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[Chemical Knowledge]：Production and manufacturing method and process flow of phosphorus-containing intermediate

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Phosphorus-containing intermediates have important application value in the field of chemical production raw materials, especially in pesticides, pharmaceuticals, materials and other fields. This article will detail the manufacturing methods of several phosphorus-containing intermediates.

1. Phosphite Phosphorus-containing intermediate

Phosphite phosphorus-containing intermediate is a kind of common phosphorus-containing compounds, with excellent oxidation resistance and thermal stability, widely used in plastics, rubber, lubricants and other fields. The following is a phosphorous acid ester phosphorus-containing intermediate manufacturing method:

1. phosphoric acid, alcohol compounds and catalyst into the reactor, heating to a certain temperature, esterification reaction.
2. After completion of the reaction, post-treatment steps such as distillation and extraction are performed to obtain the target product.

2. phosphate ester phosphorus-containing intermediate

phosphate ester phosphorus-containing intermediate has a wide range of applications in pesticides, pharmaceuticals and other fields. The following is a phosphoric acid ester phosphorus-containing intermediate manufacturing method:

1. phosphoric acid, alcohol compounds and ester compounds into the reactor, adding a catalyst, heating to a certain temperature, ester exchange reaction.
2. After completion of the reaction, post-treatment steps such as distillation and crystallization are performed to obtain the target product.

3. phosphonate phosphorus-containing intermediates

phosphonate phosphorus-containing intermediates have high biological activity and can be used for the preparation of pesticides, pharmaceuticals and the like. The following is a manufacturing method of phosphonate phosphorus-containing intermediates:

1. add chlorinated hydrocarbon, phosphite and alkali metal salt into the reaction kettle, heat up to a certain temperature, nucleophilic substitution reaction.
2. After completion of the reaction, post-treatment steps such as extraction and crystallization are performed to obtain the target product.

4. Phosphoramide phosphorus-containing intermediate

Phosphoramide phosphorus-containing intermediate is an important class of nitrogen-containing phosphorus compounds, can be used for the preparation of pesticides, pigments and so on. The following is a kind of phosphorus amide phosphorus intermediate manufacturing method:

1 will be amine compounds, phosphoric acid and catalyst into the reaction kettle, heating to a certain temperature, the amidation reaction.
2. After completion of the reaction, post-treatment steps such as distillation and crystallization are performed to obtain the target product.

The above introduces several common manufacturing methods of phosphorus-containing intermediates. Different methods have different advantages and disadvantages and scope of application. In the actual production process, the appropriate manufacturing method should be selected according to specific needs and conditions. At the same time, in order to ensure the smooth progress of the production process and the stability of product quality, the following points need to be paid attention to:

1. Strictly control the quality and proportion of raw materials to ensure the stability and reliability of reaction conditions;
2. Strengthen the production process Monitoring and testing, timely detection and resolution of potential problems;
3. Optimize production processes and equipment to improve production efficiency and product quality;
4. Strengthen the treatment and recycling of waste water, waste gas and other wastes to reduce production costs and environmental pollution.

In short, the manufacturing method of phosphorus-containing intermediates is of great significance in the field of chemical production raw materials. By selecting the appropriate manufacturing method and strengthening the control of the production process, high-quality, high-value-added phosphorus-containing intermediates can be produced. Provide strong support for the development of related fields.

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