公开(公告)号：US06509439B1

公开(公告)日：2003-01-21

申请号：US09549330

申请日：2000-04-14

申请人： Richard Allen Hayes ,  David N Marks ,  Maria Van Eijndhoven ,  Hari Babu Sunkara

发明人： Richard Allen Hayes ,  David N Marks ,  Maria Van Eijndhoven ,  Hari Babu Sunkara

IPC分类号： C08G6900

CPC分类号： C08G69/04 ,  C08G69/28

摘要： A process for producing polyamides from dinitriles and diamines in a continuous reaction using subsequent heating steps. In particular, the process involves contacting a dinitrile, a diamine, water, and optionally a catalyst to form a reaction mixture; heating the reaction mixture to a first elevated temperature of between about 180 to about 240° C., maintaining said temperature for about 0.10 to about 20 hours, and optionally controlling the pressure in this heating step by venting; heating the reaction mixture to a second elevated temperature of between about 250 to about 350° C., adding water to the reaction mixture before or after the second elevated temperature is reached, maintaining the pressure in the second heating step above atmospheric pressure by venting at least some of the water, and maintaining the second elevated temperature for a period of about 0.10 to about 10 hours; and recovering the polyamide.

摘要翻译： 使用随后的加热步骤在连续反应中由二腈和二胺生产聚酰胺的方法。 特别地，该方法包括使二腈，二胺，水和任选的催化剂接触以形成反应混合物; 将反应混合物加热至约180至约240℃的第一升高温度，将所述温度保持约0.10至约20小时，并且可选地通过排气控制该加热步骤中的压力; 将反应混合物加热至约250至约350℃的第二升高温度，在达到第二升高温度之前或之后向反应混合物中加入水，将第二加热步骤中的压力通过排气在 至少一些水，并保持第二升高温度约0.10至约10小时; 并回收聚酰胺。