端氨基聚醚的合成

Synthesis of Amine-Terminated Polyether

研究了以改性雷尼镍为催化剂、聚醚和液氨为原料,临氢高压催化氨化制备端氨基聚醚的工艺路线,考察了反应温度、催化剂用量、氨醇比、氢醇比对反应的影响。结果表明,温度220℃、氨醇摩尔比10～12、氢醇摩尔比0.6～0.8、催化剂质量分数为7%～11%、反应时间4～5 h时,聚醚氨化制备端氨基聚醚的转化率大于97%。

High pressure catalytic amination of polyether to amine-terminated polyether was studied in the presence of modified Raney Ni catalyst, polyether and liquid ammonia. The reaction factors, including temperature, the amount of catalyst, ratio of ammonia to hydroxyl and ratio of hydrogen to hydroxyl were investigated. The optimized conditions were obtained by experiment. The best process condition was temperature 220℃, the ratio of ammonia to hydroxyl 10 - 12, the ratio of hydrogen to hydroxyl 0. 6 - 0. 8, the catalyst content 7% - 11% and the reaction time 4 -5 h. The conversion of oolvether could be up to 97%.