Patent US3716482A successfully refreshed from Google Patents.
US3716482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion exchanger with sponge structure and process of using same
Assignee: Bayer AG
•
Filing: 1970-09-14
•
Granted: 1973-02-13
•
Expires: 1990-09-14
Abstract
Abstract Organic impurities and inorganic anions are removed from an aqueous liquid by treating the liquid with a particulate anion exchange resin containing strongly basic groups and having a mean pore diameter of at least 100 Angstrom units.
Inventors
- 👤 H Corte
- 👤 A Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:42
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/286; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
A method of treating liquid media to remove anions and coloring matter therefrom which comprises contacting said media with an anion exchanger produced by a process which comprises (a) dissolving a major amount of a monovinyl carbocyclic aromatic compound and a minor amount of a copolymerizable polyethylenically unsaturated monomer in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent and being present in an amount sufficient to impart a spongelike porosity to the copolymer formed therein, (b) incorporating said solution into an excess of water to form a dispersion of droplets and (c) copolymerizing said monovinyl carbocyclic aromatic compound and said polyethylenically unsaturated monomer while suspended in said aqueous medium and in the presence of said organic liquid and recovering the resulting copolymer in the form of opaque resin beads, and (d) then haloalkylating and aminating said copolymer beads.
Claim 2
Independent Claim
167 words
A method of treating liquid media to remove anions and coloring matter therefrom which comprises contacting said media with an anion exchanger produced by a process which comprises (a) dissolving a major amount of a monovinyl carbocyclic aromatic compound and a minor amount of a copolymerizable polyethylenically unsaturated monomer in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent and being present in an amount sufficient to impart a spongelike porosity to the copolymer formed therein, (b) incorporating said solution into an excess of water to form a dispersion of droplets and (c) copolymerizing said monovinyl carbocyclic aromatic compound and said polyethylenically unsaturated monomer while suspended in said aqueous medium and in the presence of said organic liquid and recovering the resulting copolymer in the form of opaque resin beads, and (d) then haloalkylating and aminating said copolymer beads.
Claim 3
Independent Claim
159 words
A method of treating liquid media to remove anions and coloring matter therefrom which comprises contacting said media with an anion exchanger produced by a process which comprises (a) dissolving a major amount of styrene and a minor amount of divinyl benzene in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent, said solvent being present in an amount sufficient to impart a spongelike porosity to the copolymer formed therein; (b) incorporating said solution into an excess of water to form a dispersion of droplets; and (c) copolymerizing said styrene and said divinyl benzene while suspended in said aqueous medium and in the presence of said inert organic liquid, the resulting copolymer being recovered in the form of opaque resin beads, and (d) then haloalkylating and aminating the aforesaid resin beads.
Claim 4
Independent Claim
159 words
A method of treating liquid media to remove anions and coloring matter therefrom which comprises contacting said media with an anion exchanger produced by a process which comprises (a) dissolving a major amount of styrene and a minor amount of divinyl benzene in an inert organic liquid which is a solvent for styrene but not for linear polystyrene, said inert organic liquid being selected from the group consisting of an inert aliphatic oxygen-containing solvent and an inert aliphatic hydrocarbon solvent, said solvent being present in an amount sufficient to impart a spongelike porosity to the copolymer formed therein; (b) incorporating said solution into an excess of water to form a dispersion of droplets; and (c) copolymerizing said styrene and said divinyl benzene while suspended in said aqueous medium and in the presence of said inert organic liquid, the resulting copolymer being recovered in the form of opaque resin beads, and (d) then haloalkylating and aminating the aforesaid resin beads.
Claim 5
Dependent Claim
109 words
A process in which an aqueous liquid containing both organic impurities and inorganic anions is treated with a particulate anion-exchange resin containing strongly basic groups, said resin having pores therein of a mean pore diameter of at least about 100 Angstrom units, said anion-exchange resin having been produced by copolymerizing a monomer having one polymerizable double bond, and at least 25 percent of a cross-linking agent having two polymerizable double bonds, in a solution in an organic liquid which is a solvent for the monomer mixture, but is not a solvent for the copolymer at room temperature, the solvent constituting from 30 to 80 percent of the total mixture.
Claim 6
Dependent Claim
109 words
A process in which an aqueous liquid containing both organic impurities and inorganic anions is treated with a particulate anion-exchange resin containing strongly basic groups, said resin having pores therein of a mean pore diameter of at least about 100 Angstrom units, said anion-exchange resin having been produced by copolymerizing a monomer having one polymerizable double bond, and at least 25 percent of a cross-linking agent having two polymerizable double bonds, in a solution in an organic liquid which is a solvent for the monomer mixture, but is not a solvent for the copolymer at room temperature, the solvent constituting from 30 to 80 percent of the total mixture.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 3 in which said resin has at least 10 percent of its total pore volume in the form of pores greater than 350 Angstrom units in width.
Claim 8
Dependent Claim
23 words
A process as claimed in claim 3 in which the monomer is a monovinyl compound and the cross-linking agent is a divinyl compound.
Claim 9
Dependent Claim
15 words
A process as claimed in claim 3 in which the cross-linking agent is divinyl benzene.
Claim 10
Dependent Claim
13 words
A process as claimed in claim 6 in which the monomer is styrene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |