US3722181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic packing with chemically bonded organic stationary phases
Assignee: EIDP Inc
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Filing: 1970-05-22
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Granted: 1973-03-27
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Expires: 1990-05-22
Abstract
Abstract A process for making a chromatographic packing having a polymeric stationary phase in which molecules having the formula WHEREIN R3'' is a hydroxyl, or an aliphatic or aromatic hydrocarbon monovalent radical, and R4 is a monovalent aliphatic or aromatic hydrocarbon radical, ARE PARTIALLY PREPOLYMERIZED, CHEMICALLY BONDED TO A POLYVALENT METAL-CONTAINING SUBSTRATE, THE METAL HAVING A VALENCE OF 3-5, AND FURTHER POLYMERIZED. The polymeric stationary phase has a repeating unit of the formula WHEREIN A is -O- or a monovalent aliphatic or aromatic hydrocarbon radical, AND IS CHEMICALLY BONDED TO THE SURFACE OF THE SUBSTRATE BY AN WHERE SILICON IS PART OF A REPEATING UNIT.
Inventors
- 👤 J Kirkland
- 👤 P Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:39
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/282; B01J20/283; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3214; B01J20/3217; B01J20/3219; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3261; B01J20/3268; B01J20/3272; B01J20/3276; C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G83/00; C08G83/001
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
132 words
An improved process for performing chromatographic separations comprising: a. placing the material to be separated in a carrier fluid; b. contacting said material and said carrier fluid with a packing having a polyvalent metal-containing substrate and a stationary phase, said stationary phase comprising a polymer being sufficiently porous to allow penetration by said material and carrier fluid and having the repeating unit of the formula wherein A is -O- or a monovalent aliphatic or aromatic hydrocarbon radical and R is a monovalent or aliphatic or aromatic hydrocarbon radical, said metal of said substrate having a valence of 3-5, said stationary phase being chemically bonded to the surface of said substrate by an linkage, wherEin M is said polyvalent metal and is part of one of said repeating units of said stationary phase.
Claim 2
Independent Claim
140 words
An apparatus for use in chromatographic separations comprising a resolving zone through which materials to be separated are passed, said resolving zone comprising a packing having a polyvalent metal-containing substrate and a stationary phase having an average thickness of about 30 A* to 10,000 A*, said stationary phase comprising a porous polymer having the repeating unit of the formula wherein A is -O- or a monovalent aliphatic or aromatic hydrocarbon radical and R is a monovalent aliphatic or aromatic hydrocarbon radical, said metal of said substrate having a valence of 3-5, said stationary phase being chemically bonded to the surface of said substrate by an linkage, wherein M is said polyvalent metal and is part of one of said repeating units of said stationary phase, and said polymer comprising 5 to 80 percent of the volume of said stationary phase.
Claim 3
Dependent Claim
10 words
The apparatus of claim 3 wherein said metal is silicon.
Claim 4
Dependent Claim
9 words
The apparatus of claim 3 wherein A is -O-.
Claim 5
Dependent Claim
16 words
The apparatus of claim 3 wherein said A is a monovalent aliphatic or aromatic hydrocarbon radical.
Claim 6
Dependent Claim
39 words
The apparatus of claim 3 wherein said stationary phase comprises at least two copolymerized portions, A in the first of said portions being -O-, and said A in the second of said portions being an aliphatic or aromatic hydrocarbon.
Claim 7
Dependent Claim
17 words
The apparatus of claim 3 wherein said packing is different in different parts of said resolving zone.
Claim 8
Dependent Claim
14 words
The apparatus of claim 3 wherein said resolving zone is disposed within a column.
Claim 9
Dependent Claim
16 words
The apparatus of claim 3 wherein said resolving zone comprises a thin layer upon a surface.
Claim 10
Dependent Claim
148 words
An improved process for performing chromatographic separations comprising: a. placing the material to be separated in a carrier fluid; b. contacting said material and said carrier fluid with a packing having a polyvalent metal-containing substrate and a stationary phase having an average thickness of about from 30 A* to 10,000 A*, said stationary phase comprising a porous polymer having the repeating unit of the formula wherein A is -O- or a monovalent aliphatic or aromatic hydrocarbon radical and R is a monovalent or aliphatic or aromatic hydrocarbon radical, said metal of said substrate having a valence of 3-5, said stationary phase being chemically bonded to the surface of said substrate by an linkage, wherein M is said polyvalent metal and is part of one of said repeating units of said stationary phase, and said polymer comprising about 5 to 80 percent of the volume of said stationary phase.
Claim 11
Dependent Claim
10 words
The process of claim 11 wherein said metal is silicon.
Claim 12
Dependent Claim
9 words
The process of claim 11 wherein A is -O-.
Claim 13
Dependent Claim
15 words
The process of claim 11 wherein A is a monovalent aliphatic or aromatic hydrocarbon radical.
Claim 14
Dependent Claim
39 words
The process of claim 11 wherein said packing comprises at least two copolymerized portions, A in the first of said portions being -O-, and A in the second of said portions being a monovalent aliphatic or aromatic hydrocarbon radical.
Claim 15
Dependent Claim
16 words
The process of claim 11 wherein said packing is different in different parts of said column.
Claim 16
Dependent Claim
14 words
The process of claim 11 wherein said resolving zone is disposed within a column.
Claim 17
Dependent Claim
14 words
The process of claim 11 wherein packing comprises a thin layer upon a surface.
References Cited (Backward Citations)
US3514925A
Cited
US3500616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |