连续聚醯胺化制程;CONTINUOUS POLYAMIDATION PROCESS-II

摘要

本发明提供一种用于制造聚醯胺之连续制程，该制程包含以下步骤：(i)使包含熔融二羧酸或包含二羧酸及二胺之富含熔融二羧酸之混合物的流A流过垂直多阶段反应器之第一阶段及至少另外一个反应阶段，其中该第一阶段系处于该反应器之顶部；(ii)使包含二胺之流B以蒸气或富含二胺之液体形式逆向流过该垂直多阶段反应器之该第一反应阶段下方的阶段中之至少一者；(iii)在该反应器之最终阶段及/或在该反应器之该最终阶段下方积聚包含聚醯胺之液相材料P；其中该反应器具有适用于实现逆向流动的流A与B之间之接触之内部特征；及其中该制程进一步包含藉由直接控制聚醯胺化反应之化学平衡或藉由控制流B使得在该制程期间引入该反应器中之二胺及二羧酸的量为化学计量不平衡来控制该液相材料P之黏度。本发明进一步提供经组态以实施该制程之垂直多阶段反应器。; (ii) counter-currently flowing a stream B comprising a diamine as either a vapour or a diamine-rich liquid through at least one of the stages below the first reaction stage of said vertical multistage reactor; (iii) accumulating a liquid phase material P comprising polyamide at and/or below the final stage of said reactor; wherein said reactor is equipped with internal features suitable for effecting contact between counter-currently flowing streams A and B; and wherein the process further comprises controlling the viscosity of said liquid phase material P by directly controlling the chemical equilibrium of the polyamidation reaction or by controlling stream B so that the amounts of diamine and dicarboxylic acid introduced into the reactor during the process are stoichiometrically imbalanced. The invention further provides a vertical multistage reactor configured to implement said process.