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.
CN110607192AActive Publication Date: 2019-12-24CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2019-12-24

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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.
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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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