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Novel efficient and environmentally-friendly method for preparing diphenyl monoisooctyl phosphite

A technology of diphenyl phosphite and triphenyl phosphite, which is applied in the field of preparation of novel high-efficiency and environment-friendly diphenyl-isooctyl phosphite, can solve the problems of poor preparation effect, easy environmental pollution, high cost, etc. The effect of polluting the environment, preventing corrosion and saving resources

Inactive Publication Date: 2018-05-22
JIANGSU EVERGREEN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product has low toxicity and can also be used to manufacture food packaging and plastic medical devices and other products. The existing diphenyl-isooctyl phosphite preparation effect is not good, the cost is large, and the preparation process is easy to pollute the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0021] A novel high-efficiency and environment-friendly preparation method of diphenyl-isooctyl phosphite, the preparation method comprising the following steps:

[0022] ①Put molten phenol into a stirred reactor and stir evenly. Keep the phenol in a molten state inside the reactor, not exceeding 45°C. The pressure is controlled at -0.01 vacuum and the phosphorus trichloride solution is evenly added dropwise. After the dropwise addition, continue Stir for 0.5h. After the stirring is completed, the temperature is raised to 150°C and the vacuum degree is fully raised to the ultimate vacuum of the water jet pump, and the reaction is continued for 5 hours at the same temperature. During the reaction process, the reaction kettle is kept stirring at a medium speed. The mass ratio of phosphorus chloride is 3.5:1;

[0023] ②The HCl gas generated in the reaction of step (1) is passed through the pipeline through the condenser and enters the buffer tank, and then absorbs hydrochloric ac...

Embodiment example 2

[0030] A novel high-efficiency and environment-friendly preparation method of diphenyl-isooctyl phosphite, the preparation method comprising the following steps:

[0031] ①Put molten phenol into a stirred reactor and stir evenly. Keep the phenol in a molten state inside the reactor, not exceeding 45°C. The pressure is controlled at -0.01 vacuum and the phosphorus trichloride solution is evenly added dropwise. After the dropwise addition, continue Stir for 0.7h. After the stirring is completed, the temperature is raised to 140°C and the vacuum degree is completely raised to the ultimate vacuum of the water jet pump. The reaction is continued at this temperature for 5 hours. The mass ratio of phosphorus trichloride is 3.5:1;

[0032] ②The HCl gas generated in the reaction of step (1) is passed through the pipeline through the condenser and enters the buffer tank, and then absorbs hydrochloric acid through the falling film absorber;

[0033] ③ After the reaction in the reactor i...

Embodiment example 3

[0039] A novel high-efficiency and environment-friendly preparation method of diphenyl-isooctyl phosphite, the preparation method comprising the following steps:

[0040] ①Put molten phenol into a stirred reactor and stir evenly. Keep the phenol in a molten state inside the reactor, not exceeding 45°C. The pressure is controlled at -0.01 vacuum and the phosphorus trichloride solution is evenly added dropwise. After the dropwise addition, continue Stir for 1 hour. After the stirring is completed, raise the temperature to 145°C and completely increase the vacuum to the ultimate vacuum of the water jet pump. Continue to react at this temperature for 5.5 hours. During the reaction, the reaction kettle is kept stirring at a medium speed. The mass ratio of phosphorus chloride is 3.5:1;

[0041] ②The HCl gas generated in the reaction of step (1) is passed through the pipeline through the condenser and enters the buffer tank, and then absorbs hydrochloric acid through the falling film...

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PUM

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Abstract

A novel efficient and environmentally-friendly method for preparing diphenyl monoisooctyl phosphite is characterized in that HCl is collected in the preparation process, and is condensed and absorbedto become a hydrochloric acid liquid, so corrosion of HCl gas to a production device is prevented, the safety of the production device is protected, the service life of the production device is prolonged, environment harms caused by diffusion of the HCl gas to surrounding air in the production process and acid rain formed by long-time diffusion induced environment pollution are prevented, harms ofthe HCl gas to workers are also prevented, the body health of the workers is protected, and a byproduct hydrochloric acid is obtained; gaseous phenol is collected in the preparation process, and is condensed to obtain molten phenol, and a lot of phenol is used in preparation raw materials, so pollution of the phenol to the environment is prevented, resources are saved, and the preparation cost isreduced; and a reaction is often performed in a vacuum environment, so the production efficiency is improved, and the production time is shortened.

Description

technical field [0001] The invention relates to the field of chemical synthesis, relates to diphenyl-isooctyl phosphite, and is a novel high-efficiency and environment-friendly preparation method of diphenyl-isooctyl phosphite. Background technique [0002] Diphenyl-isooctyl phosphite is a colorless transparent oily liquid. It is mainly used as an auxiliary antioxidant for PVC, PP, PE and other plastics, and can significantly improve the initial coloring performance and anti-aging performance of plastic products. Low volatility, good plugging resistance and weather resistance, better effect when used in combination with organic tin, calcium-zinc, barium-zinc and other composite stabilizers. The product has low toxicity and can also be used to manufacture food packaging and plastic medical devices and other products. The existing diphenyl-isooctyl phosphite has poor preparation effect, high cost, and easy to pollute the environment during the preparation process. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/145
CPCC07F9/145
Inventor 雷树敏孙秋新
Owner JIANGSU EVERGREEN NEW MATERIAL TECH
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