Uhde Gmbh

Gerhard Hohne

Adrian Brandl

Friedrich Honolke

Eduard Schibilla

A method for producing a pumpable suspension in oil of dehydrated, finely-ground lignite is disclosed. The method involves mixing hydrous, ground lignite with an oil and gasoline, grinding the lignite in the mixer so that substantially all the particles are finer than 2 mm, heating and pressurizing this suspension which results to a temperature in the range of 190.degree. to 240.degree. C. and a pressure in the range of 30 to 80 bar and maintaining the suspension at temperature and pressure conditions within the indicated ranges for at least five minutes, separating the suspension into a slurry of partially dehydrated lignite and oil and a liquid composed principally of water, gasoline and oil, separating water from the foregoing liquid and mixing the oil and gasoline which remain with the slurry of partially dehydrated lignite and oil to produce a suspension of partially dehydrated lignite, reducing the pressure of the suspension of partially dehydrated lignite to one in the range of 1 to 18 bar while maintaining the temperature thereof at one in the range of 190.degree. to 240.degree. C. and separating water and the diluent from the foregoing suspension, leaving a dehydrated lignite suspension in oil.

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Dortmund, Germany

Gerhard Hohne