GB282691A - Improvements in the recovery of valuable organic products from solid carbonaceous materials - Google Patents

Abstract

282,691. I. G. Farbenindustrie Akt.- Ges. Dec. 21, 1926, [Convention date]. Mineral and tar oils, extracting. - Liquid or liquefiable products are obtained in a continuous process from solid carbonaceous materials such as coal, brown coal, residues of coal from which bitumen has been extracted, bituminous shales, peat, wood, &c. by heating them under pressures of 30-1000 atmospheres with high-boiling hydrocarbons or their derivatives containing no constituent which boils below 300‹ C.. such as anthracene oil, mineral or tar oils or their distillation products, or products obtained by cracking, destructive hydrogenation, &c. or synthetic high-boiling products obtained from hydrogen and oxides of carbon, or products from the process. Pressures down to 10 atmospheres may be employed if the products are to be cracked or subjected to destructive hydrogenation. The treatment may be carried out in presence of gases containing nitrogen, carbon dioxide or carbon monoxide, but substantially no hydrogen, and of catalytic substances such as sulphides of alkali or alkaline earth metals, or other substances having an alkaline reaction. Substances having a distributive or thermo-conductive action may be added. Temperatures above 250‹ C. but not exceeding the coking temperature of the added oil are used. The process may be carried out by passing the mixture through a heated coil or a vessel provided with stirrers, or the oil may be passed through vessels containing the solid substances. The product is separated by centrifuging, low temperature distillation, extraction, or other means. The residual coal is easily ignited, readily absorbs gases, and may be transformed into liquid products by treatment with hydrogen under pressure. The liquid products are worked up to form lubricating oils, Diesel or other fuel oil, &c. Specifications 9730/15, 131,588, 160,467, and 192,850 are referred to.