Canada and nitrogen. There are also trace amounts of metals and organic compounds. While trace amounts of toxic materials have been measured in petroleum coke or petcoke. Petcoke is a co-product of several processes used during petroleum refining to upgrade "residuum" into gasoline and middle distillate-range fuels. Residuum (or resid) is the substance that remains after refineries initially distill heavy crude oils.The use of petcoke has enabled many North American businesses to remain competitive in the global marketplace while employing thousands of people in manufacturing jobs with good wages and benefits. Material Safety Data sheets for petcoke indicate it is non-toxic and non-carcinogenic and the EPA does not consider petroleum coke a hazardous ...Apr 16
