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[Chemical Knowledge]：The production and manufacturing method and process of polymer-grade propylene-and other external products.

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The manufacturing method
of polymer grade propylene -
1. Introduction

propylene is an important chemical raw material, widely used in polymer production, fine chemicals and other fields. In the production of chemicals, polymer grade propylene is a high quality propylene, high purity, suitable for the production of high performance polymers. However, in the actual production process, due to various reasons, some other products are often produced, that is, propylene that does not meet the quality requirements of polymerization grade propylene. These foreign products cannot be directly used in polymer production and require certain processing to meet quality requirements. This article will introduce a polymer-grade propylene-and other foreign products manufacturing method, designed to convert these and other foreign products into qualified polymer-grade propylene.

2. Manufacturing Methods

1. Refined

and other external products propylene contains more impurities, such as water, sulfur compounds, hydrocarbons and so on. Therefore, first of all, it is necessary to purify the external product propylene and remove the impurities therein. Commonly used refining methods include drying, desulfurization, hydrocarbon removal, etc. The specific method can be selected according to the type and content of impurities.

2. Oxidation

Refined propylene needs to be oxidized to improve its purity. The oxidation reaction can oxidize the carbon-carbon double bond in propylene to a carboxyl group or an aldehyde group, thereby converting it into a compound that is easy to remove. Commonly used oxidizing agents include hydrogen peroxide, oxygen, and the like.

3. Removal of

After oxidation treatment, removal treatment is required to remove the compounds generated by oxidation. Common removal methods include distillation, adsorption, etc. Among them, distillation can separate the compounds formed by oxidation from propylene, and adsorption can adsorb them on the adsorbent.

4. purification

removal of treated propylene still contains some impurities, need to be purified. Commonly used purification methods include distillation, adsorption and the like. Through multiple purifications, higher purity polymerization grade propylene can be obtained.

3. precautions

1. Control reaction conditions

In the manufacturing process, it is necessary to strictly control the reaction conditions, such as temperature, pressure, reaction time, etc. To ensure that the reaction proceeds completely and not excessively and to avoid the formation of unnecessary by-products.

2. Choosing the right oxidant and removal agent

Different oxidants and removal agents have different effects on the purity and yield of propylene. Therefore, when selecting the oxidizing agent and the removing agent, it needs to be optimized according to the actual situation to obtain the best manufacturing effect.

3. Strengthen equipment maintenance and operation management Various equipment and pipelines need to be used in the

manufacturing process. It is necessary to strengthen equipment maintenance and operation management to ensure the normal operation of equipment and pipelines and avoid leakage and blockage.

4. conclusion

Through the above manufacturing method, polymer-grade propylene-and other foreign products can be converted into qualified polymer-grade propylene, and the utilization rate of resources and economic benefits can be improved. At the same time, it is also necessary to pay attention to the control of reaction conditions, the selection of appropriate oxidants and removal agents, and the strengthening of equipment maintenance and operation management to ensure the smooth progress of the manufacturing process and product quality.

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