Reducing NO.sub.x emissions from FCC regenerators by segregated

Details Reducing NO.sub.x emissions from FCC regenerators by segregated Reducing NO.sub.x emissions from FCC regenerators by segregated

1990-02-12

1991-01-15

Myers, Helane E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural parallel stages of chemical conversion

208 80, 208113, 208 85, 208153, 266254, 266127, 502 12, 502 20, 502514, C10G 7100

Patent

active

049851330

ABSTRACT:
A fluidized catalytic cracking process using a riser reactor to crack a mixture of high and low nitrogen content fresh feeds is operated to reduce NO.sub.x emissions in the regenerator flue gas. Segregation of the feed into high and low nitrogen content streams, and addition of the high nitrogen content feed to the base of the riser, followed by separate addition of the low nitrogen content feed higher up in the riser, reduces NO.sub.x emissions and reduces production of low value products from the FCC unit.

REFERENCES:
patent: 3224958 (1965-12-01), Schlinger
patent: 3617494 (1971-11-01), Montgomery
patent: 3941680 (1976-03-01), Bryson et al.
patent: 4073718 (1978-02-01), Hamner
patent: 4218306 (1980-08-01), Gross et al.
patent: 4869807 (1989-09-01), Krishna

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