聚醚醚酮精制工艺及设备的设计与运行

聚醚醚酮生产过程中,反应产物、原料、溶剂及副产物混合在一起,为了得到纯的聚醚醚酮需对其聚合产物进行精制。针对现行生产工艺流程较长、能耗及水耗较大的特点,依据实验数据,对现行工艺、设备进行改进。将分散的、单一功能设备综合在一起,先经丙酮浸取,除去溶剂二苯砜;再经水洗除去氟盐等水溶性物质;最后经过真空转筒干燥得到纯物料,上述3步精制过程在同一设备中实现。使用改进后设备进行生产,聚醚醚酮精制时间为22 h,并且干燥后物料含水质量分数达到0.02%,物料的粉化率也仅为2.85%。经实际生产证明,改进后工艺集中,操作简化,精制时间较原工艺缩短31 h,同时降低了能耗,节约超纯水用量,较大程度地提高了生产效率。

Design and operation for process and equipment of polyetheretherketone refining

In the process of polyetheretherketone(PEEK) production,reaction products,raw materials,solvents and by-products are mixed together.In order to get the pure PEEK,the polymerization product must be refined.Due to the longer process flow and higher consumption of energy and water,the current process and equipment were improved based on experimental data.The dispersed equipment with single function was integrated together.Firstly,solvent diphenyl sulfone was removed by acetone extraction;then fluoride salts and other water soluble substances were removed through water washing;finally,the pure material was obtained after vacuum drum drying.The above three steps of refining process were performed in the same equipment.Using the improved equipment,the time of PEEK refining is 22 h,the moisture mass fraction of material after drying reaches 0.02%,and the material powdering rate is only 2.85%.The practice shows that the improved technology is featured by concentrated process and simple operation,which shortens the refining time by 31 h,reduces energy and water consumption,and greatly improves the production efficiency.