US3617486A
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Hydrocrackfining of hydrocarbon fractions over mixed metal catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-11-25
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Granted: 1971-11-02
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Expires: 1989-11-25
Abstract
Abstract A process for upgrading low octane heavy naphtha, such as a 350*-430* F. cut from a conventional hydrocracking operation, or normally virgin crude fractions used to prepare premium jet fuel and middle distillate, as well as mixtures of the cracked and virgin fractions. By treating such hydrocarbons, e.g., the 350*430* F. cut, alone or in admixture with other hydrocarbons, with a dual functional catalyst composition comprising a metal hydrogenation component composited with a crystalline aluminosilicate zeolite cracking component, product quality is upgraded. The conditions utilized in the process are less severe than that normally utilized in a hydrocracking operation but more severe than generally employed in hydrocracking operations so as to result in the conversion of the 350*-430* F. hydrocrackate fraction into a high-octane number C5- 350* F. naphtha. This C5350* F. naphtha product is amenable to further improvement by powerforming and/or special recycle. Catalysts which are of special interest in the practice of the ''''hydrocrackfining process'''' comprise the mixed nonnoble metal catalysts supported on crystalline aluminosilicate zeolites having a silica-toalumina mole ratio greater than 3.
Inventors
- 👤 William R Lewis
- 👤 Ralph B Mason
- 👤 Glen P Hamner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:39
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/12; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C10G2400/00; C10G2400/02; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
51 words
The process of claim 1 wherein the 350*-430* F. fraction submitted to hydrocrackfining conditions is admixed with a low grade virgin crude fraction normally used to prepare premium jet fuel and middle distillate, the said virgin crude fraction being added in the proportions of from about 10 to about 80 percent.
Claim 2
Dependent Claim
22 words
The process of claim 2 wherein the virgin crude fraction is added in proportions of from about 20 to about 90 percent.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the conversion of the 350*-430* F. distillate fraction at hydrocrackfining conditions ranges no more than from about 5 to about 7.5 weight percent butane and lighter.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein the hydrocrackfinate is further fractionated into a C5-180* F. fraction, a 180*-375* F. fraction and a 375*-430* F. fraction.
Claim 5
Dependent Claim
41 words
The process of claim 1 wherein said hydrogenation component of said hydrocrackfining catalyst comprises a mixture of nonnoble metals and said zeolite component, upon which the mixture is supported, has a crystalline structure with a silica-to-alumina mole ratio greater than 3.
Claim 6
Dependent Claim
29 words
The process of claim 6 wherein said hydrogenation component of said hydrocracking catalyst comprises two nonnoble metals, the first selected from Groups II-B and VIII of the periodic table.
Claim 7
Dependent Claim
40 words
The process of claim 1 wherein the hydrocrackfining catalyst consists of a first nonnoble metal selected from the group consisting of zinc, nickel and cobalt, and a second nonnoble metal selected from the group consisting of molybdenum, tungsten and tin.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein said hycrocrackfining catalyst is sulfided prior to contact with said feed.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein said hydrocrackfining catalyst comprises a nickel molybdate faujasite zeolite.
Claim 10
Dependent Claim
17 words
The process as defined in claim 1 wherein said hydrocrackfining catalyst comprises a zinc molybdate faujasite zeolite.
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein said hydrocrackfining catalyst comprises a nickel tungstate faujasite zeolite.
Claim 12
Dependent Claim
15 words
The process of claim 1 wherein said hydrocrackfining catalyst comprises a cobalt molybdate faujasite zeolite.
Claim 13
Dependent Claim
17 words
The process of claim 1 wherein said hydrocrackfining catalyst comprises a palladium hydrogenation component on hydroGen faujasite.
Claim 14
Dependent Claim
19 words
The process of claim 1 wherein the said hydrocracking catalyst comprises a palladium hydrogenation component on steamed hydrogen faujasite.
Claim 15
Dependent Claim
25 words
The process of claim 1 wherein said hydrocrackfining conditions comprise the following ranges: Temperature, *F. 400*-750* Pressure, p.s.i.g. 200-1,500LHSV, V/V/Hr. 0.2-10 Hydrogen Rate, SCF/B 500-10,000
Claim 16
Dependent Claim
165 words
In a hydrocracking process, the combination of steps comprising contacting a heavy hydrocarbon feed, in the presence of added hydrogen, in a plurality of stages, with a catalyst at hydrocracking conditions at severities sufficient to convert essentially all of the said feed to products of lower boiling range, distilling, and separating the distillate into products including a fraction boiling within the range of from about 350 * F. to about 430* F., subjecting the said 350*-430* F. fraction to low severity hydrocrackfining conditions wherein not more than 10 weight percent of the fraction is converted to butane and lighter products, by contacting said fraction, in the presence of added hydrogen, with a catalyst comprising a metal hydrogenation component and a crystalline aluminosilicate zeolite cracking component, at a temperature ranging from about 400* F. to about 750* F. and a pressure ranging from about 200 p.s.i.g. to about 1,500 p.s.i.g., and recovering a lower boiling naphtha having a higher octane value than said product distillate fraction.
Claim 17
Dependent Claim
52 words
The process of claim 17 wherein two hydrocracking stages are employed, the first operated to obtain from about 20-60 weight percent, and the second operated to obtain from about 80-40 weight percent conversion, based on feed, essentially complete conversion of the heavy hydrocarbon feed being obtained by recycling uncracked feed to extinction.
Claim 18
Dependent Claim
28 words
The process of claim 18 wherein not more than from about 5 to about 7.5 weight percent of the hydrocrackfined fraction is converted to butane and lighter products.
Claim 19
Dependent Claim
50 words
The process of claim 18 wherein the 350*-430* F. fraction submitted to hydrocrackfining conditions is admixed with a low-grade virgin crude fraction normally used to prepare premium jet fuel and middle distillate, the said virgin crude fraction being added in the proportions of from about 10 to about 80 percent.
Claim 20
Dependent Claim
44 words
The process of claim 20 wherein the fraction admixed with the 350*-430* F. fraction is a heavy cracked naphtha consisting of a blend of about 60 percent heavy catalytic naphtha, about 15 percent heavy coker naphtha and about 25 percent heavy steam cracked naphtha.
Claim 21
Dependent Claim
46 words
The process of claim 21 wherein the hydrocrackfining runs are made at treating temperatures of about 650*-675* F., about 500*-1,000 p.s.i.g., feed rates of about 1-2 volumes of feed per volume of catalyst per hour, and hydrogen gas rates of about 2, 000-4,000 SCF per barrel.
Claim 22
Dependent Claim
21 words
The process of claim 22 wherein the hydrocrackfining catalyst employed is selected from the group consisting of Pd-H-faujasite and Pd-Mg-H faujasite.
Claim 23
Dependent Claim
18 words
The process of claim 22 wherein the hydrocrackfining catalyst employed is selected from the group consisting of Zn-Mo-H-faujasite.
Claim 24
Dependent Claim
18 words
The process of claim 22 wherein the hydrocrackfining catalyst employed is selected from the group consisting of Ni-W-H-faujasite.
Claim 25
Dependent Claim
18 words
The process of claim 22 wherein the hydrocrackfining catalyst employed is selected from the group consisting of Co-Mo-H-faujasite.
References Cited (Backward Citations)
US3239447A
Cited
US3392106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |