Flow diagram of coal to coaltarpitch process
Flow diagram of coal to coaltarpitch process (Public domain.) Thumbnail Medium Original. Detailed Description. Coal tar is a byproduct of the coking, liquefaction, or gasifiion of coal. Coaltar pitch is the residue that remains after the distillation of coal tar. Coal tar and coaltar pitch are used in coaltarbased sealcoat products, although use of coaltar pitch is more common than ...