Integrated alkylation process using ionic liquid catalysts
AssigneeChevron U.S.A. Inc.
InventorsHye Kyung C. Timken, Saleh Elomari, Steve Trumbull, Robert Cleverdon
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Abstract
An integrated refining process for the production of high quality gasoline blending components from low value components is disclosed. In addition there is disclosed a method of improving the operating efficiency of a refinery by reducing fuel gas production and simultaneously producing high quality gasoline blending components of low volatility. The processes involve the alkylation of a refinery stream containing pentane with ethylene using an ionic liquid catalyst.
Claims32
An integrated refinery process for the production of high quality gasoline blending components having low volatility comprising:
- (a) providing a first ethylene-containing refinery stream;
- (b) separating a C2+ fraction from said first stream to produce a second refinery stream richer in ethylene than said first stream;
- (c) providing an isopentane-containing refinery stream;
- (d) contacting said isopentane-containing refinery stream with said second refinery stream in the presence of an ionic liquid catalyst in the absence of a Group IV B metal compound in an alkylation zone under alkylation conditions for 0.5 to 60 minutes whereby an ethylene conversion of at least 65% is obtained;
- and
- (e) recovering high quality gasoline blending components of low volatility from said alkylation zone.
A method of improving the operating efficiency of a refinery by reducing fuel gas production and simultaneously producing high quality gasoline blending components of low volatility comprising:
- (a) providing a first refinery stream comprising hydrogen and C2-C5 olefins;
- (b) separating a C2+ fraction from said first stream to produce a second refinery stream richer in olefins than said first stream and a third refinery stream richer in hydrogen than said first stream;
- (c) providing an isopentane-containing refinery stream;
- (d) contacting said isopentane-containing refinery stream with said second refinery stream in the presence of an ionic liquid catalyst in the absence of a Group IV B metal compound in an alkylation zone under alkylation conditions for 0.5 to 60 minutes whereby an ethylene conversion of at least 65% is obtained;
- (e) recovering high quality gasoline blending components of low volatility from said alkylation zone;
- and
- (f) recovering hydrogen from said third refinery stream.
A high quality gasoline blending composition having low volatility prepared by a process comprising:
- (a) providing a first ethylene-containing refinery stream;
- (b) separating a C2+ fraction from said first stream to produce a second refinery stream richer in ethylene than said first stream;
- (c) providing an isopentane-containing refinery stream;
- (d) contacting said isopentane-containing refinery stream with said second refinery stream in the presence of an ionic liquid catalyst in the absence of a Group IV B metal compound in an alkylation zone under alkylation conditions for 0.5 to 60 minutes whereby an ethylene conversion of at least 65% is obtained;
- and
- (e) recovering high quality gasoline blending components of low volatility from said alkylation zone.
Dependencies are inferred from the claim text.