Abstract: The invention is directed to a process for hte production of water insoluble peroxycarboxylic acids in which the carboxylic acid is suspended in the reaction mixture and reacted with hydrogen peroxide in the presence of pyridine-2,6-dicarboxylic acid.
Abstract: A process for the preparation of agglomerates containing diperoxydodecanedioic acid and a water-impermeable material, e.g. lauric acid, which process comprises the successive steps of agitating an aqueous suspension of the peroxy acid in the presence of the water-impermeable material and above the melting point thereof, cooling the suspension of the agglomerated particles thus obtained to a temperature at which the water-impermeable material turns solid, and isolating the resulting agglomerates. The agglomerates obtained are suitable for use as bleaching agent.
Type:
Grant
Filed:
November 10, 1988
Date of Patent:
April 24, 1990
Assignee:
Akzo N.V.
Inventors:
John Meijer, Reinder Torenbeek, Rolf H. van den Berg
Abstract: In order to safely prepare peracetic acid in an organic solvent, the bottom is maintained in a certain stationary state during the preparation of aqueous peracetic acid, whereupon the vapor current of peracetic acid, acetic acid and water is absorbed with an organic phosphate with 3-30 carbon atoms. The solution obtained in this manner can be transferred by means of desorption with a low-boiling compound, e.g. an alkyl ester, into this lower-boiling solvent.
Type:
Grant
Filed:
June 14, 1988
Date of Patent:
February 27, 1990
Assignee:
Degussa Aktiengesellschaft
Inventors:
Georg Boehme, Willi Hofen, Guenther Prescher, Rainer Siegmeier