US4324698A
Expired / Lapsed
US
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Fluorided cracking catalyst
Assignee: Texaco Inc
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Filing: 1980-10-20
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Granted: 1982-04-13
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Expires: 2000-10-20
Abstract
Abstract An improved zeolite-containing cracking catalyst prepared by treating a zeolite-containing cracking catalyst with an aqueous solution containing a fluorine compound, drying and calcining the fluorided catalyst. In a preferred embodiment, the fluorinating solution is an aqueous solution of hydrogen fluoride. The fluorided catalyst may be used per se as a cracking catalyst, or may be physically mixed with a metallic reforming catalyst for use as a cracking catalyst. The fluorided cracking catalysts exhibit improved activity and yield higher octane products than unfluorided cracking catalysts.
Inventors
- 👤 Paul H. Lewis
- 👤 Joseph A. Durkin
- 👤 Joseph A. Froelich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:35
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/10; B01J29/12; B01J29/126; B01J27/00; B01J27/06; B01J27/08; B01J27/12; B01J29/084
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
An improved fluorided zeolite type cracking catalyst consisting essentially of at least 90 percent by weight of a composite of a Y-zeolite in a silica-alumina matrix and containing about 0.1 to about 5 percent by weight of fluorine, said improved cracking catalyst prepared by contacting said composite with an aqueous solution of a fluorine compound, in an amount just sufficient for incipient wetting of said composite for a period of 16 to 24 hours, drying, and calcining the resulting fluorided catalyst.
Claim 2
Dependent Claim
81 words
An improved fluorided zeolite type cracking catalyst consisting essentially of at least 90 percent by weight of a composite of a Y-zeolite in a silica-alumina matrix and containing about 0.1 to about 5 percent by weight of fluorine, said improved cracking catalyst prepared by contacting said composite with an aqueous solution of a fluorine compound, in an amount just sufficient for incipient wetting of said composite for a period of 16 to 24 hours, drying, and calcining the resulting fluorided catalyst.
Claim 3
Dependent Claim
33 words
An improved cracking catalyst in accordance with claim 1 wherein said fluorine compound is selected from the group consisting of hydrogen fluoride, ammonium fluoride, ammonium bifluoride, boron trifluoride, ammonium fluoborate, and ammonium fluosilicate.
Claim 4
Dependent Claim
16 words
An improved cracking catalyst in accordance with claim 2 wherein said fluorine compound is hydrogen fluoride.
Claim 5
Dependent Claim
21 words
An improved cracking catalyst in accordance with claim 1 wherein said fluorided catalyst contains about 1.0 percent by weight of fluoride.
Claim 6
Dependent Claim
39 words
An improved cracking catalyst according to claim 1 comprising from about 5 to about 10 percent by weight of a metallic reforming catalyst comprising from about 0.01 to about 2 percent by weight of platinum on an alumina support.
Claim 7
Dependent Claim
36 words
An improved cracking catalyst in accordance with claim 5 wherein said metallic reforming catalyst also contains a catalytically effective amount of a metal selected from the group consisting of tin, germanium, and rhenium on said support.
Claim 8
Dependent Claim
17 words
An improved cracking catalyst in accordance with claim 5 or 6 wherein said support is gamma alumina.
Claim 9
Dependent Claim
76 words
An improved method for the preparation of a fluorided zeolite cracking catalyst containing from about 0.1 to about 5 percent fluorine by weight which comprises contacting a composite of a Y zeolite in a silica-alumina matrix with an aqueous solution of a fluorine compound in an amount just sufficient to produce incipient wetness of said composite for a period of 16 to 24 hours at 32° F., and thereafter drying and calcining the resulting fluorided composite.
Claim 10
Dependent Claim
76 words
An improved method for the preparation of a fluorided zeolite cracking catalyst containing from about 0.1 to about 5 percent fluorine by weight which comprises contacting a composite of a Y zeolite in a silica-alumina matrix with an aqueous solution of a fluorine compound in an amount just sufficient to produce incipient wetness of said composite for a period of 16 to 24 hours at 32° F., and thereafter drying and calcining the resulting fluorided composite.
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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |