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Fischer-tropsch derived diesel fuel and process for making same

A technology of fuel and diesel, applied in the field of preparing the fuel, can solve the problems of being unsuitable for commercial diesel fuel and failing to meet the cloud point specification of diesel fuel, etc.

Inactive Publication Date: 2010-03-24
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, these documents teach the use of specified range alcohols, especially the use of C 11+ Compositions of alcohols that do not meet the cloud point specification for diesel fuel, and therefore they are not suitable as commercial diesel fuel

Method used

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  • Fischer-tropsch derived diesel fuel and process for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this example, a Fischer-Tropsch diesel fuel with a high iso / normal ratio and an end point of 600°F (315°C) as measured by ASTM D2887 was prepared and tested.

[0040] Fischer-Tropsch C from Moore and Munger 80 Commercial sample of wax. It has an initial boiling point of 790°F as measured by ASTM D 2887 and a boiling point of 856°F at 5 wt%. It was hydrocracked in a single stage demonstration plant at 669°F, 1.0 LHSV, 1000 psig, 10000 SCF / Bbl hydrogen at about 90% conversion in single pass operation (no recycle). A commercially available sulfided hydrocracking catalyst was used. The 260-600°F product was recovered by distillation with the following properties. The product contains more than 2 wt% n-C 14+ Normal paraffins, but still have a cloud point of -51 °C.

[0041] Density at 15°C, g / ml

0.7626

Sulfur, ppm

0

Viscosity at -20°C, cSt

6.382

freezing point, ℃

-47.7

cloud point, ℃

-51

Flash ...

Embodiment 2

[0049] Additional diesel fuel samples with end points of 675°F (357°C) and 450°F (232°C) and intermediate iso / normal ratios were prepared and tested as follows. This sample meets the end boiling point and flash point requirements of ASTM D975 for No. 2-D fuels.

[0050] Samples of Fischer-Tropsch condensate and wax were produced from the cobalt catalyst. At 3.36 LHSV, 1000 psig total pressure, 5000 SCFB recycle gas ratio in vulcanized commercially available monolithic extrudate non-acid NiMo / Al 2 o 3 The condensate is hydrotreated over the catalyst. In vulcanized commercial monolithic extrudate acidic NiW / Al at 1.2 LHSV, 66% conversion per pass, 1000 psig total pressure, 5000 SCFB recycle gas ratio below 675°F (357°C) 2 o 3 -SiO 2 The wax is hydrocracked over the catalyst. The products from the two plants were continuously mixed and distilled. Materials boiling above the diesel cut point (approximately 675°F-357°C) are recycled to be consumed in the hydrocracker.

[00...

Embodiment 3

[0060] The diesel product from Example 2 was further distilled to obtain a 250-400°F (121-204°C) diesel fuel fraction that mimics No. 1-D fuel with these properties.

[0061] nature

[0062] nitrogen

[0063] These studies show that the addition of small amounts of dodecanol has a significant detrimental effect on cloud point. Addition of as little as 0.01 wt% oxygen as 1-dodecanol results in a cloud point (°C as measured by ASTM D2500) well above the lowest cloud point limit of -49°C. Join C 5 -C 10 Alcohols do not cause a significant increase in cloud point. All wt % oxygen concentrations mentioned above are measured on an anhydrous basis.

[0064] Preferably with 1-C 5 to 1-C 10 The FT diesel alcohol composition is exemplified below.

[0065] FT diesel with 1-heptanol

[0066]

[0067] FT diesel with 1-pentanol

[0068]

[0069] FT diesel with 1-dodecanol

[0070]

[0071] FT Diesel with 1-Decanol

[0072] ...

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Abstract

The present invention is directed to a Fischer-Trospch derived distillate suitable for use as a distillate fuel having a flash point 38 DEG C minimum measured by ASTM D 93 and a cloud point of +14 DEG C or less and further containing not less than 0.01 wt.% oxygen in each of 1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, 1-decanol and not more than 0.01 wt.% oxygen in C11+ linear alcohols. Preferably, the Fischer-Trospch derived distillate will have a cloud point at or below 0 DEG C, and more preferably the cloud point of the Fischer-Tropsch derived distillate will be at or below-15 DEG C.

Description

field of invention [0001] The present invention relates to Fischer-Tropsch diesel fuels, distillate fuels, or blending components that also meet the specifications of diesel fuels but are lighter in density than conventional diesel fuels, and methods of making said fuels. Background of the invention [0002] Distillate fuels are fuels that contain components that boil above the end point of typical gasoline (about 400°F or 204°C), but exclude components not obtainable by distillation (boiling above 1100°F or substances at 593°C). Distillate fuels may be burned in stationary engines such as those used to generate electricity. Diesel fuel is the distillate that is burned in diesel engines to provide energy for various human activities. Diesel fuel has stricter specifications than distillate fuel. For example, in the United States, the end point specification for diesel fuel is 640°F (338°C) for No. 2-D and 550°F (288°C) for No. 1-D. [0003] Different grades of diesel fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G51/06
CPCC10L1/026Y02E50/32Y02E50/30C10G51/06C10L1/08
Inventor D·J·奥里尔
Owner CHEVROU USA INC
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