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[Chemical Knowledge]：The production and manufacturing method and process of propylene alcohol.

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Manufacturing method
of allyl alcohol
allyl alcohol is an important organic chemical raw material, which is widely used in the production of various chemicals, polymers and materials. In the field of chemical production raw materials, the manufacturing method of allyl alcohol is of great interest, because different manufacturing methods will affect the purity, yield and cost of the product. This article will introduce several common manufacturing methods of allyl alcohol.

1. Chloropropene hydrolysis
Chloropropene hydrolysis is one of the common methods for the manufacture of propylene alcohol. The process first reacts allyl chloride with water under acidic conditions to produce 2-chloropropanol. The 2-chloropropanol is then converted to allyl alcohol by a basic hydrolysis reaction. This method has mild reaction conditions and simple operation, but it will produce a large amount of waste water and waste salt, which will cause certain pollution to the environment.

2. Propylene Oxide Hydrolysis
Propylene oxide hydration is another method of making allyl alcohol. The process reacts propylene oxide with water in the presence of an acidic or basic catalyst to produce allyl alcohol. The advantages of this method are mild reaction conditions, high selectivity and less waste water. However, the activity of the catalyst will be affected and it needs to be replaced regularly.

3. Acrolein Reduction
The acrolein reduction method is a method of producing allyl alcohol by reducing acrolein to allyl alcohol. As the reducing agent, hydrogen gas, metal hydride, or the like can be used. The reaction conditions of this method are relatively harsh and require high temperature and high pressure conditions, but the selectivity is high and the yield is high.

4. biological method
biological method is a new type of propylene alcohol manufacturing method, through the way of microbial fermentation to produce propylene alcohol. This method has the advantages of environmental protection and energy saving, but the current production efficiency is low, and it is necessary to further improve the fermentation efficiency of microorganisms.

In general, different allyl alcohol manufacturing methods have their own advantages and disadvantages, and it is necessary to select a suitable method according to specific production conditions and requirements. In the future, with the continuous progress and application of technology, the manufacturing method of allyl alcohol will be more and more perfect, to achieve more efficient and more environmentally friendly production.

In the actual production process, in order to improve the yield and purity of allyl alcohol, the following points need to be paid attention to:

1. Control the reaction temperature and pressure to ensure that the reaction is carried out under the best conditions;
2. Select the right Catalyst and reaction medium to improve reaction selectivity;
3. Strictly control the quality and proportion of raw materials to avoid the influence of impurities on the reaction;
4. Strengthen the maintenance and maintenance of production equipment to ensure the normal operation of the equipment;
5. Conduct comprehensive monitoring of the production process to find and solve problems in time.

In short, the manufacturing method of allyl alcohol is a process of continuous development and optimization. It is necessary to continuously study and explore new technical means and production processes to improve production efficiency, reduce costs, reduce environmental pollution, and make greater contributions to the development of chemical production raw materials.

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