乙烯酮法，也称为乙酸裂解法，是一种低压高温反应，其以乙酸为原料生产乙酸

The ketene method, also known as the acetic acid cracking method, is a low-pressure high-temperature reaction that uses acetic acid as a raw material to produce acetic anhydride. The raw material and triethyl phosphate are used as catalysts. The whole process is divided into two steps. First, gas-phase acetic acid is cracked to produce vinyl ketone, and then acetic acid and vinyl ketone are absorbed to produce crude acid anhydride, and acetic anhydride of higher purity is obtained by distillation and purification. The biggest feature of this method is that the production process is complicated, there are many side reactions, and the energy consumption is large, but because the process is close to perfect, the production safety is high. In addition, the quality requirements for acetic acid in the acetic acid cracking section are low, and other devices and recovered acetic acid can be used. Therefore, this method is still widely used in the early construction of domestic and foreign equipment. Vinyl ketone, the product of acetic acid cleavage, is an important intermediate. It can be used as a raw material for the production of pesticides and food preservatives. This product was not formed during the carbonylation process. Therefore, the cracking process of vinyl ketone is highly feasible.

Ethylene ketone method, also known as acetic cracking, is a low-pressure high temperature reaction, which produces acetic acid as raw material. The raw material and triethyl phosphate as the catalyst. The whole process is divided into two steps. First, the gas phase acetic acid is cracked to produce vinyl ketones, then acetic acid and vinyl ketones are absorbed to produce coarse acid anhydride, and higher purity acetic anhydride is obtained by distillation and purification. The most important feature of this method is the complexity of the production process, the large side reaction and the energy consumption, but the process is close to perfect, the production safety is high. In addition, the quality requirement seisphon of acetic acid is low in the cracking segment of acetic acid and can be used in other devices and recovered acetic acid. Therefore, the method is still widely used in the early construction of domestic and foreign equipment. Vinylketone, the product of acetic cracking, is an important intermediate. It can be used as a raw material for the production of pesticides and food preservatives. The product was not generated during the niobium-basedprocessing process. Therefore, the cleavage process of ethylene ketone is highly feasible.

Vinyl ketone process, also known as acetic acid cracking process, is a low-pressure high-temperature reaction, which uses acetic acid as raw material to produce acetic anhydride. Raw materials and triethyl phosphate were used as catalysts. The whole process is divided into two steps. First, the gas-phase acetic acid is cracked to produce vinyl ketone, then acetic acid and vinyl ketone are absorbed to produce crude anhydrides, and higher purity anhydrides are obtained by distillation and purification. The main characteristics of this method are complex production process, many side reactions and large energy consumption, but due to the near perfect process, the production safety is high. In addition, the quality requirement of acetic acid in the acetic acid cracking section is low, and other devices and recovered acetic acid can be used. Therefore, this method is still widely used in the early construction of domestic and foreign equipment. Vinyl ketone, the product of acetic acid cracking, is an important intermediate. It can be used as raw materials for the production of pesticides and food preservatives. The product was not formed during carbonylation. Therefore, the cracking process of vinyl ketone is highly feasible.<br>