US5026941A
Expired / Lapsed
US
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Y zeolite catalyst
Assignee: Tosoh Corp
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Filing: 1990-10-26
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Granted: 1991-06-25
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Expires: 2010-10-26
Abstract
Abstract A catalyst comprising a Y zeolite of which silica/alumina molar ratio ranges from 15 to 110, use of this catalyst for alkylation of monoisopropylnaphthalene and a method for preparation of this catalyst comprising treating a Y zeolite with an acid(s) to adjust the silica/alumina molar ratio to 15 to 110 are disclosed. A method for preparation of mono and/or diisopropylnaphthalenes comprising reacting naphthalene and/or monoisopropylnaphthalene with propylene in the presence of at least one saturated polycarbocyclic compounds and a catalyst comprising a Y zeolite having the silica/alumina molar ratio of from 10 to 350 are disclosed. This catalyst makes possible the production of β-monoisopropylnaphthalene in good yield by alkylation of naphthalene and the production of β-monoisopropylnaphthalene and/or 2,6- and 2,7-diisopropylnaphthalenes in good yield by alkylation of naphthalene and/or monoisopropylnaphthalene in good percent conversion.
Inventors
- 👤 Motohiro Oguri
- 👤 Yoshiaki Kano
- 👤 Kiyotaka Mishima
- 👤 Masahiko Yamada
- 👤 Kenji Kasano
- 👤 Masaru Uemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:19
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; B01J2229/00; B01J2229/10; B01J2229/16; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
42 words
A method for preparation of mono and/or diisopropylnaphthalenes comprising reacting naphthalene and/or monoisopropylnaphthalene with propylene. in the presence of at least one saturated polycarbocyclic compound and a catalyst comprising a Y zeolite having the silica/alumina molar ratio of from 10 to 350.
Claim 2
Independent Claim
42 words
A method for preparation of mono and/or diisopropylnaphthalenes comprising reacting naphthalene and/or monoisopropylnaphthalene with propylene. in the presence of at least one saturated polycarbocyclic compound and a catalyst comprising a Y zeolite having the silica/alumina molar ratio of from 10 to 350.
Claim 3
Dependent Claim
15 words
A method of claim 1 wherein the silica/alumina molar ratio ranges from 20 to 100.
Claim 4
Dependent Claim
16 words
A method of claim 1 wherein the reaction is carried out at 160° to 300° C.
Claim 5
Dependent Claim
19 words
A method of claim 1 wherein the reaction is carried out under pressure of 0.5 kg/cm 2 or more.
Claim 6
Dependent Claim
32 words
A method of claim 1 wherein the saturated polycarbocyclic compound(s) is used int he range of from 0.05 to 10 (weight ratio on the basis of the weight of naphthalene and/or monoisopropylnaphthalene).
Claim 7
Dependent Claim
38 words
A method of claim 1 wherein the saturated polycarbocyclic compound is selected from the group consisting of polycarbocyclic compounds with separate ring-systems, polycarbocyclic compounds with combined ring-systems, polycarbocyclic compounds with fused ring-systems and polycarbocyclic compounds with bridged ring-systems.
Claim 8
Dependent Claim
34 words
A method of claim 1 wherein the saturated polycarbocyclic compound is selected from the group consisting of bicyclopropyl, bicyclopentyl, bicyclohexyl, cyclopentylcyclohexane, spiro[2,2]heptane, spiro[2,3]hexane, spiro[2,4]heptane, spiro[3,3]heptane, spiro[3,4]octane, bicyclo[4,2,0]octanehydroindane, decalin, perhydrophenanthroline, perhydroanthracene, norpinane, norbornane and bicyclo[2,2,1]octane.
Claim 9
Dependent Claim
21 words
A method of claim 6 the saturated polycarbocyclic compound is polycarbocyclic compounds with fused ring-systems or polycarbocyclic compounds with separate ring-systems.
Claim 10
Dependent Claim
14 words
A method of claim 7 wherein the saturated polycarbocyclic compound is decalin or bicyclohexyl.
Claim 11
Independent Claim
31 words
A method for preparation of diisopropylnaphthalenes comprising reacting monoisopropylnaphthalene with propylene in the presence of a catalyst comprising a Y zeolite wherein the silica/alumina molar ratio ranges from 15 to 110.
Claim 12
Independent Claim
31 words
A method for preparation of diisopropylnaphthalenes comprising reacting monoisopropylnaphthalene with propylene in the presence of a catalyst comprising a Y zeolite wherein the silica/alumina molar ratio ranges from 15 to 110.
Claim 13
Dependent Claim
15 words
A method of claim 10, wherein the silica/alumina molar ratio ranges from 20 to 80.
Claim 14
Dependent Claim
14 words
A method of claim 10, wherein the Y zeolite is an ultrastable Y zeolite.
Claim 15
Dependent Claim
16 words
A method of claim 10 wherein the reaction is carried out at 160° to 300° C.
Claim 16
Dependent Claim
26 words
A method of claim 10 wherein the reaction is carried out by controlling the weight hourly space velocity (WHSV) within 0.2 to 50 Hr -1 .
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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) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |