US5583274A
Expired / Lapsed
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Alkyne hydrogenation process
Assignee: Phillips Petroleum Co
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Filing: 1995-01-20
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Granted: 1996-12-10
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Expires: 2015-01-20
Abstract
Abstract C 2 -C 6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal fluoride (preferably potassium fluoride).
Inventors
- 👤 Tin-Tack P. Cheung
- 👤 Marvin M. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:41
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C5/09; C07C7/00; C07C7/148; C07C7/163; C07C7/167; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/50; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
68 words
A process for selectively hydrogenating at least one alkyne containing 2-6 carbon atoms per molecule, which is present in a feed also comprising at least one sulfur compound, with hydrogen gas to at least one corresponding alkene containing 2-6 carbon atoms per molecule comprising contacting said feed and said hydrogen gas with a catalyst which comprises palladium, at least one alkali metal fluoride and an inorganic support material.
Claim 2
Dependent Claim
68 words
A process for selectively hydrogenating at least one alkyne containing 2-6 carbon atoms per molecule, which is present in a feed also comprising at least one sulfur compound, with hydrogen gas to at least one corresponding alkene containing 2-6 carbon atoms per molecule comprising contacting said feed and said hydrogen gas with a catalyst which comprises palladium, at least one alkali metal fluoride and an inorganic support material.
Claim 3
Dependent Claim
25 words
A process in accordance with claim 1, wherein said at least one alkyne is selected from the group consisting of acetylene, propyne, butyne-1 and butyne-2.
Claim 4
Dependent Claim
23 words
A process in accordance with claim 2, wherein said at least one alkyne is acetylene and said at least one alkene is ethylene.
Claim 5
Dependent Claim
67 words
A process in accordance with claim 2, wherein said at least one sulfur compound is selected from the group consisting of hydrogen sulfide, carbonyl sulfide, mercaptans having the general formula of RSH, organic sulfides having the general formula of R-S-R, organic disulfides having the general formula of R-S-S-R and mixtures thereof, wherein each R can be an alkyl or cycloalkyl or aryl group containing 1-10 carbon atoms.
Claim 6
Dependent Claim
28 words
A process in accordance with claim 4, wherein said at least sulfur compound is present in said feed at a level of about 1-1,000 ppm by weight sulfur.
Claim 7
Dependent Claim
32 words
A process in accordance with claim 2, wherein said at least one alkali metal fluoride contained in said catalyst is potassium fluoride and said inorganic support material in said catalyst is alumina.
Claim 8
Dependent Claim
20 words
A process in accordance with claim 6, wherein said catalyst contains about 0.01-1 weight-% palladium and about 0.05-1.5 weight-% fluorine.
Claim 9
Dependent Claim
24 words
A process in accordance with claim 7, wherein the weight ratio of fluorine to palladium in said catalyst is about 3:1 to about 30:1.
Claim 10
Dependent Claim
83 words
A process in accordance with claim 6, wherein said at least one alkyne contained in said feed is acetylene, and said at least one sulfur compound contained in said feed is selected from the group consisting of hydrogen sulfide, carbonyl sulfide, mercaptans having the general formula of RSH, organic sulfides having the general formula of R-S-R, organic disulfides having the general formula of R-S-S-R and mixtures thereof, wherein each R can be an alkyl or cycloalkyl or aryl group containing 1-10 carbon atoms.
Claim 11
Dependent Claim
13 words
A process in accordance with claim 2, wherein said catalyst additionally comprises silver.
Claim 12
Dependent Claim
33 words
A process in accordance with claim 10, wherein said at least one alkali metal fluoride contained in said catalyst is potassium fluoride and said inorganic support material contained in said catalyst is alumina.
Claim 13
Dependent Claim
24 words
A process in accordance with claim 11, wherein said catalyst comprises about 0.01-1 weight-% palladium, about 0.01-10 weight-% silver and about 0.05-1.5 weight-% fluorine.
Claim 14
Dependent Claim
41 words
A process in accordance with claim 12, wherein the weight ratio of fluorine to palladium in said catalyst is about 3:1 to about 30:1 and the weight ratio of silver to palladium in said catalyst is about 2:1 to about 10:1.
Claim 15
Dependent Claim
83 words
A process in accordance with claim 11, wherein said at least one alkyne contained in said feed is acetylene, and said at least one sulfur compound contained in said feed is selected from the group consisting of hydrogen sulfide, carbonyl sulfide, mercaptans having the general formula of RSH, organic sulfides having the general formula of R-S-R, organic disulfides having the general formula of R-S-S-R and mixtures thereof, wherein each R can be an alkyl or cycloalkyl or aryl group containing 1-10 carbon atoms.
Claim 16
Dependent Claim
27 words
A process in accordance with claim 2, wherein said feed contains said at least one alkyne as an impurity in a C 2 -C 6 alkene stream.
Claim 17
Dependent Claim
24 words
A process in accordance with claim 15, wherein said feed contains said at least alkyne at a level of about 1-50,000 ppm by weight.
Claim 18
Dependent Claim
21 words
A process in accordance with claim 16, wherein said alkyne is acetylene and said C 2 -C 6 alkene is ethylene.
Claim 19
Dependent Claim
44 words
A process in accordance with claim 2, wherein said contacting is carried out at a reaction temperature of about 40°-200° C. and a molar ratio of hydrogen gas to said at least one alkyne is in the range of about 0.5:1 to about 100:1.
Claim 20
Dependent Claim
15 words
A process in accordance with claim 18, wherein said at least one alkyne is acetylene.
References Cited (Backward Citations)
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