新工艺包括萃取蒸馏区、脱气区、蒸馏区和溶剂回收区。
The new process consists of extractive distillation section, degassing section, distillation section and solvent recovery section.
产品通过三种方式得到：（1）滤液减压蒸馏，溶剂回收，残留物稀释于冷水或 冰水中，过滤得到；
The products are obtained by three means: (1) decompressing and distilling the filtrate, recovering the solvent, diluting the residual in the cold water or ice water and filtering;
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