Synthesis method of polymethacrylate pour point depressant

A technology of polymethacrylate and methacrylic acid, which is applied in the field of lubricating oil, can solve the problems of high freezing point of lubricating oil, poor low-temperature fluidity, and affecting performance, etc., and achieve low-temperature fluidity improvement, high yield, and depressing effect Good results

Inactive Publication Date: 2015-04-22
QINGDAO BAIZHONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the shortage of petroleum resources, the wax content of crude oil in our country has also increased. Along with its poor low-temperature fluidity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] A kind of synthetic method of polymethacrylate pour point depressant, described method comprises the following steps:

[0020] (1) esterification reaction, adding hexadecanol and water-carrying agent toluene into the three-necked flask, cooling water through the condenser tube, under mechanical stirring, heating in an oil bath, the temperature reaches 110-140 ° C, and methacrylic acid is added at this time. In the there-necked flask, the molar ratio of hexadecanol and methacrylic acid is 1:1.5; after it is mixed with alcohol, catalyst toluenesulfonic acid and polymerization inhibitor quinol are added, and the quality of the catalyst is the reaction monomer The total mass is 1.3%, and the quality of the polymerization inhibitor is 0.5% of the total mass of the reaction monomer; when the temperature is raised to the boiling point of the water-carrying agent toluene, the toluene will form an azeotrope with the water generated by the esterification reacti...

Example Embodiment

[0025] Example 2

[0026] (1) esterification reaction, adding hexadecanol and water-carrying agent toluene into the three-necked flask, cooling water through the condenser tube, under mechanical stirring, heating in an oil bath, the temperature reaches 110-140 ° C, and methacrylic acid is added at this time. In the there-necked flask, the mol ratio of hexadecanol and methacrylic acid is 1: 2.5; After it is mixed with alcohol, add catalyst toluenesulfonic acid and polymerization inhibitor benzenediol, and the quality of the catalyst is the reaction monomer The total mass is 2.0%, and the quality of the polymerization inhibitor is 1.0% of the total mass of the reaction monomer; when the temperature is raised to the boiling point of the water-carrying agent toluene, the toluene will form an azeotrope with the water generated by the esterification reaction, and pass The water separator is continuously separated, and the toluene solution of the water-carrying agent in the upper and...

Example Embodiment

[0031] Example 3

[0032] (1) esterification reaction, hexadecanol and water-carrying agent toluene are added into the three-necked flask, cooling water is passed through the condenser tube, and under mechanical stirring, the oil bath is heated, and the temperature reaches 125 ° C. At this time, methacrylic acid is added to the three-necked flask. In the flask, the mol ratio of hexadecanol and methacrylic acid is 1:2; after it is mixed with alcohol uniformly, catalyst toluenesulfonic acid and polymerization inhibitor benzenediol are added, and the quality of the catalyst is the total mass of the reaction monomers 1.8%, the quality of the polymerization inhibitor is 0.8% of the total mass of the reaction monomer; when the temperature is raised to the boiling point of the water-carrying agent toluene, the toluene will form an azeotrope with the water generated by the esterification reaction, and by dividing the water The toluene solution of the water-carrying agent in the upper ...

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PUM

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Abstract

The invention discloses a synthesis method of a polymethacrylate pour point depressant. The method comprises the following steps: (1) synthesizing hexadecyl methacrylate; (2) synthesizing a polymer, proportioning and adding the hexadecyl methacrylate, styrene and maleic anhydride in a ratio of (2-10):(1-5):(1-5) into a three-mouth flask filled with magnetite, by taking toluene as a solvent, adding an initiator benzoyl peroxide, and heating for completely dissolving the reactants, starting to stir, according to the difference of carbon numbers of polycarbonates, maintaining the internal temperature of the three-mouth flask at 65-90 DEG C, and carrying out reaction for 4-8 h; and (3) removing toluene by reduced pressure distillation. The method disclosed by the invention achieves the beneficial effects that the polymethacrylate pour point depressant synthesized by using the method is high in purity, high in yield, and good in pour point depressing effect; and the selection scope of the pour point depressant to base oil is expanded, and the low-temperature fluidity of lubricating oil can be improved well.

Description

technical field [0001] The invention belongs to the field of lubricating oil, in particular to a method for synthesizing a polymethacrylate pour point depressant. Background technique [0002] As a liquid lubricant for various types of machinery, lubricating oil plays the roles of lubrication, cooling, rust prevention, cleaning, sealing and buffering, so as to reduce friction and protect machinery. With the shortage of petroleum resources, the wax content of crude oil in our country has also increased. Along with its poor low-temperature fluidity and high freezing point, the freezing point of lubricating oil processed with it is also relatively high, which seriously affects its use. performance. In order to improve its performance and meet the development requirements of modern society, it is necessary to use new compound additives to improve the low-temperature fluidity of the oil, lower its freezing point, and expand the application range of lubricating oil. [0003]...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F222/08C10M145/14C10N30/02
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH
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