.~ Chemical modification of solids before hydrogenation
DEFINITION
Classification: 208/403
Chemical modification of solids before hydrogenation:
(under subclass 400) Subject matter including a hydrogenation step and a step, upstream of the hydrogenation, in which a solid feed to the process undergoes a partial chemical reaction, which does not change the essential nature of the feed; e.g., coal may be deoxgenated or desulfurized, but it is not solublized or converted to coke.
(1) Note. A step of hydrogenation is any chemical conversion step specified as being performed in the presence of free hydrogen or a compound specified as being a hydrogen donor.
(2) Note. Mere removal of chemically nonbound water is not
considered to be a chemical modification for this subclass.
SEE OR SEARCH CLASS
44, Fuel and Related Compositions,
620+, for chemical modification of coal, per se, without liquefaction.
