Basf Aktiengesellschaft

Basf Se Corporation

Werner Bochnitschek

Alfred Oftring

Richard Baur

Wolfgang Trieselt

Charalampos Gousetis

Rolf Fikentscher

Peter Neumann

Wolfgang Reuther

Johannes Perner

Georg Heinrich Grosch

Thomas Wettling

Arend Jouke Kingma

Wolfgang Habermann

Ekhard Winkler

Gerold Braun

Volker Seidl

Martin Karches

Theo Proll

Stefan Birnbach

Peter Hammes

Hans-Ulrich Jaeger

Andreas Hohmann

Felix Richter

Dieter Stuetzer

Franz Weber

Ulrich Kaluza

Uwe Rachwalsky

Walter Weisbrodt

Marco-Christian Volland

Carolin Nadine Duecker

Alexandra Wiedemann

Johann Fritzmann

The present invention relates to a process for preparing polyisobutene by polymerizing isobutene using an inert diluent and a halogen-containing Lewis acid as a catalyst, wherein the isobutene in the form of droplets is contacted with the Lewis acid in a polymerization apparatus.

Method for producing polyisobutene

Glyceric acid compounds of the formula (I)RRC(OH)&#x2014;CR(OH)&#x2014;COOX&#x2003;&#x2003;(I)where R, Rand Rare independently hydrogen, C-alkyl, C-aryl, C-alkaryl or C-aralkyl andX is hydrogen, an alkali metal, an alkaline earth metal/2 or NH,are prepared by saponification of glycidic acid compounds of the formula (II)where Y is NHor ORin which Ris C-alkyl or C-aralkyl,with ring-opening addition of water onto the epoxide ring. Preferably, Y is NHand the glycidamide of the formula (II) which is used is prepared by reacting acrylonitriles of the formula (III)RRC&#x2550;CRCN&#x2003;&#x2003;(III)with hydrogen peroxide.

Method for the production of glyceric acid

Alkali metal sulfates are electrolyzed to more concentrated solutions of alkali metal hydroxide and sulfuric acid by using a three-compartment electrodialysis cell at temperatures of .gtoreq.70.degree. to .gtoreq.150.degree. C. and current densities of from 0.5 to 15 kA/m.sup.2 using an anion exchange membrane whose polymeric ion exchange matrix comprises a styrene/divinylbenzene copolymer containing very strongly basic quaternary ammonium groups and a hydronium ion blocker, on whose central compartment side is an ion exchange layer or membrane containing tertiary or secondary amino groups.

Electrolysis of alkali metal sulfates

A process is described for the preparation of an N-alkyl- or N,N-dialkyl-1,2-diaminoethane of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 is C.sub.1 - to C.sub.5 -alkyl, and R.sup.3 is hydrogen or C.sub.1 - to C.sub.5 -alkyl, with the proviso that the total number of carbon atoms in R.sup.2 and R.sup.3 is an integer from 1 to 6, by reacting an imine of the general formula II ##STR2## with an amine of the general formula III ##STR3## where R.sup.1, R.sup.2 and R.sup.3 are as defined above, which comprises carrying out the reaction in the presence of carbon dioxide at from 10.degree. to 150.degree. C. and at from 0.5 to 50 bar.

Preparation of N-alkyl- and N,N-dialkyldiaminoethanes

.beta.-Alaninediacetic acid (Ia) or its alkali metal or ammonium salts (Ib) are prepared by a process in which iminodiacetic acid and acrylic acid

Preparation of .beta.-alaninediacetic acid or its alkali metal or

Washing and cleaning agents for aqueous use contain from 2 to 25% by weight, based on the total weight of the agent, of .beta.-alanine-N,N-diacetic acid or an alkali metal or ammonium salt thereof as water softener. The washing and cleaning agent is effective in preventing hardness deposits on textiles and fabrics.

Washing and cleaning agents containing .beta.-alanine-N,N-diacetic acid

Pulverulent or water-free liquid detergents each essentially contain surfactants, builders, bleaching agents and effective amounts of compounds of the formula ##STR1## where R.sup.1 is for example C.sub.1 -C.sub.8 -alkyl, substituted or unsubstituted alkyl or C.sub.3 -C.sub.8 -alkenyl, and R.sup.2 and R.sup.3 are each for example H or C.sub.1 -C.sub.16 -alkyl, as bleach activators for peroxides.

Detergents that contain acyl derivatives of dihydroxydioxane as bleach

2-Hydroxy-3-aminopropionic-N,N-diacetic acid and derivatives thereof are used in particular as complexing agents, bleaching agent stabilizers and builders in detergents.

2-Hydroxy-3-aminopropionic-n,n-diacetic acid and derivatives thereof,

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Ludwigshafen, Germany

Werner Bochnitschek