Polymerization inhibitor for preparing isoprene by extraction and distillation

The invention relates to a polymerization inhibitor, in particular to a polymerization inhibitor for preparing isoprene by extraction and distillation. The polymerization inhibitor for preparing isoprene by extraction and distillation is characterized by being prepared from a component A, a component B and a solvent in a weight mass of (5-30%): (2-20%): (50-90%). The component A is 4-hydroxyl-2,2,6,6-tetramethyl piperidine free radical of nitroxide, the component B is methanol, and the solvent is water. The product is good in polymerization inhibition, quick to react and simple in formula. Compared with the polymerization inhibitor, the polymerization inhibitor is higher in stability and small in toxicity, and can inhibit polymerization of isoprene extracted and distilled from a petroleumC5 fraction effectively and reduce formation of high polymers, so that the material keeps relatively good flowability. 本发明涉及种阻聚剂，特别公开了种用于萃取精馏制备异戊二烯的阻聚剂。该用于萃取精馏制备异戊二烯的阻聚剂，其特征在于：由组分A、组分B及溶剂按照5-30%：2-20%：50-90%的质量百分比组成，其中组分A为4-羟