Improvement measures and synthesis processes of acetamidine hydrochloride from nitrile over acid catalysts were reviewed. Suggestions for the production and development of acetamidine hydrochloride in China were put forward.
The reaction conditions of supported heteropoly acid catalyst was examined in a fixed - bed reactor.
Solid acid catalyst can be substituted for sulphuric acid as esterification catalyst.
It pointed out the solid acid catalyst is good catalyst for synthesis of diisoamylester maleate.