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Maleate monomers used for preparing pour depressant components

A technology of maleic acid esters and pour point depressants, which is applied in the field of structure design and preparation of maleic acid esters, can solve the problems of high price and rare alcohol, and achieve the effects of various types, simple preparation methods, and easy-to-obtain raw materials

Inactive Publication Date: 2018-03-06
天津市明瑞石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, n-alkanols with more than 14 carbons are mostly derived from natural products, not only the price is high, but alcohols with more than 18 carbons are especially rare

Method used

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  • Maleate monomers used for preparing pour depressant components
  • Maleate monomers used for preparing pour depressant components
  • Maleate monomers used for preparing pour depressant components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation of mono-(4-hexadecyloxy)-butyl maleate comprises the following steps;

[0022] (1) Add 121.2g (0.5mol) of n-hexadecanol, 24.0g (0.6mol) of sodium hydroxide powder, and 650mL of dimethyl sulfoxide into a 1000mL four-necked bottle in turn, stir to make the dispersion well, and then slowly heat to 83°C , to obtain a light yellow clear sodium alkoxide solution, which was cooled to 50°C for later use.

[0023] Add 76.2g (0.6mol) 1,4-dichlorobutane and 200mL dimethyl sulfoxide into a 2000mL four-neck flask, heat to 45°C under stirring, slowly add the above sodium alkoxide solution from the insulating funnel, and keep The temperature is 40-45°C, drop it for 3 hours, then keep it warm and stir for 3.5 hours, then slowly add 800mL water at 60°C under stirring, separate the oil layer while it is hot, wash with hot water at 60°C, and get a viscous oil. 89.3%

[0024] (2) Add 133.2g (0.4mol) of the above-mentioned chlorinated ether, 47.0 (0.5mol)g sodium maleate a...

Embodiment 2

[0026] The preparation of mono-(4-octadecyloxy)-butyl maleate comprises the following steps;

[0027] (1) Add 135.2g (0.5mol) n-octadecyl alcohol, 24.0g (0.6mol) sodium hydroxide powder, and 650mL dimethyl sulfoxide to a 1000mL four-necked bottle in turn, stir to make the dispersion well, and then slowly heat to 83°C , to obtain a light yellow clear sodium alkoxide solution, which was cooled to 50°C for later use.

[0028] Add 76.2g (0.6mol) 1,4-dichlorobutane and 200mL dimethyl sulfoxide into a 2000mL four-neck flask, heat to 45°C under stirring, slowly add the above sodium alkoxide solution from the insulating funnel, and keep The temperature is 40~45°C, after 3 hours of dripping, then keep stirring for 3.5 hours, then slowly add 800mL of water at 60°C under stirring, separate the oil layer while it is hot, wash with hot water at 60°C, and obtain a viscous oil. 86.8%

[0029] (2) Add 144.4g (0.4mol) of the above-mentioned chlorinated ether, 47.0 (0.5mol)g sodium maleate an...

Embodiment 3

[0031] The preparation of mono-(6-octadecyloxy)-hexyl maleate comprises the following steps;

[0032] (1) Add 135.2g (0.5mol) n-octadecyl alcohol, 24.0g (0.6mol) sodium hydroxide powder, and 650mL dimethyl sulfoxide to a 1000mL four-necked bottle in turn, stir to make the dispersion well, and then slowly heat to 83°C , to obtain a light yellow and clear sodium alkoxide solution, which was cooled to 50°C for later use;

[0033] Add 93.0g (0.6mol) 1,6-dichloro-n-hexane and 200mL dimethyl sulfoxide into a 2000mL four-neck flask, heat to 45°C under stirring, slowly add the above sodium alkoxide solution from the insulating funnel, and keep The temperature is 40~45°C, after 3 hours of dripping, then keep stirring for 3.5 hours, then slowly add 800mL of water at 60°C under stirring, separate the oil layer while it is hot, wash with hot water at 60°C, and obtain a viscous oil. 74.8%.

[0034] (2) Add 155.6g (0.4mol) of the above-mentioned chlorinated ether, 47.0 (0.5mol)g sodium ...

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Abstract

The invention discloses maleate monomers used for preparing pour depressant components and a preparation method of the maleate monomers. The maleate monomers are structurally characterized by being maleate alkoxy alcohol ester. The preparation method comprises the steps that n-alcohol and n-alkane with the terminal substituted with dichloro are used as raw materials, chloroether with the total number of carbon of 20-26 is synthesized through the Williamson ether synthesis method, and then the chloroether and sodium maleate are subjected to the SN2 reaction to synthesize maleate. The preparation method of the maleate monomers is simple, the raw materials are easy to obtain, the product yield is high, and many kinds of maleate monomers can be prepared.

Description

technical field [0001] The invention relates to the field of structural design and preparation of maleic acid esters, in particular to a maleic acid ester monomer for preparing pour point depressant components and a preparation method thereof. Background technique [0002] Diesel solidification is often a problem in winter in the north, and diesel solidification is mostly caused by the wax in diesel oil. Appropriate pour point depressants can interact with wax crystals in diesel oil, significantly lower the freezing point of waxy diesel oil, and improve its low temperature fluidity. [0003] There are many types of diesel pour point depressants, the main component of which is the copolymer of higher alcohol maleate and vinyl acetate or styrene. [0004] According to the principle of similarity and compatibility, in order to achieve higher pour point depressing efficiency, maleic acid higher alcohol esters are generally considered to be synthesized with maleic acid and n-alk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/10C07C69/60C07C41/16C07C43/12C08F222/16C10L1/236
CPCC10L1/236C07C41/16C07C67/10C07C69/60C08F222/16C08F222/165C07C43/12
Inventor 李洪波
Owner 天津市明瑞石油科技有限公司
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