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catalytic cracking

the reduction of the molecular weight of hydrocarbons by a catalyst, accomplished in a petroleum refinery by a type of chemical reactor (catalytic cracker)
Compare cracker (def 8), cracking (def 1). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for catalytic cracker

catalytic cracker

a unit in an oil refinery in which mineral oils with high boiling points are converted to fuels with lower boiling points by a catalytic process Often shortened to cat cracker
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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