Fluid cat cracking with high olefins production

Details Fluid cat cracking with high olefins production Fluid cat cracking with high olefins production

2007-08-28

2007-08-28

Nguyen, Tam M. (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S106000, C208S114000, C208S118000, C208S119000, C208S078000, C208S074000

Reexamination Certificate

active

10131737

ABSTRACT:
The propylene production of a fluid catalytic cracking unit employing a large pore zeolite cracking catalyst, produces more propylene by adding a naphtha cracking riser and a medium pore zeolite catalytic component to the unit, and recycling at least a portion of the naphtha crackate to the naphtha riser. The large pore size zeolite preferably comprises a USY zeolite and the medium pore size is preferably ZSM-5. Propylene production per unit of naphtha feed to the naphtha riser is maximized, by using the 60–300° F. naphtha crackate as the feed.

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Niccum et al., Maxofin: A Novel FCC Process for Maximizing Light Olefins Using a New Generation of ZSM-5 Additive, Mar. 16, 1998, pp. 1-13.

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