Process For Producing A Gasoline Blending Component And A Middle Distillate By Adjusting A Level Of A Halide Containing Additive During Alkylation

PATENT
Process For Producing A Gasoline Blending Component And A Middle Distillate By Adjusting A Level Of A Halide Containing Additive During Alkylation
United States Patent Application 20120226086
Inventors:
Hommeltoft, Sven Ivar (Pleasant Hill, CA, US)
Miller, Stephen Joseph (San Francisco, CA, US)
Pradhan, Ajit Ramchandra (Walnut Creek, CA, US)
Application Number:
13/443032
Publication Date:
09/06/2012
Assignee:
Chevron U.S.A. Inc. (San Ramon, CA, US)
Abstract:
A process for producing a gasoline blending component and a middle distillate, comprising adjusting a level of a halide containing additive provided to an ionic liquid alkylation reactor to shift selectivity towards heavier products, and recovering a low volatility gasoline blending component and the middle distillate.

FIELD OF THE INVENTION
This invention is directed to a process for producing a low volatility gasoline blending component and a middle distillate using an ionic liquid.

DETAILED DESCRIPTION OF THE INVENTION
Definitions

The term “comprising” means including the elements or steps that are identified following that term, but any such elements or steps are not exhaustive, and an embodiment may include other elements or steps.

A “middle distillate” is a hydrocarbon product having a boiling range between 250° F. to 1100° F. (121° C. to 593° C.). The term “middle distillate” includes the diesel, heating oil, jet fuel, and kerosene boiling range fractions. It may also include a portion of naphtha or light oil. A “naphtha” is a lighter hydrocarbon product having a boiling range between 100° F. to 400° F. (38° C. to 204° C.). A “light oil” is a heavier hydrocarbon product having a boiling range that starts near 600° F. (316° C.) or higher. A “jet fuel” is a hydrocarbon product having a boiling range in the jet fuel boiling range. The term “jet fuel boiling range” refers to hydrocarbons having a boiling range between 280° F. and 572° F. (138° C. and 300° C.). The term “diesel fuel boiling range” refers to hydrocarbons having a boiling range between 250° F. and 1000° F. (121° C. and 538° C.). The term “light oil boiling range” refers to hydrocarbons having a boiling range between 600° F. and 1100° F. (316° C. and 593° C.). The “boiling range” is the 10 vol % boiling point to the final boiling point (99.5 vol %), inclusive of the end points, as measured by ASTM D 2887-06a.

A “middle distillate blending component” is a middle distillate, suitable for blending into a hydrocarbon product meeting desired specifications.

A “gasoline blending component” may be either a gasoline or a naphtha hydrocarbon product suitable for blending into a gasoline. “Gasoline” is a liquid hydrocarbon used as a fuel in internal combustion engines.

A “low volatility gasoline blending component” is a naphtha hydrocarbon product having a boiling range between 100° F. to 380° F. (38° C. to 193° C.) and a Reid Vapor Pressure of 2.5 psi (17.2 kPa) or less. In one embodiment the Reid Vapor Pressure is less than an amount defined by the equation RVP=−0.035×(50 vol % boiling point, ° C.)+5.8, in psi.

“Alkyl” means a linear saturated monovalent hydrocarbon radical of one to six carbon atoms or a branched saturated monovalent hydrocarbon radical of three to eight carbon atoms. In one embodiment, the alkyl groups are methyl. Examples of alkyl groups include, but are not limited to, groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, t-butyl, n-pentyl, and the like.

“Unsupported” means that the catalyst or the halide containing additive is not on a fixed or moveable bed of solid contact material, such as non-basic refractory material, e.g., silica.
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