Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing salicylic acid p-octyl phenyl ester as light stabilizer

A technology of octyl phenyl ester and light stabilizer, which is applied in the preparation field of light stabilizer p-octyl phenyl salicylate, can solve the problems of weak chlorination ability of thionyl chloride, low yield and the like, and achieves product yield. The effect of high rate, high product purity and short reaction time

Inactive Publication Date: 2012-03-21
南通惠康国际企业有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the synthetic method of p-octylphenyl salicylate mainly contains direct esterification method, Williamson (A.W.Williamson) method and phase-transfer catalytic method, and above-mentioned method can generate p-octylphenyl salicylate in theory, It is usually obtained by condensation reaction of salicylic acid, p-octylphenol and thionyl chloride as raw materials, but the acid chlorination ability of thionyl chloride is relatively weak, and excessive thionyl chloride needs to be used. Even so, the product The yield is also very low, so it is more reasonable to choose phosphorus oxychloride as the acyl chloride

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing salicylic acid p-octyl phenyl ester as light stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a 250mL four-necked flask equipped with a thermometer, add 13.8g of salicylic acid, 7.4g of phosphorus oxychloride, 24.7g of p-octylphenol, and 38.7g of solvent, install a condenser tube, start the stirrer, and heat up to 90- At 110°C, stir slightly, and the reaction time is 5.5-9h. Under the condition of strong stirring, slowly pour the reactant into the solution of 15g anhydrous sodium carbonate in 450ml water, and separate and remove the excess phosphorus oxychloride and p-octyl base phenol. The solvent is recovered by vacuum distillation under reduced pressure, and the residue after removing the solvent is the crude product p-octylphenyl salicylate, and then recrystallized the crude product p-octylphenyl salicylate with absolute ethanol to obtain the product p-octylphenyl salicylate, product yield: 95.44%, melting point: 72-74°C.

Embodiment 2

[0021] In a 250mL four-necked flask equipped with a thermometer, add 13.8g of salicylic acid, 7.4g of phosphorus oxychloride, 25.7g of p-octylphenol, and 33g of solvent, install a condenser, start the agitator, and heat up to 90-110 ℃, stir slightly, and the reaction time is 5.5-9h. Under the condition of strong stirring, slowly pour the reactant into the solution of 15g of anhydrous sodium carbonate in 450ml of water, and separate and remove the excess phosphorus oxychloride and p-octyl phenol. The solvent is recovered by vacuum distillation under reduced pressure, and the residue after removing the solvent is the crude product p-octylphenyl salicylate, and then recrystallized the crude product p-octylphenyl salicylate with absolute ethanol to obtain the product p-octylphenyl salicylate, product yield: 95.82%, melting point: 72-74°C.

Embodiment 3

[0023] In a 250mL four-neck flask equipped with a thermometer, add 13.8g of salicylic acid, 7.4g of phosphorus oxychloride, 26.8g of p-octylphenol, and 40g of solvent, install a condenser tube, start the stirrer, and heat up to 90-110 ℃, stir slightly, and the reaction time is 5.5-9h. Under the condition of strong stirring, slowly pour the reactant into the solution of 15g of anhydrous sodium carbonate in 450ml of water, and separate and remove the excess phosphorus oxychloride and p-octyl phenol. The solvent is recovered by vacuum distillation under reduced pressure, and the residue after removing the solvent is the crude product p-octylphenyl salicylate, and then recrystallized the crude product p-octylphenyl salicylate with absolute ethanol to obtain the product p-octylphenyl salicylate, product yield: 95.91%, melting point: 72-74°C.

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 method for preparing salicylic acid p-octyl phenyl ester as a light stabilizer. The method is as follows: salicylic acid, p-octyl phenol and phosphorus oxychloride are used as raw materials, and reaction is carried out in the presence of a solvent to obtain the salicylic acid p-octyl phenyl ester. According to the invention, the salicylic acid p-octyl phenyl ester is synthetized using the salicylic acid, the p-octyl phenol and the phosphorus oxychloride as the raw materials. The method has the advantages of simpleness in separation and purification processes, short reaction time, high product yield (up to more than 95%), high obtained product purity, low energy consumption, little environmental pollution and low cost and is an ideal process for realizing industrialized production.

Description

technical field [0001] The invention relates to a preparation method of light stabilizer p-octylphenyl salicylate. Background technique [0002] p-Octylphenyl Salicylate, also known as UV absorber OPS, white powder crystal. p-octylphenyl salicylate is used in UV absorbers, the price is low, it has good compatibility with polyolefins, and has excellent weather resistance, and is widely used. It is mainly used in UV absorbers such as polyethylene, polypropylene, and synthetic rubber. . Its chemical name is: p-octylphenyl salicylate. Molecular formula: C 21 h 26 o 3 ; Molecular weight: 326.4; Molecular structural formula: [0003] [0004] Physical and chemical properties: Appearance is white crystalline powder, melting point mp: 72-74°C. [0005] At present, the synthetic method of p-octylphenyl salicylate mainly contains direct esterification method, Williamson (A.W.Williamson) method and phase-transfer catalytic method, and above-mentioned method can generate p-oct...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/84C07C67/14
Inventor 王树清王歆然陈智萍杜承贤祁云
Owner 南通惠康国际企业有限公司