Patent US4186078A successfully refreshed from Google Patents.
US4186078A
Expired / Lapsed
US
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Catalyst and process for hydrofining petroleum wax
Assignee: Tonen General Sekiyu KK
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Filing: 1978-04-20
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Granted: 1980-01-29
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Expires: 1998-04-20
Abstract
Abstract A catalyst and process are described for hydrofining petroleum wax comprising contacting the wax with hydrogen in the presence of a catalyst comprising at least one metal hydrogenating component on a porous alumina/silica carrier containing from about 0.2 to 5 wt.% of an alkali metal component, the catalyst having a specific surface area of about 200 to 300 m2/g and being further characterized in that (a) the volume of pores having a diameter in the range of 60 to 150 A is greater than 80% of the volume of pores having a diameter in the range of 0 to 150 A and (b) the volume of pores having a diameter in the range of 0 to 600 A is in the range of about 0.45 to 0.60 ml/g.
Inventors
- 👤 Takuji Itoh
- 👤 Satoshi Sakurada
- 👤 Shohei Okano
- 👤 Takashi Obayashi
- 👤 Takeo Toyoizumi
- 👤 Osami Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/42; C10G73/44; B; B01; B01J; B01J35/00; B01J35/60; B01J35/61; B01J35/615; B01J35/63; B01J35/635; B01J35/64; B01J35/647
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A process for hydrofining petroleum wax which comprises contacting the wax with hydrogen at hydrofining conditions in the presence of a catalyst comprising at least one metal hydrogenating component on a porous alumina/silica carrier containing from about 5 to 25 wt.% of silica and 0.2 to 5 wt.% of an alkali metal component and containing pores having diameters ranging from 0-600 A, said catalyst being further characterized in that: (a) the volume of pores having a diameter in the range of 60 to 150 A is greater than 80% of the volume of pores having a diameter in the range of 0 to 150 A; and (b) the volume of pores having a diameter in the range of 0 to 600 A is in the range of from about 0.45 to 0.60 ml/g.
Claim 2
Dependent Claim
133 words
A process for hydrofining petroleum wax which comprises contacting the wax with hydrogen at hydrofining conditions in the presence of a catalyst comprising at least one metal hydrogenating component on a porous alumina/silica carrier containing from about 5 to 25 wt.% of silica and 0.2 to 5 wt.% of an alkali metal component and containing pores having diameters ranging from 0-600 A, said catalyst being further characterized in that: (a) the volume of pores having a diameter in the range of 60 to 150 A is greater than 80% of the volume of pores having a diameter in the range of 0 to 150 A; and (b) the volume of pores having a diameter in the range of 0 to 600 A is in the range of from about 0.45 to 0.60 ml/g.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said catalyst is sulfided prior to use.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein said metal hydrogenating component is selected from the group consisting of metals of Group VI and Group VIII and mixture thereof.
Claim 5
Dependent Claim
22 words
The process of claim 3 wherein said alkali metal component is selected from the group consisting of lithium, potassium and sodium oxides.
Claim 6
Dependent Claim
27 words
The process of claim 4 wherein said alkali metal component is present in the catalyst in an amount ranging from 0.3 to 1 wt.% of the carrier.
Claim 7
Dependent Claim
59 words
The process of claim 5 wherein said hydrorefining conditions include a temperature within the range of from about 180° to 330° C., a pressure within the range of from about 30 to 200 kg/cm 2 , a hydrogen-containing gas rate from about 50 to 1500 l/l and a liquid hourly space velocity of from about 0.2 to 2.0 V/H/V.
Claim 8
Dependent Claim
16 words
The process of claim 6 wherein said hydrogen-containing gas contains from 60 to 100% of hydrogen.
Claim 9
Dependent Claim
21 words
The process of claim 7 wherein the catalyst has a specific surface area ranging from 200 to 300 m 2 /g.
Claim 10
Dependent Claim
20 words
The process of claim 8 wherein the catalyst has a total pore volume ranging from about 0.5 to 1.0 ml/g.
Claim 11
Dependent Claim
31 words
The process of claim 9 wherein said metal hydrogenating component is a mixture of two or more metals one of which is molybdenum and/or tungsten and the other cobalt and/or nickel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |