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[Chemical Knowledge]：Production method and process flow of allyl alcohol polyether polyol

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Allyl alcohol Polyether Polyol (APP) is an important raw material for chemical production, which is widely used in polyurethane, coatings, adhesives and other fields. This article will introduce the manufacturing method of allyl alcohol polyether polyol in detail.

1. Raw Materials Preparation

The main raw materials for manufacturing allyl alcohol polyether polyol include: allyl alcohol, ethylene oxide, catalyst (such as potassium hydroxide), polymerization inhibitor, etc. Ensure the quality of raw materials to meet production requirements.

2. catalyst preparation

mixing the catalyst (such as potassium hydroxide) with an appropriate amount of water to form a catalyst solution with a certain concentration. The amount and concentration of the catalyst are adjusted according to the production needs.

3. polymerization reaction

1. in the reactor to add allyl alcohol and catalyst solution, heating to a certain temperature, the allyl alcohol ring opening polymerization.
2. Ethylene oxide is gradually added, and the feeding rate and reaction temperature are controlled to polymerize ethylene oxide with allyl alcohol.
3. In the reaction process, it is necessary to constantly monitor the viscosity, acid value, hydroxyl value and other indicators of the reaction liquid to ensure product quality.

4. post-treatment

1. when the reaction reaches the predetermined requirements, stop feeding, cool to a certain temperature, add polymerization inhibitor, terminate the reaction.
2. The reaction solution is subjected to neutralization, desalting, dehydration and other treatments to obtain an allyl alcohol polyether polyol product.

5. product quality testing and analysis

1. allyl alcohol polyether polyol product quality testing, including viscosity, acid value, hydroxyl value, moisture and other indicators to ensure that the product meets the relevant standards.
2. Analyze the data of the production process, optimize the production parameters, and improve the product quality and yield.

6. Waste Treatment and Environmental Protection Measures

1. Classify the waste generated in the production process, recycle the recyclable waste, and dispose the non-recyclable waste safely.
2. Strengthen the environmental protection management of the production site, reduce the waste gas, waste water, noise and other pollution in the production process, and ensure that the production process meets the environmental protection requirements.

summary: The manufacturing method of

allyl alcohol polyether polyol involves many links, including raw material preparation, catalyst preparation, polymerization reaction, post-treatment, product quality inspection and analysis, waste treatment and environmental protection measures. In the actual production process, it is necessary to carefully operate and adjust each link according to specific production conditions and requirements to ensure product quality and production efficiency. At the same time, strengthen the safety management and environmental protection management of the production site to ensure that the production process meets the requirements of relevant regulations and standards.

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