Henkel Kommanditgesellschaft Auf Aktien

Henkel Kgaa

Henkel Kommanditgesellschaft

Christian Rossmann

Helga Burger

Karl Heinz Schmid

Robert Piorr

Horst Baumann

Jurgen Geke

Rolf Scharf

Hans-Joachim Schlussler

Werner Ludecke

Hans-Gunther Germscheid

Winfried Wichelhaus

Friedbert Zetzsche

Gerald Schreiber

Dieter Meyer

Wolfgang Riedel

Horst Fluchter

Horst Fluechter

This invention is directed to a process for cleaning solid surfaces with aqueous alkaline cleaning compositions comprising (a) stongly alkaline active-substance concentrates and (b) acidic or neutral active-substance concentrates comprising silica dispersions. Component (a) is present in an excess over component (b) sufficient to cause an alkaline medium.

Silica-containing alkaline dispersions and their use in cleaning solid

The invention relates to alkaline cleaners containing two components A and B, component A being a strongly alkaline solution comprising mostly alkali metal hydroxides and employed in an excess, component B being a concentrate comprising an aqueous silicic acid dispersion containing anionic, nonionic or amphoteric tensides, builder substances, stabilizers and optionally inorganic mineral acids, complexing agents and/or preservatives. Component B contains, as an active ingredient, adjusted to a pH in the range of from 1 to 11, a silicic acid dispersion obtained in situ by treating an alkali metal silicate solution with a mineral acid or a gas reacting acidically in aqueous solution. The dispersions also contain stabilizers, tensides and builder substances. If desired, additional agents conventionally contained in cleaning concentrates may also be added. The invention also relates to processes for preparing such cleaners by treating an alkali metal silicate solution with a mineral acid or a gas reacting acidically in aqueous solution and adding tensides, stabilizers and builder substances thereto.

Two-component alkaline cleaning compositions and methods of preparing

Foam-inhibiting compositions for use in an aqueous solution containing polyethylene glycol ethers corresponding to the following formula

Aqueous foam-inhibiting compositions containing alkyl polyethylene

A method for improving the separating action in the ultrafiltration of aqueous solutions containing high-molecular-weight organic compounds including water-soluble anionic and/or non-ionic surface-active compounds consisting essentially of subjecting an aqueous solution containing high-molecular-weight organic compounds including water-soluble anionic and/or non-ionic surface-active compounds to an ultrafiltration through a porous membrane in the presence of olefinically-unsaturated C.sub.16-22 fatty acids or water-soluble salts thereof, in a weight ratio of surface-active compound to fatty acid or salt of from 20:1 to 1:1 and recovering said aqueous solution substantially separated from said high-molecular-weight organic compounds. The retention power for water-soluble tensides can be 0.9 or more with this measure (without the addition, .ltoreq.0.1 to 0.5). Furthermore oil can be removed to a mineral oil content of 20 mg/l, whereas without the addition of the invention, values of more than 100 mg/l in the permeate are obtained.

Method for improving the separating action in the ultrafiltration of

Polyethylene glycol ethers of the type obtained by the addition of from 4 to 20 parts by weight of ethylene oxide onto 1 part by weight of polyglycerol having a hydroxyl number in the range from 900 to 1200 and subsequent etherification of the free hydroxyl groups with linear or branched alkyl halides containing from 4 to 8 carbon atoms, and their use as foam-inhibiting additives for low-foam cleaning agents.

Polyglycol ethers as foam-inhibiting additives in low-foam cleaning

This invention is directed to a process for cleaning solid surfaces with aqueous alkaline cleaning compositions comprising (a) strongly alkaline active-substance concentrates and (b) acidic active-substance concentrates comprising dispersions of boric acid or alkali metal borates in orthophosphoric acid. Component (a) is present in an excess over component (b) sufficient to cause an alkaline medium.

Cleaning compositions containing boric acid or an alkali metal borate in

The invention relates to the use of 2,4,7,9-tetramethyl-5-decyne-4,7-diol for breaking oil-in-water emulsions and in regenerating used cleaning compositions by making it possible to remove emulsified oils therefrom.

Breaking oil-in-water emulsions

Process for regenerating alkaline and neutral silicate-free and phosphate-free cleaning solutions that are contaminated with emulsified mineral or natural oils by (a) adding thereto an alkali metal phosphate and/or an alkali metal silicate, and then (b) adding a soluble calcium and/or magnesium salt to the resulting solution.

Regeneration of aqueous degreasing and cleaning solutions

Process for regenerating alkaline and neutral phosphate and/or silicate-containing degreasing and cleaning solutions which are contaminated with emulsified mineral and/or natural oils, by treating such contaminated solutions with a controlled quantity of either calcium ions, magnesium ions, or a mixture thereof.

Growing community of inventors

Langenfeld, Germany

Christian Rossmann