US5444032A
Expired / Lapsed
US
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Process for preparing an effective catalyst for n-parafins hydroisomerization
Assignee: Eni Tecnologie SpA
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Filing: 1993-09-21
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Granted: 1995-08-22
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Expires: 2013-09-21
Abstract
Abstract An improved process for preparing a difunctional catalyst active, in the hydroisomerization of long-chain normal paraffins is disclosed, which is constituted by an amorphous silica-alumina gel and one or more metals belonging to Group VIIIIA.
Inventors
- 👤 Carlo Perego
- 👤 Giuseppe Bellussi
- 👤 Vincenzo Calemma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:47
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/62; B; B01; B01J; B01J21/00; B01J21/12; B01J23/00; B01J23/38; B01J23/40; B01J35/00; B01J35/60; B01J35/61; B01J35/615; B01J35/617; B01J35/618; B01J35/63; B01J35/633; B01J37/00; B01J37/02; B01J37/03; B01J37/031; B01J37/033; B01J37/036
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A process for preparing difunctional catalysts, comprising the steps of: heating a solution to form a gel; drying and calcining said gel under an inert atmosphere and then under an oxidizing atmosphere; wherein said solution comprises, (a) a tetraalkylammonium hydroxide (TAA-OH), wherein said alkyl is selected from the group consisting of ethyl, n-propyl and n-butyl; (b) a soluble aluminum compound capable of undergoing hydrolysis to yield Al 2 O 3; (c) a noble metal (M) complex or salt; (d) a soluble silicon compound capable of undergoing hydrolysis yielding SiO 2 ; and (e) H 2 O; wherein said solution has a molar ratio of SiO 2 :Al 2 O 3 in the range of from 30:1 to 500:1, a molar ratio of TAA-OH:SiO 2 in the range of from 0.05:1 to 0.2:1, a molar ratio of H 2 O:SiO 2 in the range of from 5:1 to 40:1, and a molar ratio of M:SiO 2 in the range of from 0.0002:1 to 0.05:1.
Claim 2
Dependent Claim
163 words
A process for preparing difunctional catalysts, comprising the steps of: heating a solution to form a gel; drying and calcining said gel under an inert atmosphere and then under an oxidizing atmosphere; wherein said solution comprises, (a) a tetraalkylammonium hydroxide (TAA-OH), wherein said alkyl is selected from the group consisting of ethyl, n-propyl and n-butyl; (b) a soluble aluminum compound capable of undergoing hydrolysis to yield Al 2 O 3; (c) a noble metal (M) complex or salt; (d) a soluble silicon compound capable of undergoing hydrolysis yielding SiO 2 ; and (e) H 2 O; wherein said solution has a molar ratio of SiO 2 :Al 2 O 3 in the range of from 30:1 to 500:1, a molar ratio of TAA-OH:SiO 2 in the range of from 0.05:1 to 0.2:1, a molar ratio of H 2 O:SiO 2 in the range of from 5:1 to 40:1, and a molar ratio of M:SiO 2 in the range of from 0.0002:1 to 0.05:1.
Claim 3
Dependent Claim
24 words
A process for preparing difunctional catalyst according to claim 1, wherein the noble metal is selected from the group consisting of platinum and palladium.
Claim 4
Dependent Claim
63 words
A process for preparing difunctional catalyst according to claim 1, wherein said solution has a molar ratio of SiO 2 :Al 2 O 3 in the range of from 50:1 to 300:1, a molar ratio of H 2 O:SiO 2 in the range of from 10:1 to 25:1, and a molar ratio of M:SiO 2 in the range of from 0.003:1 to 0.01:1.
Claim 5
Dependent Claim
74 words
A difunctional catalysts comprising: (a) an X-ray amorphous silica-alumina gel with a molar ratio of SiO 2 :Al 2 O 3 in the range of from 30:1 to 500:1, with a porosity in the range of 0.3 to 0.6 ml/g, and with a prevailing pore diameter in the range of from 10 to 30 Å; and (b) one or more metals from Group VIIIA, in an amount of from 0.05 to 5% by wt.
Claim 6
Dependent Claim
74 words
A difunctional catalysts comprising: (a) an X-ray amorphous silica-alumina gel with a molar ratio of SiO 2 :Al 2 O 3 in the range of from 30:1 to 500:1, with a porosity in the range of 0.3 to 0.6 ml/g, and with a prevailing pore diameter in the range of from 10 to 30 Å; and (b) one or more metals from Group VIIIA, in an amount of from 0.05 to 5% by wt.
Claim 7
Dependent Claim
12 words
A difunctional catalyst according to claim 4, further comprising a binding agent.
Claim 8
Dependent Claim
54 words
The process of claim 1, wherein said noble metal complex or salt (c) is selected from the group consisting of H 2 PtCl 6 , Pt(NH 3 ) 4 (OH) 2 , Pt(NH 3 ) 4 Cl 2 , Pd(NH 3 ) 4 (NO 3 ) 2 , and Pd(CH 3 COO) 2 .
Claim 9
Dependent Claim
32 words
The process of claim 1 wherein said noble metal complex or salt (c) is selected from the group consisting of Pt(NH 3 ) 4 (OH) 2 and Pd(CH 3 COO) 2 .
Claim 10
Dependent Claim
23 words
The difunctional catalyst of claim 4, wherein said noble metal from Group VIIIA is selected from the group consisting of platinum and palladium.
References Cited (Backward Citations)
GB1177170A
Cited
US3978001A
Cited
FR2351699A1
Cited
US4139494A
Cited
EP0162554A1
Cited
EP0340868A1
Cited
US5049536A
Cited
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