US5271833A
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Polymer-coated carbon-clad inorganic oxide particles
Assignee: University of Minnesota System
•
Filing: 1992-10-20
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Granted: 1993-12-21
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Expires: 2012-10-20
Abstract
Abstract Polymer-coated carbon-clad inorganic oxide particles are disclosed which are useful in sorbent applications, particularly as packing materials for High Performance Liquid Chromatography (HPLC). A method for the preparation of a chromatographic support material is also disclosed which comprises coating carbon-clad inorganic oxide particles with a monomer or oligomer and cross-linking the monomer or oligomer.
Inventors
- 👤 Eric F. Funkenbusch
- 👤 Peter W. Carr
- 👤 Douglas A. Hanggi
- 👤 Thomas P. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/02; B01J20/06; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/324; B01J20/3242; B01J20/3268; B01J20/327; B01J20/3272; B01J20/328; B01J20/3282
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
56 words
A chromatography column selected from the group consisting of a liquid chromatograph column, a gas chromatography column and a supercritical fluid chromatography column, comprising a packing consisting of a plurality of particles comprising an inorganic oxide core, a carbon cladding on said core, and a cross-linked polymer coating on said carbon cladding contained within said column.
Claim 2
Dependent Claim
56 words
A chromatography column selected from the group consisting of a liquid chromatograph column, a gas chromatography column and a supercritical fluid chromatography column, comprising a packing consisting of a plurality of particles comprising an inorganic oxide core, a carbon cladding on said core, and a cross-linked polymer coating on said carbon cladding contained within said column.
Claim 3
Dependent Claim
21 words
The chromatography column of claim 1 wherein said inorganic oxide core has a diameter of about 1μ to about 1 cm.
Claim 4
Dependent Claim
11 words
The chromatography column of claim 1 wherein the particles are spherules.
Claim 5
Dependent Claim
15 words
The chromatography column of claim 1 wherein the particles have diameters of about 2-200 microns.
Claim 6
Dependent Claim
18 words
The chromatography column of claim 1 wherein the particles have surface areas of about 2-80 m 2 /g.
Claim 7
Dependent Claim
19 words
The chromatography column of claim 1 wherein the particles are porous and have pore sizes of about 50-1000 Å.
Claim 8
Dependent Claim
25 words
The chromatography column of claim 1 wherein said inorganic oxide is selected from the group consisting of Group II, Group III and Group IV metals.
Claim 9
Dependent Claim
35 words
The chromatography column of claim 7 wherein the inorganic oxide is selected from the group consisting of HfO 2 , ZrO 2 , SiO 2 , Al 2 O 3 , TiO 2 and MgO.
Claim 10
Dependent Claim
14 words
The chromatography column of claim 8 wherein said inorganic oxide is ZrO 2 .
Claim 11
Dependent Claim
21 words
The chromatography column of claim 9 wherein said ZrO 2 core has a surface area of about 5-300 m 2 /g.
Claim 12
Dependent Claim
22 words
The chromatography column of claim 9 wherein said ZrO 2 core is porous and has a pore size of about 20-5,000 Å.
Claim 13
Dependent Claim
17 words
The chromatography column of claim 9 wherein said ZrO 2 core has a diameter of about 1-500μ.
Claim 14
Dependent Claim
22 words
The chromatography column of claim 9 wherein said carbon-clad ZrO 2 core has a surface area of about 5-300 m 2 /g.
Claim 15
Dependent Claim
23 words
The chromatography column of claim 9 wherein said carbon-clad ZrO 2 core is porous and has a pore size of about 20-5,000 Å.
Claim 16
Dependent Claim
19 words
The chromatography column of claim 9 wherein said carbon clad ZrO 2 core has a diameter of about 1-500μ.
Claim 17
Dependent Claim
20 words
The chromatography column of claim 1 wherein said carbon cladding has a thickness which does not exceed about 20 Å.
Claim 18
Dependent Claim
12 words
The chromatography column of claim 1 wherein the core is essentially non-porous.
Claim 19
Dependent Claim
54 words
An absorber selected from the group consisting of a batch adsorber, a fluidized bed adsorber and a pressure-swing adsorption apparatus, comprising an adsorptive medium consisting of a plurality of particles comprising an inorganic oxide core, a carbon cladding on said core, and a cross-linked polymer coating on said carbon cladding contained within said absorber.
Claim 20
Dependent Claim
54 words
An absorber selected from the group consisting of a batch adsorber, a fluidized bed adsorber and a pressure-swing adsorption apparatus, comprising an adsorptive medium consisting of a plurality of particles comprising an inorganic oxide core, a carbon cladding on said core, and a cross-linked polymer coating on said carbon cladding contained within said absorber.
Claim 21
Dependent Claim
20 words
The absorber of claim 18 wherein said inorganic oxide core has a diameter of about 1μ to about 1 cm.
Claim 22
Dependent Claim
10 words
The absorber of claim 18 wherein the particles are spherules.
Claim 23
Dependent Claim
14 words
The absorber of claim 18 wherein the particles have diameters of about 2-200 microns.
Claim 24
Dependent Claim
17 words
The absorber of claim 18 wherein the particles have surface areas of about 2-80 m 2 /g.
Claim 25
Dependent Claim
18 words
The absorber of claim 18 wherein the particles are porous and have pore sizes of about 50-1,000 Å.
Claim 26
Dependent Claim
24 words
The absorber of claim 18 wherein said inorganic oxide is selected from the group consisting of Group II, Group III and Group IV metals.
Claim 27
Dependent Claim
34 words
The absorber of claim 18 wherein said inorganic oxide is selected from the group consisting of HfO 2 , ZrO 2 , SiO 2 , Al 2 O 3 , TiO 2 and MgO.
Claim 28
Dependent Claim
20 words
The absorber of claim 18 wherein said ZrO 2 core has a surface area of about 5-300 m 2 /g.
Claim 29
Dependent Claim
13 words
The absorber of claim 18 wherein said inorganic oxide is ZrO 2 .
Claim 30
Dependent Claim
21 words
The absorber of claim 27 wherein said ZrO 2 core is porous and has a pore size of about 20-5,000 Å.
Claim 31
Dependent Claim
16 words
The absorber of claim 27 wherein said ZrO 2 core has a diameter of about 1-500μ.
Claim 32
Dependent Claim
21 words
The absorber of claim 27 wherein said carbon-clad ZrO 2 core has a surface area of about 5-300 m 2 /g.
Claim 33
Dependent Claim
22 words
The absorber of claim 27 wherein said carbon-clad ZrO 2 core is porous and has a pore size of about 20-5,000 Å.
Claim 34
Dependent Claim
17 words
The absorber of claim 27 wherein said carbon-clad ZrO 2 core has a diameter of about 1-500μ.
Claim 35
Dependent Claim
19 words
The absorber of claim 18 wherein said carbon cladding has a thickness which does not exceed about 20 Å.
Claim 36
Dependent Claim
11 words
The absorber of claim 18 wherein the core is essentially non-porous.
Claim 37
Dependent Claim
54 words
A reactor selected from the group consisting of a fixed bed reactor, a fluidized bed reactor and a batch reactor, comprising a support material consisting of a plurality of particles comprising an inorganic oxide core, a carbon cladding on said core, and a cross-linked polymer coating on said carbon cladding contained within said reactor.
Claim 38
Dependent Claim
54 words
A reactor selected from the group consisting of a fixed bed reactor, a fluidized bed reactor and a batch reactor, comprising a support material consisting of a plurality of particles comprising an inorganic oxide core, a carbon cladding on said core, and a cross-linked polymer coating on said carbon cladding contained within said reactor.
Claim 39
Dependent Claim
20 words
The reactor of claim 35 wherein said inorganic oxide core has a diameter of about 1μ to about 1 cm.
Claim 40
Dependent Claim
10 words
The reactor of claim 35 wherein the particles are spherules.
Claim 41
Dependent Claim
14 words
The reactor of claim 35 wherein the particles have diameters of about 2-200 microns.
Claim 42
Dependent Claim
17 words
The reactor of claim 35 wherein the particles have surface areas of about 2-80 m 2 /g.
Claim 43
Dependent Claim
18 words
The reactor of claim 35 wherein the particles are porous and have pore sizes of about 50-1,000 Å.
Claim 44
Dependent Claim
24 words
The reactor of claim 35 wherein said inorganic oxide is selected from the group consisting of Group II, Group III and Group IV metals.
Claim 45
Dependent Claim
34 words
The reactor of claim 41 wherein said inorganic oxide is selected from the group consisting of HfO 2 , ZrO 2 , SiO 2 , Al 2 O 3 , TiO 2 and MgO.
Claim 46
Dependent Claim
13 words
The reactor of claim 42 wherein said inorganic oxide is ZrO 2 .
Claim 47
Dependent Claim
20 words
The reactor of claim 43 wherein said ZrO 2 core has a surface area of about 5-300 m 2 /g.
Claim 48
Dependent Claim
21 words
The reactor of claim 43 wherein said ZrO 2 core is porous and has a pore size of about 20-5,000 Å.
Claim 49
Dependent Claim
16 words
The reactor of claim 43 wherein said ZrO 2 core has a diameter of about 1-500μ.
Claim 50
Dependent Claim
21 words
The reactor of claim 43 wherein said carbon-clad ZrO 2 core has a surface area of about 5-300 m 2 /g.
Claim 51
Dependent Claim
22 words
The reactor of claim 43 wherein said carbon-clad ZrO 2 core is porous and has a pore size of about 20-5,000 Å.
Claim 52
Dependent Claim
17 words
The reactor of claim 43 wherein said carbon-clad ZrO 2 core has a diameter of about 1-500μ.
Claim 53
Dependent Claim
19 words
The reactor of claim 35 wherein said carbon cladding has a thickness which does not exceed about 20 Å.
Claim 54
Dependent Claim
11 words
The reactor of claim 35 wherein the core is essentially non-porous.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-20 | 1997-06-21 | 1997-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-20 | 2001-06-21 | 2001-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-20 | 2005-06-21 | 2005-12-21 | $7700.00 | Window Closed / Lapsed |