US3873648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for separating mixtures of orthophosphoric esters
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1972-07-07
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Granted: 1975-03-25
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Expires: 1992-07-07
Abstract
Abstract This invention relates to a method for separating mixtures of orthophosphoric monoesters and orthophosphoric diesters which comprises passing a mixture of orthophosphoric monoester and orthophosphoric diester in nonionizing solvent through an acid exchange resin possessing ions of the sulfonic type to preferentially retain the orthophosphoric monoester and thereafter washing the resin with an ionizing solvent to elute the orthophosphoric monoester and regenerate the resin.
Inventors
- 👤 Daniel Balde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:41
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/025; C07F9/09
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A METHOD FOR SEPARATING MIXTURES OF SATURATED ORTHOPHOSPHORIC MONOESTERS HAVING LESS THAN 14 CARBON ATOMS AND SATURATED ORTHOPHOSPHOIC DIESTERS HAVING LESS THAN 14 CARBON ATOMS, SAID MIXTURES CONTAINING FROM ABOUT 30% OF THE MONOESTERS AND ABOUT 70% OF THE DIDIESTERS TO ABOUT 70% OF THE MONOESTERS AND ABOUT 30% OF THE DIESTERS, WHICH COMPRISES PASSING A MIXTURE OF ORTHOPHOSPHORIC MONOESTER AND ORTHOPHOSPHORIC DIESTER IN A NONIONIZING SOLVENT THROUGH AN ACID EXCHANGE RESIN POSSESSING IONS OF THE SULFONIC TYPE TO PREFERENTIALLY RETAIN THE ORTHOPHOSPHORIC MONOESTER AND THEREAFTER WASHING THE RESIN WITH AN IONIZING SOLVENT TO ELUTE THE ORTHO PHOSPHORIC MONOESTER AND REGENERATED THE RESIN.
Claim 2
Independent Claim
103 words
A METHOD FOR SEPARATING MIXTURES OF SATURATED ORTHOPHOSPHORIC MONOESTERS HAVING LESS THAN 14 CARBON ATOMS AND SATURATED ORTHOPHOSPHOIC DIESTERS HAVING LESS THAN 14 CARBON ATOMS, SAID MIXTURES CONTAINING FROM ABOUT 30% OF THE MONOESTERS AND ABOUT 70% OF THE DIDIESTERS TO ABOUT 70% OF THE MONOESTERS AND ABOUT 30% OF THE DIESTERS, WHICH COMPRISES PASSING A MIXTURE OF ORTHOPHOSPHORIC MONOESTER AND ORTHOPHOSPHORIC DIESTER IN A NONIONIZING SOLVENT THROUGH AN ACID EXCHANGE RESIN POSSESSING IONS OF THE SULFONIC TYPE TO PREFERENTIALLY RETAIN THE ORTHOPHOSPHORIC MONOESTER AND THEREAFTER WASHING THE RESIN WITH AN IONIZING SOLVENT TO ELUTE THE ORTHO PHOSPHORIC MONOESTER AND REGENERATED THE RESIN.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the resin is a strong-acid resin derived from the sulfonation of styrene-divinylbenzene copolymer and possessing 2-16% crosslinking and from 20-400 mesh size.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein the resin is a strong-acid resin of the gel type derived from the sulfonation of styrene-divinylbenzene copolymer and possessing 8% crosslinking and from 16-50 mesh size.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein the resin is a strong-acid resin of the macroreticular type derived from the sulfonation of styrene-divinylbenzene copolymer and possessing 20% cross-linking and from 16-50 mesh size.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein the nonionizing solvent is a hydrocarbon selected from the group consisting of hexane, heptane, benzene, or toluene.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the ionizing solvent is selected from the group consisting of water or ethyl alcohol.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein elution of the orthophosphoric monoester and washing of the ion exchange resin is carried out by countercurrent flow of solvent.
Claim 9
Dependent Claim
23 words
The method of claim 1 wherein the solvents obtained after passage of the ionizing and nonionizing solvents respectively are recycled at least once.
References Cited (Backward Citations)
US2818421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |