US4172813A
Expired / Lapsed
US
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Process for selectively hydrodealkylating/transalkylating heavy reformate
Assignee: BP Corp North America Inc
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Filing: 1977-11-08
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Granted: 1979-10-30
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Expires: 1997-11-08
Abstract
Abstract Fractionated heavy reformate containing ethyltoluenes and propylbenzenes is selectively hydrodealkylated and transalkylated to produce ethylbenzene-lean xylenes, benzene and C 2 -C 4 paraffins in the presence of a catalyst comprising a tungsten/molybdenum component of WO 3 and MoO 3 and an acidic component of 60 (wt)% of mordenite and 40 (wt)% of catalytically active alumina.
Inventors
- 👤 Allen I. Feinstein
- 👤 Ralph J. Bertolacini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18; B01J29/26; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/28; C07C2523/30; C10; C10G; C10G2400/00; C10G2400/30; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A process for producing ethylbenzene-lean xylenes, benzene, and C 2 -C 4 paraffins wherein a C 9 -aromatics stream comprising trimethylbenzenes, ethyltoluenes, propylbenzenes, indane and C 10 paraffins/naphthenes is fractionated from heavy reformate, mixed with a hydrogen-affording gas, and subjected to a hydrodealkylation/transalkylation reaction under conditions including a temperature within the range of from 600° to about 1000° F., a pressure in the range of from about 100 to 500 psig, a hydrogen-to-hydrocarbon mole ratio of from about 4:1 to 20:1, a contact time of from about 1 to 20 seconds and a catalyst composition consisting essentially of a tungsten/molybdenum component of WO 3 and MoO 3 with an acidic component of mordenite on a high surface area alumina support.
Claim 2
Dependent Claim
120 words
A process for producing ethylbenzene-lean xylenes, benzene, and C 2 -C 4 paraffins wherein a C 9 -aromatics stream comprising trimethylbenzenes, ethyltoluenes, propylbenzenes, indane and C 10 paraffins/naphthenes is fractionated from heavy reformate, mixed with a hydrogen-affording gas, and subjected to a hydrodealkylation/transalkylation reaction under conditions including a temperature within the range of from 600° to about 1000° F., a pressure in the range of from about 100 to 500 psig, a hydrogen-to-hydrocarbon mole ratio of from about 4:1 to 20:1, a contact time of from about 1 to 20 seconds and a catalyst composition consisting essentially of a tungsten/molybdenum component of WO 3 and MoO 3 with an acidic component of mordenite on a high surface area alumina support.
Claim 3
Dependent Claim
62 words
The process of claim 1 wherein the said tungsten/molybdenum component comprises tungsten being present in an amount within the range of from about 1 to 10 (wt) percent expressed as WO 3 and molybdenum being present in an amount within the range of from about 1 to 20 (wt.)%, expressed as MoO 3 and based upon the weight of the catalytic composition.
Claim 4
Dependent Claim
55 words
The process of claim 1 wherein the said acidic component of mordenite and high surface area alumina comprises the said mordenite being present in an amount within the range of from 5 to about 95 (wt.)% and the catalytically active alumina being present in an amount within the range of from 95 to 5 (wt.)%.
Claim 5
Dependent Claim
53 words
The process of claim 1 wherein the said catalyst composition comprises a tungsten/molybdenum component of 3 (wt.)% WO 3 and 5 (wt.)% MoO 3 of total weight of said catalytic composition and an acidic component comprising 60 (wt.)% mordenite and 40 (wt.)% catalytically active alumina of total weight of said acidic cracking component.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein the said mordenite is in the hydrogen form and the said alumina is gamma alumina.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said catalyst composition comprises the sulfided form.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein the said reaction products are separated from unreacted feedstocks.
Claim 9
Dependent Claim
22 words
The process of claim 1 wherein the toluene is admixed with reformate C 9 aromatics as the fresh feed to the process.
Claim 10
Dependent Claim
27 words
The process of claim 1 wherein the said hydrogen-to-hydrocarbon mole ratio is from about 5:1 to 9:1 at pressures of from about 150 to 250 psig respectively.
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein the said contact time is from 3 to 10 seconds.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein the said temperature is within the range from about 800° to 900° F.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |