Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Degussa Aktiengesellschaft

Leybold-heraeus Gmbh

Manfred Langer

Helmut Knorre

Wolfgang Fischer

Gerhard Pohl

Peter Leidl

Willi Fischer

Gert Roessler

Friedrich Fauser

Axel Waniorek

The reaction mixture obtained in the production of 2,3-epoxypropyltrialkylammonium chlorides by treatment of chlorohydroxypropyltrialkylammonium chlorides with alkaline acting materials in aqueous medium containing impurities which create problems in the subsequent use of the 2,3-epoxypropyltrialkylammonium chloride. According to the invention the reaction mixture is freed from these impurities by separating it from undissolved impurities by employing at least about 0.2 mole of 2,3-epoxypropyltrialkylammonium chloride per mole of water.

Production of 2, 3-epoxypropyl trialkyl ammonium chlorides

The object of the invention is a process for recycling used lubricating oils. After drying and gasoline removal, the oil is distilled and then treated with sodium or sodium hydride in a finely-divided state at elevated temperature. This is followed by a further distillation. Both distillations are at temperatures below 300.degree. C., the oil fractions of low volatility being respectively distilled in a molecular distillation apparatus at below 2 mbar.

Process for recycling of used lubricating oils

The known process for the production of cationic starch ethers by the reaction of starch with cationic etherifying agents in the presence of water in an alkaline medium is improved by reacting the starch at a temperature of about 50.degree. to 120.degree. C. with an alkylidene epoxide which has a tertiary amino group or quaternary ammonium group in a medium which contains about 10 to 35 weight percent water and about 0.2 to 2.0 weight percent calcium hydroxide or calcium oxide. There are produced in short reaction times yields not previously attainable.

Process for the production of cationic starch ethers

A method for reprocessing used lubricating oils is disclosed wherein the oil is dried, treated with finely dispersed sodium metal at elevated temperature, the remaining free or organically bound metal is decomposed by means of an active hydrogen containing compounds, followed by distillation of the oil for recovery.

Procedure for the reprocessing of used lubricating oils

A process for the reprocessing of used lubricating oil wherein said oils are treated with a mixture of potassium hydroxide and sodium hydroxide.

Process for the reprocessing of used lubricating oils (II)

A formaldehyde resin solution compatible fire retardant agent solution compatible with formaldehyde resin solutions is prepared consisting essentially of

Flame retardant agent solution of phosphoric acid containing condensate

There is described a process for the production of inert solvent soluble metal alcoholate free from alcohol of crystallization by reacting an alkali metal with an alcohol in an inert solvent above its melting point in an emulsion of the alkali metal in a solvent.

Process for the production of crystalline alcohol free alkali metal

Gypsum plaster having a delayed setting time is made by adding a mixture of mesotartaric acid and l-tartaric acid or d,l-tartaric acid or a mixture of l-tartaric acid and d,l-tartaric acid to the gypsum plaster.

Setting retarder

Industrial gypsum plaster (plaster of Paris) having a delayed setting time is prepared by including D,L-tartaric acid and sufficient calcium hydroxide that a 5 weight % aqueous suspension of the plaster has a pH of at least 11.5.

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Karlstein, Germany

Manfred Langer