Com-pared with phenol refining, NMP solvent refining has the advantages of higher yield, good productquality and adapability for processing viscous oll.

• 与苯酚相比，NMP溶剂精制收率高，产品质量好，对加工稠油具有良好的适应性，通过采取措施，腐蚀问题已基本解决。