Melamine cyanurate manufacture method_wet process (1)

Melamine cyanurate manufacture method_wet process (1)

The process of Synthesizing MCA by wet method is as follows.

As mentioned above, because the solubility of melamine and cyanuric acid in water is very small, the Synthesis of melamine cyanurate by wet method is carried out in a lot of water, the aim of the process development is how to improve the production efficiency of the single kettle on the premise of obtaining the required crystal forms of the products. According to the different uses of the products and the developers, there are three reaction processes under acidic, neutral and alkaline conditions, here are a few of them.

1. Acidic process_ melamine cyanurate

They have developed a technology for synthesizing melamine cyanurate in strong acidic water with a Ph less than 1, on the basis of the existing acidic process, the most important feature of this process is that the amount of reaction medium water is less than 100 parts of melamine and cyanuric acid only need to add at least 120 parts of water, the reaction temperature is 80-95 °c, the time is short 10-30 Min.

However, the amount of water used in the refining process is large, and the key to the industrial application of the technology is to solve the recycling of washing water.