US4101460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High performance ion exchange composition
Assignee: Dow Chemical Co
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Filing: 1975-07-07
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Granted: 1978-07-18
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Expires: 1995-07-07
Abstract
Abstract An ion exchange composition comprising an insoluble substrate of a synthetic resin having ion exchanging sites at least on its available surface; and a finely divided, insoluble material comprising synthetic resin particles of from about 0.1 to about 5 microns median diameter (with respect to volume) having, at least on their outer surfaces, ion exchanging sites which attract the ion exchanging sites of the substrate, irreversibly attached as a monolayer to the available surface of the substrate. The composition is used for removal and separation of ions, and is especially useful in liquid ion exchange chromatography. For example, a chromatographic separation of halide ions is effected with high speed and resolution by contacting an aqueous solution thereof with a bed of the ion exchange composition which consists of surface sulfonated resin beads of a styrene-divinylbenzene copolymer to the surface of which is irreversibly attached a monolayer of quaternary ammonium-bearing styrene-divinylbenzene copolymer resin particles in the hydroxy form, and then eluting the bed with an aqueous sodium hydroxide solution.
Inventors
- 👤 Hamish Small
- 👤 Timothy S. Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/36; B01D15/361; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3214; B01J20/3217; B01J20/3221; B01J47/00; B01J47/016; C; C08; C08J; C08J7/00; C08J7/04
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
88 words
A composition of matter for exchanging ions comprising: Component A, an insoluble substrate which consists essentially of synthetic resin, having ion exchanging sites at least on its available surface; and Component B, a finely divided, insoluble material comprising synthetic resin particles of from about 0.1 micron to about 5 microns median diameter having, at least on their outer surfaces, ion exchanging sites which attract available sites of Component A; wherein the particles of Component B are irreversibly attached as a monolayer to the available surface of Component A.
Claim 2
Dependent Claim
88 words
A composition of matter for exchanging ions comprising: Component A, an insoluble substrate which consists essentially of synthetic resin, having ion exchanging sites at least on its available surface; and Component B, a finely divided, insoluble material comprising synthetic resin particles of from about 0.1 micron to about 5 microns median diameter having, at least on their outer surfaces, ion exchanging sites which attract available sites of Component A; wherein the particles of Component B are irreversibly attached as a monolayer to the available surface of Component A.
Claim 3
Dependent Claim
51 words
The composition of claim 1 wherein Component A comprises finely divided particles of about 5 to about 100 microns particle size which have ion exchanging sites at least on their available surfaces and Component B particles have ion exchanging sites substantially throughout the entirety of a majority of Component B particles.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the particle size of Component A particles is about 35 to about 75 microns.
Claim 5
Dependent Claim
21 words
The compositions of claim 1 wherein the diameter range of Component B particles is about 0.01 micron to about 10 microns.
Claim 6
Dependent Claim
21 words
The composition of claim 1 wherein the median diameter of Component B particles is from about 0.6 to about 1.8 micron.
Claim 7
Dependent Claim
20 words
The composition of claim 5 wherein the diameter range of Component B particles is about 0.05 to about 5 microns.
Claim 8
Dependent Claim
20 words
The composition of claim 6 wherein the diameter range of Component B particles is about 0.1 to about 2 microns.
Claim 9
Dependent Claim
26 words
The composition of claim 1 wherein the ion exchanging sites of Component A are anion exchanging sites and those of Component B are cation exchanging sites.
Claim 10
Dependent Claim
45 words
The composition of claim 8 wherein Component A comprises finely divided particles of a quaternary ammonium-bearing poly(vinylaromatic) resin of about 35 to about 75 microns particles size and Component B comprises sulfonated poly(vinylaromatic) resin particles of from about 0.6 to about 1.8 micron median diameter.
Claim 11
Dependent Claim
27 words
The composition of claim 8 wherein the ion exchanging sites of Component B are chelating sites which are attracted to the anion exchanging sites of Component A.
Claim 12
Dependent Claim
46 words
The composition of claim 10 wherein Component A comprises finely divided particles of a quaternary ammonium-bearing poly(vinylaromatic) resin of about 35 microns to about 75 microns particle size and Component B comprises aminocarboxylic-bearing poly(vinylaromatic) resin particles of from about 0.6 to about 1.8 micron median diameter.
Claim 13
Dependent Claim
26 words
The composition of claim 1 wherein the ion exchanging sites of Component A are cation exchanging sites and those of Component B are anion exchanging sites.
Claim 14
Dependent Claim
19 words
The composition of claim 12 wherein the ion exchanging sites of Component A are strong acid cation exchanging sites.
Claim 15
Dependent Claim
19 words
The composition of claim 12 wherein the ion exchanging sites of Component A are weak acid cation exchanging sites.
Claim 16
Dependent Claim
19 words
The composition of claim 12 wherein the ion exchanging sites of Component B are weak base anion exchanging sites.
Claim 17
Dependent Claim
19 words
The composition of claim 12 wherein the ion exchanging sites of Component B are strong base anion exchanging sites.
Claim 18
Dependent Claim
49 words
The composition of claim 12 wherein Component A comprises finely divided particles of a sulfonated poly(vinylaromatic) resin, said particles having about 35 microns to about 75 microns particle size and Component B comprises quaternary ammonium-bearing poly(vinylaromatic) resin particles of from about 0.6 micron to about 1.8 micron median diameter.
Claim 19
Dependent Claim
18 words
The composition of claim 17 wherein the sulfonated poly(vinylaromatic) resin of Component A is a surface-sulfonated styrene-divinylbenzene copolymer.
Claim 20
Dependent Claim
32 words
The composition of claim 18 wherein the particles of quaternary ammonium-bearing poly(vinylaromatic) resin of Component B have ion exchanging quaternary ammonium sites substantially throughout the entirety of a majority of the particles.
Claim 21
Dependent Claim
12 words
The composition of claim 1 wherein Component B particles are latex particles.
Claim 22
Dependent Claim
38 words
The composition of claim 20 wherein Component B consists essentially of latex particles of from about 0.1 micron to about 1 micron median diameter having a diameter range of about ±0.1 micron or less from the median diameter.
Claim 23
Dependent Claim
10 words
A chromatographic column packed with the composition of claim 2.
Claim 24
Dependent Claim
26 words
A process for preparing the composition of claim 1 wherein a liquid suspension of Component B particles is contacted with the available surface of Component A.
Claim 25
Dependent Claim
54 words
The process of claim 23 wherein Component A comprises finely divided particles of about 5 to about 100 microns particle size which have ion exchanging sites at least on their available surfaces and the composition is prepared by passing the liquid suspension of Component B particles through a column packed with Component A particles.
Claim 26
Dependent Claim
51 words
The process of claim 24 wherein the liquid suspension of Component B particles essentially comprises latex particles of from about 0.1 micron to about 1 micron median diameter having a diameter range of about ±0.1 micron or less from the median diameter and Component A particles are ion exchange resin beads.
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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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |