摘要
合成了8种吡啶-2-甲酸盐,将其用作液相热分解六亚甲基二氨基甲酸正丁酯(HDU-B)制备1,6-六亚甲基二异氰酸酯(HDI)的催化剂,考察了其催化活性,实验结果表明吡啶-2-甲酸锌具有较好的催化性能。通过热分解实验确定了适宜的工艺条件:吡啶-2-甲酸锌为催化剂,适宜用量为HDU-B质量的1.0%～1.2%,真空度0.094MPa,反应温度260～270℃,在此条件下,HDI收率88.7%,时空产率282.8g/(gca·th),优于目前的文献报道结果。
The eight kinds of metal picolinates were synthesized and used as catalysts for the thermal decomposition of hexamethylene di-n-butylurethane （HDU-B） to prepare 1,6-hexamethylene diisocyanate （HDI） in the liquid phase . The experiment results showed that zinc picolinate had the highest catalystic activity .The optimum reaction conditions was obtained by thermal decomposition as following： zinc picolinate used as the catalyst （1.0%-1.2% by weight based on the weight of HDU-B） , vacuum pressure 0.094 MPa and reaction temperature 260-270℃. Under the above conditions, the HDI yield and time-space yield reached 88.7% and 282.8 g/（g cat·h） , respectively, which were superior to the reported data in the literatures.
出处
《精细化工中间体》
CAS
2007年第4期44-47,共4页
Fine Chemical Intermediates
