Rutgerswerke Aktiengesellschaft

Verkaufsgesellschaft Fuer Teererzeugnisse (vft)

Arnold Alscher

Gerd Collin

Siegfried Peter

Herbert Beneke

Rudolf Oberkobusch

Eberhard Giebeler

Klaus Moraw

Jafar Omran

Wolfgang Jaumann

Heinrich Steinke

Bernhard Bluhm

Heinzpeter Nilles

Michael Pfeuffer

Gunter Storch

Gernot Loehnert

A process for the preparation of a liquifier for mineral binding agents comprising condensing a member of a group consisting of naphthalene sulfonic acid and alkyl naphthalene sulfonic acids with formaldehyde or a formaldehyde precursor in a highly acidic solution until a viscosity of 4,000 to 8,000 mPas is reached, adding water periodically to reduce the viscosity of the mixture until the condensation is complete and neutralizing the mixture to obtain a water-soluble condensation product and the liquifier produced thereby and mineral binding agents containing the same.

Liquifiers and their preparation

A method of removing salts from coal tar and coal pitches comprising washing coal tar or coal pitch in a pressure container with water and a carbon dioxide containing gas at a temperature and pressure near the critical point of the gas in the optional presence of at least one member of the group consisting of a solvent and an entraining agent, removing the liquid or dissolved tar or pitch to obtain tar or pitch with a low salt content and removing the aqueous phase whereby all the resins remain in the tar or pitch.

Novel method for extraction of salts from coal tar and pitches

A double hull ship for the transportation of liquid, high melting aromatic hydrocarbons, such as pitch heated to 200.degree. to 300.degree. C. The tanks are provided with good insulation and with means to introduce inert gas into the tank (1). Heat expansion is allowed for by means of companion expansion joints and sliding bearings (3). Because of the high solidification point of the products, all line systems must be provided with a companion heating system and adequate insulation. A thermal oil system, which simultaneously supplies the emergency heating system (4) of the tank (1), is suitable for this purpose. Separate ballast tanks (17) are installed between the hulls.

Ship for the liquid transportation of high melting aromatic hydrocarbons

A wood preserving impregnating oil with improved leaching, evaporation, and exudation characteristics comprised of:

Wood preserving impregnating oil and use thereof

A process is described for the modification of wood and wood products by heat treatment in a closed, heatable vessel, wherein the water content of the starting material is controlled to be no higher than 10% by weight.

Process for the modification of wood

A process for the transalkylation of nuclear methylated phenols into o-cresol in the liquid or gaseous phase is conducted in the absence of catalysts and in the presence of phenol.

Growing community of inventors

Essen, Germany

Arnold Alscher