Abstract: The present invention relates to a chelating agent precursor that contains glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) wherein at least one of the carboxylic acid groups is present as a carboxylic acid derivative selected from the group of amides, anhydrides, and esters, combinations thereof, and salts thereof, provided that it is not the triethyl ester of GLDA, the triethyl mono-t-butyl ester of GLDA, the tri-t-butyl ester of GLDA, the monobenzyl tri-t-butyl ester of GLDA, any ester or amide that contains azacycloalkane groups, any amide that contains biotin groups, any amide that contains minoethylcarbamoyl based amide groups, (S)-diethyl 2,2?-(1-benzyloxy)-1,5-dioxo-5-(prop-2-ynylamino)pentan-2-ylazanediyl-diacetate, diethyl 2,2?-(5-(3-azidopropylamino)-1-(benzyloxy)-1,5-dioxo-pentan-2-ylazanediyl-diacetate, the trimethyl ester of MGDA, the monomethyl ester dimethylamide of MGDA, the dibenzyl ester of MGDA, the dibenzyl mono t-butyl ester of MGDA, the di t-butyl est

Abstract: The present invention relates to new salts, complexes, crystals, solutions, dispersions, and slurries of threonine-N,N-diacetic acid or derivatives thereof, to formulations containing those, to processes to prepare those, and to the use thereof.

Abstract: The present invention relates to new salts, complexes, crystals, solutions, dispersions, and slurries of threonine-N,N-diacetic acid or derivatives thereof, to formulations containing those, to processes to prepare those, and to the use thereof.

Abstract: The present invention relates to glutamic acid N,N-diacetic amide, potassium or sodium glutamate N,N-diacetic amide, glutamic acid N-acetic amide N-acetonitrile, potassium or sodium glutamate N-acetic amide N-acetonitrile, to processes to prepare such compounds and the use thereof.

Abstract: The present invention relates to a chelating agent precursor that contains glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) wherein at least one of the carboxylic acid groups is present as a carboxylic acid derivative selected from the group of amides, anhydrides, and esters, combinations thereof, and salts thereof, provided that it is not the triethyl ester of GLDA, the triethyl mono-t-butyl ester of GLDA, the tri-t-butyl ester of GLDA, the monobenzyl tri-t-butyl ester of GLDA, any ester or amide that contains azacycloalkane groups, any amide that contains biotin groups, any amide that contains minoethylcarbamoyl based amide groups, (S)-diethyl 2,2?-(1-benzyloxy)-1,5-dioxo-5-(prop-2-ynylamino)pentan-2-ylazanediyl-diacetate, diethyl 2,2?-(5-(3-azidopropylamino)-1-(benzyloxy)-1,5-dioxo-pentan-2-ylazanediyl-diacetate, the trimethyl ester of MGDA, the monomethyl ester dimethylamide of MGDA, the dibenzyl ester of MGDA, the dibenzyl mono t-butyl ester of MGDA, the di t-butyl est

Abstract: The present invention relates to glutamic acid N,N-diacetic amide, potassium or sodium glutamate N,N-diacetic amide, glutamic acid N-acetic amide N-acetonithle, potassium or sodium glutamate N-acetic amide N-acetonitrile, to processes to prepare such compounds and the use thereof.

Abstract: The invention relates to a process for preparing betaines of formula (I) wherein R1 represents a C1-C24 hydrocarbon group, and R2 and R3 independently represent a C1-C3 hydrocarbon group, comprising reacting an aqueous solution of an ethoxylated quaternay ammonium compound of formula (II) wherein R1, R2, and R3 have the same meaning as described above and X− represents a suitable anion, with oxygen or an oxygen-containing gas under alkaline conditions in the presence of a supported and promoted Pt catalyst at a temperature ranging from room temperature to 70° C. Preferably, use is made of a Pt/Bi/C catalyst.

Abstract: A process is described for producing ester quats of the formula (I) ##STR1## where X.sup.- is an anion of an inorganic or organic acid, R.sub.a is a C.sub.1 to C.sub.4 alkyl group, R.sub.b and R.sub.c are each, independently of one another, a C.sub.1 to C.sub.3 alkylene group, and R.sub.d is a C.sub.1 to C.sub.22 fragment of a saturated and/or unsaturated aliphatic carboxylic acid, m, n, p, and q are integers, m has a value from 1 to 3, n a value from 0 to 3, p a value from 0 to 1, m+n+p=4, and q has the value 1 or, if m=3, n=0, and p=1, the value 2, in which process a quaternary compound of the formula (II) ##STR2## where X.sup.-, R.sub.a, R.sub.b, R.sub.c, m, n, p, and q have the above meanings, is esterified, in the presence of an oxo acid of phosphorus and/or one of its alkali or alkaline-earth salts as a catalyst, with a saturated and/or unsaturated C.sub.1 to C.sub.22 carboxylic acid, alone or in a mixture, while withdrawing water.

Abstract: The invention relates to a process for the preparation of optically active .alpha.-hydroxycarboxylic acids characterised in that carbamates are first reacted in the presence of a selective base and of a chelate-forming diamine to give a carbanion complex compound, this is then dia- or enantioselectively deprotonated, then substituted with CO.sub.2 and, as a final step, the heterocyclic protective group is eliminated.

Abstract: In a drill boom pivotally supporting a rock drilling apparatus, hydraulic parallel motion means is provided which includes a hydraulic pilot cylinder for sensing the setting of the elevation angle of the drill boom. During elevating of the drill boom the hydraulic pilot cylinder is furthermore used as an additional elevating cylinder.