改良Hofmann法制备聚乙烯胺研究

Preparation of polyvinylamine（PVAm）by modified Hofmann degradation

摘要:

本文研究采用Hofmann法制备聚乙烯胺（PVAm）技术，考察了物料比、反应温度和加料方式等条件对聚乙烯胺收率和氨化度的影响，研究碱性反应母液的回收循环利用。研究表明，使用商品化非离子型聚丙烯酰胺（PAM）作为原料，可得到胺化度达84.54%聚乙烯胺产品，回收的碱液可循环使用3次。反应采取将聚丙烯酰胺直接加入NaClO和NaOH溶液中制备聚丙烯酰胺氯胺化产物的加料操作方式，再加入碱溶液中进行重排反应，提高单位体积反应液中产品生产量。

Abstract:

This paper is research on Hofmann degradation to prepare polyvinylamine (PVAm) . Material ratio, reaction temperature, addition mode and other reaction conditions which have effect on amination degrees were discussed as well as recycle of the mixed solution containing alcohol and base. Results show that the amination degrees of product is 84.54% by using Commercial nonionic polyacrylamide (PAM) , the base solution recycling from the mixture can be used 3 times. In this modified Hofmann degradation,polyacrylamide was added into NaClO and NaOH solution direactly to make chloro- polyacrylamide, then put it into base solution,in order to increase yield per volume solution.