Compound diesel oil pour point depressant and preparation method and application thereof

A diesel pour point depressant and mixed solution technology, which is applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve the problems of poor low-temperature fluidity of diesel oil and unsatisfactory pour point depressing effect, and achieve enhanced pour point depressing effect , improve pour point depressing effect, simple and easy preparation method

Inactive Publication Date: 2019-11-12
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of poor low-temperature fluidity of diesel has been restricting its development, and this conflict has aroused people's strong attention
Its formula only uses conventional pour point depressants and esters for mixing and compounding, but it does not fundamentally change the problem of poor dispersion of existing pour point depressant products in diesel oil, and the final pour point depressant effect is not ideal

Method used

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  • Compound diesel oil pour point depressant and preparation method and application thereof
  • Compound diesel oil pour point depressant and preparation method and application thereof
  • Compound diesel oil pour point depressant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The measurement method of cold filter point in the present invention is carried out according to "SH / T0248-2006 Determination method of cold filter point of diesel oil and civil heating oil", and the measurement method of condensation point is carried out according to "GB510-83 Determination of freezing point of petroleum products".

[0027] Raw materials used in the following examples:

[0028]

[0029] The preparation method of polybenzyl methacrylate-tetradecyl methacrylate used in this example and other examples is: mix 0.02mol maleic anhydride and 0.02mol myristyl methacrylate, add 25mL solvent toluene, 0.0685 g of initiator benzoyl peroxide was added, and the reaction was carried out at 120° C. for 8 hours to obtain polytetradecyl methacrylate-maleic anhydride. The molecular Mw of the polymer tested by GPC is 54623g / mol, Mn is 21326g / mol, and Mw / Mn is 2.561, and the product benzyl methacrylate-tetradecyl methacrylate is characterized by NMR as figure 1 shown. ...

Embodiment 2

[0036] Composite diesel pour point depressant in the present embodiment, it is made up of following mass percent components:

[0037]

[0038] The preparation method of the above-mentioned composite diesel oil pour point depressant is: mixing and stirring polytetradecyl methacrylate-maleic anhydride, methyl acetate, ethyl acetate, triethylamine and dicyclohexylamine in proportion at a temperature of 25°C Evenly, ultrasonically disperse for 15 minutes to obtain a composite diesel pour point depressant.

[0039] The application of the above-mentioned composite diesel pour point depressant in diesel fuel pour point depressant, the ratio of composite diesel pour point depressant:diesel, calculated by mass ratio, is preferably 1:200, and the composite diesel pour point depressant is added to diesel at a temperature of 40°C After mixing and stirring evenly, ultrasonically disperse for 25 minutes to obtain diesel oil containing the composite diesel pour point depressant.

[0040]...

Embodiment 3

[0042] Composite diesel pour point depressant in the present embodiment, it is made up of following mass percent components:

[0043]

[0044] The preparation method of the above-mentioned composite diesel oil pour point depressant is: mixing and stirring polytetradecyl methacrylate-maleic anhydride, methyl acetate, ethyl acetate, triethylamine and dicyclohexylamine in proportion at a temperature of 25°C Evenly, ultrasonically disperse for 15 minutes to obtain acetate diesel composite diesel pour point depressant.

[0045] The application of the above-mentioned composite diesel pour point depressant in diesel fuel pour point depressant, the ratio of composite diesel pour point depressant:diesel, calculated by mass ratio, is preferably 1:200, and the composite diesel pour point depressant is added to diesel at a temperature of 40°C After mixing and stirring evenly, ultrasonically disperse for 25 minutes to obtain diesel oil containing the composite diesel pour point depressa...

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Abstract

The invention relates to a compound diesel oil pour point depressant. The compound diesel oil pour point depressant is prepared from the following components in percentage by mass: 40-60% of polytetradecyl methacrylate-maleic anhydride, 10-20% of methyl acetate, 10-30% of ethyl acetate, 5-20% of triethylamine, and 10-20% of dicyclohexylamine. A preparation method comprises the steps that S1, all the components are mixed according to the proportion and evenly stirred, and thus a primary mixed solution is obtained; and S2, the primary mixed solution is dispersed again through an ultrasonic generator, and thus the compound diesel oil pour point depressant is obtained. Compared with the prior art, the diesel oil pour point depressant composition is wide in application range and can be suitablefor all diesel oil in the current market, the dispersity of the pour point depressant in the 0# diesel oil available in the market can be improved, the condensation point of the diesel oil can be decreased by 15-20 DEG C, and the cold filter plugging point of the diesel oil can be decreased by 4-9 DEG C.

Description

technical field [0001] The invention relates to the field of research and development of diesel oil low-temperature flow modifiers, in particular to a composite diesel pour point depressant and its preparation method and application. Background technique [0002] Diesel, as a widely used mineral oil, has a very broad development and application prospect because of its high thermal power, strong dynamics, relative energy saving and many other advantages. However, the problem of low-temperature fluidity of diesel has been restricting its development, and this conflict has aroused people's strong attention. Diesel pour point depressant is an oil-soluble polymer or condensate, which can improve the crystallization process of wax in diesel oil by virtue of its own molecular characteristics, thereby significantly reducing the cold filter point and freezing point of diesel oil, and effectively improving the low-temperature fluidity of diesel oil . However, the current pour point ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/19C10L1/198C10L1/222C08F222/06C08F220/18C10L10/00
CPCC08F220/18C08F222/06C10L1/14C10L1/19C10L1/1983C10L1/2222C10L10/00C10L2270/026C10L2300/20
Inventor 蔺华林解麦莹陈凤飞薛原殷素雅杨太顺苏保婷张方韩生周明安刘金宝
Owner SHANGHAI INST OF TECH
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