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低沸点溶剂加压催化热解制备六亚甲基-1,6-二异氰酸酯
Authors
廖丹葵
曹妍
+4 more
李会泉
李新涛
覃宁波
黄科林
Publication date
1 January 2013
Publisher
Abstract
以低沸点氯苯为溶剂,在加压条件下进行了六亚甲基-1,6-二氨基甲酸甲酯(HDC)液相催化热解制备六亚甲基-1,6-二异氰酸酯(HDI)的研究;通过TG-DTG技术对HDC热解过程进行了分析,筛选了催化剂,优化了工艺条件,并通过原位FTIR技术推测了HDC的催化热解机理。实验结果表明,HDC热解制备HDI分两步完成;优化的反应条件为:采用Co2O3催化剂、反应温度230℃、HDC含量为溶剂质量的2.5%、催化剂用量为HDC质量的5%、N2流量为600 mL/min、反应时间3 h,在此条件下,HDC的转化率可达100%、HDI收率可达83%左右。机理研究推测:Co2O3催化剂是通过进攻HDC的氨基甲酸甲酯基团上的C=O双键,最终使酯基断裂形成异氰酸根基团
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Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
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Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
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oai:ir.ipe.ac.cn:122111/44258
Last time updated on 11/04/2021
Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
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oai:ir.ipe.ac.cn:122111/10379
Last time updated on 09/11/2016