Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF4 Cites 39 Cited by
  • 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 and high freezing point, the freezing point of lubricating oil processed with it is also relatively high, which seriously affects its use. performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0020] (1) For esterification reaction, add cetyl alcohol and water-carrying agent toluene into the three-necked flask, pass cooling water through the condenser tube, heat in an oil bath under mechanical stirring, and the temperature reaches 110-140°C, then add methacrylic acid In the three-necked flask, the molar ratio of cetyl alcohol to methacrylic acid is 1:1.5; after it is mixed evenly with the alcohol, the catalyst toluenesulfonic acid and the polymerization inhibitor hydroquinone are added, and the mass of the catalyst is the reaction monomer Gross mass 1.3%, the quality of described polymerization inhibitor is 0.5% of the total mass of reaction monomer; The water separator is continuously separated, and the water-carrying agent toluene solution in the upper layer of the water separator will return to the three-necked flask; after continuing to ...

Embodiment 2

[0026] (1) For esterification reaction, add cetyl alcohol and water-carrying agent toluene into the three-necked flask, pass cooling water through the condenser tube, heat in an oil bath under mechanical stirring, and the temperature reaches 110-140°C, then add methacrylic acid In the three-necked flask, the molar ratio of cetyl alcohol to methacrylic acid is 1: 2.5; after it is mixed evenly with the alcohol, the catalyst toluenesulfonic acid and the polymerization inhibitor hydroquinone are added, and the mass of the catalyst is the reaction monomer Gross mass 2.0%, the quality of described polymerization inhibitor is 1.0% of the total mass of reaction monomer; The water separator is continuously separated, and the water-carrying agent toluene solution in the upper layer of the water separator will return to the three-necked flask; after continuing to heat up to the esterification temperature, the constant temperature reaction is performed for several hours, when the height of...

Embodiment 3

[0032] (1) Esterification reaction, add cetyl alcohol and water-carrying agent toluene into the three-necked flask, pass the cooling water through the condenser tube, heat the oil bath under mechanical stirring, and the temperature reaches 125 ° C, at this time, add methacrylic acid to the three-necked flask In the flask, the molar ratio of cetyl alcohol to methacrylic acid is 1:2; after it is mixed evenly with the alcohol, the catalyst toluenesulfonic acid and the polymerization inhibitor hydroquinone are added, and the mass of the catalyst is the total mass of the reaction monomer 1.8%, the quality of described polymerization inhibitor is 0.8% of reaction monomer total mass; The toluene solution of the water-carrying agent in the upper layer of the water separator will flow back into the three-necked flask; continue to heat up to the esterification temperature, and react at a constant temperature for several hours. When the height of the water layer in the water separator rem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F220/18C08F212/08C08F222/08C10M145/14C10N30/02
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com