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Method for simultaneously producing low-oil-content wax and medium and high viscosity index base oils

A technology containing oil wax and base oil, which is applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil processing products, etc., can solve the problems of poor economic benefit, low product yield, low base oil viscosity index, etc.

Active Publication Date: 2019-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of low base oil viscosity index, low product yield and poor economic benefit when the existing hydroisomerization technology processes hydrocracking tail oil to produce lubricating oil base oil, and provides a Method for simultaneously producing low oil content wax and medium and high viscosity index base oil

Method used

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  • Method for simultaneously producing low-oil-content wax and medium and high viscosity index base oils
  • Method for simultaneously producing low-oil-content wax and medium and high viscosity index base oils
  • Method for simultaneously producing low-oil-content wax and medium and high viscosity index base oils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] This example is used to illustrate the method for producing low oil wax and medium and high viscosity index base oil by hydrocracking tail oil provided by the present invention.

[0089] The >350°C distillate of hydrocracking tail oil is used as the raw material, and the properties of the raw material are shown in Table 1.

[0090] See Table 2 for solvent dewaxing, solvent deoiling conditions, deoiled wax, dewaxed oil and waxed oil properties of hydrocracking tail oil.

[0091] The ratio of the refractive index of the dewaxing solvent at the dewaxing filtration temperature to the refractive index of the mixture of liquid components in the feed oil and the dewaxing solvent at the filtration temperature is 0.96.

[0092] 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 0.96.

[0093] See Ta...

Embodiment 2

[0096] This example is used to illustrate the method for producing low oil wax and medium and high viscosity index base oil by hydrocracking tail oil provided by the present invention.

[0097] The 350°C-400°C fraction of hydrocracking tail oil is used as the raw material, and the properties of the raw material are shown in Table 1.

[0098] See Table 2 for solvent dewaxing, solvent deoiling conditions, deoiled wax, dewaxed oil and waxed oil properties of hydrocracking tail oil.

[0099] The ratio of the refractive index of the dewaxing solvent at the dewaxing filtration temperature to the refractive index of the mixture of liquid components in the feed oil and the dewaxing solvent at the filtration temperature is 0.99.

[0100] 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.

[0101] See...

Embodiment 3

[0103] This example is used to illustrate the method for producing low oil wax and medium and high viscosity index base oil by hydrocracking tail oil provided by the present invention.

[0104] The 400°C-450°C fraction of hydrocracking tail oil is used as the raw material, and the properties of the raw material are shown in Table 1.

[0105] The solvent dewaxing of hydrocracking tail oil, solvent deoiling conditions, properties of dewaxed oil and waxed oil are shown in Table 2.

[0106]The ratio of the refractive index of the dewaxing solvent at the dewaxing filtration temperature to the refractive index of the mixture of liquid components in the feed oil and the dewaxing solvent at the filtration temperature is 0.98.

[0107] 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.

[0108] ...

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Abstract

The invention relates to the field of petrochemical industry, and discloses a method for simultaneously producing low-oil-content wax and medium and high viscosity index base oils, which comprises thefollowing steps: (1) separating a fraction with a distillation range of not less than 350 DEG C from hydrocracking tail oil; (2) under a dewaxing condition, contacting the fraction with a distillation range of not less than 350 DEG C with a dewaxing solvent to carry out solvent dewaxing so as to obtain dewaxed oil and oil-containing cerate, wherein the dewaxed oil is used as a raw material for producing viscosity index base oil; (3) under a deoiling condition, contacting the oil-containing cerate with a deoiling solvent to carry out solvent deoiling so as to obtain deoiled wax and dewaxed oil, wherein the deoiled wax is used as a raw material for producing petroleum wax; and (4) carrying out hydroisomerization and hydrofining on the under-wax oil to obtain the high-viscosity index base oil. The method provided by the invention can be used for producing the low-oil-content wax and the base oil with medium and high viscosity indexes at the same time.

Description

technical field [0001] The invention relates to a method for simultaneously producing low oil content wax and medium and high viscosity index base oil by using hydrocracking tail oil as raw material. Background technique [0002] Hydrocracking tail oil is the heavy component that is not converted into light oil when the hydrocracking unit processes vacuum distillate oil. Due to the relatively harsh hydrocracking reaction, the content of aromatics in the hydrocracking tail oil is extremely low. Or it does not contain aromatics, and the heteroatom content is very low. Therefore, hydrocracking tail oil is the preferred raw material for the production of high viscosity index lubricating base oil. [0003] In the technology of producing high viscosity index base oil through isomerization dewaxing process using hydrocracking tail oil as raw material, there are many patent applications / patents for hydroisomerization dewaxing catalysts, for example, US4518485, US5149421, etc., which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/302C10G2400/10
Inventor 管翠诗彭东岳丁洛蔡晨王玉章陈国成
Owner CHINA PETROLEUM & CHEM CORP
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