公开(公告)号：US07989666B2

公开(公告)日：2011-08-02

申请号：US10573697

申请日：2004-09-24

申请人： Dongyi Hong ,  Jidong Zhou ,  Jinlai Qin ,  Xuelei Li ,  Zhenwei Yao ,  Hongjiang Zhang ,  Cuiyun Liu ,  Weihua Fan

发明人： Dongyi Hong ,  Jidong Zhou ,  Jinlai Qin ,  Xuelei Li ,  Zhenwei Yao ,  Hongjiang Zhang ,  Cuiyun Liu ,  Weihua Fan

IPC分类号： C07C39/16

CPC分类号： C07C37/74 ,  C07C37/20 ,  C07C37/84 ,  C07C39/16

摘要： The present invention discloses a method for preparing bisphenol A, comprising the following steps: transferring phenol and acetone into a reaction zone charged with condensation catalyst, obtaining a stream containing bisphenol A after reaction; transferring the obtained stream containing bisphenol A into a rectification zone, obtaining a product fraction primarily containing bisphenol A and phenol; and transferring the product fraction primarily containing bisphenol A and phenol into a crystallization zone to obtain a bisphenol A product; wherein a water-depleted fraction primarily containing phenol, bisphenol A and acetone is obtained from the rectification zone, and said water-depleted fraction is cooled and returned as a cycled stream to the reaction zone. Through cycling the water-depleted fraction to the reaction zone, the water content within the reaction zone can be reduced, the catalytic activity can be maintained and the reaction temperature rise can be controlled, thus the conversion of acetone and the selectivity of reaction can be improved accordingly.

摘要翻译： 本发明公开了一种制备双酚A的方法，包括以下步骤：将苯酚和丙酮转移到装有缩合催化剂的反应区中，反应后得到含有双酚A的物流; 将得到的含有双酚A的料流转移到精馏区中，得到主要含有双酚A和苯酚的产物馏分; 并将主要含有双酚A和苯酚的产物级分转移到结晶区中以获得双酚A产物; 其中从精馏区获得主要含有苯酚，双酚A和丙酮的贫水部分，并将所述贫水部分冷却并作为循环流返回到反应区。 通过将含水部分循环到反应区，可以降低反应区内的含水量，保持催化活性，控制反应温度升高，从而使丙酮的转化率和反应选择性可以为 相应改善。