EP0285280A1
Expired / Lapsed
EP
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Process for selectively alkylating biphenyl
Assignee: Kureha Corp
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Filing: 1988-03-11
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Granted: —
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Expires: 2008-03-11
Abstract
Abstract The para-isomer of an alkylbiphenyl is selectively synthesised by the alkylation of biphenyl with propylene or butene employing, as a catalyst, a zeolite having a molar ratio of SiO₂:Al₂O₃ of not less than 10.
Inventors
- 👤 Tadashi Nakamura
- 👤 Shouichi Hoshi
- 👤 Yoshio Okada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:45
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/18; C07C2529/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
37 words
A process for the preparation of a para-isomer of an alkylbiphenyl which process comprises alkylating biphenyl with propylene or butene using, as a catalyst, a zeolite having a molar ratio of SiO₂:Al₂O₃ of not less than 10:1.
Claim 2
Dependent Claim
37 words
A process for the preparation of a para-isomer of an alkylbiphenyl which process comprises alkylating biphenyl with propylene or butene using, as a catalyst, a zeolite having a molar ratio of SiO₂:Al₂O₃ of not less than 10:1.
Claim 3
Dependent Claim
14 words
A process according to claim 1, wherein said zeolite is a Mordenite type zeolite.
Claim 4
Dependent Claim
14 words
A process according to claim 1, wherein said zeolite is a ZSM-5 type zeolite.
Claim 5
Dependent Claim
22 words
A process according to any one of the preceding claims, wherein the starting molar ratio of olefin:biphenyl is from 0.5:1 to 2.2:1.
Claim 6
Dependent Claim
19 words
A process according to any one of the preceding claims, wherein the reaction temperature is from 200 to 320°C.
Claim 7
Dependent Claim
21 words
A process according to any one of the preceding claims, wherein said molar ratio of SiO₂:Al₂O₃ is from 10:1 to 50:1.
Claim 8
Dependent Claim
24 words
A process according to any one of the preceding claims, wherein the alkylation is conducted with propylene and the para-isopropylbiphenyl thus produced is recovered.
Claim 9
Dependent Claim
25 words
A process according to any one of claims 1 to 6, wherein the alkylation is conducted with propylene and the 4,4ʹ-di-isopropylbiphenyl thus produced is recovered.
Claim 10
Dependent Claim
25 words
A process according to any one of claims 1 to 6, wherein the alkylation is conducted with butene and the para-sec-butylbiphenyl thus produced is recovered.
Claim 11
Dependent Claim
25 words
A process according to any one of claims 1 to 6, wherein the alkylation is conducted with butene and the 4,4ʹ-di-sec-butylbiphenyl thus produced is recovered.
References Cited (Backward Citations)
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