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Method for deep hydrofinishing of lubricant base oil

A lubricating oil base oil, supplementary refining technology, applied in chemical instruments and methods, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of unqualified base oil light stability, achieve excellent light stability, high oxidation stability, Effect of Good Aromatic Saturation Performance

Active Publication Date: 2014-07-02
PETROCHINA CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of lubricating base oil hydrotreating and isomerization dewaxing reaction, due to the high operating temperature of the hydrogenation process (generally 340-400°C), although it is operated under high pressure, it is limited by thermodynamic equilibrium. In particular, polycyclic aromatic hydrocarbons cannot be fully saturated, and even a small amount of condensed ring aromatic hydrocarbons with as many as 4 to 7 rings are produced, so that the base oil produced by hydrogenation is usually unqualified for light stability, and at the same time, the type II / III base oil is not suitable for light stability. The requirements for color and color are very high, so hydrogenation supplementary refining is an essential post-treatment step in the lubricating oil hydrogenation process. Its main purpose is to hydrogenate unsaturated olefins and polycyclic aromatic hydrocarbons in saturated base oils to change their chemical composition. Chemically increase the stability of the base oil to improve the oxidation stability, light stability and color of the oil

Method used

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  • Method for deep hydrofinishing of lubricant base oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix the modified γ-alumina carrier powder, additives and water according to the weight ratio of 1:0.15:1, extrude into a clover shape with a diameter of 1.5mm on an extruder, dry at 120°C for 4 hours, and roast at 480°C for 4 hours. A catalyst carrier is obtained. The impregnation solution was prepared according to the platinum content of the catalyst at 0.5 wt.%, and the impregnation method was used to uniformly infiltrate the catalyst carrier, dried at 120°C for 4 hours, and calcined at 480°C for 4 hours to obtain the catalyst. Catalyst properties are listed in Table 1.

[0018] The prepared catalyst is evaluated with real raw materials on the hydrogenation evaluation device. The catalyst needs to be pretreated before use. Pretreatment conditions: pressure 0.1~0.5MPa, temperature 450°C, residence time 4h, hydrogen flow rate 65ml / g min. Catalyst reaction conditions: reaction pressure 12.0MPa, reaction temperature 200°C, volume space velocity 2.0h -1 , The volume rati...

Embodiment 2

[0020] The modified γ-alumina carrier powder in Example 1 was replaced with a mixed powder of modified γ-alumina and modified amorphous silica-alumina with a weight ratio of alumina and silica of 1.8:1, and the others were the same as in the examples 1. The catalyst properties are shown in Table 1, and the evaluation results are shown in Table 2.

Embodiment 3

[0022] In embodiment 2, catalyst metal content is changed to platinum content 0.20wt.%, and palladium content 0.05wt.% prepares impregnation solution, and reaction temperature is changed into 220 ℃, and others are all the same as embodiment 2. The catalyst properties are shown in Table 1, and the evaluation results are shown in Table 2.

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Abstract

The invention relates to a method for deep hydrofinishing of lubricant base oil. Based on the base oil produced by adopting a hydrogenation process, or using the base oil isodewaxed by hydrogenation as a raw material, the lubricant base oil with light and heat stability is produced. A catalyst comprises the following components in percent by weight: 40.0-99.9 percent of aluminum oxide, 0.0-60.0 percent of silicon oxide, and 0.1-1.0 percent of platinum and / or palladium; the aluminum oxide is selected from modified gamma-aluminum oxide and modified amorphous silica and alumina, the silicon oxide is selected from amorphous silica and alumina, platinum is selected from one or more of chloroplatinic acid, potassium chloroplatinate, ammonium chloroplatinate and sodium chloroplatinate, and palladium is selected from one or more of palladium chloride, palladium sulfate, ammonium tetrachloropalladate and potassium chloropalladite. According to the method, through deep hydrofinishing of the base oil produced by using a hydrogenation process, or aromatic hydrocarbon and olefin in the lubricant base oil isodewaxed by hydrogenation, the oxidation stability and light stability of a product are improved, the color of an oil product is improved, and the pour point of the product is not increased.

Description

technical field [0001] The invention relates to a method for deep hydrogenation supplementary refining of lubricating oil base oil. Background technique [0002] In recent years, with the rapid development of the automobile industry, the demand for high-grade lubricating oil has been increasing, and its quality requirements have become higher and higher. oil demand. my country is the second largest lubricating oil consumer in the world. It is estimated that there are more than 4,000 domestic lubricating oil factories, large and small, with more than 6,000 brands, including nearly 30 foreign-funded companies. The consumption and supply of lubricating oil are 4.5-6 million tons per year. between. Among them, Sinopec and PetroChina occupy nearly 60% of the market share; multinational lubricant companies represented by Shell, Mobil, BP and Castrol occupy about 20% of the market, but occupy 80% of the high-end market. At present, most oil refineries in my country still use the ...

Claims

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Application Information

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IPC IPC(8): C10G49/06C10G49/08B01J23/42B01J23/44B01J29/068
Inventor 刘彦峰田志坚王磊胡胜张志华田然郭金涛马怀军孟祥彬徐仁顺谭明伟曲炜王新苗王炳春高善彬李鹏朱金玲靳丽丽董志强
Owner PETROCHINA CO LTD
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