Basf Aktiengesellschaft

Basf Se Corporation

Friedrich Wirsing

Gerold Braun

Alfred Oftring

Armin Stamm

Manfred Patsch

Kai-Uwe Baldenius

Thomas Greindl

Klaus Pandl

Claus Marschner

Peter H&ouml;ssel

Knut Oppenl&auml;nder

Matthias Dust

Michael Zirnstein

Wolfgang Kasel

Georg Krug

Uwe Nahr

Joerg L Jessen

Walter Schunter

Provided is a method for the production of aminodicarboxylic acid N,N-diacetic acids of formula (I), wherein X is independently hydrogen or an alkali metal and n is 1 or 2. Aminodicarboxylic acid-N,N-diacetic acids of high purity can be yielded. The method involves: a) reacting an aminodicarboxylic acid, with 0.8 to 1.2 mole equivalents of formaldehyde and with 0.8 to 1.2 mole equivalents of hydrocyanic acid; b) reacting the reaction products of a) with 0.8 to 1.2 mole equivalents of hydrocyanic acid and with 0.8 to 1.2 mole equivalents of formaldehyde; c) hydrolyzing in the reaction product obtained in b).

Method for the production of aminodicarboxylic acid-N,N-diacetic acids

The invention relates to a process for preparing low-by-product, light-color methylglycine-N,N-diacetic acid tri(alkali metal) salt by alkaline hydrolysis of methylglycinediacetonitrile (MGDN), comprising the steps in the sequence (a) to (f):

Method for producing methylglycine-N,N-diethanoic acid-trialkali metal salts with a low by-product content

The invention relates to a continuous process, carried out in two steps, for the cyanoalkylation of compounds having one or more NH functions by reaction thereof with carbonyl compounds and hydrocyanic acid, in which the first step is carried out without pressure at a temperature which is below the boiling point of the reaction mixture.

Continuous process for the cyanoalkylation of compounds having one or more NH functions

Aqueous cationic tenside preparations, method for the production and use thereof

Double attachment reactive dyes have the formula ##STR1## where U.sup.1 is C.sub.1 -C.sub.4 -alkyl, phenyl, C.sub.2 -C.sub.10 -alkenyl or the radical ##STR2## where Q.sup.1 and Q.sup.2 are each independently of the other hydrogen or C.sub.1 -C.sub.4 -alkyl and Q.sup.3 is a group which is detachable under alkaline reaction conditions,

Double attachment reactive dyes having alkyl- or alkenylsulfonyl and

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Kaiserslautern, Germany

Friedrich Wirsing