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Method for processing high-wax-content lubricant base oil

A lubricating oil base oil and content technology, which is applied in the direction of lubricating composition, hydrotreating process, base material, etc., can solve the problem of difficult isomerization of macromolecular macromolecular wax, low yield of reaction selective base oil, Low selectivity and other issues, to achieve the effect of low product pour point, high yield and simple overall process

Inactive Publication Date: 2017-04-19
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above patents adopt different processes and different catalysts to treat Fischer-Tropsch wax and other lubricating oil base oil raw materials with high wax content, and propose effective methods for how to effectively use Fischer-Tropsch wax, but there are macromolecular macromolecular wax isomerization Difficult, low selectivity, low reaction selectivity and low yield of base oil

Method used

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  • Method for processing high-wax-content lubricant base oil
  • Method for processing high-wax-content lubricant base oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Synthesis of ZSM-22 molecular sieve

[0023] The ZSM-22 molecular sieve was synthesized according to the patent US4556477. 1) 28.6g silica sol (30wt% SiO 2 ) and 29.8g deionized water are mixed evenly; 2) 1g aluminum sulfate (17.2wt%Al 2 o 3 ), 2.3g of potassium hydroxide and 52.3g of deionized water were mixed evenly; 3) 1) and 2) were mixed and stirred for 15 minutes, then 5g of hexamethylenediamine was added to the mixed solution and stirred; 4) 3) was mixed with Put it into a stirred high-pressure reactor, heat to 160°C, stir and react for 72h; 5) After washing and filtering, the filter cake is dried at 110°C for 10h to obtain SiO 2 / Al 2 o 3 ZSM-22 molecular sieve raw powder with a molar ratio of about 60.

[0024] (2) Molecular sieve modification:

[0025] 1) Roast ZSM-22 raw powder at 600°C for 6h; 2) Use 0.3mol / L NH 4 NO 3 The aqueous solution performs ion exchange on the molecular sieve. The exchange conditions are: the mass ratio of solid to liqu...

Embodiment 2

[0027] (1) Synthesis of ZSM-23

[0028] The synthesis of ZSM-23 is according to the disclosed method of U.S. Patent US4076842: 1) 3.3g sodium metaaluminate (43.1wt%Al 2 o 3 , 33.1 wt% Na 2 O and 24.7 wt% H 2 0), 30g deionized water and 0.34gNaOH (50wt% aqueous solution) mix, stir well, then add 18.2g pyrrolidine and continue to stir; 2) 164.8g silica sol (30% SiO 2 ,70%H 2 0) Add the above solution and stir until a gel is formed; 3) Heat and stir the above gel in an autoclave, and continuously crystallize it at 180°C for 7 days; 4) Wash and filter the product until the filtrate is medium properties, the filter cake was dried at 110°C for about 16 hours to obtain SiO 2 / Al 2 o 3 ZSM-23 molecular sieve raw powder with a molar ratio of about 60.

[0029] (2) Molecular sieve modification method According to the method of Example 1, H-ZSM-23 was obtained.

Embodiment 3

[0031] Composite molecular sieve ZM synthesis

[0032]Weigh 16g cetyltrimethylammonium bromide (CTAB), add 777g deionized water, stir until dissolved, then add 33.3g silica sol (30% SiO 2 , 70%H 2 O), 1.25g aluminum sulfate, 40g ZSM-23 molecular sieve powder, mix evenly, finally add a certain amount of NaOH to adjust the pH of the solution to 10-11, and continue to stir for 2h. The reaction liquid was put into a crystallization kettle, and crystallized at 120°C for 24 hours; the reaction product was cooled, washed, and dried to obtain a composite molecular sieve powder ZM. The mesoporous MCM-41 molecular sieve accounts for about 20 wt% of the composite molecular sieve.

[0033] Take 100g of composite molecular sieve ZM into a 2L beaker, add 1L of deionized water, and then add 24g of NH 4 NO 3 , stirred and heated to 90°C for 4 hours; then filtered, washed with water until neutral, dried at 120°C for 2 hours, and then calcined at 550°C for 4 hours to obtain H-ZM.

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Abstract

The invention relates to a method for processing high-wax-content lubricant base oil. According to the method, a wax-containing mixed oil raw material with the wax content not smaller than 50 wt% and hydrogen are mixed to enter a hydroisomerization reactor, and the mixture firstly passes through a first bed layer containing mesoporous-micropore composite molecular sieve based catalysts to be subjected to primary hydroisomerization; then, the mixture passes through a second bed layer containing ten-membered ring one-dimension duct molecular sieve based catalysts to be subjected to deep hydroisomerization; a reaction product enters a supplement refined reactor to react with a noble metal catalyst, the arene deep saturation reaction is conducted, and the oil color degree and oxidation stability are improved; and then the product is subjected to fractional distillation, and light lubricant and heavy lubricant base oil are obtained. By means of the method, the high-wax raw materials can be subjected to sufficient hydroisomerization, and the method has the beneficial effects that the product pour point is low, and the base oil yield is high.

Description

technical field [0001] The invention relates to a method for processing lubricating base oil with high wax content, belonging to the field of lubricating base oil processing. Background technique [0002] Fischer-Tropsch wax is a heavy product of Fischer-Tropsch synthesis. It has low content of impurities such as S and N, and high viscosity. It is a good raw material for producing high-quality lubricating base oil. In recent years, with the continuous promotion of Fischer-Tropsch synthesis technology, the comprehensive utilization of Fischer-Tropsch wax has also attracted people's attention. [0003] U.S. Patent US2004 / 0065584A1 and European Patent WO2004 / 033595A1 have introduced the process of preparing heavy lubricating oil base oil by using Fischer-Tropsch synthesized hydrocarbons as raw materials and undergoing multi-step hydrogenation. The dewaxing catalyst is composed of ZSM-48 (including EU-2 , EU-11, ZBM-30 and other molecular sieves with the same structure) and a h...

Claims

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Application Information

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IPC IPC(8): C10M105/04C10M177/00C10G45/64C10G65/08
CPCC10M105/04C10G45/64C10G65/08C10G2400/10C10M177/00
Inventor 孙国方李孝国于海斌刘有鹏郑修新高鹏赵甲费亚南臧甲忠李佳隋芝宇张永惠
Owner CHINA NAT OFFSHORE OIL CORP
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