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A method for refining lubricating oil that can effectively reduce the acid value of base oil

A technology of lubricating oil material and refining method, which is applied in refining hydrocarbon oil, petroleum industry and other directions, can solve the problems of increasing environmental pollution, increasing production cost, consumption of white clay, etc., and achieves the effect of simple and feasible process, saving production cost and good filtration performance.

Active Publication Date: 2015-10-28
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although acid clay can effectively remove a small amount of colloids, asphaltene, nitrides, trace solvents, and moisture remaining in various lubricating base oils, it cannot effectively remove acidic substances with high acid values. The acid value exceeds the standard, which leads to the downgrading of oil products and the loss of economic benefits
If the base oil with an acid value exceeding the standard is circulated back to the device and then refined with clay, even if the acid value reaches the standard, it will consume double the clay, increase the production cost, and increase the discharge of clay waste residue, which will increase environmental pollution and is not conducive to environmental protection.

Method used

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  • A method for refining lubricating oil that can effectively reduce the acid value of base oil
  • A method for refining lubricating oil that can effectively reduce the acid value of base oil
  • A method for refining lubricating oil that can effectively reduce the acid value of base oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Mixture of oilseed and mixed clay : 7000 kg of HVIIa 150 dewaxed oil is pumped to the mixing tank through the raw material, and the mixed clay composed of acid clay and alkaline clay is added while stirring. The mass ratio of mixed clay to dewaxed oil is 2% (m / m), The proportion of alkaline clay in the mixed clay was 20%, and then stirred and mixed for 30 minutes to obtain the oil-soil mixture.

[0039] (2) heating: The oil-soil mixture is sent to the heating furnace for heating or heat exchange to 155°C.

[0040] (3) Refining reaction: Transport the oil-soil mixture treated in the step (2) to the refining tower and let it stand for 30-40 minutes; let the clay and the dewaxed oil fully contact for a certain period of time to promote the impurity molecules in the oil to completely diffuse into the acidic Clay and alkaline clay active surfaces.

[0041] (4) filter: The refined oil-soil mixture is sent to a filter for filtration treatment to obtain lubricating ...

Embodiment 2

[0045] (1) Mixture of oilseed and mixed clay : 5000 kg of HVIIa 400 dewaxed oil is pumped to the mixing tank through the raw material, and the mixed clay composed of acid clay and alkaline clay is added while stirring. The mass ratio of mixed clay to dewaxed oil is 3% (m / m), The proportion of alkaline clay in the mixed clay is 50%, and then stirred and mixed for 35 minutes to obtain the oil-soil mixture.

[0046] (2) Heating: Transport the oil-soil mixture to a heating furnace for heating or heat exchange to 160°C.

[0047] (3) Refining: transport the oil-soil mixture to the refining tower after the step (2) and let it stand for 30 to 40 minutes, allowing acid clay, alkaline clay and dewaxed oil to fully contact for a certain period of time to promote The impurity molecules in the oil completely diffuse to the active surface of acid clay and alkaline clay.

[0048] (4) Filtration: The refined oil-soil mixture is sent to a filter for filtration treatment to obtain lubricati...

Embodiment 3

[0052] (1) Mixture of oilseed and mixed clay : 4000 kg of HVIIb 400 dewaxed oil is pumped to the mixing tank through the raw material, and the mixed clay composed of acid clay and alkaline clay is added while stirring. The mass ratio of mixed clay to dewaxed oil is 4% (m / m), The proportion of alkaline clay in the mixed clay was 10%, and then stirred and mixed for 35 minutes to obtain the oil-soil mixture.

[0053] (2) Heating: Transport the oil-soil mixture to a heating furnace for heating or heat exchange to 165°C.

[0054] (3) Refining: transport the oil-soil mixture to the refining tower after the step (2) and let it stand for 30 to 40 minutes, allowing acid clay, alkaline clay and dewaxed oil to fully contact for a certain period of time to promote The impurity molecules in the oil completely diffuse to the active surface of acid clay and alkaline clay.

[0055] (4) Filtration: The refined oil-soil mixture is sent to a filter for filtration treatment to obtain lubricat...

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Abstract

The invention discloses a lubricating oil material refining method which can effectively reduce the acid value of base oil. The lubricating oil material and mixed clay composed of acid clay and alkaline clay are uniformly mixed in a mixing tank, then refined and filtered to obtain lubricating oil base oil. The method can make the lubricating oil stock with higher acid value obtain the base oil of the lubricating oil whose acid value meets the index requirement. In the whole refining process, there is no need to repeatedly refine the white clay, so the consumption of white clay is small and the cost is low.

Description

technical field [0001] The invention relates to a lubricating oil refining method, in particular to a lubricating oil refining method which can effectively reduce the acid value of base oil. Background technique [0002] Most domestic lubricating oil production adopts the "old three sets" of furfural refining, solvent dewaxing and clay refining to produce API HVI Ⅰ base oil. Among them, the refining of white clay is to use the adsorption capacity of white clay to remove a small amount of gum, asphaltene, nitride, unsaturated hydrocarbon, sulfide, organic acid and trace solvent, water, colored Substances and other impurities are adsorbed on it and removed to improve the oxidation stability and color of the oil. It is to make the mechanical impurities, moisture, acid value, anti-emulsification performance, oxidation stability and other physical and chemical indicators of various base oils meet the specifications. important means of request. [0003] The traditional white cla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G25/00
Inventor 谭思刘跃委骆新平陈新哲卢振旭杨海兰任风允李洁郑镇昭
Owner CHINA PETROLEUM & CHEM CORP
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