| 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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| 10/21/1999 | WO1999052948A1 Separations using ampholytic base polymers |
| 09/08/1999 | EP0939779A1 Anion exchange materials and processes |
| 08/24/1999 | US5942084 Process for the separation of sulphides from pulping liquors using amphoteric resins |
| 05/19/1999 | EP0814907A4 Polymer sorbent for ion recovery processes |
| 05/12/1999 | EP0914184A1 Apparatus and method for manipulating particles in a liquid medium by ultrasonic waves |
| 04/01/1999 | WO1999015273A1 Ion exchange |
| 04/01/1999 | CA2304787A1 Ion exchange |
| 03/10/1999 | CN1042434C Crosslinked methacrylic anhydride copolymers |
| 01/13/1999 | CN1204554A Ion-exchange resins, their preparation method and uses |
| 12/10/1998 | WO1998055219A1 Generating inorganic polymer electret in colloidal state |
| 12/10/1998 | CA2293420A1 Generating inorganic polymer electret in colloidal state |
| 12/09/1998 | EP0882508A2 Ion-exchange resins, their preparation and uses |
| 11/24/1998 | US5840192 Single-film membrane, process for obtaining it and use thereof |
| 11/11/1998 | EP0662099B1 Heterogeneous membrane and method |
| 09/30/1998 | EP0866815A2 Biocompatible compositions |
| 07/30/1998 | WO1998032915A1 A process for the separation of sulphides from pulping liquors using amphoteric resins |
| 07/28/1998 | CA1339973C Process for the production of an electrolyte for the production of alkali dichromates and chromic acid |
| 07/08/1998 | CN1187171A Method for producing crystalline inorganic ion exchange materials |
| 05/28/1998 | WO1998022517A1 Anion exchange materials and processes |
| 05/28/1998 | WO1998022516A1 Biocompatible compositions |
| 05/28/1998 | WO1998022162A1 Biocompatible compositions |
| 05/28/1998 | EP0866815A3 Biocompatible compositions |
| 04/14/1998 | US5738775 Core-sheath structure ion exchange nonwoven fabric substrate for desalting compartment; desalting water, production of pure water in electrical power, including nuclear power, generating industries |
| 02/04/1998 | EP0821655A1 Method for producing crystalline, inorganic ion exchange material |
| 01/07/1998 | EP0814907A1 Polymer sorbent for ion recovery processes |
| 11/20/1997 | WO1997043026A1 Apparatus and method for manipulating particles in a liquid medium by ultrasonic waves |
| 09/02/1997 | CA1339402C Ion exchange resin beads and processes for preparing them |
| 07/15/1997 | US5648400 Process for producing polymeric electrolyte complex and ion-exchange resin |
| 06/17/1997 | US5639861 Shperes; ion exchange resins; absorbers |
| 10/24/1996 | WO1996033131A1 Method for producing crystalline, inorganic ion exchange material |
| 09/19/1996 | WO1996028251A1 Polymer sorbent for ion recovery processes |
| 09/19/1996 | CA2217866A1 Polymer sorbent for ion recovery processes |
| 09/03/1996 | US5552474 Aqueous solutions of organopolysiloxane-ammonium compounds, methods of their manufacture and use |
| 07/23/1996 | US5539071 Crosslinked methacrylic anhydride copolymers |
| 04/09/1996 | US5506188 Adsorptive materials and process for producing them |
| 12/13/1995 | EP0686168A1 Single-film membrane, preparation method therefor and use thereof |
| 09/20/1995 | EP0672726A2 Aqueous solutions of organopolysiloxane-ammonium compounds, their preparation and use |
| 09/18/1995 | CA2144786A1 Aqueous solutions of organopolysiloxane-ammonium compounds, their manufacture and use |
| 07/12/1995 | EP0662099A1 Heterogeneous membrane and method |
| 06/20/1995 | US5425866 Electrically regenerable demineralizing apparatus |
| 12/28/1994 | EP0630685A1 Process for preparing of a polymeric ionexchange material with sulfonic functions |
| 12/07/1994 | CN1096008A Preparation of ion retardation resin for purifying waste water containing sodium thiocyanate |
| 09/28/1994 | EP0616845A1 Adsorptive materials and process for producing them |
| 09/13/1994 | US5346924 Heterogeneous ion exchange materials comprising polyethylene of linear low density or high density high molecular weight |
| 09/01/1994 | WO1994019399A1 Single-film membrane, preparation method therefor and use thereof |
| 05/03/1994 | US5308467 Electrically regenerable demineralizing apparatus |
| 03/31/1994 | WO1994006850A1 Heterogeneous membrane and method |
| 01/11/1994 | US5278193 Ion exchange resin beads having aminoalkylphosphonic groups and processes for preparing them |
| 12/15/1993 | EP0425590B1 PROCESS FOR STABILISING THE pH OF AQUEOUS FEED SOLUTIONS AND FOR ABSORBING AND BUFFERING URINE AND WOUND SECRETIONS |
| 12/08/1993 | CN1079229A Crosslinked methacrylic anhydride copolymers |
| 12/01/1993 | EP0572115A2 Crosslinked methacrylic anhydride copolymers |
| 11/30/1993 | CA2096492A1 Crosslinked methacrylic anhydride copolymers |
| 11/09/1993 | US5259936 Purified ion exchange resins and process |
| 08/03/1993 | US5232995 Copolymerization followed by acid hydrolysis of acetoxy group |
| 05/11/1993 | US5210149 Hydrolysis of acetoxy group to hydroxy |
| 12/23/1992 | EP0519383A1 Purified amphoteric ion exchange resins and a process for their purification |
| 12/23/1992 | CN1067228A Ion exchange pile of filament resin for treatment of water |
| 09/16/1992 | EP0503651A1 Electrically regenerable demineralizing apparatus |
| 08/12/1992 | EP0313633B1 Method and apparatus for treating water, water treated thus obtained and its utilization |
| 06/24/1992 | EP0491520A1 Kandite clay compositions |
| 06/18/1992 | CA2055365A1 Pillared interlayered kandite clay compositions |
| 05/08/1991 | EP0425590A1 PROCESS FOR STABILISING THE pH OF AQUEOUS FEED SOLUTIONS AND FOR ABSORBING AND BUFFERING URINE AND WOUND SECRETIONS. |
| 10/04/1990 | WO1990011348A1 PROCESS FOR STABILISING THE pH OF AQUEOUS FEED SOLUTIONS AND FOR ABSORBING AND BUFFERING URINE AND WOUND SECRETIONS |
| 09/29/1990 | CA2010726A1 Method of stabilizing the ph in aqueous nutrient solutions for terrestrial plants, aquatic animals and cell cultures as well as for the absorption and buffering of urine and woundsecretions |
| 03/07/1990 | EP0356803A2 Process for the preparation of an electrolyte for obtaining alkali metal bichromates and chromic acid |
| 01/31/1990 | EP0352949A1 Ion exchange resin beads and processes for preparing them |
| 05/03/1989 | EP0313633A1 Method and apparatus for treating water, water treated thus obtained and its utilization. |
| 11/17/1988 | WO1988008737A1 Method and apparatus for treating water, water treated thus obtained and its utilization |
| 08/23/1988 | CA1241131A1 Process for separating salts in aqueous streams |
| 04/19/1988 | US4738834 Treatment of technetium containing solutions |
| 05/05/1987 | CA1221493A1 Compounds and method of preparation by chlorosulfonation of difficulty sulfonatable poly(ether sulfone) |
| 03/17/1987 | CA1219208A1 Treatment of technetium containing solutions |
| 03/04/1987 | EP0139715B1 A method to purify water |
| 02/10/1987 | US4642193 Ion exchanging with hydrotalcite |
| 10/07/1986 | CA1212368A1 Spherical ion exchange resin, method for producing the same and method for adsorption treatment using the same |
| 09/30/1986 | US4614591 Method to purify water |
| 03/18/1986 | US4576969 Spherical ion exchange resin having matrix-bound metal hydroxide, method for producing the same and method for adsorption treatment using the same |
| 11/19/1985 | US4554376 Method for separating and purifying amino acid |
| 08/21/1985 | EP0152010A2 Purifying agent for cooling water used in nuclear reactors, and method for purification of the cooling water |
| 08/06/1985 | CA1191627A1 Trihalomethane precursor removal using ion exchange emulsions |
| 05/08/1985 | EP0139715A1 A method to purify water. |
| 05/02/1985 | EP0139061A2 Chlorosulphonated polysulphones, their preparation and their use in preparing sulphonated polysulphones |
| 04/10/1985 | EP0136692A2 Ion retardation process for separating salts in aqueous streams |
| 04/02/1985 | US4508852 Compositions and method of preparation by chlorosulfonation of difficultly sulfonatable poly(ether sulfone) |
| 01/15/1985 | US4493928 Crosslinked chitin derivatives |
| 10/23/1984 | US4478722 Using ion retardation resin |
| 10/16/1984 | US4477596 Crosslinking, hydrolysis or sulfonation, and quaternization a block polymer |
| 10/11/1984 | WO1984003881A1 A method to purify water |
| 07/03/1984 | CA1170255A1 Shaped material of chitin derivatives |
| 06/27/1984 | EP0111999A2 Spherical ion exchange resin, method for producing the same and method for adsorption treatment using the same |
| 05/29/1984 | US4451581 Ion exchange resin |
| 04/19/1983 | US4380590 Emulsion copolymer cation exchange resins |
| 03/29/1983 | US4378439 Purification of saline solutions |
| 03/08/1983 | US4376199 Acylation, dialysis, ion exchane resin |
| 02/08/1983 | US4373096 Crosslinked chitin derivatives |
| 12/21/1982 | US4365023 Which has anionic and cationic blocks separated by nonionic blocks |
| 10/26/1982 | US4356236 Spherically shaped material comprising acylated product of de-N-acetylated chitin |
| 10/14/1982 | WO1982003398A1 Ion exchange resin |
| 09/14/1982 | CA1131624A1 Spherically shaped material comprising acylated product of de-n-acetylated chitin |
| 06/22/1982 | US4336161 Composite materials comprising deformable xerogel within the pores of particulate rigid supports useful in chromatography |