Patent US4371507A successfully refreshed from Google Patents.
US4371507A
Expired / Lapsed
US
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Catalytic hydrogenation of olefins, hydrodesulfurization of organic sulfur compounds and/or selective removal of hydrogen sulfide from fluid streams
Assignee: Phillips Petroleum Co
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Filing: 1981-12-02
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Granted: 1983-02-01
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Expires: 2001-12-02
Abstract
Abstract Hydrogen sulfide is removed from a fluid stream by contacting the fluid stream which contains hydrogen sulfide with an absorbing composition comprising zinc, titanium and at least one promoter selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel, molybdenum, rhenium, and compounds thereof. If organic sulfur compounds are present in the fluid stream, the absorbing composition acts as a hydrodesulfurization catalyst to convert the sulfur in the organic sulfur compounds to hydrogen sulfide which is subsequently removed from the fluid stream by the absorbing composition. If olefin contaminants are present in the fluid stream, the absorbing composition acts as hydrogenation catalyst to hydrogenate the olefin contaminants to paraffins.
Inventors
- 👤 Floyd E. Farha, Jr.
- 👤 Lloyd E. Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:16
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8873; B01J23/16; B01J23/80; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/10
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
84 words
A process for removing hydrogen sulfide from a fluid stream comprising the step of contacting said fluid stream under suitable absorbing conditions with an incompletely sulfided absorbing composition comprising zinc titanate and at least one promoter selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel, molybdenum, rhenium, and compounds thereof, wherein the concentration by weight of said at least one promoter in said absorbing composition is less than the total concentration by weight of said zinc titanate in said absorbing composition.
Claim 2
Dependent Claim
84 words
A process for removing hydrogen sulfide from a fluid stream comprising the step of contacting said fluid stream under suitable absorbing conditions with an incompletely sulfided absorbing composition comprising zinc titanate and at least one promoter selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel, molybdenum, rhenium, and compounds thereof, wherein the concentration by weight of said at least one promoter in said absorbing composition is less than the total concentration by weight of said zinc titanate in said absorbing composition.
Claim 3
Dependent Claim
28 words
A process in accordance with claim 1 wherein said fluid stream contains an olefin contaminant which is hydrogenated when said fluid stream is contacted with said catalyst/absorbing composition.
Claim 4
Dependent Claim
51 words
A process in accordance with claim 2 wherein said fluid stream is an aerosol propellant selected from the group consisting of isobutane, n-butane, propane and mixtures of any two or more thereof and said olefin contaminant is selected from the group consisting of ethylene, propylene, n-butenes, isobutene, n-pentenes and branched pentenes.
Claim 5
Dependent Claim
43 words
A process in accordance with claim 1 wherein said zinc titanate is prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of molecular oxygen at a temperature in the range of about 650° C. to about 1050° C.
Claim 6
Dependent Claim
29 words
A process in accordance with claim 4 wherein the atomic ratio of zinc to titanium in said absorbing composition is in the range of about 1:1 to about 3:1.
Claim 7
Dependent Claim
29 words
A process in accordance with claim 4 wherein the atomic ratio of zinc to titanium in said absorbing composition is in the range of about 1.8:1 to about 2.2:1.
Claim 8
Dependent Claim
47 words
A process in accordance with claim 4 wherein said absorbing composition has been calcined in the presence of molecular oxygen at a temperature in the range of about 500° C. to about 650° C. after said at least one promoter has been added to said zinc titanate.
Claim 9
Dependent Claim
83 words
A process in accordance with claim 7 wherein the concentration of vanadium, chromium, manganese, iron, cobalt, nickel, or molybdenum as individual promoters, if present, expressed as an element, is in the range of about 0.4 to about 16 weight percent based on the weight of said absorbing composition and the concentration of rhenium as an individual promoter, if present, expressed as an element, is in the range of about 0.05 to about 2.5 weight percent based on the weight of said absorbing composition.
Claim 10
Dependent Claim
50 words
A process in accordance with claim 8 wherein the total concentration of any combination of the group from which said at least one promoter is selected, expressed as an element, is in the range of about 1 to about 28 weight percent based on the weight of said absorbing composition.
Claim 11
Dependent Claim
20 words
A process in accordance with claim 1 wherein said at least one promoter is a combination of cobalt and molybdenum.
Claim 12
Dependent Claim
26 words
A process in accordance with claim 10 wherein the cobalt:molybdenum atomic ratio in said absorbing composition is in the range of about 0.3:1 to about 0.8:1.
Claim 13
Dependent Claim
34 words
A process in accordance with claim 1 wherein said absorbing composition additionally comprises at least one oxidation promoter selected from the group consisting of ruthenium, rhodium, palladium, silver, tungsten, iridium, platinum, and compounds thereof.
Claim 14
Dependent Claim
83 words
A process in accordance with claim 12 wherein the concentration of ruthenium, rhodium, palladium, silver, iridium or platinum as individual oxidation promoters, expressed as an element, if present, is in the range of about 0.05 to about 2.5 weight percent based on the weight of said absorbing composition and the concentration of tungsten as an individual promoter, expressed as an element, if present, is in the range of about 0.4 to about 16 weight percent based on the weight of said absorbing composition.
Claim 15
Dependent Claim
51 words
A process in accordance with claim 13 wherein the total concentration of any combination of said at least one promoter and said at least one oxidation promoter, expressed as an element, is in the range of about 1 to about 28 weight percent based on the weight of said absorbing composition.
Claim 16
Dependent Claim
78 words
A process in accordance with claim 1 wherein said suitable absorbing conditions comprise a temperature in the range of about 149° C. to about 538° C., a total system pressure in the range of about atmospheric to about 2000 psig and a residence time for said fluid stream in the presence of said absorbing composition in the range of about 0.1 to about 50 liquid volumes of said fluid stream per volume of said absorbing composition per hour.
Claim 17
Dependent Claim
79 words
A process in accordance with claim 1 wherein said suitable absorbing conditions comprise a temperature in the range of about 204° C. to about 399° C., a total system pressure in the range of about 15 psig to about 200 psig and a residence time for said fluid stream in the presence of said absorbing composition in the range of about 1 to about 5 liquid volumes of said fluid stream per volume of said absorbing composition per hour.
Claim 18
Dependent Claim
90 words
A process in accordance with claim 2 wherein said suitable absorbing conditions comprise a temperature in the range of about 149° C. to about 538° C., a total system pressure in the range of about 100 psig to about 1000 psig, a hydrogen concentration sufficient to hydrogenate all of said olefin contaminant and a residence time for said fluid stream in the presence of said absorbing composition in the range of about 0.1 to about 50 liquid volumes of said fluid stream per volume of said absorbing composition per hour.
Claim 19
Dependent Claim
105 words
A process in accordance with claim 2 wherein said suitable absorbing conditions comprise a temperature in the range of about 204° C. to about 399° C., a total system pressure in the range of about 100 psig to about 500 psig, a mole percent hydrogen concentration in the range of about 2 to about 3 times the mole percent of said olefin contaminants in said fluid stream and a residence time for said fluid stream in the presence of said absorbing composition in the range of about 1 to about 20 liquid volumes of said fluid stream per volume of said absorbing composition per hour.
Claim 20
Dependent Claim
16 words
A process in accordance with claim 1 wherein said absorbing composition is sulfided during said process.
Claim 21
Dependent Claim
52 words
A process in accordance with claim 19 additionally comprising the steps of: discontinuing the flow of said fluid stream over said absorbing composition; and contacting said absorbing composition, after the flow of said fluid stream is discontinued, with a molecular oxygen-containing fluid under suitable regeneration conditions to thereby regenerate said absorbing composition.
Claim 22
Dependent Claim
62 words
A process in accordance with claim 20 wherein said suitable regeneration conditions comprise a feed rate of said molecular oxygen-containing fluid suitable to supply sufficient oxygen to remove substantially all of the sulfur from said absorbing composition, a temperature in the range of about 370° to about 815° C., and a pressure in the range of about atmospheric to about 1000 psig.
Claim 23
Dependent Claim
18 words
A process in accordance with claim 21 wherein sulfur is removed as an oxide during said regeneration period.
Claim 24
Dependent Claim
40 words
A process in accordance with claim 20 additionally comprising the step of purging said absorbing composition with an inert fluid after the step of terminating the flow of said fluid stream and before the step of regenerating said absorbing composition.
Claim 25
Dependent Claim
87 words
A process in accordance with claim 20 additionally comprising the steps of: terminating the flow of said oxygen-containing fluid over said absorbing composition after said absorbing composition is substantially regenerated; purging said absorbing composition with an inert fluid after the flow of said oxygen-containing fluid is terminated; terminating the flow of said inert fluid over said absorbing composition after said oxygen-containing fluid is substantially purged from said absorbing composition; and recontacting said absorbing composition with said fluid stream after the flow of said inert fluid is terminated.
Claim 26
Dependent Claim
44 words
A process for removing hydrogen sulfide from a fluid stream which does not contain hydrocarbons which are subject to dehydrogenation, reforming or hydrocracking comprising the step of contacting said fluid stream under suitable absorbing conditions with an incompletely sulfided absorbing composition comprising zinc titanate.
Claim 27
Dependent Claim
44 words
A process for removing hydrogen sulfide from a fluid stream which does not contain hydrocarbons which are subject to dehydrogenation, reforming or hydrocracking comprising the step of contacting said fluid stream under suitable absorbing conditions with an incompletely sulfided absorbing composition comprising zinc titanate.
Claim 28
Dependent Claim
43 words
A process in accordance with claim 25 wherein said zinc titanate is prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of molecular oxygen at a temperature in the range of about 650° C. to about 1050° C.
Claim 29
Dependent Claim
29 words
A process in accordance with claim 26 wherein the atomic ratio of zinc to titanium in said absorbing composition is in the range of about 1:1 to about 3:1.
Claim 30
Dependent Claim
29 words
A process in accordance with claim 26 wherein the atomic ratio of zinc to titanium in said absorbing composition is in the range of about 1.8:1 to about 2.2:1.
Claim 31
Dependent Claim
78 words
A process in accordance with claim 25 wherein said suitable absorbing conditions comprise a temperature in the range of about 149° C. to about 538° C., a total system pressure in the range of about atmospheric to about 2000 psig and a residence time for said fluid stream in the presence of said absorbing composition in the range of about 0.1 to about 50 liquid volumes of said fluid stream per volume of said absorbing composition per hour.
Claim 32
Dependent Claim
79 words
A process in accordance with claim 25 wherein said suitable absorbing conditions comprise a temperature in the range of about 204° C. to about 399° C., a total system pressure in the range of about 15 psig to about 200 psig and a residence time for said fluid stream in the presence of said absorbing composition in the range of about 1 to about 5 liquid volumes of said fluid stream per volume of said absorbing composition per hour.
Claim 33
Dependent Claim
16 words
A process in accordance with claim 25 wherein said absorbing composition is sulfided during said process.
Claim 34
Dependent Claim
52 words
A process in accordance with claim 31 additionally comprising the steps of: discontinuing the flow of said fluid stream over said absorbing composition; and contacting said absorbing composition, after the flow of said fluid stream is discontinued, with a molecular oxygen-containing fluid under suitable regeneration conditions to thereby regenerate said absorbing composition.
Claim 35
Dependent Claim
63 words
A process in accordance with claim 32 wherein said suitable regeneration conditions comprise a feed rate of said molecular oxygen-containing fluid suitable to supply sufficient oxygen to remove substantially all of the sulfur from said absorbing composition, a temperature in the range of about 370° C. to about 815° C., and a pressure in the range of about atmospheric to about 1000 psig.
Claim 36
Dependent Claim
18 words
A process in accordance with claim 32 wherein sulfur is removed as an oxide during said regeneration period.
Claim 37
Dependent Claim
40 words
A process in accordance with claim 32 additionally comprising the step of purging said absorbing composition with an inert fluid after the step of terminating the flow of said fluid stream and before the step of regenerating said absorbing composition.
Claim 38
Dependent Claim
87 words
A process in accordance with claim 32 additionally comprising the steps of: terminating the flow of said oxygen-containing fluid over said absorbing composition after said absorbing composition is substantially regenerated; purging said absorbing composition with an inert fluid after the flow of said oxygen-containing fluid is terminated; terminating the flow of said inert fluid over said absorbing composition after said oxygen-containing fluid is substantially purged from said absorbing composition; and recontacting said absorbing composition with said fluid stream after the flow of said inert fluid is terminated.
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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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |