Check patentability & draft patents in minutes with Patsnap Eureka AI!

Dicetylpentaerythritoldiphosphite ester synthesis method

A technology of alkyl pentaerythritol diphosphite and pentaerythritol, which is applied in the field of synthesis of dihexadecyl pentaerythritol diphosphite, and can solve the problems of low yield, cumbersome post-treatment process, complicated solvent recovery and purification, etc.

Inactive Publication Date: 2006-05-03
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no phenol in the obtained product, but the process is relatively complicated, the post-treatment process is cumbersome, the yield is low, and aromatic hydrocarbons must be added as solvents in the reaction, and the recovery and purification of solvents is complicated

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
  • Dicetylpentaerythritoldiphosphite ester synthesis method
  • Dicetylpentaerythritoldiphosphite ester synthesis method
  • Dicetylpentaerythritoldiphosphite ester synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The synthetic method of dihexadecyl pentaerythritol diphosphite comprises the following steps:

[0025] 1. Add pentaerythritol, triethyl phosphite and catalyst into a three-necked flask equipped with a stirrer, condenser, thermometer and receiver, and stir at a stirring speed of 300 rpm; heat and react for a period of time under specified temperature conditions , at a temperature of 130°C and a pressure of -0.02Mpa, the ethanol generated by the reaction and unreacted triethyl phosphite are distilled off under reduced pressure to prepare pure pentaerythritol diphosphite;

[0026] Wherein, the mol ratio of triethyl phosphite and pentaerythritol is 2.0: 1;

[0027] By weight, the consumption of the catalyst is 1% of the amount of pentaerythritol; the catalyst can be sodium methylate;

[0028] The reaction temperature is 100°C; the reaction time is 0.5h;

[0029] 2, in the reaction product that (1) step obtains, need not separate and purify, directly add cetyl alcohol whe...

Embodiment 2

[0033] The synthetic method of dihexadecyl pentaerythritol diphosphite comprises the following steps:

[0034] 1. Add pentaerythritol, triethyl phosphite and catalyst into a three-necked flask equipped with a stirrer, condenser, thermometer and receiver, and stir at a stirring speed of 500 rpm; heat and react for a period of time under specified temperature conditions , at a temperature of 130°C and a pressure of 0.02Mpa, the ethanol generated by the reaction and unreacted triethyl phosphite are distilled off under reduced pressure to prepare pure pentaerythritol diphosphite;

[0035] Wherein, the mol ratio of triethyl phosphite and pentaerythritol is 2.20: 1;

[0036] By weight, the consumption of the catalyst is 3% of the amount of pentaerythritol; the catalyst can be sodium hydroxide;

[0037] The reaction temperature is 130°C; the reaction time is 2.5h;

[0038] 2, in the reaction product that (1) step obtains, need not separate and purify, directly add cetyl alcohol whe...

Embodiment 3

[0042] The synthetic method of dihexadecyl pentaerythritol diphosphite comprises the following steps:

[0043] 1. Add pentaerythritol, triethyl phosphite, and catalyst to a three-necked flask equipped with a stirrer, condenser, thermometer, and receiver, and stir at a stirring speed of 700 rpm; heat and react for a period of time under specified temperature conditions , at a temperature of 130°C and a pressure of 0.06Mpa, the ethanol and unreacted triethyl phosphite generated by the reaction were distilled off under reduced pressure to prepare pure pentaerythritol diphosphite;

[0044] Wherein, the mol ratio of triethyl phosphite and pentaerythritol is 2.40: 1;

[0045] By weight, the consumption of catalyst is 4% of pentaerythritol amount;

[0046] The catalyst can be organotin; the reaction temperature is 150°C; the reaction time is 3h;

[0047] 2, in the reaction product that (1) step obtains, need not separate and purify, directly add cetyl alcohol wherein, stir, stirrin...

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 new synthesis method for bicetyl pentaerythritol diphosphite ester, which comprises two steps shown below: 1. synthesis to pentaerythritol diphosphite ester; 2. synethsis to the product. This invention needs no organic solvent and so environmental friendly.

Description

technical field [0001] The invention relates to a synthesis method of an antioxidant, in particular to a new synthesis method of dihexadecyl pentaerythritol diphosphite. Background technique [0002] Phosphite antioxidants are mainly used as auxiliary antioxidants for various synthetic resins such as polyethylene, polypropylene, polyvinyl chloride, ABS resin, and polyester. It has outstanding effects on preventing oxidation and improving color and luster; it has high thermal stability, weather resistance and hydrolysis resistance stability, so it has good processing stability and good transparency of products; it does not pollute, and it is compatible with ultraviolet absorbers. The combination of phenolic antioxidants has a good synergistic effect. The chemical structural formula of dihexadecyl pentaerythritol diphosphite is shown in attached soil. [0003] The synthetic method of dihexadecyl pentaerythritol diphosphite, present bibliographical report mainly selects tolue...

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): C07F9/6564
Inventor 潘朝群康英姿
Owner SOUTH CHINA UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com