Fluid catalytic cracking and hydrotreating processes for fabricating diesel fuel from waxes

Inactive Publication Date: 2009-03-12
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]We also provide a system for obtaining a distillate boiling range product from a paraffin-based wax using a method comprising fluid catalytic cracking and hydrogenating. Such a system comprises a fluidized catalytic cracking reactor for cracking a paraffin-based wax at a pressure less than, or equal to, about 7 Kg/cm2 to obtain an olefinic inter

Problems solved by technology

Carbon-localized free radicals and cations are both highly unstable and undergo processes of chain rearrangement, C—C scission in position beta (i.e., cracking) and intra- and intermolecular hydrogen transfer or hydride transfer.
For example, the process results in the production of a relatively large portion of various olefins, and is accordingly less chemically stable.
Olefins in turn form undesirable polymeric deposits in storage tanks, fuel ducts etc.
Despite its many advantages, traditional catalytic hydrocracking is characterized by a number of drawbacks and deficiencies.
For example, using high pressures is energy extensive, at times dangerous, and requires the use of specialized machinery.

Method used

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  • Fluid catalytic cracking and hydrotreating processes for fabricating diesel fuel from waxes
  • Fluid catalytic cracking and hydrotreating processes for fabricating diesel fuel from waxes
  • Fluid catalytic cracking and hydrotreating processes for fabricating diesel fuel from waxes

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Embodiment Construction

[0016]The following definitions are used below, unless otherwise described:

[0017]The term “a Fischer-Tropsch wax” is defined as a mixture comprised of predominantly n-paraffins having the number of carbons between about 20 and about 150, the mixture also optionally containing a fraction of oxygenates, and optionally a trace amount of cycloparaffins and / or aromatic compounds.

[0018]The term “a slack wax” is defined as a crude wax produced by chilling and solvent filter-pressing wax distillate.

[0019]The term “catalytic cracking” refers to a process of refining of a hydrocarbon-based feedstock using high temperature and relatively low pressure in the presence of a catalyst, as a result of which heavy and relatively complex hydrocarbons that are present in feedstock are broken down into simpler and lighter hydrocarbons.

[0020]The term “fluid catalytic cracking” or “FCC” refers to a type of catalytic cracking, which employs a catalyst, typically in a form of a powder, having the particles ...

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Abstract

A method for obtaining a petroleum distillate product is provided, the method including subjecting a paraffin-based wax, such as a Fisher-Tropsch wax, to the process of cracking at a pressure less than, or equal to, about 7 Kg / cm2 in the presence of a first catalyst to obtain an olefinic intermediate, the cracking being carried out in a fluid catalytic cracking apparatus, followed by hydrogenating the olefinic intermediate at a pressure less than, or equal to, about 35 Kg / cm2, in the presence of a second catalyst, and recovering the petroleum distillate product. An apparatus for carrying out the method is also provided.

Description

TECHNICAL FIELD[0001]This disclosure relates generally to the processes of fabricating various petroleum-based fuels, and more specifically, to fluid catalytic cracking (FCC) and hydrogenation processes for obtaining petroleum distillate, kerosene and diesel fuel from paraffin-based waxes such as Fischer-Tropsch or slack waxes.BACKGROUND INFORMATION[0002]Fischer-Tropsch synthesis is known to yield a broad mixture of products including primarily paraffins, and some olefins. The individual compounds of such mixture can contain up to about 200 carbons, the number of carbons between about 20 and about 150, with average number about 60 being typical. Certain limited quantities of oxygenated products and trace amounts of sulfur- or nitrogen containing products or aromatic compounds can be also present. Such mixtures are known as “Fischer-Tropsch” waxes. Fischer-Tropsch waxes are frequently used as a raw material for obtaining various petrochemical products, such as, e.g., petroleum distil...

Claims

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Application Information

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IPC IPC(8): C10G73/42
CPCC10G11/02C10G69/04C10G45/00C10G11/18
InventorPETRI, JOHN A.
OwnerUOP LLC