US4954653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst on the basis of silicon and titanium having high mechanical strength and a process for its preparation
Assignee: Enichem Sintesi SpA
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Filing: 1989-06-07
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Granted: 1990-09-04
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Expires: 2009-06-07
Abstract
Abstract The invention discloses a catalyst on the basis of silicon and titanium having the form of microspheres and constituted by oligomeric silica and by titanium-silica-lite crystals having an oligomeric silica/titanium-silicalite molar ratio comprised within the range of from 0.05 to 0.11, wherein the crystals of titanium-silicalite are encaged by means of Si-O-Si bridges.
Inventors
- 👤 Giuseppe Bellussi
- 👤 Franco Buonomo
- 👤 Antonio Esposito
- 👤 Mario Clerici
- 👤 Ugo Romano
- 👤 Bruno Notari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:32
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/04; B; B01; B01J; B01J29/00; B01J29/89; C07C; C07C37/00; C07C37/60; C07C41/00; C07C41/01; C07C41/18; C07C41/26; C07D301/00; C07D301/02; C07D301/03; C07D301/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
A method for the hydroxylation of aromatic hydrocarbons which comprises reacting a hydrocarbon with hydrogen peroxide in the presence of a catalyst said catalyst in the form of microspheres and comprising oligomeric silica and crystals of titanium-silicalite with an oligomeric silica/titanium-silicalite molar ratio in the rang of from 0.05 to 0.11, wherein said crystals of titanium silicalite are encaged with each other by means of Si-O-Si bridges.
Claim 2
Independent Claim
67 words
A method for the hydroxylation of aromatic hydrocarbons which comprises reacting a hydrocarbon with hydrogen peroxide in the presence of a catalyst said catalyst in the form of microspheres and comprising oligomeric silica and crystals of titanium-silicalite with an oligomeric silica/titanium-silicalite molar ratio in the rang of from 0.05 to 0.11, wherein said crystals of titanium silicalite are encaged with each other by means of Si-O-Si bridges.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein said microspheres have a diameter of from 5 to 1000 μm.
Claim 4
Dependent Claim
24 words
A method according to claim 1, wherein said hydroxylation is carried out at a temperature within the range of from 80° to 120° C.
Claim 5
Dependent Claim
25 words
A method according to claim 1, wherein said aromatic hydrocarbons are selected from the group consisting of phenol, anisole, toluene, benzene, acetanilide, chlorobenzene and nitrogenzene.
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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |