What is the principle behind an acrylic clearant production unit?

The poster is asking about acrylonitrile, right? The cyanohydrin method: Ethylene oxide and hydrogen cyanide react in the presence of water and trimethylamine to produce cyanohydrin; thereafter, acrylonitrile is obtained through dehydration using magnesium carbonate as a catalyst at 200–280°C, with a yield of around 75%. Acrylonitrile produced by this method has a high purity, but hydrocyanic acid is highly toxic and the cost is also high. Acetylene method: Acetylene and hydrocyanic acid react at 80–90°C under the catalysis of a dilute salt acid solution containing cuprous chloride, potassium chloride, and sodium chloride to produce acrylonitrile. This method features a simple production process and good yields, which can reach 97% when calculated based on hydrocyanic acid. However, it has many side reactions, the product is difficult to purify, it is highly toxic, and the price of the raw material acetylene is higher than that of propylene; thus it is inferior to the propylene ammoxidation method in terms of technology and economics. Before 1960, this method was the primary way for countries around the world to produce acrylonitrile. Acrylonitrile production by ammoxidation of propylene: Using propylene, ammonia, air, and water as raw materials, which are fed into a bubbling bed or fixed-bed reactor in specific proportions; under the action of phosphorus-molybdenum-bismuth or antimony-iron catalysts supported on silica gel, acrylonitrile is produced at temperatures of 400–500°C and at normal pressure. Then, the unreacted ammonia is removed using dilute sulfuric acid in a neutralization tower, and gases such as acrylonitrile are absorbed by water in an absorption tower to form an aqueous solution. This solution is then subjected to extraction in an extraction tower to separate acetonitrile, and hydrocyanic acid is removed in a dehydrocyanic acid tower. Through dehydration and distillation, the acrylonitrile product is obtained, with a one-pass yield of up to 75%; the by-products include acetonitrile, hydrocyanic acid, and sulfuric acid.