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Production method of bright stock with low pour point and high viscosity

A production method and high-viscosity technology, used in hydrocarbon oil treatment products, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of high pour point, poor photothermal stability, high content of sulfur nitrogen and aromatic hydrocarbons

Active Publication Date: 2015-03-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Fan Huiming and others reported the first set of 300,000 tons / year lubricating oil of Karamay Petrochemical Company in "Summary of Operation of 300,000 tons / year Lubricant Oil High Pressure Hydrogenation Unit" (Papers of the Fifth Hydrogenation Annual Conference, 2003, 225-235). The high-pressure hydrogenation unit adopts the high-pressure hydrotreating-catalytic dewaxing-hydrogenation post-refining process of the Sinopec Research Institute of Petrochemical Sciences (RIPP) (see the process flow chart image 3 ), using naphthenic propane deasphalted oil (DAO) as a raw material to produce bright stock, the operating data of industrial production equipment shows: 150BS bright stock pour point + 3 ℃, viscosity 32.57mm at 100 ℃ 2 / s, Saybolt color +20, sulfur content 29.6μg / g, nitrogen content 5.7μg / g, aromatics content 7.49% by weight, high pour point of the target product, poor light and heat stability, high content of sulfur nitrogen and aromatics shortcoming

Method used

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  • Production method of bright stock with low pour point and high viscosity
  • Production method of bright stock with low pour point and high viscosity
  • Production method of bright stock with low pour point and high viscosity

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preparation example Construction

[0037] The preparation method of hydrogenation supplementary refining catalyst: the amorphous silicon-alumina carrier is prepared by using the method of co-current fixed pH value and silicon-aluminum co-precipitation. After the carrier is dried and roasted, it is extruded into a clover-shaped strip. After drying and roasting, the precious metal Pt is loaded by impregnation method, and then dried and roasted to prepare a hydrogenation supplementary refining catalyst. The content of Pt is 0.5% by weight, and the rest is no Shaped silica-alumina carrier with a specific surface area of ​​303m 2 / g, the average pore volume is 1.06ml / g.

[0038] The isomerization dewaxing catalyst and supplementary refining catalyst need to be pre-reduced before use. The reduction conditions are: the catalyst is crushed into particles with a length of 2mm-4mm, loaded on a 200ml high-pressure hydrogenation reaction test device, and the hydrogen flow rate is 2000ml / h. 2 hours at 5°C / min, then raised ...

Embodiment 1

[0041] Example 1 Hydrogenation Pre-refining-Isomerization Dewaxing-Hydrogenation Supplementary Refining Process

[0042] according to Figure 4 The shown hydrogenation pre-refining-isomerization dewaxing-hydrogenation supplementary refining process produces bright stock. The test equipment and the properties of the raw oil are the same as those of Comparative Example 1. The process conditions are shown in Table 2.

[0043] The product distribution of embodiment 1 and comparative example 1 is shown in table 3, and the main product properties are shown in table 4.

[0044] It can be seen from Tables 1 to 4 that the bright stock obtained in Comparative Example 1 and Example 1 can meet the quality requirements of high-pressure hydrogenated white 150BS bright stock. However, compared with Comparative Example 1, the operating conditions of Example 1 are more moderate, the yield of bright stock is 17.8 percentage points higher, the total yield of base oil is 16.3 percentage points h...

Embodiment 2

[0057] According to the technical process selected in Example 1, select the same catalyst, experimental device and feedstock oil as in Example 1, the hydrogenation pre-refining and hydrogenation supplementary refining process conditions are the same as in Example 1, and the hydroisomerization dewaxing process conditions See Table 5 for details, and Table 6 for main product properties.

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Abstract

The invention relates to a production method of a bright stock with low pour point and high viscosity. Naphthenic light deasphalted oil (pour point greater than or equal to 0 DEG C and 100 DEG C kinematic viscosity greater than or equal to 60 mm<2> / s) is used as a raw material, hydroisomerization technology is employed to isomerize the alkane molecules with high pour point in crude oil or cycloalkane with long side chain alkane into branched alkane with low pour point or cycloalkane with branched alkanes, and lubricating oil fraction in the crude oil is maintained, so as to reach the purposes of yield increase of bright stock with low pour point ( no more than -18 DEG C) and high viscosity (100 DEG C kinematic viscosity no less than 28 mm<2> / s) and combined production of high-quality naphtha and cleaning intermediate distillate oil. The invention has the characteristics of flexible device operation, high yield of bright stock, low pour point, high viscosity and high viscosity index.

Description

Technical field: [0001] The invention relates to a low pour point (pour point≤-18°C), high viscosity (100°C kinematic viscosity≥28mm 2 / s) Bright stock production method. Background technique: [0002] Bright stock is a high-viscosity lubricating base oil, which is widely used in the production of marine engine oil, single-grade and high-grade multi-grade engine oil, internal combustion engine oil, heavy-duty gear oil and various greases. Bright oil is divided into 90BS, 120BS and 150BS, among which the kinematic viscosity range of 90BS bright oil at 100°C is 17-22mm 2 / s, the 100℃ kinematic viscosity range of 120BS bright oil is 22~28mm 2 / s, the 100℃ kinematic viscosity range of 150BS bright oil is 28~34mm 2 / s, the bright oil with higher kinematic viscosity has a wider range of applications. [0003] The traditional bright stock production process is: vacuum residue is deasphalted with propane to obtain a light deasphalted oil, and the light deasphalted oil is then su...

Claims

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Application Information

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IPC IPC(8): C10G67/14
CPCC10G67/14C10G2400/10
Inventor 迟克彬田志坚胡胜王炳春沈宜泓马怀军罗琛曲炜王春燕李鹏马晨菲曹青高林波阎立军
Owner PETROCHINA CO LTD
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