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Ethanol to fuels in a catalytic cracking unit stripper

a technology of cracking unit and fuel, which is applied in the direction of fuel, hydrocarbon oil treatment products, organic chemistry, etc., can solve the problems that the us refiner is now limited to the maximum average benzene content, and achieve the effects of reducing reid vapor pressure, facilitating aromatic alkylation, and increasing octane rating

Inactive Publication Date: 2016-06-09
PHILLIPS 66 CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a catalyst that helps convert aromatics in cracked hydrocarbons with ethanol to produce hydrocarbons with a higher octane rating and lower vapor pressure. This conversion also reduces the amount of benzene in the product stream. The catalyst is a spent catalyst from a fluidized catalytic cracking reaction zone. The process involves contacting the stream of cracked hydrocarbons with the catalyst in a stripper unit to partially strip the hydrocarbons from the catalyst before the conversion.

Problems solved by technology

Also, US refiners are now limited to a maximum average benzene content of 1.3% (by vol.) in all products.

Method used

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  • Ethanol to fuels in a catalytic cracking unit stripper
  • Ethanol to fuels in a catalytic cracking unit stripper
  • Ethanol to fuels in a catalytic cracking unit stripper

Examples

Experimental program
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example 1

[0038]Table 1 shows the selectivity of the conversion reaction towards production of hydrocarbons. A feed mixture comprising ethanol was fed at 2 g / hr (per 5 g catalyst) in the presence of a gaseous mix of H2 / N2 / H2O (ratio of 36 / 23 / 8 by volume). A zeolite catalyst ZSM-5 was contacted with the mixture at a temperature of 320° C. and 50 psig. The results (depicted in Table 1) demonstrated that production of hydrocarbons comprising five or more carbons (C5+) was highly-favored.

TABLE 1Product Selectivity from the Conversion of Ethanol to HydrocarbonsEthanol Conversion (wt. %)~100Product Selectivity (wt. %)Methane0.0Ethane0.5Propane3.7Propylene1.3Butanes14.3Butenes2.9C5+77.2Total, (wt. %)~100.0

example 2

[0039]Table 2 provides an example of co-conversion between ethanol and the olefin ethylene, demonstrating the feasibility of embodiments where both an ethanol stream and a slipstream of cracked hydrocarbons are fed to a stripper unit containing a zeolite catalyst. The table shows the product profile resulting from the co-conversion of the olefin ethylene (one example of a hydrocarbon produced in an FCC riser) and ethanol over a zeolite catalyst. A first feed comprised a mixture of ethylene / H2 / N2 / H2O (ratio of 33 / 36 / 23 / 8 by volume) fed with an ethylene weight hour space velocity (WHSV) of 1.0 hr−1. A second feed was ethanol fed at 2 g / hr (per 5 g catalyst). The zeolite catalyst ZSM-5 was contacted with the mixture under the following conditions: 310° C., 0 psig, 1.0 hr−1 (Ethylene WHSV), H2 / N2 / Ethylene / H2O.

TABLE 2Product Selectivity from the Co-conversion of Ethylene andEthanol to HydrocarbonsEthylene Conversion (wt. %)86.5Ethanol Conversion (wt. %)~100Product Selectivity (wt. %)Meth...

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PUM

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Abstract

Processes relating to the conversion of ethanol in a stripper unit of a fluidized catalytic cracking system. An ethanol stream mixes with a catalyst in the stripper unit under conditions of temperature that favor conversion of the ethanol to hydrocarbons, thereby increasing incorporation of ethanol into liquid transportation fuels without exceeding regulatory limits on fuel vapor pressure. Certain embodiments combine the ethanol stream with a hydrocarbon stream and react in the presence of a catalyst in a stripper to produce hydrocarbons that may have an increased boiling point, increased octane rating, decreased vapor pressure, decreased benzene content, or combinations thereof.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0001]This application is a non-provisional application which claims the benefit of and priority to U.S. Provisional Application Ser. No. 62 / 089,314 filed Dec. 9, 2014, titled “Ethanol To Fuels In A Catalytic Cracking Unit Stripper,” which is incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to processes that co-convert ethanol to liquid hydrocarbons fuels.BACKGROUND OF THE INVENTION[0003]Due to recently-enacted US Environmental Protection Agency regulations (Mobile Sources Air Toxics Phase 2), all US reformulated gasoline (RFG) is restricted to a benzene level of 0.62 percent (by volume) as of Jan. 1, 2011. Also, US refiners are now limited to a maximum average benzene content of 1.3% (by vol.) in all products.The new regulations require refiners to find additional strategies to reduce address benzene levels. It is necessary to examine solutions in the context of the ent...

Claims

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Application Information

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IPC IPC(8): C10G50/00C10L10/10C10L1/04
CPCC10G50/00C10L2290/06C10L10/10C10L1/04C10G29/205C10G29/22C10G3/57C10G2300/1088C10G2400/02C10G2400/04C10G2400/08Y02P30/20
Inventor HENNING, WILLIAM D.ALVAREZ, WALTER E.YAO, JIANHUA
Owner PHILLIPS 66 CO