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Method for reducing neutralization value of base oil

A technology of base oil and deacidification agent, applied in the direction of refining with solid alkaline materials, etc., can solve the problems of metal corrosion, high neutralization value of base oil, affecting the performance index of base oil, etc.

Active Publication Date: 2013-08-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the neutralization value of the base oil is relatively high due to acid-containing crude oil in the prior art, and the use of general alkaline deacidification agents will also cause metal corrosion while reducing the neutralization value And the problems that affect other performance indicators of base oil, provide a new method to reduce the neutralization value of base oil

Method used

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  • Method for reducing neutralization value of base oil

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Effect test

Embodiment 1

[0017] The Oman 500 refined oil with a neutralization value of 0.28 is fully mixed with a deacidification agent, and a base oil with a low neutralization value is obtained after filtration. In parts by weight, the deacidification agent is composed of 10 parts of magnesium aluminum silicate and 90 parts of clay. The contact temperature between base oil and deacidifier is 160°C, and the contact time is 1 hour. The consumption of deacidifying agent is 5.0% of base oil weight. The neutralization value of the base oil was reduced from 0.28 mg KOH / g to 0.04 mg KOH / g. The deacidifier does not cause metal corrosion, and has no adverse effect on the anti-emulsification performance, oxidation resistance, viscosity-temperature performance and metal content of the base oil.

Embodiment 2～9

[0019] The raw materials of base oil, the composition of deacidifying agent, the contact temperature and time of base oil and deacidifying agent, and the amount of deacidifying agent were changed. See Table 1 for details. The deacidifier does not cause metal corrosion, and has no adverse effect on the anti-emulsification performance, oxidation resistance, viscosity-temperature performance and metal content of the base oil.

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Abstract

The invention relates to a method for reducing a neutralization value of base oil, which mainly solves the problems that the neutralization value of base oil is high due to acidic crude oil and that metal corrosion is caused and other performance indexes of the base oil are influenced in the process of reducing the neutralization value by using a common alkaline deacidification agent in the priorart. The method for reducing the neutralization value of the base oil comprises the steps of: mixing the base oil and the deacidification agent; and filtering and refining to obtain low-neutralization value base oil, wherein the used deacidification agent comprises the following components in part by weight: a) 0.01 to 15 parts of at least one of magnesium silicate and magnesium aluminum silicate; and b) 0 to 96 parts of clay; and the quality index of the low-neutralization value base oil is that: for the base oil with the neutralization value of 250 or below, the quality index of the neutralization value is less than 0.03mg of KOH per gram; and for the base oil with the neutralization value of 500 or more, the quality index of the neutralization value is less than 0.05mg of KOH per gram.The technical scheme better solves the problems, and can be used for industrial production for reducing the neutralization value of the base oil.

Description

technical field [0001] The invention relates to a method for reducing the neutralization value of base oil. Background technique [0002] Neutralization value (or acid value) is an important property index of lubricating oil base oil. For base oils of 250 and below, the quality index of neutralization value is <0.03 mg KOH / g; for base oils of 500 and above, the quality index of neutralization value is <0.05 mg KOH / g. [0003] In recent years, with the rapid expansion of crude oil demand in my country, the sources of crude oil have become increasingly diversified, and the proportion of high acid value crude oil has gradually increased, resulting in a decline in the quality of refining raw materials, among which the problem of excessive acid value has become increasingly prominent. For existing refineries, this also increases the acid value of component oils, especially lubricating oils. The existence of petroleum acid in lubricating oil base oil seriously affects the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G19/073
Inventor 陈英潘草原林荣兴金维新赵良裘峰范文琴陶文晟张俊玲
Owner CHINA PETROLEUM & CHEM CORP