Patent application number | Description | Published |
20080234398 | Monodisperse weakly acidic cation exchangers - The present invention relates to a process for producing novel monodisperse cation exchangers of the poly(meth)acrylic acid type, the ion exchangers themselves, and also use thereof and to the use of intermediate products as supports for enzymes and the systems resulting therefrom as enzyme catalysts for the preparation of fuels and in transesterification reactions and esterification reactions. | 09-25-2008 |
20080272055 | Conditioning of ion exchangers for adsorption of oxoanions - The present invention relates to the use of inorganic salts for increasing the adsorption of oxoanions and/or thioanalogues thereof to metal-doped ion exchangers, preferably to iron oxide/iron oxyhydroxide-containing ion exchangers, preferably from water or aqueous solutions, and also the conditioning of these metal-doped ion exchangers having increased adsorption behaviour toward oxoanions and/or thioanalogues thereof by using inorganic salts with the exception of amphoteric ion exchangers which have both acidic and basic groups as functional groups. | 11-06-2008 |
20090022638 | Ion exchanger for winning metals of value - The present invention relates to the use of monodisperse, macroporous anion exchangers of type I or type II in hydrometallurgical processes for winning metals of value. | 01-22-2009 |
20090045137 | Method of producing monodisperse chelate resins - The present invention relates to a method of producing novel monodisperse chelate resins based on crosslinked polymer beads containing aminomethyl groups and/or aminomethyl nitrogen heterocyclic groups that have a high uptake capacity for heavy metals and rapid kinetics. | 02-19-2009 |
20090057231 | MONODISPERSE BORON-SELECTIVE RESINS - The present invention relates to macroporous, monodisperse boron-selective ion exchangers having improved boron uptake kinetics and improved boron capacity, containing N-methylglucamine structures, having a median diameter D between 550 and 750 μm and a volumetric fraction of beads between 0.9 D and 1.1 D of at least 75%. | 03-05-2009 |
20090107918 | AMPHOTERIC ION EXCHANGERS - The present invention relates to novel amphoteric ion exchangers which possess not only phthalamide groups of the formula (I) | 04-30-2009 |
20090158896 | Monodisperse, Macroporous Chelating Resins in Metal Winning - The present invention relates to the use of monodisperse, macroporous chelating resins in the recovery of metals in hydrometallurgical processes, in particular in resin-in-pulp processes. | 06-25-2009 |
20090215946 | PROCESS FOR PREPARING MONOMER COMPLEXES - Disclosed are processes for preparing monomer complexes that include contacting 2,3,5,6-tetraaminopyridine free base in water with 2,5-dihydroxy terephthalic acid dipotassium salt to form an aqueous mixture, and adjusting the pH of the aqueous mixture to within the range of from about (3) to about (5) to precipitate the monomer complex. Processes of polymerizing the monomer complexes, polyareneazoles, filaments and yarns are also disclosed. | 08-27-2009 |
20110089116 | METHOD FOR IMPROVED REMOVAL OF CATIONS BY MEANS OF CHELATING RESINS - The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having aminomethylphosphonic acid groups and iminodimethylphosphonic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, and a markedly lengthened loading duration of the chelating resin, to the chelating exchangers themselves, and also to uses thereof. | 04-21-2011 |
20110108488 | BORON-SELECTIVE RESINS - The present invention relates to boron-selective resins containing glucamide structures, a method for production thereof and also use thereof for removing boron from liquids, preferably from seawater, drinking water or process waters in or from the electronics industry. | 05-12-2011 |
20110132844 | METHOD FOR IMPROVED REMOVAL OF CATIONS BY MEANS OF CHELATING RESINS - The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having acetic acid and/or iminodiacetic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, to the chelating exchangers themselves, and also to uses thereof. | 06-09-2011 |