US4665043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrothermal zeolite activation
Assignee: Mobil Oil AS
•
Filing: 1986-09-16
•
Granted: 1987-05-12
•
Expires: 2006-09-16
Abstract
Abstract The acid activity of a high silica content crystalline zeolite that contains framework boron is increased by hydrolyzing a portion of the boron and compositing the crystals with a binder that contains alumina.
Inventors
- 👤 Pochen Chu
- 👤 Guenter H. Kuehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:05
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/86
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
97 words
An improved method for enhancing the catalytic activity of a composition consisting essentially of crystals of a high silica content crystalline zeolite that contains from about 0.1 wt % to about 2.5 wt % of framework boron, said crystals having a silica to alumina mole ratio of at least 100, which method comprises simultaneously treating and compositing said crystals under hydrous conditions with fine particles of an alumina-containing material whereby from about 10% to about 95% of said boron is hydrolyzed and said catalytic activity is increased, and recovering said composited treated crystals of enhanced catalytic activity.
Claim 2
Dependent Claim
97 words
An improved method for enhancing the catalytic activity of a composition consisting essentially of crystals of a high silica content crystalline zeolite that contains from about 0.1 wt % to about 2.5 wt % of framework boron, said crystals having a silica to alumina mole ratio of at least 100, which method comprises simultaneously treating and compositing said crystals under hydrous conditions with fine particles of an alumina-containing material whereby from about 10% to about 95% of said boron is hydrolyzed and said catalytic activity is increased, and recovering said composited treated crystals of enhanced catalytic activity.
Claim 3
Dependent Claim
22 words
The method described in claim 1 wherein said high silica content crystalline zeolite has a Constraint Index of from 1 to 12.
Claim 4
Dependent Claim
38 words
The method described in claim 2 wherein said high silica crystalline zeolite has a silica to alumina ratio greater than about 500 and is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 5
Dependent Claim
13 words
The method described in claim 3 wherein said zeolite is ZSM-5 or ZSM-11.
Claim 6
Dependent Claim
22 words
The method described in claim 1 wherein said crystals are converted to the hydrogen form prior to said simultaneous treating and compositing.
Claim 7
Dependent Claim
22 words
The method described in claim 2 wherein said crystals are converted to the hydrogen form prior to said simultaneous treating and compositing.
Claim 8
Dependent Claim
18 words
The method described in claim 1 wherein said alumina is an aqueous alumina sol or alpha alumina monohydrate.
Claim 9
Dependent Claim
18 words
The method described in claim 2 wherein said alumina is an aqueous alumina sol or alpha alumina monohydrate.
Claim 10
Dependent Claim
18 words
The method described in claim 5 wherein said alumina is an aqueous alumina sol or alpha alumina monohydrate.
Claim 11
Dependent Claim
18 words
The method described in claim 6 wherein said alumina is an aqueous alumina sol or alpha alumina monohydrate.
Claim 12
Dependent Claim
9 words
The product produced by the method of claim 1.
Claim 13
Dependent Claim
9 words
The product produced by the method of claim 2.
Claim 14
Dependent Claim
9 words
The product produced by the method of claim 3.
Claim 15
Dependent Claim
9 words
The product produced by the method of claim 4.
Claim 16
Dependent Claim
9 words
The product produced by the method of claim 5.
Claim 17
Dependent Claim
9 words
The product produced by the method of claim 6.
Claim 18
Dependent Claim
9 words
The product produced by the method of claim 7.
Claim 19
Dependent Claim
9 words
The product produced by the method of claim 8.
Claim 20
Dependent Claim
9 words
The product produced by the method of claim 9.
Claim 21
Dependent Claim
9 words
The product produced by the method of claim 10.
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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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |