Abstract: The ampholytes are extracted from the reaction solution with a liquid cation exchanger which is immiscible with the acidic aqueous reaction solution, where the cation exchanger is dissolved in at least one organic solvent which is immiscible with water and forms an organic phase with the organic solvent. Subsequently the organic phase which is loaded with the ampholyte is separated from the reaction solution, and then the ampholytes are back-extracted from the organic phase with aqueous solvents. The product losses in the process are low, and the residual salt content is very low.

Abstract: Stable peroxycarboxylic acid granules, consisting essentially of (1) an imidoperoxycarboxylic acid or a salt thereof of the formula ##STR1## wherein A is a group of the formulae ##STR2## n is the number 0, 1 or 2, R.sup.1 is hydrogen, chlorine, bromine, C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.20 -alkenyl, aryl or alkylaryl,R.sup.2 is hydrogen, chlorine, bromine or a group of the formula --SO.sub.3 M, --CO.sub.2 M or --OSO.sub.3 M,M is hydrogen, an alkali metal or ammonium ion or one equivalent of an alkaline earth metal ion andX is C.sub.1 -C.sub.19 -alkylene or arylene, and(2) an inorganic sulfate and/or phosphate salt and/or a nonoxidizable surfactant as granulation auxiliary and a copolymer based on alkenylaminomethylenephosphonic acids as a film-forming coating substance.

Abstract: Alkenylaminomethylenephosphonic acids of the formula ##STR1## in which R.sub.1 is hydrogen, C.sub.4 -C.sub.10 -alkyl, phenyl, naphthyl, methylphenyl, hydroxyphenyl, methoxyphenyl, methylnaphthyl, hydroxynaphthyl or methoxynaphthyl,R.sub.2 is hydrogen,R.sub.3, R.sub.4, R.sub.5 are hydrogen or methyl,R.sub.5 is hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl, andM is hydrogen or a cation,and copolymers comprising 0.1-99.9% by weight, preferably 1-50% by weight, of one or more monomers of the formula I, in which R.sub.2 is hydrogen or a group of the formula--CH.sub.2 PO.sub.3 M.sub.2, and 99.9-0.1% by weight, preferably 99-50% by weight, of one or more monomers of the formula IIR.sub.1 'R.sub.2 'C.dbd.CR.sub.3 'X (II)in whichR.sub.1 ' is hydrogen or a group of the formula --COOM,R.sub.2 ' is hydrogen, phenyl or a group of the formula --COOM,R.sub.3 ' is hydrogen, methyl or a group of the formula --COOM or --CH.sub.2 COOM,X is a group of the formula --COOM orR.sub.2 ' and R.sub.3 ' together are a C.sub.

Abstract: A process for scavenging hydrogen sulfide from gases, in which the hydrogen sulfide-containing gas is introduced into an aqueous glyoxal solution of at least 15% by weight strength at a pH of a solution of 5 to 11 until the molar ratio of glyoxal to hydrogen sulfide is 3 to 2. The solid reaction product obtained in this way, which contains the hydrogen sulfide in bound form, is separated off. Owing to its stability and insolubility in acids and bases, it can be disposed of without problems.