Visbreaking

This is a thermal cracking process. Like catalytic cracking, it breaks up large molecules into smaller ones. Visbreaking is applied to the residue of vacuum distillation as part of an overall conversion process.

visbreaking

(from the article `petroleum refining`) Since World War II the demand for light products (e.g., gasoline, jet, and diesel fuels) has grown, while the requirement for heavy industrial fuel ...
Found on http://www.britannica.com/eb/a-z/v/29
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