Process for separating ethylene from light olefin mixtures while producing both gasoline and fuel oil
AssigneeMobil Oil Corporation
InventorsWilliam E. Garwood, Wooyoung Lee
Life of this patent
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Abstract
A process is disclosed for separating ethylene in admixture with light olefins by contacting said olefinic mixture under very critical reaction conditions over a special catalyst, such as a zeolite of the ZSM-5 type so as to selectively react the C.sub.3 and higher olefins and convert the same to both gasoline and fuel oil.
Claims8
In the process of contacting mixtures of C.sub.2 -C.sub.5 olefins with an acidic crystalline aluminosilicate zeolite having a pore diameter greater than about 5 Angstroms, a silica-to-alumina ratio of at least 12, and a constraint index within the range of 1-12 at elevated temperatures, the improvement which comprises (a) carrying out said contact at a temperature of from about 300.degree.-600.degree. F., a pressure of from about 100-1,000 psig and at a space velocity with regard to C.sub.3 and higher olefins ranging from about 0.1 to 10 WHSV;
- (b) said temperature, space velocity and pressure being chosen so as to convert at least 80% of the C.sub.3 and higher olefins and no more than about 20 weight percent of said ethylene;
- (c) obtaining a product comprising both fuel oil and gasoline;
- and (d) recovering ethylene by flashing it off the higher boiling product.
Dependencies are inferred from the claim text.