| Patents for B01J 43 - Amphoteric ion-exchange, i.e. using ion-exchangers having cationic and anionic groups; Use of material as amphoteric ion-exchangers; Treatment of material for improving their amphoteric ion-exchange properties (335) |
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| 06/15/1982 | US4335017 Filling pores of support with xerogel precursor, gelation |
| 04/20/1982 | CA1122209A1 Crosslinked polymeric substance |
| 03/23/1982 | CA1120647A1 Flocs for filtration and deionization prepared from cationic and anionic emulsion ion exchange resins |
| 05/06/1981 | EP0028126A1 Material produced from cross-linked ionic chitin derivative, its preparation and use |
| 04/28/1981 | CA1100242A1 Water softening method using thermally regenerable ion exchange resin |
| 04/07/1981 | CA1099049A1 Method for preparation of amphoteric ion-exchangers by substitution of hydrophilic polymers |
| 01/07/1981 | EP0021750A1 Production of spherically shaped material made of chitin derivative |
| 12/16/1980 | US4239854 Having carboxymethyl groups and amino groups |
| 11/18/1980 | CA1090045A1 Amphoteric ion exchange resins |
| 10/29/1980 | EP0018131A1 Crosslinked, carboxyalkylated and deacetylated derivative of chitin, process for preparation thereof, and use thereof as an adsorbent material |
| 10/21/1980 | US4229545 Made by encapsulating a polymer of a weak acid in a polymer of opposite ion-exchange type in the presence agents which inhibit the formation of salts which would block active exchange sites |
| 10/07/1980 | CA1087328A1 Process and apparatus for ion exchange by use of thermally regenerable resin |
| 09/09/1980 | US4221872 Process for removing unsaturation from ion exchange resins containing unquaternized amino groups by hydrogenation with imine |
| 06/03/1980 | US4206051 Process for demineralizing saline solutions |
| 05/13/1980 | US4202737 Ion exchange process for desalination |
| 04/29/1980 | US4200695 Micro-spherical beads of crosslinked copolymers |
| 04/02/1980 | EP0009395A1 Cation exchange process, certain cation exchange resins and materials useful therein and processes for their preparation |
| 04/02/1980 | EP0009394A1 Ion exchange resin flocs, their preparation and regeneration and ion exchange and filtration processes using them |
| 01/22/1980 | US4184948 Countercurrent flow, multizonal |
| 12/11/1979 | US4178270 Method for supporting hydrous metal oxide on carrier |
| 09/11/1979 | US4167610 Ion exchange products and processes using crosslinked allylamine copolymers |
| 05/15/1979 | US4154801 Process for purifying alkali metal hydroxide or carbonate solutions |
| 04/17/1979 | US4150205 Composite ion exchange resins having low residual amounts of quaternary ammonium cation |
| 02/13/1979 | US4139499 Thermally reversible amphoteric ion exchange resins of improved demineralization capacity |
| 01/23/1979 | US4136067 Hybrid ion exchange resins with improved properties |
| 01/16/1979 | US4134815 Amphoteric composite resins and method of preparing same by polymerization of a two-phase dispersion of monomers |
| 12/26/1978 | CA1045291A1 Method for preparation of amphoteric ion exchangers with the hydrophilic polymeric matrix |
| 09/19/1978 | US4115297 Thermally regenerable amphoteric ion exchangers prepared by sequential treatment of polymeric beads with two reagents of opposing acid base character |
| 06/27/1978 | US4097420 Method for preparation of macroporous amphoteric ion exchangers with highly crosslinked hydrophilic polymeric matrix |
| 05/02/1978 | US4087357 Ion exchanging |
| 04/25/1978 | US4086299 With unsaturated carboxy acid |
| 01/10/1978 | US4067825 Method for preparation of amphoteric ion-exchangers by substitution of hydrophilic polymers |
| 11/09/1976 | US3991017 Ion exchange resins derived from hybrid copolymers |
| 06/22/1976 | US3965070 Crosslinked vinylcarbonyl resins having α-amino acid functionality |
| 05/18/1976 | US3957698 Thermally reversible, amphoteric ion exchange resins consisting of crosslinked microbeads embedded in crosslinked matrix of opposite exchange group type |