US4570027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatic molecules using a silica-alumina catalyst derived from zeolite
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1984-04-27
•
Granted: 1986-02-11
•
Expires: 2004-04-27
Abstract
Abstract Aromatic molecules are alkylated using a silica-alumina catalyst derived from zeolite. The silica-alumina catalyst is a partially collapsed zeolite, i.e., a material of reduced crystallinity. The alkylation process which employs this material of reduced crystallinity is characterized by a high level of selectivity for the production of monoalkylated product.
Inventors
- 👤 Heather A. Boucher
- 👤 Ian A. Cody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:41
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
25 words
A method for producing alkylaromatic hydrocarbons comprising contacting an aromatic hydrocarbon with an alkylating agent in the presence of a low crystallinity, partially collapsed zeolite.
Claim 2
Independent Claim
25 words
A method for producing alkylaromatic hydrocarbons comprising contacting an aromatic hydrocarbon with an alkylating agent in the presence of a low crystallinity, partially collapsed zeolite.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the low crystallinity partially collapsed zeolite is a partially collapsed wide pore zeolite.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein the low crystallinity, partially collapsed zeolite possesses about 30 to 80% retained crystallinity as determined by XRD.
Claim 5
Dependent Claim
25 words
The method of claim 2 wherein the low crystallinity, partially collapsed wide pore zeolite possesses about 30 to 80% retained crystallinity as determined by XRD.
Claim 6
Dependent Claim
21 words
The method of claim 3 wherein the low crystallinity, partially collapsed zeolite possesses about 50% retained crystallinity as determined by XRD.
Claim 7
Dependent Claim
23 words
The method of claim 4 wherein the low crystallinity, partially collapsed wide pore zeolite possesses about 50% retained crystallinity as determined by XRD.
Claim 8
Dependent Claim
23 words
The method of claim 1, 2, 3, 4, 5 or 6 wherein the aromatic hydrocarbon is a mono or poly nuclear aromatic hydrocarbon.
Claim 9
Dependent Claim
33 words
The method of claim 7 wherein the aromatic hydrocarbon is selected from benzene, toluene, o-, m- and p-xylene, ethylbenzene, n- and iso-propyl benzene, n, iso- and tert-butylbenzene, tetralin, alkyltetralin, naphthalene and alkyl naphthalenes.
Claim 10
Dependent Claim
18 words
The method of claim 8 wherein the aromatic hydrocarbon is benzene, toluene, o-, m- or p-xylene or ethylbenzene.
Claim 11
Dependent Claim
13 words
The method of claim 9 wherein the aromatic hydrocarbon is benzene or ethylbenzene.
Claim 12
Dependent Claim
23 words
The method of claim 1, 2, 3, 4, 5 or 6 wherein the alkylating agent is a C 3 to C 20 olefin.
Claim 13
Dependent Claim
17 words
The method of claim 7 wherein the alkylating agent is a C 3 to C 20 olefin.
Claim 14
Dependent Claim
17 words
The method of claim 8 wherein the alkylating agent is a C 3 to C 20 olefin.
Claim 15
Dependent Claim
17 words
The method of claim 9 wherein the alkylating agent is a C 10 to C 20 olefin.
Claim 16
Dependent Claim
17 words
The method of claim 10 wherein the alkylating agent is a C 10 to C 20 olefin.
Claim 17
Dependent Claim
67 words
The method of claim 1, 2, 3, 4, 5 or 6 wherein the alkylating reaction is conducted at a temperature of between about 50° to 200° C., at a pressure of about 0 to 2000 psig, at a space velocity (WHSV gm olefin:gm catalyst/hr) of about 0.1 to 10 hr -1 at a molar ratio of aromatic to alkylating agent starting material of about 1:1 to 10:1.
Claim 18
Dependent Claim
16 words
The method of claim 16 wherein the low crystallinity partially collapsed zeolite is a zeolite Y.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |