Preparation method of diesel oil pour point depressant

A diesel pour point depressant and solvent technology, used in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve problems such as poor universality, achieve good pour point depressant effect, reduce condensation point, and increase shear performance Effect

Inactive Publication Date: 2017-01-04
SHANGHAI INSTITUTE OF TECHNOLOGY
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, some progress has been made in the research of acrylate copolymers and maleic anhydride copolymer diesel pour point depressan

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

Example Embodiment

[0023] The present invention provides a method for preparing a diesel pour point depressant, which includes the following steps: 1) Synthesis of high-carbon methacrylate: weigh a certain amount of high-carbon alcohol, catalyst, polymerization inhibitor and solvent into a reactor, Raise the temperature to 60°C and stir continuously to completely dissolve the solids, then add a certain amount of methacrylic acid to the reaction temperature and react for a certain period of time. After the reaction is over, the product is washed with alkali, water and then vacuum distillation to obtain formaldehyde. High-carbon methacrylate; 2) Synthesis of amide of high-carbon methacrylate-maleic anhydride binary copolymer: Weigh a certain amount of high-carbon methacrylate, maleic anhydride, initiator and solvent and mix well , Start the reaction under nitrogen protection and a certain reaction temperature. After a certain time of reaction, add a certain amount of aromatic amine to the reaction s...

Example Embodiment

[0032] Example 1

[0033] The method for preparing diesel pour point depressant provided by the present invention includes the following steps:

[0034] 1) Add 21.4g of myristyl alcohol, 0.31g of polymerization inhibitor hydroquinone, and 50ml of solvent toluene into a three-necked flask equipped with condenser, water separator and magnetic stirring device. The temperature is raised to 60°C so that all the higher alcohols are dissolved in In toluene, quickly add 12.9g of methacrylic acid and 0.48g of catalyst p-toluenesulfonic acid into a three-necked flask and raise it to 125°C. The water produced by the esterification reaction will form with toluene as the reaction temperature rises. The copolymer is distilled out and enters the water separator after condensation. After reacting at this temperature for 5 hours, it is observed that when the amount of water released is equivalent to the theoretical value, the system is yellow-brown transparent liquid, and the reaction is terminate...

Example Embodiment

[0038] Example 2

[0039] The difference between this embodiment and embodiment 1 is that the higher fatty alcohol in step 1) is replaced with cetyl alcohol.

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 preparation method of a diesel oil pour point depressant. The method includes the following steps of firstly, weighing high alcohols, catalyst, polymerization inhibitor and solvent to be sequentially added into a reactor and stirred till solids are completely dissolved, then adding methacrylic acid, and conducting reduced pressure distillation, alkali washing and water washing on the product after reaction ends to obtain methylacrylic acid high-carbon ester; secondly, weighing methylacrylic acid high-carbon ester, maleic anhydride, initiator and solvent to be evenly mixed, conducting reacting at a certain reaction temperature under the protection of nitrogen, adding aromatic amine and catalyst after reaction, changing the reaction temperature for reaction for a certain period of time, conducting reduced pressure distillation on the reaction liquid after reaction ends, then adding an excessive amount of methyl alcohol to generate white precipitates, removing supernate, and conducting washing and vacuum drying on the obtained white precipitates through methyl alcohol to obtain the diesel oil pour point depressant. The prepared diesel oil pour point depressant can remarkably reduce the condensation point of diesel oil and improve the low-temperature flowability of diesel oil; the raw materials are easy to obtain, the synthesis method is simple, and the additive dosage is small.

Description

[0001] [technical field] [0002] The invention relates to the technical field of preparation of a pour point depressant, in particular to a preparation method of a diesel pour point depressant. [0003] [Background technique] [0004] Diesel is a complex mixture of components, which contains n-alkanes, cycloalkanes, olefins and aromatics. Wax is the n-paraffin in diesel oil, and when the temperature drops, the wax crystals in diesel oil will gradually precipitate out. As the temperature decreases, more and more wax crystals are precipitated, thus forming a three-dimensional network crystal, enclosing the oil in it, causing the oil to lose its fluidity and appear in a solidified state, thus affecting the normal use and transportation of diesel oil. In order to improve the low-temperature flow performance of diesel, certain measures must be taken to reduce the freezing point and cold filter point of diesel. [0005] Diesel pour point depressant, also known as diesel low temper...

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): C08F220/18C08F222/06C08F8/32C10L1/236C10L10/14
CPCC08F8/32C08F220/18C08F220/1818C08F222/06C08F2800/10C08F2800/20C08F2810/50C10L1/236C10L10/14C10L2200/0446C10L2250/04
Inventor 韩生许广文薛原廉翔赵志成刘平周嘉伟蔺华林韩治亚
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap