1. Polynionic celluloses were preparated by alkalify and etherify of refining cotton.The degree of replacement of the polynionic cellulosesis was high.The radicals of replacement were distributed evenly.
   采用精制棉经过碱化、醚化得到高取代度且取代基均匀分布的聚阴离子纤维素产品。
2. This paper introduces the light gaso line etherify technology,brings fo rward the project of building the light gasoline etherify device on th e catalyst cracking cell in the refin ery plant.
   介绍了轻汽油醚化技术,提出了在炼油厂催化裂化单元建设轻汽油醚化装置的方案。

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