US20040133052A1
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Catalyst for hydrogenating of unsaturated hydrocarbons
Assignee: Sued Chemie AG
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Filing: 2001-02-08
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Granted: —
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Expires: 2021-02-08
Abstract
Abstract A catalyst is described for hydrogenation of unsaturated hydrocarbons, containing catalytically active amounts of Pd and optionally Ag in a support. The catalyst is characterized by the fact that the support represents a shaped body with a trilobal cross section, the lobes being provided with continuous openings. The catalysts can be produced according to a method, in which the support is impregnated with a solution of salts of Pd and optionally Ag. These salts are reduced by means of a reducing agent, whereupon the support so impregnated is washed, dried and calcined and, if reduction is not complete, the still present oxides of Pd and Ag are reduced to the corresponding metals in a hydrogen-containing atmosphere.
Inventors
- 👤 Mauro Petrolli
- 👤 Ingrid Geyer
- 👤 Francesco Casagrande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:49
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/05; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J23/48; B01J23/50; B01J23/54; B01J23/66; C07C5/08; C07C5/09; B01J35/00; B01J35/50; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/50
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
42 words
17 . A catalyst for hydrogenation of unsaturated hydrocarbons comprising catalytically active amounts of palladium on a support, wherein the support is a shaped body with a trilobal cross-section, wherein lobes of the trilobal shaped body are provided with openings passing therethrough.
Claim 2
Dependent Claim
42 words
17 . A catalyst for hydrogenation of unsaturated hydrocarbons comprising catalytically active amounts of palladium on a support, wherein the support is a shaped body with a trilobal cross-section, wherein lobes of the trilobal shaped body are provided with openings passing therethrough.
Claim 3
Dependent Claim
13 words
18 . The catalyst of claim 17 further comprising catalytically amounts of silver.
Claim 4
Dependent Claim
29 words
19 . The catalyst, of claim 17 , wherein a ratio between a length and a diameter of the trilobal shaped bodies is from about 2:1 to about 4;1.
Claim 5
Dependent Claim
20 words
20 . The catalyst of claim 17 , containing a geometric surface fromn about 0.2 to 3 cm 2 .
Claim 6
Dependent Claim
20 words
21 . The catalyst of claim 17 , containing a geometric surface from about 0.7 to 1.2 cm 2 .
Claim 7
Dependent Claim
20 words
22 . The catalyst of claim 17 , containing a geometric surface from about 0.9 to 1.5 cm 2 .
Claim 8
Dependent Claim
33 words
23 . The catalyst of claim 17 , wherein a ratio between a geometric surface of the shaped body and a volume of the shaped body is from about 0.5:1 to about 20:1,
Claim 9
Dependent Claim
34 words
24 . The catalyst of claim 17 , wherein a ratio between a geometric surface area of the shaped body and a volume of the shaped body is from about 1.4:1 to about 4:1.
Claim 10
Dependent Claim
23 words
25 . The catalyst of claim 17 , wherein the palladium comprises from about 0.01 to about 1 weight percent of the catalyst.
Claim 11
Dependent Claim
52 words
26 . The catalyst of claim 18 wherein the palladium comprises from about 0.01 to 1 weight percent and the silver comprises from 0.1 to 0.5 weight percent of the catalyst and wherein a weight ratio between the palladium and the silver in the catalyst is from about 0.1:1 to about 5:1.
Claim 12
Dependent Claim
34 words
27 . The catalyst of claim 17 further comprising palladium crystallites after catalyst reduction wherein at least about 80 percent of the palladium crystallites have a crystallite size from about 2 to 15 nm.
Claim 13
Dependent Claim
13 words
28 . The catalyst of claim 17 wherein the support comprises aluminum oxide.
Claim 14
Dependent Claim
16 words
29 . The catalyst of claim 28 wherein the aluminum oxide comprises substantially theta aluminum oxide.
Claim 15
Dependent Claim
23 words
30 . The catalyst of claim 17 containing a BET surface area of the support fromn about 1 to 300 m 2 /g.
Claim 16
Dependent Claim
23 words
31 . The catalyst of claim 17 containing a BET surface area of the support from about 10 to 300 m 2 /g.
Claim 17
Dependent Claim
23 words
32 . The catalyst of claim 17 containing a BET surface area of the support from about 30 to 80 m 2 /g.
Claim 18
Dependent Claim
54 words
33 . The catalyst of claim 30 wherein up to about 40 percent of the BET surface area is contained in pores with a diameter from about 1750 to 80nm and at least about 60 percent of the BET surface area is contained in pores with a diameter from about 80 to 14 nm.
Claim 19
Dependent Claim
49 words
34 . The catalyst of claim 17 containing a diameter of the trilobal shaped body from about 3 to 10 nm, a length from about 3 to 15 nm and a diameter of an opening in a lobe of the trilobal shaped body from about 0.5 to 5 nm.
Claim 20
Dependent Claim
42 words
35 . The catalyst of claim 17 further comprises from about 0.01 to about 0.1 weight percent of a material selected from an alkali metal, an alkaline earth metal or mixtures thereof, with the weight percent calculated in the form of oxides,
Claim 21
Dependent Claim
78 words
36 . A catalyst for hydrogenation of unsaturated hydrocarbons comprising catalytically active amounts of palladium on a support, wherein the support is a shaped body with a trilobal cross-section, wherein lobes of the trilobal shaped body are provided with openings passing therethrough, and wherein the catalyst further comprises palladium crystallites after catalyst reduction, wherein a ratio between a BET-S surface area of the catalyst and a size of the palladium crystallites is from about 0.1:1 to about 10:1.
Claim 22
Dependent Claim
78 words
36 . A catalyst for hydrogenation of unsaturated hydrocarbons comprising catalytically active amounts of palladium on a support, wherein the support is a shaped body with a trilobal cross-section, wherein lobes of the trilobal shaped body are provided with openings passing therethrough, and wherein the catalyst further comprises palladium crystallites after catalyst reduction, wherein a ratio between a BET-S surface area of the catalyst and a size of the palladium crystallites is from about 0.1:1 to about 10:1.
Claim 23
Dependent Claim
73 words
37 . A method for production of a catalyst comprising preparing a shaped body with a trilobal cross-section in which lobes of the shaped body are provided with openings passing therethrough, impregnating the shaped body with a palladium salt solution, reducing that palladium salt solution to a palladium oxide by use of a reducing agent, washing, drying, and calcining the impregnated, shaped body and reducing the palladium oxide to a corresponding palladium metal,
Claim 24
Dependent Claim
73 words
37 . A method for production of a catalyst comprising preparing a shaped body with a trilobal cross-section in which lobes of the shaped body are provided with openings passing therethrough, impregnating the shaped body with a palladium salt solution, reducing that palladium salt solution to a palladium oxide by use of a reducing agent, washing, drying, and calcining the impregnated, shaped body and reducing the palladium oxide to a corresponding palladium metal,
Claim 25
Dependent Claim
26 words
38 . The process of claim 37 further comprising further impregnating the shaped body with a silver salt and reducing that silver salt to silver metal.
Claim 26
Dependent Claim
30 words
39 . The method of claim 37 wherein the reducing of the palladium salt is accoraplished in an alkaline medium at a temperature from about 20 to about 100° C.
Claim 27
Dependent Claim
21 words
40 . The method of claim 37 wherein the reducing of the palladium salt is accomplished in an aqueous alkaline solution.
Claim 28
Dependent Claim
23 words
41 . A process for the selective hydrogenation of diolefins to mono-olefins comprising passing the diolefins over the catalyst of claim 1 .
Claim 29
Dependent Claim
23 words
42 . A process for the selective hydrogenation of acetylenes to olefins comprising passing the acetylenes over the catalyst of claim 1 .
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