Preparation method of high-viscosity-index lubricating oil base oil

A lubricating oil base oil, high viscosity technology, applied in lubricating compositions, base materials, processing hydrocarbon oils, etc., can solve the problems of low lubricating oil yield, large loss of product viscosity, difficulty and so on

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For intermediate base stock oils with low wax content, it is very difficult to produce lubricating base oils with a viscosity index > 120 by the above method, which requires deep conversion of raw materials, but often leads to low yield of lubricating oil (usually only 10-20%) or a large loss of product viscosity (viscosity index is usually 50-80%)

Method used

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  • Preparation method of high-viscosity-index lubricating oil base oil
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preparation example Construction

[0022] Such as figure 1 Shown, the preparation method of lubricating base oil provided by the invention may further comprise the steps:

[0023] (1) The raw material is contacted with a dewaxing solvent to remove the wax in the waxy oil to obtain dewaxed oil and oily wax. The conditions of contact are such that the freezing point of the obtained dewaxed oil is -30°C to 5°C. The raw material are vacuum distillates and / or lightly deasphalted oils;

[0024] (2) contacting the above-mentioned dewaxed oil with a hydroprocessing catalyst in the presence of hydrogen to obtain a hydroprocessing product with a sulfur content reduced to not higher than 10 ppm and a nitrogen content reduced to not higher than 2 ppm;

[0025] (3) contacting the oil-containing wax obtained in step (1) with the first hydrorefining catalyst in the presence of hydrogen to obtain the first hydrorefining product whose sulfur content is reduced to not higher than 10 ppm and nitrogen content is reduced to not hi...

Embodiment 1

[0049] This embodiment is used to illustrate the preparation method of the lubricating oil base oil provided by the present invention.

[0050] according to figure 1 The described procedure prepares lube base oils.

[0051](1) With the refinery vacuum distillate oil 1 as raw material (the properties of the vacuum distillate oil 1 are shown in Table 1 below), the above-mentioned raw material is contacted with a dewaxing solvent to remove wax in the waxy oil, and the yields are respectively 70% by weight dewaxed oil and 30% by weight oily wax. Used dewaxing solvent is the mixture of methyl ethyl ketone and toluene, and its volume ratio is 65 / 35, and dewaxing condition is the weight ratio of dewaxing solvent and stock oil 4.4: 1, and cold spot raw material temperature is 36 ℃, and cold spot solvent temperature 32°C, the final cooling temperature and filtration temperature are both 10°C. The properties of the obtained dewaxed oil are shown in Table 2 below.

[0052] (2) The de...

Embodiment 2-3

[0057] This embodiment is used to illustrate the preparation method of the lubricating oil base oil provided by the present invention.

[0058] Prepare lubricating oil base oil according to the method of Example 1, the difference is, the property of raw material oil, the property of dewaxed oil, the condition of hydroprocessing, the property of hydroprocessing product, the property of dewaxed oil and oily wax mixture, The conditions of the first hydrorefining, the properties of the first hydrorefining products, the conditions of hydrocatalytic isomerization / second hydrorefining, and the properties of the second hydrorefining products are respectively shown in Table 1-9 below. The properties of the oil products are shown in Table 10 below. The yields of the lubricating base oil products relative to the raw materials used in step (1) were 68% by weight and 65% by weight, respectively.

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Abstract

The invention relates to a preparation method of high-viscosity-index lubricating oil base oil, which is characterized by comprising the following steps of, firstly, contacting raw materials with to a dewaxing solvent to obtain dewaxed oil and oil-bearing wax, wherein the raw materials are vacuum gas oil and/or light deasphalting oil; secondly, contacting the dewaxed oil with a hydrotreating catalyst in the presence of hydrogen to obtain a hydrotreating product; thirdly, contacting the oil-bearing wax with a first hydrofining catalyst in the presence of the hydrogen to obtain a first hydrofining product; fourthly, mixing the first hydrofining product and the hydrotreating product, and sequentially contacting the mixture to a hydroisomerization catalyst and a second hydrofining catalyst in the presence of the hydrogen to obtain a second hydrofining product; and fifthly, cutting the second hydrofining product to obtain a lubricating oil base oil product. In the preparation method of the lubricating oil base oil, intermediate base raw materials with low wax content can be adopted to produce the lubricating oil base oil which has the viscosity index up to above 120 and the high yield of 60-70 percent.

Description

technical field [0001] The invention relates to a preparation method of high viscosity index lubricating oil base oil. Background technique [0002] Due to the upgrading of engine oil, the requirements for the viscosity index, evaporation loss and low temperature pumping performance of lubricating base oil are becoming more and more stringent. High-grade lubricating oil requires its base oil to have better viscosity-temperature performance, lower evaporation loss, more excellent oxidation stability and low-temperature fluidity. [0003] Viscosity index is an indicator of the viscosity of lubricating base oil changing with temperature. It is a value calculated by standard method through the kinematic viscosity of base oil at 40°C and 100°C. It is used to indicate the change of base oil viscosity with temperature. Performance, that is, viscosity-temperature performance. The viscosity index of lubricating base oil produced with mineral oil is usually between 0 and 150. The la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00C10M101/02
Inventor 王鲁强郭庆洲王轶凡黄卫国夏国富
Owner CHINA PETROLEUM & CHEM CORP
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