GB283545A - Improvements in the recovery of valuable organic products from solid carbonaceous materials - Google Patents

Abstract

283,545. I. G. Farbenindustrie Akt.- Ges. Jan. 13, 1927, [Convention date]. Addition to 282,691. Mineral and tar oils, extracting.-Oils and other organic products are obtained from coal and other solid carbonaceous materials bv treatment at pressures of at least 75 atmospheres and at temperatures below the coking temperatures of the extracting agent, with such hydrocarbons or their derivatives as are liquid under the reactive conditions, amd contain substantially no components boiling below 100' C. or above 300‹ C. Catalysts and gases substantially free from hydrogen may be present. The treatment may be conducted in stages at different pressures, lower pressures than 75 atmospheres being used initially if desired. Pressures up to 1000 atmospheres are specified; temperatures of 300-400‹ C. are preferable. The oils may be worked up into Diesel oils, lubricating oils, insulating oils, and the like, or be used for the treatment of fresh coal; or they or the solid residue may be treated with hydrogen in presence or absence of catalysts and pressure to produce middle oils, benzine, and the like. Extracting agents specified are xylene, cresol, hydrogenated naphthalenes, aniline, alkaline substances decomposing coal, oils boiling above 180‹ C. obtained by the process, oils resulting from the distillation or low temperature carbonization of coal, lignite, or mineral oils, or from the destructive hydrogenation of coal, tars, mineral oils, &c., or from the catalytic hydrogenation of oxides of carbon under pressure. These oils may also be used mixed' with those boiling above 300‹ C. referred to in the parent Specification. In an example brown coal is triturated with xylene, and passed at 200 atmospheres pressure through a coil heated to 320-340‹ C.; the product is settled and centrifuged. Over 50 per cent of the coal is obtained as liquid oils.