
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Granted: 1980-01-22
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Expires: 1997-12-16
Abstract
Abstract Highly stable and active catalysts are provided for the alkylation of aromatic hydrocarbons with C 2 -C 4 olefins. The catalysts are extruded composites of an acidic, crystalline aluminosilicate zeolite, e.g. Y zeolite, and a porous mineral oxide binder. The basic novel feature of the invention resides in the shape and size of the catalyst extrudates. By shaping the extrudates so as to give a high ratio of external surface area to volume, resistance to deactivation is found to be much improved, as well as activity and selectivity.
Inventors
- 👤 John W. Ward
- 👤 Texas V. Inwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:58
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
An alkylation process which comprises passing a mixture of a C 2 -C 4 olefin and a mole-excess of an alkylatable aromatic hydrocarbon through a fixed bed of an alkylation catalyst under alkylating conditions and recovering a desired alkylated hydrocarbon from the resulting product, said alkylation catalyst consisting essentially of a composite of an acidic crystalline aluminosilicate zeolite containing less than about 0.7 wt.% of Na 2 O and a porous mineral oxide binder, said composite being in the form of substantially uniform sized extrudates having a maximum overall diameter between 0.03 and 0.08 inch, a length between 0.1 and 0.25 inch, and having a ratio of external surface area to volume of between 85 and 160 reciprocal inches.
Claim 2
Dependent Claim
119 words
An alkylation process which comprises passing a mixture of a C 2 -C 4 olefin and a mole-excess of an alkylatable aromatic hydrocarbon through a fixed bed of an alkylation catalyst under alkylating conditions and recovering a desired alkylated hydrocarbon from the resulting product, said alkylation catalyst consisting essentially of a composite of an acidic crystalline aluminosilicate zeolite containing less than about 0.7 wt.% of Na 2 O and a porous mineral oxide binder, said composite being in the form of substantially uniform sized extrudates having a maximum overall diameter between 0.03 and 0.08 inch, a length between 0.1 and 0.25 inch, and having a ratio of external surface area to volume of between 85 and 160 reciprocal inches.
Claim 3
Dependent Claim
36 words
A process as defined in claim 1 wherein said aluminosilicate zeolite is a steam stabilized hydrogen Y zeolite having a unit cell size between about 24.40 and 24.64 A, and said mineral oxide binder is alumina.
Claim 4
Dependent Claim
27 words
A process as defined in claim 2 wherein the cross section of said extrudates embraces a plurality of arcuate lobes extending outwardly from the central portion thereof.
Claim 5
Dependent Claim
42 words
A process as defined in claim 2 wherein the cross section of said extrudates is in the shape of a trilobe wherein each lobe is defined by a 180°-270° arc of a circle having a diameter between about 0.02 and 0.04 inches.
Claim 6
Dependent Claim
26 words
A process as defined in claim 1 wherein the alkylating conditions of temperature and pressure are controlled to provide a liquid phase in the contacting zone.
Claim 7
Dependent Claim
27 words
A process as defined in claim 1 wherein the ratio of external surface area to volume of said extrudates is between about 90 and 150 reciprocal inches.
Claim 8
Dependent Claim
27 words
A process as defined in claim 1 wherein the cross section of said extrudates embraces a plurality of arcuate lobes extending outwardly from the central portion thereof.
Claim 9
Dependent Claim
42 words
A process as defined in claim 1 wherein the cross section of said extrudates is in the shape of a trilobe wherein each lobe is defined by a 180°-270° arc of a circle having a diameter between about 0.02 and 0.04 inches.
Claim 10
Dependent Claim
112 words
A process for the manufacture of ethylbenzene which comprises passing a mixture of ethylene and a mole-excess of benzene through a fixed bed of an alkylation catalyst under alkylating conditions and recovering ethylbenzene from the resulting product, said alkylation catalyst consisting essentially of a composite of an acidic crystalline aluminosilicate zeolite containing less than about 0.7 wt.% of Na 2 O and a porous mineral oxide binder, said composite being in the form of substantially uniform sized extrudates having a maximum overall diameter between 0.03 and 0.08 inch, a length between 0.1 and 0.25 inch, and having a ratio of external surface area to volume of between 85 and 160 reciprocal inches.
Claim 11
Dependent Claim
112 words
A process for the manufacture of ethylbenzene which comprises passing a mixture of ethylene and a mole-excess of benzene through a fixed bed of an alkylation catalyst under alkylating conditions and recovering ethylbenzene from the resulting product, said alkylation catalyst consisting essentially of a composite of an acidic crystalline aluminosilicate zeolite containing less than about 0.7 wt.% of Na 2 O and a porous mineral oxide binder, said composite being in the form of substantially uniform sized extrudates having a maximum overall diameter between 0.03 and 0.08 inch, a length between 0.1 and 0.25 inch, and having a ratio of external surface area to volume of between 85 and 160 reciprocal inches.
Claim 12
Dependent Claim
36 words
A process as defined in claim 9 wherein said aluminosilicate zeolite is a steam stabilized hydrogen Y zeolite having a unit cell size between about 24.40 and 24.64 A, and said mineral oxide binder is alumina.
Claim 13
Dependent Claim
27 words
A process as defined in claim 10 wherein the cross section of said extrudates embraces a plurality of arcuate lobes extending outwardly from the central portion thereof.
Claim 14
Dependent Claim
42 words
A process as defined in claim 10 wherein the cross section of said extrudates is in the shape of a trilobe wherein each lobe is defined by a 180°-270° arc of a circle having a diameter between about 0.02 and 0.04 inches.
Claim 15
Dependent Claim
26 words
A process as defined in claim 9 wherein the alkylating conditions of temperature and pressure are controlled to provide a liquid phase in the contacting zone.
Claim 16
Dependent Claim
27 words
A process as defined in claim 9 wherein the ratio of external surface area to volume of said extrudates is between about 90 and 150 reciprocal inches.
Claim 17
Dependent Claim
27 words
A process as defined in claim 9 wherein the cross section of said extrudates embraces a plurality of arcuate lobes extending outwardly from the central portion thereof.
Claim 18
Dependent Claim
42 words
A process as defined in claim 9 wherein the cross section of said extrudates is in the shape of a trilobe wherein each lobe is defined by a 180°-270° arc of a circle having a diameter between about 0.02 and 0.04 inches.
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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) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |