A kind of preparation method of high viscosity index lubricating oil base oil

A lubricating oil base oil, high viscosity technology, applied in the field of oil refining, can solve the problems of low viscosity, product yield loss, etc., to achieve the effect of ensuring yield, reducing the possibility of excessive cracking, and avoiding excessive yield loss

Active Publication Date: 2019-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production of lubricating oil base oil fractions by the above method will cause the loss of product yield and the problem of low viscosity.

Method used

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  • A kind of preparation method of high viscosity index lubricating oil base oil

Examples

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preparation example Construction

[0024] The invention provides a kind of preparation method of high viscosity index lubricating oil base oil, and the method comprises:

[0025] (1) The raw oil and the hydrogen-containing stream are introduced into the isomerization depreciation reaction zone for reaction to obtain the oil converted from isomerized wax, wherein the isomerization depreciation reaction zone includes at least two sequentially loaded hydrofining catalysts and a catalyst bed of heterogeneous depressing catalyst;

[0026] (2) introducing the isomerized wax conversion product oil into a supplementary refining reaction zone containing a hydrorefining catalyst for reaction to obtain a hydrorefining product oil; and

[0027] (3) introducing the hydrorefined oil into a separation zone for separation.

[0028] In the method of the present invention, at least two stages of hydrofining catalysts are added in the isomerization depressing reaction zone, so that the aromatics, naphthenes and polycyclic naphth...

Embodiment 1

[0074] In this example, a hydrocracking tail oil is used as a raw material, and its properties are shown in Table 1.

[0075] according to figure 1 The process flow processes the raw material. The catalysts are: the first hydrofinishing reaction unit and the second hydrofinishing reaction unit of the isomerism depreciation reaction zone are loaded with hydrofinishing catalyst I, the first isomerism depreciation reaction unit and the second isomerism depreciation reaction The unit is filled with isomerization depreciation catalyst I, and the catalyst loading volume ratio of the first hydrofinishing reaction unit, the first isomerization depreciation reaction unit, the second hydrofinishing reaction unit and the second isomerization depreciation reaction unit is 2 : 4: 1: 3, see Table 2 for operating conditions. Table 3 shows the changes in hydrocarbon composition in the isomerization depreciation reaction zone, and see Table 4 for the properties of lubricating base oil produc...

Embodiment 2

[0091] In this example, a hydrotreated distillate is used as a raw material, and its properties are shown in Table 6.

[0092] according to figure 1 The process flow processes the raw material. The catalysts are: the first hydrofinishing reaction unit and the second hydrofinishing reaction unit of the isomerism depreciation reaction zone are loaded with hydrofinishing catalyst I, the first isomerism depreciation reaction unit and the second isomerism depreciation reaction The unit is filled with isomerization depreciation catalyst I, and the catalyst loading volume ratio of the first hydrofinishing reaction unit, the first isomerization depreciation reaction unit, the second hydrofinishing reaction unit and the second isomerization depreciation reaction unit is 2 :6:2:3, see Table 7 for operating conditions. Table 8 shows the change of hydrocarbon composition in the isomerization depreciation reaction zone, and the properties of lubricating base oil products separated in the...

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Abstract

The invention relates to the field of oil refining, and discloses a preparing method for high-viscosity-index lubricant base oil. The method comprises the steps that firstly, raw oil and nitrogen-containing material flow are guided into an isomerization-visbreaking reaction area to be subjected to a reaction, and isomerization wax converted oil is obtained, wherein the isomerization-visbreaking reaction area comprises at least two catalyst bed layers sequentially filled with hydrofining catalysts and isomerization-visbreaking catalysts; secondly, the isomerization wax converted oil is guided into a supplementing refining reaction area containing the hydrofining catalysts to be subjected to a reaction, and hydrofined oil is obtained; and thirdly, the hydrofined oil is guided into a separation area to be separated. According to the method, the two sections of hydrofining catalysts are added in the isomerization-visbreaking reaction area, arene, cycloparaffin and polycyclic cycloparaffin in the raw oil are saturated and subjected to proper ring opening, the viscosity index loss in the isomerization-visbreaking process is reduced, and meanwhile the lubricant base oil yield loss caused by the too large cracking depth is avoided.

Description

technical field [0001] The invention relates to the field of oil refining, in particular to a method for preparing lubricating base oil with high viscosity index. Background technique [0002] The method of preparing lubricating oil base oil by adopting a full hydrogenation process is well known in the art, and its process mainly includes: hydrotreating-hydrodewaxing-hydrogenation supplementary refining; most of the hydrotreating process is based on hydrodesulfurization, The purpose of denitrification, deoxygenation and hydrogenation saturation of some aromatics; the purpose of hydrodewaxing is to reduce the pour point and convert the wax molecules in the raw oil, mainly including isomerization dewaxing process and catalytic dewaxing process; The hydrogenation supplementary refining process is to remove the residual sulfur, nitrogen, oxygen and other impurities in the dewaxed oil, and to saturate olefins to improve the stability and color of the oil. [0003] For the produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 李洪辉郭庆洲王鲁强黄卫国李洪宝毕云飞高杰
Owner CHINA PETROLEUM & CHEM CORP
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