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[Chemical Knowledge]：Production and manufacturing method and process flow of diisodecyl benzene phosphite

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The manufacturing method
of diisodecyl benzene phosphite
diisodecyl benzene phosphite is an important chemical raw material, widely used in plastics, rubber, lubricants and other fields. This article will introduce a method of manufacturing diisodecyl phenyl phosphite.

1. raw materials and equipment

1. raw materials: phenol, isodecyl alcohol, phosphorus trichloride, sodium hydroxide.
2. Equipment: reaction kettle, stirrer, thermometer, condenser, water separator, oil pump, filter, etc.

2. Manufacturing Steps

1. Add phenol and isodecyl alcohol in a molar ratio of 1:2 into a reactor, turn on the stirrer, and heat to 80-90°C.
2. In another reactor, phosphorus trichloride and sodium hydroxide are added in a molar ratio of 1:1.2, and heated to 80-90 ° C. under stirring to generate sodium phosphite.
3. The generated sodium phosphite is slowly added into the mixture of phenol and isodecyl alcohol, the feeding rate is controlled, the reaction temperature is maintained at 100-110 ° C., and the condenser is started at the same time, and the water is separated by reflux.
4. After the addition is completed, continue to stir and react for 2-3 hours, then cool to 50-60°C, add a small amount of activated carbon for decolorization, and filter to remove activated carbon.
5. Vacuum distillation to collect a fraction of 180-200°C/2kPa, I .e., diisodecyl benzene phosphite.

3. Precautions

1. The temperature should be strictly controlled during operation to prevent too high or too low temperature from affecting the reaction.
2. The feeding speed should be moderate to avoid uneven reaction caused by too fast.
3. Vacuum distillation to control the vacuum degree and distillation temperature, in order to ensure product quality.

4. product quality index
the product quality index of
diisodecyl phosphite is as follows: the appearance is colorless transparent liquid, the acid value is ≤ 0.5mgKOH/g, the ester content is ≥ 98%, and the moisture content is ≤ 0.1.

5. safety and environmental protection

1. During the operation, it is necessary to strictly abide by the safety operation procedures and wear protective equipment to prevent accidents such as acid and alkali burns.
2. Waste materials should be properly handled to avoid environmental pollution.

6. yield and cost

The yield of this manufacturing method is about 85%, the cost is affected by the price of raw materials, equipment depreciation, labor costs and other factors, the specific cost should be calculated according to the actual situation. Summary of

: This paper introduces a manufacturing method of diisodecyl phosphite, which is easy to operate, easy to obtain raw materials, high yield, and suitable for industrial production. At the same time, the operation process should pay attention to safety and environmental protection issues, to ensure product quality and production efficiency.

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