A method for hydroconversion of coal solids in a solvent by contact with molecular hydrogen and catalyst solids in a reactor. The catalyst solids are catalytically active substances including promoted or unpromoted molybdenum on an alumina support material. The support is characterized by bimodal pore...http://www.google.de/patents/US4257922?utm_source=gb-gplus-sharePatent US4257922 - Process for coal liquefaction and catalyst
