US4812436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-oxide-silica adsorbent for bleaching and refining oil
Assignee: PQ Silicas UK Ltd
•
Filing: 1987-11-24
•
Granted: 1989-03-14
•
Expires: 2007-11-24
Abstract
Abstract The invention provides a synthetic, calcined metal-oxide-silica adsorbent of which at least 40% of its surface area is contained in pores with radius of at least 2 nm. The invention further provides a process for refining oil, wherein the oil is treated with the adsorbent as a bleaching solid. The adsorbent can be regenerated by calcination without substantial loss of activity.
Inventors
- 👤 Leendert H. Staal
- 👤 Jan C. Vis
- 👤 Jan W. Groeneweg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:42
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
55 words
An adsorbent suitable for bleaching-refining fatty oil which essentially consists of a synthetic calcined metal-oxide-silica, having a surface area, at least 40% whereof is contained in pores with a radius of 2-4 nm, and having a specific pore volume in pores with a radius in the range of 100-2000 nm of at least 0.5 ml/g.
Claim 2
Dependent Claim
55 words
An adsorbent suitable for bleaching-refining fatty oil which essentially consists of a synthetic calcined metal-oxide-silica, having a surface area, at least 40% whereof is contained in pores with a radius of 2-4 nm, and having a specific pore volume in pores with a radius in the range of 100-2000 nm of at least 0.5 ml/g.
Claim 3
Dependent Claim
31 words
An adsorbent according to claim 1, wherein at least 50 mole % of the metal contained in the metal-oxide-silica is a metal that can have an oxidation state higher than 2.
Claim 4
Dependent Claim
29 words
An adsorbent according to claim 2, wherein the balance of the metal contained in the metal-oxide-silica consists essentially of a metal selected from the group of alkaline earth metals.
Claim 5
Dependent Claim
33 words
An adsorbent according to claim 2, wherein the metal that can have an oxidation state higher than 2 is selected from the group consisting of aluminium, iron, zirconium, cobalt, manganese and mixtures thereof.
Claim 6
Dependent Claim
20 words
An adsorbent according to claim 4, wherein the metal that can have an oxidation state higher than 2 is aluminium.
Claim 7
Dependent Claim
25 words
An adsorbent according to claim 1, wherein at least 60% of the surface area is contained in pores with radius of at least 2 nm.
Claim 8
Dependent Claim
17 words
An adsorbent according to claim 1, having a total specific surface area of 250-550 m 2 /g.
Claim 9
Dependent Claim
23 words
An adsorbent according to claim 1, having a specific surface area in pores with radius of 2.0-4.0 nm of 100-500 m 2 /g.
Claim 10
Dependent Claim
23 words
An adsorbent according to claim 1, having a specific pore volume in pores with radius of up to 2000 nm of 1.5-4 ml/g.
Claim 11
Dependent Claim
21 words
An adsorbent according to claim 9, having a specific pore volume in pores with radius of 100-2000 nm of 0.7-3 ml/g.
Claim 12
Dependent Claim
12 words
An adsorbent according to claim 1, wherein the metal-oxide-silica is X-ray amorphous.
Claim 13
Dependent Claim
14 words
An adsorbent according to claim 1, having a volume-weighted mean diameter of 5-50 micrometers.
Claim 14
Dependent Claim
23 words
An adsorbent according to claim 1, having a metal content, calculated as mole fraction of the total metal plus silicon content, of 0.1-0.3.
Claim 15
Dependent Claim
16 words
An adsorbent according to claim 1, having a sodium content of less than 0.5% by weight.
References Cited (Backward Citations)
US2777822A
Cited
SU136317A1
Cited
US3346509A
Cited
US3650989A
Cited
US4648975A
Cited
US4617108A
Cited
EP0216730A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |