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Method for producing base oil with low-oil wax and high viscosity index

A high-viscosity, base oil technology, used in the petroleum industry, hydrocarbon oil processing, hydrocarbon oil processing products, etc., can solve the problems of low product yield and poor economic benefits

Active Publication Date: 2019-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to overcome the problems of low product yield and poor economic benefit when using Fischer-Tropsch synthesis products to produce lubricating oil base oils in the prior art, and provide a method for simultaneously producing low-oil wax and high-viscosity index base oils. The method can increase the yield of isomerized dewaxed base oil, thereby improving the utilization efficiency of Fischer-Tropsch synthesis products

Method used

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  • Method for producing base oil with low-oil wax and high viscosity index
  • Method for producing base oil with low-oil wax and high viscosity index
  • Method for producing base oil with low-oil wax and high viscosity index

Examples

Experimental program
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Effect test

Embodiment 1

[0070] This example is used to illustrate the method for producing low oil content wax and high viscosity index base oil from Fischer-Tropsch synthetic wax provided by the present invention.

[0071] The >350°C distillate of Fischer-Tropsch synthetic wax is used as the raw material, and the properties of the raw material are shown in Table 1.

[0072] See Table 2 for the solvent deoiling conditions, properties of the dewaxed oil and the underwax oil of the >350°C fraction of the Fischer-Tropsch synthetic wax.

[0073] At a deoiling filtration temperature, the ratio of the refractive index of the deoiling solvent to the refractive index of the mixture of the liquid components in the raw oil and the deoiling solvent at the filtration temperature is 0.97.

[0074] Table 3 shows the reaction conditions of the first hydrofinishing, hydroisomerization and second hydrofinishing of the underwax oil and the properties of the second hydrofinishing products.

[0075] Table 4 shows the p...

Embodiment 2

[0077] This example is used to illustrate the method for producing low oil content wax and high viscosity index base oil from Fischer-Tropsch synthetic wax provided by the present invention.

[0078] The 350°C-400°C fraction of Fischer-Tropsch synthetic wax is used as the raw material, and the properties of the raw material are shown in Table 1.

[0079] See Table 2 for the solvent deoiling conditions, properties of dewaxed oil and underwax oil of the 350°C-400°C fraction of Fischer-Tropsch synthetic wax.

[0080] At a deoiling filtration temperature, the ratio of the refractive index of the deoiling solvent to the refractive index of the mixture of the liquid components in the raw oil and the deoiling solvent at the filtration temperature is 0.995.

[0081] See Table 3 for the reaction conditions and base oil properties of the first hydrofinishing, hydroisomerization and second hydrofinishing of waxy oil.

Embodiment 3

[0083] This example is used to illustrate the method for producing low oil content wax and high viscosity index base oil from Fischer-Tropsch synthetic wax provided by the present invention.

[0084] The 400°C-450°C distillate of Fischer-Tropsch synthetic wax is used as the raw material, and the properties of the raw material are shown in Table 1.

[0085] See Table 2 for the solvent deoiling conditions, properties of dewaxed oil and underwax oil of the 400°C-450°C fraction of Fischer-Tropsch synthetic wax.

[0086] At a stage of deoiling filtration temperature, the ratio of the refractive index of the deoiling solvent to the refractive index of the mixture of liquid components in the raw oil and the deoiling solvent at the filtration temperature is 0.99.

[0087] See Table 3 for the reaction conditions and base oil properties of the first hydrofinishing, hydroisomerization and second hydrofinishing of waxy oil.

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Abstract

The invention relates to the field of petrochemical engineering and discloses a method for producing base oil with low-oil wax and high viscosity index. The method comprises the steps as follows: (1)a fraction with the distillation range not smaller than 350 DEG C is separated from a Fischer-Tropsch synthesis product; (2) under the oil removal condition, the fraction with the distillation range not smaller than 350 DEG C makes contact with an oil removal solvent for solvent oil removal, and oil-removed wax and oil from wax are obtained; (3) the oil from the wax is subjected to optional primary hydrofining, isodewaxing and secondary hydrofining, and the base oil is obtained. The method has the characteristic of high yield of base oil and can produce a high-quality low-oil wax product.

Description

technical field [0001] The invention relates to a method for simultaneously producing low-oil wax and high-viscosity index base oil by using Fischer-Tropsch synthesis products as raw materials. Background technique [0002] The chain hydrocarbon organic compound produced by the Fischer-Tropsch synthesis method, which uses the synthesis gas produced by natural gas or coal and coke gasification as raw material, is called Fischer-Tropsch synthesis wax because of its high freezing point. [0003] Fischer-Tropsch synthetic waxes can be reprocessed to produce high value-added products. For example, US5834522 discloses a method of using Fischer-Tropsch synthesis products as raw materials to produce base oil through a hydroisomerization process. This technology first passes the Fischer-Tropsch synthesis products through a hydroisomerization device, and after an isomerization reaction occurs, the product Then it is distilled and cut to produce lubricating base oils with different vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/1037C10G2400/10
Inventor 管翠诗王玉章丁洛蔡晨陈国成彭东岳
Owner CHINA PETROLEUM & CHEM CORP