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[Chemical Knowledge]：Manufacturing method and process of dimethylamine

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Manufacturing method

of dimethylamine Dimethylamine is an important organic chemical raw material, widely used in pesticides, pharmaceuticals, dyes, rubber, leather and other fields. This article will introduce the manufacturing method of dimethylamine.

1. ammoniation

ammoniation is one of the main methods for the production of dimethylamine, the principle of which is to react methanol and ammonia at high temperature and high pressure to generate dimethylamine and water. The specific steps are as follows:

1. Methanol and liquid ammonia are mixed in proportion and fed into the reactor.
2. Under high temperature and high pressure, methanol reacts with liquid ammonia to generate dimethylamine and water.
3. The reaction product is cooled and separated to obtain dimethylamine and water.
4. Refining dimethylamine to obtain a higher purity dimethylamine product. The advantages of

ammoniation method are mature process and simple operation, but the production process requires high temperature and high pressure conditions, and the energy consumption is large.

2. Formic acid method

The formic acid method is another method for producing dimethylamine. The principle is to react formic acid and methanol at high temperature to generate dimethylamine and carbon dioxide. The specific steps are as follows:

1. formic acid and methanol are mixed in proportion and fed into the reactor.
2. At high temperatures, formic acid and methanol react to form dimethylamine and carbon dioxide.
3. The reaction product is cooled and separated to obtain dimethylamine and carbon dioxide.
4. Refining dimethylamine to obtain a higher purity dimethylamine product. The advantages of

formic acid method are relatively low reaction conditions and low energy consumption, but a large amount of carbon dioxide gas will be generated during the production process, which needs to be processed.

3. biological method

biological method is a new type of dimethylamine production method, using microbial fermentation to produce dimethylamine. The specific steps are as follows:

1. Inoculate a suitable microbial strain into a fermentor.
2. Under suitable conditions, microbial strains use nutrients for fermentation to produce dimethylamine.
3. Through separation, purification and other processes, high purity dimethylamine products are obtained. The advantage of

biological method is that there is no need for high temperature and high pressure conditions in the production process, the energy consumption is low, and a large amount of waste gas, waste water and other pollutants will not be produced. However, the production efficiency of biological method is low, and further research and improvement are needed.

To sum up, ammoniation, formic acid and biological methods are all methods for the production of dimethylamine, and each method has its advantages and disadvantages and scope of application. When choosing a production method, you should consider comprehensively according to the actual situation and choose the most suitable production method. At the same time, with the continuous progress and development of science and technology, new production methods of dimethylamine will continue to emerge, injecting new vitality into the development of chemical production raw materials.

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