US3714029A
Expired / Lapsed
US
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Zinc-containing zeolite catalyst
Assignee: Shell USA Inc
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Filing: 1971-09-15
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Granted: 1973-01-30
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Expires: 1991-09-15
Abstract
Abstract A crystalline-alumino-silicate zeolite catalyst support having high crystalline stability and acidic catalytic activity is prepared from an alkali zeolite, preferably a Y-faujasite, by (1) removing the alkali metal ions to below about 1.0%w by ion exchange, and (2) incorporating zinc ions and calcining at a high temperature of about 800*C. The support can then be combined with hydrogenative metals such as Group VIII and Group VIB, followed by drying and calcining to provide superior hydroisomerization and hydrocracking catalysts.
Inventors
- 👤 T Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:12
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A process for the hydroconversion of a hydrocarbon fraction which comprises contacting a hydrocarbon feedstock in the presence of hydrogen under suitable hydroconversion conditions with a catalyst which comprises a hydrogenation component selected from the group consisting of Group VIB and Group VIII and mixtures thereof, a zinc-containing crystalline alumino-silicate zeolite having faujasite structure and alkali metal content of less than 1%w, prepared by a method which comprises: a. removing alkali metal ions from an alkali metal form of zeolite having a faujasite structure to a level below about 1%w; b. incorporating zinc ions into the zeolite of reduced alkali metal content, followed by c. calcining at a temperature between about 775* to 825*C.
Claim 2
Dependent Claim
114 words
A process for the hydroconversion of a hydrocarbon fraction which comprises contacting a hydrocarbon feedstock in the presence of hydrogen under suitable hydroconversion conditions with a catalyst which comprises a hydrogenation component selected from the group consisting of Group VIB and Group VIII and mixtures thereof, a zinc-containing crystalline alumino-silicate zeolite having faujasite structure and alkali metal content of less than 1%w, prepared by a method which comprises: a. removing alkali metal ions from an alkali metal form of zeolite having a faujasite structure to a level below about 1%w; b. incorporating zinc ions into the zeolite of reduced alkali metal content, followed by c. calcining at a temperature between about 775* to 825*C.
Claim 3
Dependent Claim
73 words
The process of claim 1 wherein the hydroconversion is the hydroisomerization of normal paraffin hydrocarbons havIng from four to seven carbon atoms, the hydroisomerization conditions include a temperature of about 200* to 350*C, a pressure from about 300 to 750 psig, a hydrogen to oil molar ratio from about 1/1 to 25/1, and a weight hourly space velocity from about 0.5 to 10 and the hydrocarbon component is a Group VIII noble metal.
Claim 4
Dependent Claim
65 words
The process of claim 1 wherein the hydroconversion is the hydrocracking of a feedstock boiling substantially above the boiling range of the desired products, the hydrocracking conditions include a temperature of about 260* to 450*C, at a hydrogen partial pressure of about 500 to 2000 psig, a hydrogen to oil molar ratio of about 5 to 50 and an LHSV of about 0.5 to 5.
Claim 5
Dependent Claim
28 words
The process of claim 2 wherein the zeolite is washed to remove unexchanged ions after step (b) and incorporated with a hydrogenation component consisting of platinum or palladium.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein the wash solution is ammonium nitrate.
Claim 7
Dependent Claim
31 words
The process of claim 3 wherein the zeolite is washed to remove unexchanged ions after step (b) and incorporated with a hydrogenation component consisting of nickel and tungsten after step (c).
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |