Phenol ketone products

Plastic rubber

Current Location： Home > News > Chemical Knowledge > Production and manufacturing method and process flow of diphenyl isooctyl phosphite

[Chemical Knowledge]：Production and manufacturing method and process flow of diphenyl isooctyl phosphite

Read： 654 Time：13months ago Source：Transform the World with Simplicity

Phosphite (Phosphorus acid monophenyl diisodecyl ester) is an important chemical raw material, widely used in plastics, rubber, lubricants and other fields. This paper will introduce the manufacturing method of diphenyl isooctyl phosphite, including raw material preparation, reaction process, post-treatment and matters needing attention.

1. Raw material preparation

1. Phenol: As the main raw material of the reaction, phenol should have a high purity to ensure the quality of the product.
2. Isooctanol: As an alcohol raw material for esterification reaction, isooctanol should also have high purity.
3. Phosphorous acid: As a phosphating agent, phosphorous acid needs to be strictly controlled for its purity and acidity.

2. reaction process

1. esterification reaction: phenol and isooctyl alcohol according to the molar ratio of 1:2 ratio into the reactor, heated to 120-140 ℃, in the role of catalyst esterification reaction. During the reaction, it is necessary to continuously remove the generated water to promote the reaction.
2. Phosphating reaction: After the esterification reaction is completed, the temperature is lowered to 80-90 ° C., the calculated amount of phosphorous acid is added, and the stirring reaction is continued for 2-3 hours. In this process, phosphite and esterification products occur phosphating reaction, generating phosphite diphenyl isooctyl ester.

3. Post-treatment

1. Cooling: After completion of the reaction, the reaction solution was cooled to room temperature.
2. Washing: The reaction solution was washed with a sodium carbonate solution to remove acidic impurities therein.
3. Liquid separation: The washed reaction liquid was subjected to liquid separation to separate an organic phase and an aqueous phase.
4. Drying: A drying agent, such as anhydrous sodium sulfate, is added to the organic phase, and the drying agent is removed by filtration after stirring and drying for a period of time.
5. Distillation: The dried organic phase was distilled to collect a fraction of the target product, diisooctyl benzene phosphite.
Precautions for
4.

1. Strictly control the purity and proportion of raw materials to ensure product quality and yield.
2. During the esterification reaction, the water formed needs to be continuously removed to promote the reaction.
3. In the process of phosphating reaction, appropriate temperature and reaction time should be controlled to avoid excessive phosphating or incomplete reaction.
4. During the post-treatment process, attention should be paid to operation specifications and safety to avoid pollution to the environment.

In short, the manufacturing method of diphenyl isooctyl phosphite involves two key steps: esterification reaction and phosphating reaction. It is necessary to strictly control the operating conditions and parameters in the raw material preparation, reaction process and post-treatment to ensure the quality and yield of the product. At the same time, the production process should follow the principle of safety and environmental protection, reduce the impact on the environment.

Previous： Production and manufacturing method and process flow of dimethoxybenzene

Next： Production and manufacturing method and process flow of diphenyl isooctyl phosphite

News Categories