DE676271C - Process for the production of liquid hydrocarbons from solid carbonaceous substances - Google Patents

Description

Process for the production of liquid hydrocarbons from solids carbonaceous substances It is already known that solid carbonaceous substances, -like coal, peat or wood, in the crushed state with a catalytically active Soak the substance in dissolved form and then subject it to pressure hydrogenation. But it has been shown that different types of coal, z. B. coal, itself in a finely ground state, poor absorption capacity for catalytic substances, in particular; from aqueous solution. Occasionally take, even coarse-grained ones Coals such as B. lignite, the catalyst only on its surface. To one high degree of liquefaction of the carbonaceous starting material during pressure hydrogenation To achieve, however, it is desirable that the catalytic substance is the grain of the grain penetrates as completely and evenly as possible.

It has now been found that these disadvantages are eliminated when the solid carbonaceous raw material impregnated with a catalytic substance is, the m a low molecular weight acid of the fatty acid series or its anhydride is fully or partially resolved.

Compounds, for example, are used as the catalytic substance of metals from a. to group B., advantageously from those of the 5th and 6th group, and compounds of cobalt, iron, tin and lead as well as metalloids such as chlorine, bromine, Antimony, selenium or others, and their compounds. Under the metal connections are the halides, oxides, sulfide salts, rhodanides, phosph, or compounds and sulfides advantageous.

As a solvent for the catalytically active substance, for. B. Formic acid, acetic acid, e.g. B. as glacial acetic acid, acetoacetic acid, acetic anhydride as well as amino acids such as glycocolla.

The starting material is z. B. in finely chopped or finely ground State with the solution of the catalyst at ordinary or elevated temperature sprinkled or soaked and the solvent is optionally distilled off again.

Sometimes it is advantageous to use the ingredients in the starting material, e.g. B. in coal, to remove any or all of the alkaline substances present in the ash or with an acidic substance, e.g. B. acids to neutralize.

The starting material pretreated in this way is then appropriately made into a paste with high-boiling oil and thus subjected to pressure hydrogenation. The present procedure enables the catalytically active substance in the most intimate way Mixing with the solid charcoal to use raw material containing so ' see the yields of liquid products are tall and their condition is not very good '' EXAMPLE Finely ground Ruhr coal, the basic components of which have been neutralized with dilute sulfuric acid, is sprinkled with glacial acetic acid in which molybdic acid chloride (obtained by passing hydrogen chloride gas over slightly heated molybdic acid) is dissolved in such a way that 0.02% molybdic acid is absorbed by the coal. The coal and the evaporating glacial acetic acid are then recovered by condensation. The coal pretreated in this way is then made into a paste with a heavy oil from the same coal in the ratio i: i and treated together with hydrogen under a pressure of 200 at a temperature of 47o °. 92.2% of the carbon in coal is mainly Lich liquid products transferred, the 4, i 4 asphalt included. #; -, If, on the other hand, the coal is `, r, #en solution of ammonium molybdate so narrows that o, o2% molybdic acid to the `OK, 0 items are omitted, and under the same When subjected to pressure hydrogenation conditions, only 87.5% of the carbon in the coal is converted into mainly liquid fractions, and these contain 50, o asphalt.

Claims (1)

PATENT CLAIM: Process for the production of liquid hydrocarbons made of solid carbonaceous substances in crushed and advantageously pasted Condition caused by treatment with hydrogen under pressure at an elevated temperature, whereby the starting material with a catalytically active substance in an organic Solvent is completely moderately partially dissolved, is soaked, characterized in that that one uses low molecular weight acids of the fatty acid series or their anhydrides as solvents used.