Method for producing lubricant base oil by isomerization dewaxing

A lubricating oil base oil and isomerization dewaxing technology, which is applied in the direction of lubricating compositions, petroleum industry, and hydrocarbon oil treatment, can solve the problems of low yield of isomerization dewaxing raw materials, high conversion rate, etc., and reduce the harshness of operation Degree, the effect of increasing the yield

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of whether hydrocracking or hydrotreating is used to produce isomerized dewaxed feedstock, a high conversion rate is required to achieve such a high viscosity index requirement, resulting in a significant reduction in the yield of isomerized dewaxed feedstock

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0030] The raw materials of Examples 1 to 4 are 4 kinds of lubricating oil base oil raw materials listed in Table 1, and the catalysts are respectively listed in Table 2. The catalysts are reduced by conventional methods and then implemented. The raw material first enters the hydrocracking reaction zone filled with amorphous silica-alumina catalyst, and performs the hydrogenation and ring-opening reaction of cycloalkanes with double rings or above. The reaction effluent directly enters the hydroisomerization dewaxing reaction zone without separation, and is combined with hydrogenation The isomerization dewaxing catalyst is contacted to carry out the isomerization reaction of n-alkanes to obtain the high viscosity index lubricating oil base oil whose pour point meets the requirements. The reaction process conditions and the properties of the obtained base oil product are shown in Table 3.

[0031] Table 1 Properties of raw oil

[0032] Raw oil Hydrocracking tail oil...

Embodiment 5～6

[0044] The lubricating oil base oil raw materials of Examples 1-2 are the same, the difference is that a supplementary hydrofinishing reaction zone is added after the hydroisomerization dewaxing reaction zone, and the properties of the supplementary refining catalyst are shown in Table 2, the reaction process conditions and the obtained base oil product The properties are detailed in Table 5.

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Abstract

The invention relates to a method for producing lubricant base oil by isomerization dewaxing. The method is as follows: raw oil is mixed with hydrogen, then enters into a hydrocracking reaction zone to contact with an amorphous silica alumina-containing noble metal hydrocracking catalyst for reaction, the polycyclic napthene ring-opening reaction is performed, and a reaction effluent, without separation, directly enters into a hydrogenation isomerization dewaxing reaction zone to contact with a hydrogenation isomerization dewaxing catalyst for n-alkane isomerization reaction to obtain high viscosity index lubricant base oil with the pour point meeting the requirements. According to the method, the ring-opening reaction of polycyclic napthenes with two or more than two rings in the raw material is performed, the content of low viscosity index component polycyclic napthenes is reduced, the viscosity index loss in the isomerization dewaxing process is reduced, and the high viscosity index lubricant base oil with the pour point meeting the requirements is obtained.

Description

technical field [0001] The invention relates to a production method of lubricating oil base oil, in particular to a method for producing lubricating oil base oil by hydroisomerization dewaxing. Background technique [0002] The purpose of hydroisomerization dewaxing is to reduce the pour point of raw materials and maintain a high viscosity index by isomerizing normal paraffins into isoparaffins through hydroisomerization dewaxing catalysts. The hydroisomerization dewaxing catalyst needs to match the acidity and hydrogenation / dehydrogenation performance. The acidity is generally provided by the carrier, and the hydrogenation / dehydrogenation activity is provided by the metal component. [0003] At present, there are many reports on isomerization dewaxing catalysts, for example, U.S. patents US5990371, US5833837, US5817907, US5149421, US5135638, US5110445, US4919788, US4419420, US4601993, US4599162, US4518485, etc. all relate to isomerization dewaxing technology catalysts, wher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12C10M177/00
Inventor 全辉张志银赵威林振发
Owner CHINA PETROLEUM & CHEM CORP
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