Manufacturing Method of Dimethylamine
Dimethylamine is an important organic chemical raw material, which is widely used in pesticides, pharmaceuticals, dyestuffs, rubber, leather and other fields. This article will introduce the manufacturing method of dimethylamine.
I. Ammoniation method
Ammoniation method is one of the main methods to produce dimethylamine, which is based on the principle of reacting methanol and ammonia at high temperature and high pressure to produce dimethylamine and water. The specific steps are as follows:
1. Mix methanol and liquid ammonia proportionally and feed them into the reactor.
2. Under high temperature and high pressure, methanol and liquid ammonia react to form dimethylamine and water.
3. The reaction products are cooled and separated to obtain dimethylamine and water.
4. The dimethylamine is refined to obtain a higher purity dimethylamine product.
The advantage of the ammoniation method is that the process is mature and simple to operate, but the production process requires high temperature and high pressure conditions, and energy consumption is large.
II. Formic acid method
Formic acid method is another method to produce dimethylamine, the principle is to react formic acid and methanol at high temperature to produce dimethylamine and carbon dioxide. The specific steps are as follows:
1. Mix formic acid and methanol in proportion and feed them into the reactor.
2. At high temperature, formic acid and methanol react to form dimethylamine and carbon dioxide.
3. The reaction products are cooled and separated to give dimethylamine and carbon dioxide.
4. The dimethylamine is refined to give a higher purity dimethylamine product.
The advantage of the formic acid method is that the reaction conditions are relatively low and energy consumption is low, but the production process generates a large amount of carbon dioxide gas, which needs to be treated.
Third, 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 suitable microbial strains into the fermenter.
2. Under suitable conditions, the microbial strains utilize nutrients for fermentation to produce dimethylamine.
3. Through the processes of separation and purification, the product of dimethylamine with high purity is obtained.
The advantages of the biological method are that the production process does not require high temperature and high pressure conditions, energy consumption is low, and it does not produce a large amount of waste gas, waste water and other pollutants. However, the production efficiency of the biological method is low, which needs further research and improvement.
In summary, ammoniation, formic acid and biological methods are all methods for producing dimethylamine, and each method has its advantages, disadvantages and scope of application. When choosing production methods, comprehensive consideration should be made according to the actual situation and the most suitable production method should be chosen. At the same time, with the continuous progress and development of science and technology, new dimethylamine production methods will continue to emerge, injecting new vitality into the development of the field of raw materials for chemical production.
