Henkel Kommanditgesellschaft Auf Aktien

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Volker Wehle

Jurgen Reiffert

Brigitte Spei

Gabriele Rogall

Herbert Fischer

Uwe Ploog

Ludwig Schieferstein

Josef Penninger

Jens Conrad

Wolfgang Rupilius

Andreas Syldatk

Rainer Jeschke

Hermann Kroke

Werner Gerhardt

Water-in-oil emulsions

A process for demulsifying oil/water emulsions using an organic demulsifier which is added in the optimum amount by means of a controlling device for the metered addition, wherein the demulsification reaction is carried out at a temperature of from 60.degree. C. to 90.degree. C. with mixing.

Process for the demulsification of oil/water emulsions using organic

Dicarboxylic acid mono-(2-hydroxydodecyl)-esters corresponding to the following general formula ##STR1## and salts thereof corresponding to the following general formula ##STR2## wherein A represents the radicals ##STR3## and M represents an alkali metal or ammonium, the use of these compounds as corrosion inhibitors in aqueous systems either by themselves or in combination with one or more complexing agents in concentrations of from 1 to 100 ppm, optionally in the presence of other scale inhibitors, dispersants, non-ferrous metal inhibitors, and/or microbicides.

Dicarboxylic acid mono-(2-hydroxydodecyl)-esters, their salts and their

Process for controlling the breaking of an oil-in-water emulsion using an organic emulsion breaker comprising the steps of:

Process for controlling the breaking of oil-in water emulsions

Aqueous media having a dissolved content of a small amount, (less than 100 p.p.m.) of a mixture of aminoalkanols of the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent H and C.sub.1-18 unbranched alkyl substituents (the sum of the carbon atoms in R.sub.1 and R.sub.2 being 9 to 18), R.sub.3 and R.sub.4 each represent H,C.sub.1-4 alkyl and C.sub.2-4 hydroxyalkyl substituents, x represents 2 to 6, and y represents 0 to 1, the ##STR2## units in the aminoalkanols being of at least two different chain lengths in the range of 11 to 20 carbon atoms, possess decreased tendency to corrode iron-containing metals including steel. The mixtures are also useful in salt form. The efficiency of the mixture is improved by various additives which act synergistically therewith.

Aqueous media of decreased corrosiveness for iron-containing metals

A method for inhibiting corrosion of nonferrous metals in contact with circulating water comprising the steps of adding to circulating water in contact with non-ferrrous metals from 0.05 to 10 gm/m.sup.3 of at least one 3-amino-5-alkyl-1,2,4-triazole wherein said alkyl has from 2 to 8 carbon atoms and adjusting said water to a pH of from 6 to 10; as well as corrosion inhibiting compositions containing said 3-amino-5-alkyl-1,2,4-triazole.

Method and composition for inhibiting corrosion of nonferrous metals in

A method for inhibiting corrosion of non-noble metals in contact with circulating water comprising the steps of adding to circulating water in contact with non-noble metals from 0.5 to 50 gm/m.sup.3 of at least one cyclohexanehexacarboxylic acid and adjusting said water to a pH of from 6 to 9; as well as corrosion inhibitory compositions containing cyclohexanehexacarboxylic acid.

Growing community of inventors

Haan, Germany

Volker Wehle