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Composite nano diesel oil pour point depressant as well as preparation method and application thereof

A diesel pour point depressant and composite technology, applied in the field of composite nano diesel pour point depressant and its preparation, can solve problems such as single type, and achieve the effects of lowering the condensation point and cold filter point, stable performance and less dosage

Pending Publication Date: 2022-05-13
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing types of diesel pour point depressants are relatively single, and expanding the types of pour point depressants is the focus of continuous research in this field

Method used

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  • Composite nano diesel oil pour point depressant as well as preparation method and application thereof
  • Composite nano diesel oil pour point depressant as well as preparation method and application thereof
  • Composite nano diesel oil pour point depressant as well as preparation method and application thereof

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preparation example Construction

[0026] The invention provides a kind of preparation method of composite nano-diesel pour point depressant, comprising the following steps:

[0027] 1) Add silane coupling agent and nano silicon dioxide with aminopropyl group into solvent A, heat and stir, and obtain nanomaterials through post-treatment, such as figure 1 shown;

[0028] 2) adding the nano material and polyethylene-vinyl acetate into the solvent B, performing melt blending, and separating to obtain a composite nano diesel pour point depressant.

[0029] In step 1), the silane coupling agent is aminopropyl-triethoxysilane, and the solvent A is formed by mixing ethanol and water in a volume ratio (8-10):1. The mass ratio of silane coupling agent to nano silicon dioxide is 1:(2.5-3.5). The temperature of heating and stirring is 70-80° C., and the time is 2.5-3.5 hours; post-treatment includes centrifugation, washing, drying and grinding. The centrifugation temperature is 50-70° C., and the time is 8-12 minutes; ...

Embodiment 1

[0035] A composite nano-diesel pour point depressant for lowering the cold filter point and condensation point of diesel oil, which is made by mixing aminopropyl-triethoxysilane and nano-silica, and then combined with polyethylene vinyl acetate after separation and purification Ester (EVA) copolymer melt blending obtains, and concrete preparation process is as follows:

[0036] 1) Put the single-necked flask into a constant temperature magnetic stirrer, add 45ml of ethanol and 5ml of deionized water into the single-necked flask, mix and stir at room temperature for 1h;

[0037] After the stirring was completed, 2.0 g of aminopropyl-triethoxysilane and 6.0 g of nano-silicon dioxide were put into the ethanol solution, and stirred at 75° C. for 3 h.

[0038] After the reaction, centrifuge the product at 60°C for 10 minutes to completely separate the solution from the nanomaterials, put it in a vacuum oven and dry it at 60°C for 12 hours to remove the remaining small amount of eth...

Embodiment 2

[0046] A composite nano-diesel pour point depressant for lowering the cold filter point and condensation point of diesel oil, which is made by mixing aminopropyl-triethoxysilane and nano-silica, and then combined with polyethylene vinyl acetate after separation and purification Ester (EVA) copolymer melt blending obtains, and concrete preparation process is as follows:

[0047] 1) Put the single-necked flask into a constant temperature magnetic stirrer, add 45ml of ethanol and 5ml of deionized water into the single-necked flask, mix and stir at room temperature for 1h;

[0048] After the stirring was completed, 2.0 g of aminopropyl-triethoxysilane and 6.0 g of nano-silicon dioxide were put into the ethanol solution, and stirred at 75° C. for 3 h.

[0049] After the reaction, centrifuge the product at 60°C for 10 minutes to completely separate the solution from the nanomaterials, put it in a vacuum oven and dry it at 60°C for 12 hours to remove the remaining small amount of eth...

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Abstract

The invention relates to a composite nanometer diesel oil pour point depressant and a preparation method and application thereof.The preparation method comprises the following steps that 1, a silane coupling agent with aminopropyl and nanometer silicon dioxide are added into a solvent A, heating and stirring are conducted, and a nanometer material is obtained after aftertreatment; and 2) adding the nano material and polyethylene-vinyl acetate into a solvent B, carrying out melt blending, and separating to obtain the composite nano diesel oil pour point depressant. Compared with the prior art, the nano silicon dioxide material treated by the silane coupling agent has organic compatibility, and is compounded with the oil-soluble polymer to prepare the composite nano diesel oil pour point depressant, so that the pour point depression effect is effectively enhanced, the low-temperature flowing property of diesel oil is improved, and the application prospect of a nano material in the field of diesel oil pour point depressants is expanded.

Description

technical field [0001] The invention belongs to the technical field of diesel pour point depressant, and relates to a composite nano diesel pour point depressant and its preparation method and application. Background technique [0002] Diesel is a light petroleum product mainly composed of alkanes with long chain carbon numbers, and it has a very wide range of applications in national defense, industry, agriculture, logistics and transportation, and life. However, my country's diesel oil has a high wax content, and it is easy to form wax under low temperature conditions. Wax crystals grow rapidly at low temperatures, and quickly lose low-temperature fluidity, resulting in blockage of fuel pipes or filters in the diesel fuel system. It affects the storage, transportation and use of oil products in cold regions. [0003] The low temperature fluidity of diesel can be significantly enhanced by adding a small amount of pour point depressant. At present, common diesel pour point ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/10C10L1/12C10L1/196
CPCC10L1/106C10L1/1963C10L1/1291
Inventor 韩生孙彬童巧娴任飞鹤赵玉壮卢义麟陈亚莉薛原蔺华林
Owner SHANGHAI INST OF TECH
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