US3672131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stationary phase for selective sorption
Assignee: Individual
•
Filing: 1970-01-15
•
Granted: 1972-06-27
•
Expires: 1990-01-15
Abstract
Abstract Stationary phases for chromatographic ion exchange or catalysis produced by esterification of solid substances having acidic OH groups at the surface as Components I with organic compounds as Components II. The specific surface area of Components I is above 100 cm2/g and Components II each have at least one hetero atom in their molecules, disregarding the oxygen connected to a carbon atom in the molecule for esterification with the acid OH group in Component I. By hetero-atoms is meant an atom other than carbon and hydrogen.
Inventors
- 👤 Istvan Halasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:27
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/02; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; B01J20/22; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28014; B01J20/28016; B01J20/28019; B01J20/28054; B01J20/28057; B01J20/281; B01J20/286; B01J20/29; B01J20/30; B01J20/3071; B01J20/3078; B01J20/3092; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3248; B01J20/3251; B01J20/3268; B01J20/3272; B01J20/3289; B01J31/00; B01J31/02; B01J31/0215; B01J31/0229; B01J31/0231; B01J31/0232; B01J31/0234; B01J31/0235; B01J31/0237; B01J31/0255; B01J31/0257; B01J31/0259; B01J31/0271; B01J39/00; B01J39/08; B01J39/16; B01J39/17; B01J41/00; B01J41/08; B01J41/09; C01B; C01B33/00; C01B33/113; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/58; C01P; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
14 words
A phase as claimed in claim 1, said solid compound being an inorganic compound.
Claim 2
Dependent Claim
14 words
A phase as claimed in claim 2, the inorganic compound being essentially silica gel.
Claim 3
Dependent Claim
14 words
A phase as claimed in claim 2, the inorganic compound being essentially porous glass.
Claim 4
Dependent Claim
28 words
A phase as claimed in claim 2, the inorganic compound being essentially SiO2 particles having OH groups at the surface and the particles being adhered to a support.
Claim 5
Dependent Claim
13 words
A phase as claimed in claim 1, the hetero-aTom being a nitrogen atom.
Claim 6
Dependent Claim
13 words
A phase as claimed in claim 1, the hetero-atom being a sulfur atom.
Claim 7
Dependent Claim
13 words
A phase as claimed in claim 1, the hetero-atom being a phosphorous atom.
Claim 8
Dependent Claim
13 words
A phase as claimed in claim 1, the hetero-atom being a metal atom.
Claim 9
Dependent Claim
16 words
A phase as claimed in claim 1, the alcohol having a molecular weight greater than 300.
Claim 10
Dependent Claim
46 words
A process for preparing the phase claimed in claim 2, wherein the inorganic compound is esterified with an alcohol selected from the group consisting of oxyalcohols and thioalcohols, said process comprising, heating the alcohol to at least 190* C. in the presence of the inorganic compound.
Claim 11
Dependent Claim
13 words
A process as claimed in claim 11, the alcohol being a hydroxy aldehyde.
Claim 12
Dependent Claim
18 words
A process as claimed in claim 11, the alcohols being monoalcohols, and then introducing said hetero-atom after esterification.
Claim 13
Dependent Claim
15 words
A process as claimed in claim 13, the introduction of the hetero-atom being by condensation.
Claim 14
Dependent Claim
25 words
A phase as claimed in claim 2, the alcohol containing a substiuent selected from the group consisting of halogen, sulfonic acid group, and hydroxyamino group.
Claim 15
Dependent Claim
15 words
A phase as claimed in claim 2, the inorganic compound being essentially a metal oxide.
References Cited (Backward Citations)
US2657149A
Cited
US3116161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |