Lanxess Deutschland Gmbh

Pierre Vanhoorne

Reinhold M Klipper

Michael Schelhaas

Wolfgang Podszun

Wolfgang Zarges

Bernd Koop

Hans-Jurgen Wedemeyer

Areski Rezkallah

Olaf Halle

Georg Martin

Stefan Neumann

Jens Stoll

Bruno Hees

Rudolf Wagner

Wolfgang Wambach

Jenny Barbier

Hubertus Mittag

Stefan Hilger

Sladjana Baljak

Tian Lei Yang

Hans-Jürgen Wedemeyer

The invention relates to a process for preparing aminomethylated bead polymers using condensed formaldehydes and carbonyl halides.

Method for producing amino methylated bead polymerizates

Aminomethylated bead polymers for use as ion exchangers, especially as anion exchangers, or for the preparation of chelate resins, are prepared in the presence of 1,3-dichloropropane as solvent and swelling agent.

Process for preparing aminomethylated bead polymers

The invention relates to a process for preparing aminomethylated bead polymers from N-carboxymethylphthalimides, which are used as anion exchangers or can be converted further to chelate resins.

Method for producing amino methylated bead polymerizates from N-carboxylic acid methylphthalimide esters

The invention relates to a process for preparing aminomethylated bead polymers using condensed formaldehydes and carboxylic anhydrides.

The present invention relates to chelating resins containing methyleneaminoethylsulfonic acid groups, a process for producing them and also their use for removing heavy metals or metals of value from aqueous solutions having a pH of &#x3c;4, preferably from process water in or from the electronics industry, the electroplating industry or the mining industry.

Methylene aminoethyl sulfonic acid chelating resins

The invention relates to a process for producing non-agglomerating mixed bed ion exchangers or mixed bed components.

Non-agglomerating mixed bed ion exchangers

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.

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.

Strongly acidic cation exchangers with high mechanical, osmotic and oxidation stability can be prepared by sulfonating bead polymers formed from one or more vinylaromatic monomer(s), one or more crosslinker(s) and from 0.2 to 20% by weight of one or more vinyl ethers and/or vinyl esters.

Process for producing cation exchangers

The present invention relates to heat-stable anion exchangers based on at least one aromatic monomer and at least one crosslinker having structural elements of the general formula (I) where

Heat-stable anion exchangers

The present invention relates to novel ion exchangers comprising carboxyl groups and also &#x2014;(CH)NRRgroups having improved exchange kinetics and selectivity, a method for their production and also use thereof for the adsorption of metals, in particular arsenic, when these are additionally loaded with iron oxide/iron oxyhydroxide.

Chelate exchanger

The present invention relates to a process for producing weakly acidic cation exchangers of the polymethacrylic acid type by alkaline saponification of a crosslinked copolymer of alkyl methacrylate and methacrylic acid.

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Monheim, Germany

Pierre Vanhoorne