Abstract:
Process for the electrochemical condensation of carboxylic acids in a solvent, in which the electrolyte is caused to flow at a rate of from 0.05 to 2 m/sec between pairs of electrodes which are impermeable to liquids and are spaced from 0.1 to 2 mm apart.
Abstract:
A process for the production of cycloalkanone oximes by reaction of cycloalkanones with hydroxylammonium salts or mixtures thereof with ammonium salts and acids in aqueous solution. The free and combined acid is removed from the mixtures by electrodialysis before, during or after the oximation. The reaction of the cycloalkanone to the oxime is preferably carried out in the cathode chamber of an electrodialysis cell. Complete oximation of the cycloalkanone is achieved.
Abstract:
In an electrocoating process acid binders which are present at least partly in the form of their salts with basic compounds are used and the basic compounds used for salt formation consist of the extent of 0.1 to 50 percent of the neutralization equivalent of the acid binder of at least one arylamine and/or alkynylamine and/or quaternary ammonium hydroxide and/or phosphonium hydroxide with at least one aromatic ligand, and other conventional additives and non-basic corrosion inhibitors may be contained in the aqueous solution or dispersion of the coating composition. The process is suitable for the production of particularly corrosion-resistant coatings on metal articles.
Abstract:
PROCESS FOR THE PRODUCTION OF SEBACIC ACID DIESTERS FROM ADIPIC ACID MONOESTERS OF HIGHER ALCOHOLS BY ELECTROCHEMICAL CONDENSATION IN METHANOLIC SOLUTION USING CONTINUOUS OR INTERMITTENT FLOW OF CURRENT, IN WHICH A SATURATED MONOOR POLYVALENT ETHER OR A LOWER ALKANOIC ACID IS ADDED TO THE REACTION MIXTURE.
Abstract:
Bipolar electrodes having two chambers for inflow and outflow of the reaction mixture to be electrolyzed. The chambers are separated from each other by a distance which is considerably larger than their width and the inlets and outlets are on the same side of the electrode. Electrodes of this kind are suitable, for example, for the Kolbe synthesis of dicarboxylic esters from dicarboxylic half-esters. Such esters are useful as plasticizers.