Maintenance of solvent balance in coal liquefaction process

Manufacture of coke

Manufacture of coke from a coal extract

Manufacture of hydrocarbon oils by hydrocracking of coal

Method and apparatus for deashing coal liquefaction effluents

Method and apparatus for heat processing pulverized brown coal

Method and apparatus for the extraction and recovery of hydrocar

Method and apparatus for treating drill cuttings at an onsite lo

Method for controlling boiling point distribution of coal liquef

Method for converting coal to hydrocarbons by hydrogenation

Method for effecting coal-liquefying reaction

Method for extracting caking coals

Method for heat processing of pulverized brown coal

Method for hydroconversion of solid carbonaceous materials

Method for hydrogenation of coal

Method for liquefying low rank coal

Method for monitoring and controlling hydrogenation pressure in

Method for preparing a coal slurry substantially depleted in min

Method for producing coke

Method for retorting particulate solids having recoverable volat