Acetylenedicarboxylic acid production methods
Acetylenedicarboxylic acid production methods
Acetylenedicarboxylic acid production method is based on α, β-dibromo-succinic acid as raw materials, in alkaline solution obtained butyne 2 HBr removal of sodium. Butyne 2 Preparation of sodium: preparation of sodium hydroxide solution, cooling, adding successive α, β-dibromo succinic acid. Canada finished warming up to 40 ℃ insulation 3h. To below 10 ℃ cooling crystallization, filtration, crystallization drying, sodium 2-butyne. Yield of 75-87%. Finally be Acetylenedicarboxylic acid.