FCC to minimize butadiene yields

Details FCC to minimize butadiene yields FCC to minimize butadiene yields

1993-01-07

1994-06-28

Breneman, R. Bruce

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 208132, 208118, 208159, C10G 1118, C10G 1105

Patent

active

053244192

ABSTRACT:
A process for fluidized catalytic cracking of heavy feed to make more catalytically cracked products and less thermally cracked products such as butadiene is disclosed. Operating an upflow riser reactor with a riser top temperature of 1050 to 1150 .degree.F., and a short catalyst residence time, yields large volumes of gasoline and light olefins, but reduced yields of butadiene. Preferably cooled catalyst in large amounts contacts severely preheated feed. FCC catalyst with over 30 wt % Y zeolite is preferred.

REFERENCES:
patent: 4800014 (1989-01-01), Hays et al.
patent: 4960503 (1990-10-01), Haun et al.
patent: 5073249 (1991-12-01), Owen
Ind. Eng. Chem. Res., vol. 29, No. 6 Avidan et al. 1990* "Development of Catalytic Cracking Technology".
The Chemistry and Technology of Petroleum, Speight, James G., Marcel Dekker, Inc., New York (1990).

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