1,4-butynediol synthesis method:

 

         1. Using acetylene formaldehyde synthesis method containing 80%-90% of acetylene is compressed to a pressure of 0.4-0.5MPa, preheated to 70-80 ° C, sent to the reactor, with butynone as catalyst, and formaldehyde in 110- The reaction was carried out at 112 ° C to give a crude product. The reaction product is concentrated and refined to obtain a finished product, while the by-produced propynyl alcohol

 

         2. Paraformaldehyde atmospheric pressure solvent method: using paraformaldehyde as raw material, using cyclohexanone as solvent, in the presence of catalyst acetylene copper, introducing acetylene into the reactor, maintaining the temperature of 115-120 ° C, until the formaldehyde is completely After the post-conversion, the acetylene is stopped, the catalyst is filtered off, and the reaction liquid is concentrated and recrystallized to obtain crystalline butynediol.