Isophorone diamine (IPDA) is an important chemical raw material widely used in polyurethanes, epoxy resins, polyamides and other fields. The following method for manufacturing isophorone diamine is divided into two stages: the first stage is the preparation of isophorone, and the second stage is the conversion of isophorone to isophorone diamine by an ammonification reaction.
Stage I: Preparation of isophorone
1. Preparation of raw materials
The main raw materials for the preparation of isophorone are acetone and hydrogen. Firstly, acetone and hydrogen need to be mixed in a certain proportion and a catalyst needs to be added.
2. Reaction process
Under the action of catalyst, acetone and hydrogen undergo an addition reaction to produce isophorone. This reaction needs to be carried out at a certain temperature and pressure to ensure that the reaction proceeds smoothly.
3. Product Separation and Purification
After the reaction is completed, the product needs to be separated and purified to obtain isophorone with higher purity. Distillation is generally used to separate isophorone from the reaction mixture and further purification.
Phase II: Preparation of isophorone diamine
1. Raw material preparation
The raw materials for the preparation of isophorone diamine are isophorone and ammonia. Isophorone and ammonia were mixed in a certain ratio and catalyst was added.
2. Reaction process
Under the action of catalyst, isophorone and ammonia gas undergo an ammonification reaction to produce isophorone diamine. This reaction also needs to be carried out at a certain temperature and pressure to ensure the smooth progress of the reaction.
3. Product Separation and Purification
After the reaction is completed, the product needs to be separated and purified to obtain isophorone diamine with higher purity. Distillation and crystallization are generally used to separate isophorone diamine from the reaction mixture and for further purification.
Above is the manufacturing method of isophorone diamine, it should be noted that in the whole manufacturing process, the reaction conditions and the proportion of raw materials need to be strictly controlled to ensure the quality and purity of the product. Meanwhile, since isophorone diamine is a hazardous chemical, it is necessary to strengthen the safety protection measures during the manufacturing process to safeguard the health of the production personnel and the safety of the environment.
In conclusion, the manufacturing method of isophorone diamine needs to go through several steps and links, and needs to strictly control the reaction conditions and the proportion of raw materials to ensure the quality and purity of the product. At the same time, safety protection measures need to be strengthened to safeguard the physical health of production personnel and environmental safety.
