Process of generating C.sub.3 - and C.sub.4 -olefins from a feed

Details Process of generating C.sub.3 - and C.sub.4 -olefins from a feed Process of generating C.sub.3 - and C.sub.4 -olefins from a feed

1997-11-14

1999-11-09

Knode, Marian G.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By c content reduction, e.g., cracking, etc.

585648, 585649, 208120, 208130, C07G 402, C10G 1102, C10G 936

Patent

active

059818190

ABSTRACT:
A feed mixture containing C.sub.4 -olefins to C.sub.7 -olefins is evaporated and mixed with steam in a weight ratio of H.sub.2 O:hydrocarbons in the range from 0.5:1 to 3:1. The steam containing feed mixture with an inlet temperature in the range from 380.degree. to 500.degree. C. is introduced into a reactor, which contains a bed of granular, form-selective zeolite catalyst. The zeolite is of the pentasil type and has an atomic ratio of Si:Al of 10:1 to 200:1. From the bed a product mixture is withdrawn whose temperature is 20.degree. to 80.degree. lower than the inlet temperature, and whose total content of propylene and butene isomers is at least 60 wt-% of the olefinic constituents of the feed mixture.

REFERENCES:
patent: 4980053 (1990-12-01), Li et al.
patent: 5063187 (1991-11-01), Burgfels et al.

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