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Hydrofining method for Fischer-Tropsch oil

A technology of Fischer-Tropsch synthetic oil and Fischer-Tropsch synthesis, which is applied in the fields of petroleum wax refining, hydrotreating process, petroleum industry, etc., can solve problems such as complicated technological process, reduce coking and carbon deposition, and simplify technological process Effect

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for feedstocks with low olefin content, the process is too complicated

Method used

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  • Hydrofining method for Fischer-Tropsch oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 uses raw material a, and the volume ratio of catalyst A and catalyst B is 0.2:1.

[0028] Hydrogenation process conditions: reaction temperature 220°C, pressure 6MPa, liquid hourly volume space velocity for catalyst B 1.0h -1 , The volume ratio of hydrogen to oil is 600.

[0029] The properties of the obtained hydrogenated product are as follows: the distillation range <140°C, <380°C and <500°C are 4.2%, 49.9% and 78.0%, respectively, and the simulated distillation dry point is 698°C. <380°C distillate bromine value is 0.2gBr / 100g. After running for 100 hours, the carbon deposits of catalysts A and B were measured to be 3% (mass fraction) and 3.5% (mass fraction) respectively.

[0030] After separation of the obtained hydrogenated product, a fraction at 400-500°C is obtained, and its properties are as follows: melting point 58.5°C, oil content 0.9%, Saybolt color +29, light stability 3#, thermal stability 27#.

Embodiment 2

[0037] Embodiment 2 uses raw material b, and the volume ratio of catalyst A and catalyst B is 0.2:1.

[0038] Hydrogenation process conditions: reaction temperature 220°C, pressure 6MPa, liquid hourly volume space velocity for catalyst B 1.0h -1 , The volume ratio of hydrogen to oil is 600.

[0039] After running for 100 hours, the carbon deposits of catalysts A and B were measured to be 2.8% (mass fraction) and 3.0% (mass fraction) respectively.

[0040] The properties of the obtained hydrogenated product: the distillation range <140°C, <380°C and <500°C are 0.1%, 34.0% and 73.5% respectively, and the simulated distillation dry point is 673°C. <380°C distillate bromine value is 0.2gBr / 100g.

[0041] After separation of the obtained hydrogenated product, a 400-500°C fraction is obtained, and its properties are as follows: melting point 58.5°C, oil content 0.9%, Saybolt color +30, light stability 3#, thermal stability 28#.

Embodiment 3-6

[0049] The raw materials, catalysts, reaction conditions and product properties used in Examples 3-6 are shown in Table 2, wherein Examples 3-5 use catalysts A and B, and Example 6 uses catalysts A and C.

[0050] Table 2

[0051]

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Abstract

The invention discloses a hydrofining method for Fischer-Tropsch oil. In the method, a fixed bed reactor is used, and the Fischer-Tropsch oil is contacted with the diolefins hydrogenation saturation catalyst so as to hydrogenate and saturate diolefins and then is contacted with the hydrogenated deoxidized catalyst in order to carry out olefin saturation and hydrodeoxygenation reactions, so as to obtain the hydrofined products. Compared with the method using a single catalyst, the method disclosed by the invention can reduce the coke and deposited carbon formed by polymerizing dienes. Compared with the method using a double reactor, the method disclosed by the invention simplifies the process flow.

Description

technical field [0001] The invention relates to a method for hydrofining Fischer-Tropsch synthetic oil, more specifically to a method for hydrofining Fischer-Tropsch synthetic heavy oil and Fischer-Tropsch wax. Background technique [0002] With the shortage of petroleum resources, coal-to-liquids (CTL) or natural gas-to-liquids (GTL) have received widespread attention. Among them, coal indirect liquefaction to oil and natural gas to oil both rely on Fischer-Tropsch synthesis. The series of oil products produced have many excellent characteristics that natural oil does not have, such as single composition, no aromatics, ultra-low sulfur content, etc. Among them, Fischer-Tropsch synthetic diesel has a high cetane number, and Fischer-Tropsch synthetic wax does not contain aromatics, and has excellent quality that is difficult to achieve with petroleum wax. However, Fischer-Tropsch synthetic oil contains olefins and oxygenated compounds such as fatty alcohols and ethers. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/06C10G73/44
Inventor 袁平飞孙剑锋
Owner CHINA PETROLEUM & CHEM CORP
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