Abstract:
The invention relates to the use of macroporous weakly-basic anion exchangers, charged with palladium or platinum and based on crosslinked polystyrene, as catalysts for the removal of oxygen from aqueous media by catalytic reduction, a process for the preparation of these catalyst resins, and new macroporous weakly-basic anion exchangers, charged with palladium or platinum and based on crosslinked polystyrene, in which the amino groups are primary or secondary amino groups.
Abstract:
A process for preparing 2,3-dichlorosulphonyl-acrylonitriles is disclosed by reaction of 3-sulphonyl-propionitriles of the formula R.sup.1 --SO.sub.2 --CH.sub.2 --CH.sub.2 --CN wherein R.sup.1 denotes optionally substituted aryl, aralkyl, alkyl or cycloalkyl with a chlorination agent in the presence of a basic catalyst at elevated temperature.
Abstract:
Compounds useful as antimicrobial and microbicidal compounds have the formula ##STR1## wherein R.sup.1 is optionally halogen-substituted lower alkyl or optionally substituted aryl,R.sup.2 is hydrogen andR.sup.3 is halogen, orR.sup.2 and R.sup.3 conjointly represent a bond,R.sup.4 is nitrile (--CN) or carboxylic acid amide (--CONH.sub.2) andHal is halogen.