What is Crude Coal Tar and how does it differ from Refined Tar or Refined Coal Tar?
Crude Coal Tar sometimes referred to as crude coke oven tar or simply coal tar is a byproduct collected during the carbonization of coal to make coke. Coke is uses as a fuel and as a reducing agent in smelting iron ore in a blast furnace to manufacture steel and in foundry operations. Crude coal tar consists of a mixture of naturally occurring compounds containing hydrogen and carbon that are common to all organic fuels including coal, petroleum and wood. Crude coal tar is a raw material which is further distilled to produce various carbon products, refined tars and oils used as essential components in the production of aluminum, rubber, concrete, plasticizers, coatings and specialty chemicals. Crude coal tars have been processed in the United States since Koppers Company completed the first by-product coke ovens around 1912. A specially processed refined tar meeting ASTM D490 specification for RT-12 is the material used in the production of pavement sealer. During the distillation of
