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[Chemical Knowledge]：Manufacturing method and process of 1.3-butanediol

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1.3-Butanediol (1,3-BD) is an important chemical raw material, which is widely used in medicine, cosmetics, pesticides, plastics, fibers and other fields. The following are several common 1.3-butanediol manufacturing methods:

1. biological method

biological method is a method of producing 1.3-butanediol by microbial fermentation. Commonly used microorganisms are Escherichia coli, yeast and so on. The biological production process is relatively simple, easy to operate, and environmentally friendly, so it is favored. The specific steps are as follows:

1. mixing carbon source substances such as glucose and corn starch with nutrients such as nitrogen source and phosphorus source to prepare a fermentation medium.

2. Inoculate the microbial strain into the fermentation medium, control the temperature, pH and other conditions, so that the growth and reproduction of microorganisms.

3. Microorganisms will produce 1.3-butanediol in the process of metabolism. Through separation and purification, 1.3-butanediol products with high purity can be obtained.

2. chemistry

chemistry is a method of synthesizing 1.3-butanediol by a chemical reaction. Commonly used raw materials are acetaldehyde, hydrogen, formaldehyde and so on. Specific steps are as follows:

1. acetaldehyde and hydrogen are hydrogenated under the action of a catalyst to generate butanol.

2. Butanol reacts with water under acidic conditions to produce 1.3-butanediol.

3. Through distillation, rectification and other processes, 1.3-butanediol and impurities were separated to obtain high purity products.

3. by-product recovery method

In some chemical production processes, 1.3-butanediol will appear as a by-product. By recovering these by-products, 1.3-butanediol can also be obtained. The specific steps are as follows:

1. During the production process, the by-products containing 1.3-butanediol are collected.

2. Through distillation, rectification and other processes, 1.3-butanediol and impurities were separated to obtain high purity products.

The above three methods are common methods for manufacturing 1.3-butanediol, and each method has its advantages, disadvantages and scope of application. When choosing a manufacturing method, you need to consider comprehensively according to the actual situation and choose the most suitable method. At the same time, it is necessary to pay attention to safety, environmental protection and other issues in the production process to ensure the smooth progress of production.

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