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Preparation method of hydraulic oil additive for coal-to-liquids (CTL) base oil

A base oil and additive technology, applied in the fields of additives, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of poor high temperature resistance, large evaporation loss, reduced viscosity, etc. High viscosity index and small viscosity loss

Inactive Publication Date: 2021-09-28
山西潞安太行润滑科技股份有限公司
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  • Description
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Problems solved by technology

[0003] In the prior art, the low-viscosity base oil has a light fraction, so the flash point is low, the evaporation loss is large, and the high-temperature performance is not ideal. In addition, the high-molecular-weight viscosity index improver is sheared and degraded during long-term use, making the viscosity smaller. In addition, the base oil has poor oxidation resistance at high temperature and is prone to oxidative decay. The above two factors lead to shortened oil change intervals
In summary, the current main method for increasing the viscosity index of hydraulic oil is to rely on viscosity index improvers or a large amount of poly-a-olefin synthetic oil. The oil prepared by the above method has poor shear resistance and high temperature resistance, which leads to short oil life.

Method used

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  • Preparation method of hydraulic oil additive for coal-to-liquids (CTL) base oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1 , a preparation method for hydraulic oil additives aimed at coal-based CTL base oil, comprising the following steps:

[0031] S1. Pretreat the coal raw material and put it into the gasifier;

[0032] S2. Carry out gasification treatment on the coal based on the coal gasifier to obtain the preliminary coal-based CTL base oil raw material;

[0033] S3. Two processing methods of hydrofining and hydrodewaxing treatment for the preliminary coal-to-CTL base oil raw material;

[0034] S4. After the above processing method is completed, supplementary hydrogenation treatment is performed on the preliminary coal-based CTL base oil raw material to obtain the coal-based CTL base oil;

[0035] S5. Divide the obtained coal-based CTL base oils into two groups in equal amounts, and add different proportions of polymer additives to each group of coal-based CTL base oils to obtain two groups of coal-based CTL base oils with different viscosities;

[0036] S6. Mixing and s...

Embodiment 2

[0051] A preparation method for hydraulic oil additives aimed at coal CTL base oil, comprising the following steps:

[0052] S1. Pretreatment of coal raw materials. Pretreatment of coal raw materials includes impurity removal treatment of coal raw materials to prevent impurities from affecting the gasification process of coal raw materials, and put them into the gasifier;

[0053] S2. Carry out gasification treatment on the coal based on the coal gasifier to obtain the preliminary coal-based CTL base oil raw material;

[0054] S3. Hydrofining and hydrodewaxing are two treatment methods for the preliminary coal-based CTL base oil raw materials. During hydrodewaxing, the dewaxing solvent is methyl ethyl ketone-toluene (6:4). During hydrogen dewaxing treatment, the reaction temperature is 200-250°C, the reaction pressure is 10-18MPa, the volume ratio of hydrogen to oil is 700-1000, and the space velocity is 0.8-1.5. After hydrofining and hydrodewaxing, the freezing point of coal...

Embodiment 3

[0063] A preparation method for hydraulic oil additives aimed at coal CTL base oil, comprising the following steps:

[0064] S1. Pretreatment of coal raw materials. Pretreatment of coal raw materials includes impurity removal treatment of coal raw materials to prevent impurities from affecting the gasification process of coal raw materials, and put them into the gasifier;

[0065] S2. Carry out gasification treatment on the coal based on the coal gasifier to obtain the preliminary coal-based CTL base oil raw material;

[0066] S3. Hydrofining and hydrodewaxing are two treatment methods for the preliminary coal-based CTL base oil raw materials. During hydrodewaxing, the dewaxing solvent is methyl ethyl ketone-toluene (6:4). During hydrogen dewaxing treatment, the reaction temperature is 220-240°C, the reaction pressure is 12-15MPa, the volume ratio of hydrogen to oil is 700-1000, and the space velocity is 0.8-1.5. After hydrodewaxing and hydrofining, the freezing point of coal...

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Abstract

The invention discloses a preparation method of a hydraulic oil additive for CTL base oil, belonging to the technical field of hydraulic oil additive processing. The preparation method comprises the following steps: S1, pretreating a coal raw material, and putting the pretreated coal raw material into a gas producer; S2, carrying out gasification treatment on the coal raw material based on a gas generator to obtain a primary CTL base oil raw material; S3, carrying out both hydrofining treatment and hydrodewaxing treatment on the primary CTL base oil raw material; and S4, carrying out supplementary hydrotreatment on the primary CTL base oil raw material. According to the preparation method for the hydraulic oil additive aiming at the CTL base oil, CTL base oils with different viscosities is mixed, so the viscosity index of an oil product used for the hydraulic oil additive is improved, and the viscosity loss of the oil product of the hydraulic oil during long-time shearing is relatively small; and a small amount of additives such as an antioxidant and the like are supplemented, so the oxidation resistance, heat resistance and other properties of the oil product are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of processing hydraulic oil additives, in particular to a preparation method for hydraulic oil additives aimed at coal-based CTL base oil. Background technique [0002] With the development of the automobile industry and environmental protection, higher requirements are placed on the quality of hydraulic oil products, which require high-grade hydraulic oil with excellent viscosity-temperature performance, good low-temperature fluidity and low cloud point. Base oil is one of the main additives of hydraulic oil, and high-grade hydraulic oil base oil is mainly obtained by hydroisomerization dewaxing. Coal-based CTL base oil is the main component of an ultra-clean hydraulic oil with high environmental protection. [0003] In the prior art, the low-viscosity base oil has a light fraction, so the flash point is low, the evaporation loss is large, and the high-temperature performance is not ideal. In addition, the...

Claims

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Application Information

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IPC IPC(8): C10M167/00C10J3/02C10G65/04C10M159/02C10N40/08C10N30/10C10N30/08C10N30/02
CPCC10M167/00C10J3/02C10G65/04C10M159/02C10M2207/027C10M2207/281C10M2223/04C10M2205/06C10M2209/084C10M2219/066C10M2215/064C10M2227/06C10M2219/022C10M2223/047C10M2219/044C10M2207/288C10M2215/223C10M2203/10C10N2030/02C10N2030/10C10N2030/08C10N2040/08C10N2010/04
Inventor 路捷杜国恩刘恒贾晋虹常晓峰武李玲赵润红
Owner 山西潞安太行润滑科技股份有限公司
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