Rutgerswerke Aktiengesellschaft

Karl-Heinz Koch

Rolf Marrett

Herbert Glaser

Manfred Meinbreckse

Jafar Omran

Disclosed is a continuous or discontinuous process for coking high-boiling aromatic hydrocarbons to form high grade carbon products having only a narrow range of variation of physical and chemical properties. High-boiling aromatic hydrocarbon mixtures are coked in thin layers according to a defined temperature/time program, and the functional relationship between layer thickness and optimum coking time, which applies to that program for the particular hydrocarbon mixture used, is determined by means of a simple preliminary experiment. A small quantity of the hydrocarbon mixture used is coked on a microscope hot stage under standardized conditions to determine the minimum coking temperature, the time to the final coking temperature and the dependence of coking time on the layer thickness.

Process for coking high-boiling aromatic hydrocarbon mixtures to form

An improvement in the method for the production of a highly aromatic pitch-like coal by-product by dissolving comminuted coal or similar solid carbon-containing raw materials with aromatic solvents at elevated temperature is disclosed wherein the solid materials are dissolved at atmospheric pressure in aromatic compound mixtures of coal origin with an average boiling point above 350.degree. C. and recycling of the condensable fractions of the reaction gas. If the occasion arises, further aromatic solvents may be added to the suspension.

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Castrop-Rauxel, Germany

Karl-Heinz Koch