Patent EP0722776A1 successfully refreshed from Google Patents.
EP0722776A1
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Alkyne hydrogenation process
Assignee: Chevron Phillips Chemical Co LP
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Filing: 1996-01-19
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Granted: —
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Expires: 2016-01-19
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
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:06
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: 12
Claim 1
Independent Claim
30 words
Catalyst, comprising palladium, at least one alkali metal fluoride, preferably potassium fluoride, and optionally silver, on an inorganic support material, such as alumina, titania, zirconia and mixtures thereof, preferably alumina.
Claim 2
Dependent Claim
33 words
Catalyst according to claim 1, consisting of palladium and, at least one alkali metal fluoride, preferably potassium fluoride, on an inorganic support material, such as alumina, titania, zirconia and mixtures thereof, preferably alumina.
Claim 3
Dependent Claim
44 words
Catalyst according to claim 1 or 2, comprising about 0.01 - 1 weight-%, preferably 0.01 - 0.2 weight-% palladium, about 0.05 - 1.5 weight-%, preferably 0.1 - 0.4 weight-% fluorine and, if present, about 0.01 - 10 weight-%, preferably 0.02 - 2 weight-% silver.
Claim 4
Dependent Claim
38 words
Catalyst according to one of the preceding claims, wherein the weight ratio of fluorine to palladium is about 3:1 to about 30:1, and, if present, the weight ratio of silver to palladium is about 2:1 to about 10:1.
Claim 5
Dependent Claim
34 words
Catalyst according to one of the preceding claims having a particle size of about 1 - 10 mm, preferably 2 - 6 mm, and surface area of about 1 - 100 m 2 /g.
Claim 6
Dependent Claim
66 words
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 as defined in one of claims 1 to 5.
Claim 7
Dependent Claim
35 words
Process according to claim 6, wherein said at least one alkyne is selected from the group consisting of acetylene, propyne, butyne-1 and butyne-2, preferably being acetylene, the said at least one alkyne being preferably ethylene.
Claim 8
Dependent Claim
33 words
Process according to claim 6 or 7, wherein said at least one sulfur compound is selected from the group consisting of hydrogen sulfide, carbonyl sulfide, mercaptans, organic sulfides, organic disulfides and mixtures thereof.
Claim 9
Dependent Claim
39 words
Process according to one of claims 6 to 8, wherein said at least one sulfur compound is present in said feed at a level of less than about 1 weight-%, preferably about 1 - 1000 ppm by weight sulfur.
Claim 10
Dependent Claim
29 words
Process according to one of claims 6 to 9, wherein said feed contains said at least one alkyne as an impurity in a C 2 -C 6 alkene stream.
Claim 11
Dependent Claim
37 words
Process according to claim 10, wherein said feed contains said at least one alkyne, preferably acetylene, at a level of about 1 - 50 000 ppm by weight, the C 2 -C 6 alkene preferably being ethylene.
Claim 12
Dependent Claim
60 words
Process according to one of claims 6 to 11, wherein said contacting is carried out at a reaction temperature of about 40 - 200 °C, preferably of about 60 - 150 °C and a molar ratio of hydrogen gas to said at least one alkyne in the range of about 0.5:1 to about 100:1, preferably about 1:1 to about 50:1.
References Cited (Backward Citations)
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