ABSTRACT
In any text about coal (but more speci“cally in any chapter about coal liquefaction), it is appropriate to include a listing of the types of processes available as well as a description of the different processes. However necessary as this might be, it is not the intent to reproduce all of the liquefaction processes here (a virtually impossible task where so many of the processes might be derived from a single concept) but to give selected examples of speci“c processes.
