Henkel Kommanditgesellschaft Auf Aktien

Klaus Herrmann

Alfred Meffert

Klaus Friedrich

Karl Heinz Schmid

Michael Langen

Rainer Hoefer

Hans-Christian Raths

Karl-Heinz Schmid

Adolf Asbeck

Wolfgang Breuer

Fritz Lange

Rudolf Zauns-Huber

Fredi Wolter

Wolfgang Prinz

Leonhard Wittich

Degreasing process

Use of hydrophobized hydrotalcites as catalysts for ethoxylation or

A process for the production of alkyl polyoxyethylenes showing improved low-temperature behavior, by reaction of alcohols with ethylene oxide at elevated temperature in the presence of basic alkali metal compounds as catalysts and subsequent neutralization of the alkaline catalyst with acids, which under prior art practice was impractical because of clogging of reaction vessels and equipment associated with precipitation of salts during neutralization, is made practical by adding a finely divided solid to serve as a precipitation control agent during neutralization. The finely divided solids used are, in particular, organic and/or inorganic materials known in the prior art as filter aids, such as kieselguhr and sawdust or other finely divided cellulose.

Process for making polyoxyethylene surfactants with desirable low

A process for the production of alcohol polyglycol ethers by reaction of an alcohol with ethylene oxide and/or propylene oxide wherein a basic alkali metal compound catalyst is employed in at least 0.5% by weight, expressed as sodium methylate, and based on the total weight of the reactants. The reaction mixture is neutralized in the presence of a filter aid.

Alcohol ethoxylates of reduced EO content or residual PO content

Fatty acid esters of polyglycerol polyglycol ethers obtained by reaction of polyglycerols in known manner with ethylene oxide and propylene oxide and esterification of the alkylene oxide adduct obtained with fatty acids, containing from 2 to 15 moles ethylene oxide, from 10 to 60 moles propylene oxide and from 1 to 3 moles fatty acid being used per mole of hydroxyl groups in the polyglycerol, are effective as foam inhibitors.

Fatty acid esters of polyglycerol polyglycol ethers, their production

Block polymers usable as defoamers have the following formula ##STR1## in which R represents a glycerol or polyglycerol function having a degree of polymerization x of from 1 to 6 and the indices y is equal to (x-z+2), z is equal to (x-y+2), a is equal to 1 to 15, b is equal to 50 to 200 c is equal to 1 to 15, d is equal to 20 to 150 and e is equal to 1 to 15, with the proviso that the sums (a+c+e) is equal to 2 to 20, (b+d) is equal to 50 to 250 and (c+e) is equal to 1 to 15, and y has a value of at least 1. The block polymers are prepared by reaction of glycerol or polyglycerol having a degree of polymerization x with ethylene oxide, then with propylene oxide and, finally, again with ethylene oxide, preferably in the presence of alkaline etherification catalysts.

Alkylene oxide block polymers usable as defoamers

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Monheim, Germany

Klaus Herrmann