Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Huels Aktiengesellschaft

Servo Delden B.v.

Kurt Kosswig

Alfred Coenen

Dieter Balzer

Ferdinand Von Praun

Bernhard Hentschel

Jurgen Ziebarth

Ekkehard Wienhoefer

Ferdinand V Praun

Ekkehard Wienhofer

Michael Brock

Hans Regner

Hermann Springmann

Meinolf Enneking

Hauke Steinhardt

Gunter Prominski

Harald Luders

Hans-Peter Schuller

The invention relates to quaternized triethanolamine difatty acid esters prepared from triethanolamine, fatty acid, fatty acid ester and a quaternizing agent and to a process for their preparation and to their use. The quaternized triethanolamine difatty acid esters thus prepared can be used to produce particularly storage-, temperature- and viscosity-stable rinse cycle laundry softeners having a high active content.

Quaternized triethanolamine difatty acid esters

Aqueous emulsions which contain the fatty acid esters of N-methyl-N,N,N-trihydroxyethyl ammonium methyl sulfate as cationic tensides are suitable as fabric softeners. These fabric softener emulsions have the disadvantage, however, that emulsions with high concentrations can be handled only by means of dispersion agents. Therefore, an aqueous emulsion of fatty acid ester of N-methyl-N,N,N-trihydroxyethyl ammonium methyl sulfate is proposed which is stable in storage, and demonstrates an active substance content of more than 15% at a viscosity below 100 mPa.s at 25.degree. C. This emulsion can be used without any additional emulsifier. The emulsion according to the invention has quaternary ammonium compounds with 1.1 to 1.7 fatty acid groups, as a mean value.

Aqueous emulsions containing fatty acid esters of

A process for the production of carboxymethylates comprises reacting alcohols, ether alcohols, or alkyl phenols with an aqueous solution of at most a stoichiometric amount of free chloroacetic acid and twice the stoichiometric amount of an aqueous base. The chloroacetic acid and base are added separately, but simultaneously under agitation (at elevated temperature and under reduced pressure) to the alcohol or alkyl phenol. The water content in the reaction mixture, during the entire reaction, is maintained at 0.3-1.5% by weight. Increased selectivity results and it now becomes possible to use aqueous chloroacetic acid in this process.

Process for the production of carboxymethylated alchols, ether alcohols,

A process for the recovery of extensively emulsion-free oil from a subterranean reservoir of medium or high salinity comprises forcing into an injection well a 0.1-20% (e.g., 1-20%) by weight solution or dispersion in formation water of carboxymethylated ethoxylates of the formula

Process for oil recovery from a subterranean reservoir

A process for recovering extensively emulsion-free oil from a subterranean deposit of medium or high salinity comprises forcing into an injection well a 1-20% strength solution or dispersion in formation water of a carboxymethylated ethoxylate tenside of the formula:

Process for extracting oil from a subterranean reservoir

Extensively emulsion-free oil is recovered from a subterranean reservoir of medium or high salinity by forcing an emulsion, e.g., of oil, into an injection well. Carboxymethylated ethoxylate is utilized as the emulsifier and is selected so that the phase inversion temperature of the system:oil of reservoir/formation water/tenside/optional additives lies 0.degree.-10.degree. C. above the reservoir temperature.

Process for oil recovery from subterranean deposits by emulsion flooding

A process for preparing sodium bicarbonate and hydrogen chloride by reacting an aqueous sodium chloride solution with carbon dioxide under pressure in the presence of an amine and of an organic solvent.

Method for preparing sodium bicarbonate and hydrogen chloride

A process for producing sodium bicarbonate and hydrogen chloride by reacting an aqueous sodium chloride solution with carbon dioxide in the presence of an amine and an organic solvent. The steps of the process are carried out, wherein:

Process for preparing sodium bicarbonate and hydrogen chloride

According to the present invention, ammonia and hydrogen chloride are prepared from ammonium chloride. The steps of the process include:

Method for preparing ammonia and hydrogen chloride from ammonium chloride

A compound of the formula ##STR1## wherein R is alkyl of 8-22 carbon atoms in the alkyl chain or hydroxyalkyl of 2-22 carbon atoms; and R' and R' each independently is hydrogen or C.sub.1 -C.sub.20 -alkyl provided that R' and R' are not simultaneously hydrogen, and R' and R' in total have 8-20 carbon atoms; and

Adducts of alcohols and olefin oxides as biodegradable and low-foaming

Compounds of the following formula are suitable for reducing the interfacial surface tension of oily phases with respect to water: ##STR1## wherein z is 1 or 2,

Adducts of alcohols and olefin oxides, suitable for reducing the

An improvement in the process for obtaining gaseous hydrogen chloride by extracting dilute aqueous hydrochloric acid with amines wherein:

Method for obtaining gaseous hydrogen chloride from dilute aqueous

A method of purifying tertiary amines by removing sec. and prim. amines and/or their hydrochlorides produced in the manufacture of the tertiary amines. The impurities are removed by dissolving the impure tertiary amines in an organic solvent and the resulting solution is passed over absorbents such as aluminum oxides having a specific surface area of about 100 to 400 square meters per gram. The sec. and prim. amines and/or their hydrochlorides are retained on the adsorbents and pure tertiary amines are useful in the solvents or can be separated therefrom. The adsorbents are regenerated by passing polar solvents thereover to remove the sec. and prim. amines and/or their hydrochlorides.

Purification of tertiary amines using an adsorbent

A method of separating HBr from a mixture of HBr/HCl using the difference in the stability to heat of the amine hydrohalides thereof. A mixture of HBr/HCl is treated with a solution of an amine and the HCl is split off, by the action of heat, from the amine hydrochlorides in the resulting mixture of amine hydrochlorides and amine hydrobromides, and the HBr is then recovered from the residual amine hydrobromides with the aid of a base and optionally recovered.

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Marl, Germany

Kurt Kosswig