Method for the preparation of ethyl cyanoacetate
There are methods for the preparation of ethyl cyanoacetate in the world. In the past, Fangjia used cyanoacetic acid and ethanol as materials, supplemented with sulfuric acid, and put them together in a kettle, which was heated and slowly heated. During this period, the contents of the kettle gradually changed, and when bubbles escaped, they were like boiling soup. When it should be finished, cold it, adjust its properties with alkali, and then distill it to analyze its essence, ethyl cyanoacetate can be obtained.

There are also those based on ethyl chloroacetate and sodium cyanide. Mix the two, put them in the container, and promote their phase transformation at an appropriate temperature. At the right time, observe its color change and gas generation, wait for it to be harmonious, and then go through filtration, steaming and other techniques to remove its impurities, and store its pure product. Ethyl cyanoacetate is formed.

In the process of preparation, pay attention to the control of temperature and the amount of agent. If the temperature is too high, it should be too high, or the quality should be inferior; if the temperature is low, it should be slow, time-consuming and labor-intensive. The amount of agent is also related to the purity and impurities of the finished product. And the place of preparation should be well ventilated to avoid the harm of its qi and ensure the safety of the operator. In this way, a good system of ethyl cyanoacetate can be obtained.