Lanxess Deutschland Gmbh

Bayer Aktiengesellschaft

Bayer Materialscience Ag

E.i. Dupont De Nemours and Company

Magellan Systems International LLC

Other

Lanxess Sybron Chemicals Inc.

Michael Schelhaas

Reinhold M Klipper

Manfred Jautelat

Christoph Gürtler

Dietmar Wastian

Pierre Vanhoorne

Joachim Zechlin

Georg Martin

Stefan Neumann

Georg Ronge

Tim Loddenkemper

Kai Verkerk

Katrin Joschek

Wilfried Pinke

Jens Stoll

Pieter Ooms

David J Rodini

Carl Casser

Wolfgang Zarges

Doetze Jakob Sikkema

Christian Laue

Henry Giera

Christoph G&uuml;rtler

Anthony P Tirio

Ralf Demuth

Phil Fatula

Duilio Rossoni

Wolfgang Fischer

Wolfgang Podszun

Reinhard Halpaap

Jan Weikard

Dietmar Bielefeldt

Michael Mager

Steven R Allen

Hasan Dindi

Dorota Greszta-Franz

Joachim Simon

Olaf Halle

Beate Baumbach

James Arnold Schultz

Michael Grahl

Hans-Karl Soest

Thomas Stingl

Ulrich Litzinger

Joachim Haider

Gerhard Arnold Braun

Michaela Meiers

Helmut Greiving

Diethelm Rappen

Qinghong Fu Adkins

Wolfgang Wambach

Christian Füssel

Kamelia Detig-Karlou

Hans Karl Soest

Kartin Joschek

Wolfgang Zargas

The invention relates to a method of producing monodisperse amidomethylated vinylaromatic bead polymers, to ion exchangers prepared from these monodisperse amidomethylated vinylaromatic bead polymers by alkaline hydrolysis, to the method of using said monodisperse amidomethylated vinylaromatic bead polymers in the manufacture of ion exchangers and chelating resins, and also to the method of using these ion exchangers in the removal of heavy metals and noble metals from aqueous solutions or gases.

Method for producing monodisperse, amido-methylated vinyl-aromatic bead polymers

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

There is disclosed a process for transporting fracture fluid additives underground to oil and gas wells by attaching a fracture fluid additive to an ion exchange resin and flowing the ion exchange resin underground and thereafter releasing the frac fluid additives from the ion exchange resins and also there is provided the use of an ion exchange resin as a proppant and a frac fluid lubricant.

Process for transporting fracture ('frac') fluid additives to oil and gas wells utilizing ion exchange resin

The present application relates to novel gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where or derivatives thereof or &#x2014;C&#x2550;S(NH),

Picolylamine resins

The present application relates to novel monodisperse, gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, whereRis an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, Ris a radical &#x2014;(CH)&#x2014;COOR, Ris a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2, q is an integer from 1 to 5 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.

The present invention relates to a method of producing novel chelate resins based on crosslinked polymer beads starting with methacrylic compounds, containing aminomethyl groups and/or aminomethyl nitrogen heterocyclic groups as functional groups, that have a high uptake capacity for heavy metals and rapid kinetics.

Method for producing chelate 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.

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.

The present invention relates to novel amphoteric ion exchangers which possess not only phthalamide groups of the formula (I) but also &#x2014;(CH)NRRgroups and/or if appropriate &#x2014;(CH)NRRRgroups, wherein m is an integer from 1 to 4 and R, R, Rin each case independently of one another are hydrogen, &#x2014;CH, &#x2014;CHCH, &#x2014;CHCHCH, benzyl, &#x2014;OCHCHor &#x2014;CHCHOH and X is H or Na or K, to a process for production thereof and also use thereof.

Amphoteric ion exchangers

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.

Method of producing monodisperse chelate resins

Process for transporting fracture ('FRAC') fluid additives to oil and gas wells utilizing ion exchange resin

Disclosed are processes for preparing monomer complexes that include contacting 2,3,5,6-tetraminopyridine 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.

Process for preparing monomer complexes

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 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.

Conditioning of ion exchangers for adsorption of oxoanions

Disclosed are processes for preparing polyareneazole polymers including contacting a molar excess of a free base in water with a terephthalic acid salt to form an aqueous mixture, adjusting the pH to precipitate a monomer complex, contacting the monomer complex with metal powder, and polymerizing the monomer complex. Polyareneazoles, filaments and yarns are also disclosed.

Processes for increasing polymer inherent viscosity

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Kö'ln, Germany

Michael Schelhaas