The crude dye is collected on a filter and then recrystallized from ethanol containing a small amount of piperidine . 粗染料过滤，然后在少量含有哌啶的乙醇中重结晶。
2.
N - methyl piperidine base 甲基氮杂环己烷
3.
Producer of piperazine , piperidine , pyridine , and related nitrogen - containing organic chemicals -开发生产和销售水溶性高分子材料：聚乙烯基吡咯烷酮系列产品。
4.
Study on the preparation and relationship between micro - structure and mechanical properties of epoxy / rubber / clay composites epoxy / rubber / clay composite has been prepared by the melted intercalation of octadyl ammonium exchanged montmorillonite ( c18 ) with dgeba and carboxyl - terminated butadiene - acrylonitrile random copolymers ( ctbn ) , and piperidine as the curing agent 环氧树脂橡胶粘土三元复合材料采用熔融共混法制备了环氧树脂橡胶粘土三元复合材料，就ctbn 、 c18含量、加料顺序和固化工艺等制备工艺对c18在三元复合材料结构以及材料的力学性能的影响进行了研究。
