Characteristics of product distribution of high acid crudes cracking were analyzed and discussed in fluid catalytic cracking process. Based on the mechanism of carbocation reaction and the theory of organic chemistry, the mechanism of catalytic decarboxylation on Brönsted acid and Lewis acid were put forward. For Brönsted acid, the intermediate was formed by the protonation of carbonyl oxygen with more negative charge, followed by the cleavage of C-C bond between the carbon atom of the carbonyl group and the α carbon atom, to give carbenium ion, CO and H2O. Lewis acid, as an electrophilic reagent, abstracted carboxyl from petroleum acids and subsequently release CO2.

Exploration on the mechanism of deacidification during catalytic cracking of high acidic crude

253rd National Meeting (2017)

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