Process for making a distillate product and/or c2-c4 olefins

Abstract

A process for making a distillate product and one or more C2-C4 olefins from a FCC feedstock containing a cellulosic material and a hydrocarbon co-feed is provided.

Description

[0001]The present application claims the benefit of U.S. Provisional Patent Application Ser. No. 61 / 583,678, filed Jan. 6, 2012, the entire disclosure of which is hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention relates to a process for making a distillate product and / or C2-C4 olefins.BACKGROUND OF THE INVENTION[0003]The fluidized catalytic cracking (FCC) of heavy hydrocarbons to produce lower boiling hydrocarbon products such as gasoline is well known in the art. FCC processes have been around since the 1940's. Typically, a FCC unit or process includes at least a riser reactor, a catalyst separator and a regenerator. A feedstock is introduced into the riser reactor wherein it is contacted with hot FCC catalyst from the regenerator. The mixture of the feedstock and FCC catalyst passes through the riser reactor and into the catalyst separator wherein the hydrocarbon product is separated from the FCC catalyst. The separated hydrocarbon product passes from the...

AI Technical Summary

Benefits of technology

The patent describes a process for producing fuel using a non-edible renewable energy source, such as cellulosic material. The process involves using an FCC process to produce a distillate product and C2-C4 olefins. One advantage of the process is that it can use a lower temperature in the riser reactor, which reduces coke formation and increases yields of C3 and C4 hydrocarbon products. However, the process also produces a by-product of olefinic gasoline, which can be recycled and converted into blendable gasoline in an intermediate reactor. Overall, the process allows for the use of non-edible renewable energy sources in the production of fuel.

Problems solved by technology

In this case, it is argued that the rate at which biomass is converted to fossil resources is in total imbalance with the rate at which fossil resources are consumed and liberated.

A disadvantage of the process as described in WO2008 / 127956, however, is that the use of plant oils and / or animal fats as an FCC feedstock may compete with their use as food.

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