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Patent US3902991A successfully refreshed from Google Patents.
US3902991A
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Hydrodesulfurization process for the production of low-sulfur hydrocarbon mixture
Assignee: Chevron USA Inc
•
Filing: 1973-04-27
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Granted: 1975-09-02
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Expires: 1993-04-27
Abstract
Abstract Low-sulfur content hydrocarbon mixture and fuel oil blend below 0.2 or below 0.1 wt. % sulfur are obtained by hydrodesulfurizing vacuum gas oil under a hydrogen partial pressure of 300 - 800 psig. with a select high activity desulfurization catalyst. Further embodiments include the hydrodesulfurization of sulfurcontaining vacuum residuum and (1) mixing portions of the desulfurized hydrocarbon residuum with the vacuum gas oil feed or (2) blending fuel oil from portions of the desulfurized vacuum gas oil and desulfurized vacuum residuum product. Further process steps include (3) deasphalting of vacuum residuum or (4) hydrodesulfurizing vacuum residuum with delayed coking of at least a portion of the product.
Inventors
- 👤 Robert I Christensen
- 👤 George D Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:05
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J35/00; B01J35/60; B01J35/63; B01J35/635; B01J35/64; B01J35/647; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 76
Claim 1
Independent Claim
35 words
A PROCESS FOR PRODUCING A LOW-SULFUR HYDROCARBON MIXTURE BY DESULFURIZING A HYDROCARBON FEEDSTOCK, SAID FEEDSTOCK BEING A REDUCED-CRUDE OBTAINED FROMA WHOLE CRUDE OIL HAVING A SULFUR OF AT LEAST ABOUT 1 WEIGHT PERCENT, WHICH COMPRISES:
Claim 2
Dependent Claim
35 words
A PROCESS FOR PRODUCING A LOW-SULFUR HYDROCARBON MIXTURE BY DESULFURIZING A HYDROCARBON FEEDSTOCK, SAID FEEDSTOCK BEING A REDUCED-CRUDE OBTAINED FROMA WHOLE CRUDE OIL HAVING A SULFUR OF AT LEAST ABOUT 1 WEIGHT PERCENT, WHICH COMPRISES:
Claim 3
Dependent Claim
14 words
SEPARATING SAID FEEDSTOCK INTO A VACUUM GAS OIL FRACTION AND A VACUUM RESIDUUM FRACTION,
Claim 4
Dependent Claim
14 words
SEPARATING SAID FEEDSTOCK INTO A VACUUM GAS OIL FRACTION AND A VACUUM RESIDUUM FRACTION,
Claim 5
Dependent Claim
110 words
CONTACTING AT LEAST A PORTION OF SAID VACUUM GAS OIL FRACTION WITH A SELECT HIGH ACTIVITY DESULFURIZATION CATALYST AND HYDROGEN GAS IN A FIRST HYDRODESULFURIZATION ZONE UNDER A HYDROGEN PARTIAL PRESSURE IN THE RANGE 300 TO 800 PSIG, SAID CATALYST COMPRISING A SULFIDED COMPOSITE CONTAINING COBALT, MOLYBDENUM, PHOSPHORUS AND ALUMINA AND A PORE VOLUME OF AT LEAST 0.5 CC PER GRAM OF SAID COMPOSITE, SAID PORES HAVING AN AVERAGE PORE DIAMETER IN THE RANGE 80 TO 120A WITH AT LEAST 50 PERCENT OF SAID PORES HAVING A DIAMETER IN THE RANGE 65 TO 150A, AND SAID COMPOSITE HAVING AN ATOMIC RATIO OF COBALT TO MOLYBDENUM RANGE 0.3 TO 0.6., AND
Claim 6
Dependent Claim
110 words
CONTACTING AT LEAST A PORTION OF SAID VACUUM GAS OIL FRACTION WITH A SELECT HIGH ACTIVITY DESULFURIZATION CATALYST AND HYDROGEN GAS IN A FIRST HYDRODESULFURIZATION ZONE UNDER A HYDROGEN PARTIAL PRESSURE IN THE RANGE 300 TO 800 PSIG, SAID CATALYST COMPRISING A SULFIDED COMPOSITE CONTAINING COBALT, MOLYBDENUM, PHOSPHORUS AND ALUMINA AND A PORE VOLUME OF AT LEAST 0.5 CC PER GRAM OF SAID COMPOSITE, SAID PORES HAVING AN AVERAGE PORE DIAMETER IN THE RANGE 80 TO 120A WITH AT LEAST 50 PERCENT OF SAID PORES HAVING A DIAMETER IN THE RANGE 65 TO 150A, AND SAID COMPOSITE HAVING AN ATOMIC RATIO OF COBALT TO MOLYBDENUM RANGE 0.3 TO 0.6., AND
Claim 7
Dependent Claim
112 words
contacting at least a portion of said vacuum gas oil fraction with a select high activity desulfurization catalyst and hydrogen gas in a first hydrodesulfurization zone under a hydrogen partial pressure in the range 300 to 800 psig, said catalyst comprising a sulfided composite containing cobalt, molybdenum, phosphorus and alumina and a pore volume of at least 0.5 cc per gram of said composite, said pores having an average pore diameter in the range 80 to 120A with at least 50 percent of said pores having a diameter in the range 65 to 150A, and said composite having an atomic ratio of cobalt to molybdenum in the range 0.3 to 0.6; and
Claim 8
Dependent Claim
112 words
contacting at least a portion of said vacuum gas oil fraction with a select high activity desulfurization catalyst and hydrogen gas in a first hydrodesulfurization zone under a hydrogen partial pressure in the range 300 to 800 psig, said catalyst comprising a sulfided composite containing cobalt, molybdenum, phosphorus and alumina and a pore volume of at least 0.5 cc per gram of said composite, said pores having an average pore diameter in the range 80 to 120A with at least 50 percent of said pores having a diameter in the range 65 to 150A, and said composite having an atomic ratio of cobalt to molybdenum in the range 0.3 to 0.6; and
Claim 9
Dependent Claim
20 words
A process as in claim 1 wherein said 350*F.+ portion has a sulfur content in the range 0.005 to 0.2.
Claim 10
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 11
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 12
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a coker fractionator;
Claim 13
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a coker fractionator;
Claim 14
Dependent Claim
9 words
said asphalt fraction is withdrawn from said unit, and
Claim 15
Dependent Claim
9 words
said asphalt fraction is withdrawn from said unit, and
Claim 16
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 17
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 18
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 19
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 20
Dependent Claim
115 words
contacting at least a portion of said vacuum gas oil fraction with a select high activity desulfurization catalyst and hydrogen gas in a first hydrodesulfurization zone under a hydrogen partial pressure in the range 300 to 800 psig, said catalyst consisting essentially of a sulfided composite containing cobalt, molybdenum, phosphorus, titanium and alumina, and having pore volume of at least 0.5 cc per gram of said composite, said pores having an average pore diameter in the range 80 to 120A with at least 50 percent of said pores having a diameter in the range 65 to 150A, and said composite having an atomic ratio of cobalt to molybdenum in the range 0.3 to 0.6; and
Claim 21
Dependent Claim
115 words
contacting at least a portion of said vacuum gas oil fraction with a select high activity desulfurization catalyst and hydrogen gas in a first hydrodesulfurization zone under a hydrogen partial pressure in the range 300 to 800 psig, said catalyst consisting essentially of a sulfided composite containing cobalt, molybdenum, phosphorus, titanium and alumina, and having pore volume of at least 0.5 cc per gram of said composite, said pores having an average pore diameter in the range 80 to 120A with at least 50 percent of said pores having a diameter in the range 65 to 150A, and said composite having an atomic ratio of cobalt to molybdenum in the range 0.3 to 0.6; and
Claim 22
Dependent Claim
9 words
said asphalt fraction is withdrawn from said unit, and
Claim 23
Dependent Claim
9 words
said asphalt fraction is withdrawn from said unit, and
Claim 24
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 25
Dependent Claim
16 words
a sulfur-reduced vacuum residuum is withdrawn from said second zone and passed to a vacuum fractionator;
Claim 26
Dependent Claim
24 words
withdrawing from said first hydrodesulfurization zone an effluent, the 350*F.+ portion thereof having a sulfur content below 0.2 weight percent, calculated as elemental sulfur.
Claim 27
Dependent Claim
24 words
withdrawing from said first hydrodesulfurization zone an effluent, the 350*F.+ portion thereof having a sulfur content below 0.2 weight percent, calculated as elemental sulfur.
Claim 28
Dependent Claim
29 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first zone, at least a portion of said asphalt-reduced fraction is admixed with said vacuum gas oil.
Claim 29
Dependent Claim
29 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first zone, at least a portion of said asphalt-reduced fraction is admixed with said vacuum gas oil.
Claim 30
Dependent Claim
21 words
a 350*f.-1050*F. boiling range hydrocarbon mixture having a sulfur content below about 0.15 weight percent is withdrawn from said fractionator; and
Claim 31
Dependent Claim
21 words
a 350*f.-1050*F. boiling range hydrocarbon mixture having a sulfur content below about 0.15 weight percent is withdrawn from said fractionator; and
Claim 32
Dependent Claim
12 words
a 350*F.-1050*F. boiling range hydrocarbon mixture is withdrawn from said fractionator; and
Claim 33
Dependent Claim
12 words
a 350*F.-1050*F. boiling range hydrocarbon mixture is withdrawn from said fractionator; and
Claim 34
Dependent Claim
29 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first zone, at least a portion of said asphalt-reduced fraction is admixed with said vacuum gas oil.
Claim 35
Dependent Claim
29 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first zone, at least a portion of said asphalt-reduced fraction is admixed with said vacuum gas oil.
Claim 36
Dependent Claim
21 words
a 350*C.-1050*F. boiling range hydrocarbon mixture having a sulfur content below about 0.15 weight percent is withdrawn from said fractionator; and
Claim 37
Dependent Claim
21 words
a 350*C.-1050*F. boiling range hydrocarbon mixture having a sulfur content below about 0.15 weight percent is withdrawn from said fractionator; and
Claim 38
Dependent Claim
12 words
a 350*F.-1050*F. boiling range hydrocarbon mixture is withdrawn from said fractionator; and
Claim 39
Dependent Claim
12 words
a 350*F.-1050*F. boiling range hydrocarbon mixture is withdrawn from said fractionator; and
Claim 40
Dependent Claim
14 words
a bottoms fraction is withdrawn from said coker fractionator and passed to a coker;
Claim 41
Dependent Claim
14 words
a bottoms fraction is withdrawn from said coker fractionator and passed to a coker;
Claim 42
Dependent Claim
21 words
A process as in claim 1 wherein said 350*F.+ portion has a sulfur content in the range of 0.005 to 0.1.
Claim 43
Dependent Claim
24 words
withdrawing from said first hydrodesulfurization zone an effluent, the 350*F.+ portion thereof having a sulfur content below 0.2 weight percent, calculated as Elemental sulfur.
Claim 44
Dependent Claim
24 words
withdrawing from said first hydrodesulfurization zone an effluent, the 350*F.+ portion thereof having a sulfur content below 0.2 weight percent, calculated as Elemental sulfur.
Claim 45
Dependent Claim
24 words
WITHDRAWING FROM SAID FIRST HYDRODESULFURIZATION ZONE AN EFFLUENT, THE 350*F.+ PORTION THEREOF HAVING A SULFUR CONTENT BELOW 0.2 WEIGHT PERCENT, CALCULATED AS ELEMENTAL SULFUR.
Claim 46
Dependent Claim
24 words
WITHDRAWING FROM SAID FIRST HYDRODESULFURIZATION ZONE AN EFFLUENT, THE 350*F.+ PORTION THEREOF HAVING A SULFUR CONTENT BELOW 0.2 WEIGHT PERCENT, CALCULATED AS ELEMENTAL SULFUR.
Claim 47
Dependent Claim
7 words
A process as in claim 1 wherein:
Claim 48
Dependent Claim
9 words
a metallurgical grade coke is withdrawn from said coker;
Claim 49
Dependent Claim
9 words
a metallurgical grade coke is withdrawn from said coker;
Claim 50
Dependent Claim
37 words
a fuel oil blend is produced by mixing at least a portion of said 350*F.-1050*F. hydrocarbon mixture with at least a portion of said 350*F.+ portion, said blend having a sulfur content below about 0.2 weight percent.
Claim 51
Dependent Claim
37 words
a fuel oil blend is produced by mixing at least a portion of said 350*F.-1050*F. hydrocarbon mixture with at least a portion of said 350*F.+ portion, said blend having a sulfur content below about 0.2 weight percent.
Claim 52
Dependent Claim
44 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first hydrodesulfurization zone, at least a portion of said withdrawn 350*F.-1050*F. hydrocarbon mixture is admixed with said vacuum gas oil fraction and the resulting mixture is fed to the first hydrodesulfurization zone.
Claim 53
Dependent Claim
44 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first hydrodesulfurization zone, at least a portion of said withdrawn 350*F.-1050*F. hydrocarbon mixture is admixed with said vacuum gas oil fraction and the resulting mixture is fed to the first hydrodesulfurization zone.
Claim 54
Dependent Claim
38 words
a fuel oil blend is produced by mixing at least a portion of said 350*F. -1050*F. hydrocarbon mixture with at least a portion of said 350*F.+ portion, said blend having a sulfur content below about 0.2 weight percent.
Claim 55
Dependent Claim
38 words
a fuel oil blend is produced by mixing at least a portion of said 350*F. -1050*F. hydrocarbon mixture with at least a portion of said 350*F.+ portion, said blend having a sulfur content below about 0.2 weight percent.
Claim 56
Dependent Claim
44 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first hydrodesulfurization zone, at least a portion of said withdrawn 350*F.-1050*F. hydrocarbon mixture is admixed with said vacuum gas oil fraction and the resulting mixture is fed to the first hydrodesulfurization zone.
Claim 57
Dependent Claim
44 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first hydrodesulfurization zone, at least a portion of said withdrawn 350*F.-1050*F. hydrocarbon mixture is admixed with said vacuum gas oil fraction and the resulting mixture is fed to the first hydrodesulfurization zone.
Claim 58
Dependent Claim
18 words
A process as in claim 4 wherein said blend has a sulfur content below about 0.1 weight percent.
Claim 59
Dependent Claim
10 words
an overhead fraction is withdrawn from said coker fractionator; and
Claim 60
Dependent Claim
10 words
an overhead fraction is withdrawn from said coker fractionator; and
Claim 61
Dependent Claim
34 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first zone, at least a portion of said overhead fraction withdrawn from said coker fractionator is admixed with said vacuum gas oil.
Claim 62
Dependent Claim
34 words
prior to the hydrodesulfurization of said vacuum gas oil fraction in said first zone, at least a portion of said overhead fraction withdrawn from said coker fractionator is admixed with said vacuum gas oil.
Claim 63
Dependent Claim
7 words
A process as in claim 1 wherein:
Claim 64
Dependent Claim
7 words
A process as in claim 1 wherein:
Claim 65
Dependent Claim
7 words
A process as in claim 1 wherein:
Claim 66
Dependent Claim
20 words
A process as in claim 1 wherein said phosphorus and molybdenum are incorporated into the catalyst in the phosphomolybdate form.
Claim 67
Dependent Claim
12 words
A process as in claim 1 wherein said catalyst also contains titanium.
Claim 68
Dependent Claim
19 words
A process in claim 1 wherein the pores of said catalyst have an average pore diameter of about 100A.
Claim 69
Dependent Claim
37 words
A process for producing a low-sulfur hydrocarbon mixture by desulfurizing a hydrocarbon feedstock, said feedstock being a reduced-crude obtained from a whole crude oil having a sulfur content of at least about 1 weight percent, which comprises:
Claim 70
Dependent Claim
37 words
A process for producing a low-sulfur hydrocarbon mixture by desulfurizing a hydrocarbon feedstock, said feedstock being a reduced-crude obtained from a whole crude oil having a sulfur content of at least about 1 weight percent, which comprises:
Claim 71
Dependent Claim
20 words
A process as in claim 12 wherein the pores of said catalyst have an average pore diameter of about 100A.
Claim 72
Dependent Claim
7 words
A process as in claim 12 wherein:
Claim 73
Dependent Claim
7 words
A process as in claim 12 wherein:
Claim 74
Dependent Claim
7 words
A process as in calim 12 wherein:
Claim 75
Dependent Claim
7 words
A process as in calim 12 wherein:
Claim 76
Dependent Claim
20 words
A process as in claim 12 wherein said phosphorus and molybdenum are incorporated into the catalyst in the phosphomolybdate form.
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |