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    CATALYST FOR PREPARING PHOSGENE AND PREPARATION METHOD THEREFOR, AND METHOD FOR PREPARATION OF PHOSGENE AND COMPREHENSIVE UTILIZATION OF ENERGY THEREOF
    1.
    发明公开
    CATALYST FOR PREPARING PHOSGENE AND PREPARATION METHOD THEREFOR, AND METHOD FOR PREPARATION OF PHOSGENE AND COMPREHENSIVE UTILIZATION OF ENERGY THEREOF 审中-公开

    公开(公告)号：EP3971135A1

    公开(公告)日：2022-03-23

    申请号：EP19942869.9

    申请日：2019-09-02

    申请人： Wanhua Chemical (Ningbo) Co., Ltd. ,  Wanhua Chemical Group Co., Ltd.

    发明人： DONG, Chao ,  ZHAO, Dongke ,  ZHOU, Yujie ,  LI, Chaoqun ,  WEN, Fang ,  WANG, Wenbo ,  ZHANG, Hongke ,  XU, Dan ,  LI, Chong ,  SHI, Jie

    IPC分类号： C01B32/80 ,  B01J27/22

    摘要： Provided in the invention are a catalyst for preparing phosgene and a preparation method therefor, and a method for the preparation of phosgene and the comprehensive utilization of energy thereof. The preparation method comprises the following steps: 1) stirring and soaking activated carbon in a modifying solution, then adding dimethyltin dichloride and chromium oxide powders and carrying out a reaction, and then adding a nickel oxide fine powder and ultrasonically oscillating same to prepare a pre-modified activated carbon; 2) drying the pre-modified activated carbon; and 3) heating and calcinating the dried pre-modified activated carbon from step 2) to prepare the catalyst. Based on the preparation method, thin layers are formed on the surface of the catalyst by bonding chromium tin phosphate and chromium tin silicate with Ni by means of -O-Ni-O-, respectively, which can improve the high-temperature resistance and oxidation resistance of the activated carbon, and improve the safe and stable operation level of a device. The aim of integrated comprehensive utilization of energy is achieved by coupling phosgene production with an evaporation and concentration process of brine and using steam as a heat source for evaporation and concentration of the brine.

    METHOD FOR REPLACEMENT OF PHOSGENE SYNTHESIS COLUMN CATALYST
    3.
    发明公开
    METHOD FOR REPLACEMENT OF PHOSGENE SYNTHESIS COLUMN CATALYST 有权
    磷合成柱催化剂替代方法

    公开(公告)号：EP3243563A1

    公开(公告)日：2017-11-15

    申请号：EP15876495.1

    申请日：2015-01-16

    申请人： Wanhua Chemical Group Co., Ltd.

    发明人： ZHANG, Hongke ,  YAO, Yu ,  ZHAO, Dongke ,  CAO, Guanyi ,  LIU, Xiaogao ,  CAO, Younian ,  LI, Chong ,  MA, Yabo

    IPC分类号： B01J8/06

    摘要： The present invention discloses a method of quickly desorbing phosgene from a catalyst in a phosgene synthesizing tower when the catalyst in the phosgene synthesizing tower is replaced. The method is carried out by first purging out easily-desorbed phosgene from the catalyst activated carbon in the phosgene synthesizing tower with nitrogen gas, then purging with ammonia gas, and the ammonia gas is reacted with the hardly-desorbed phosgene in the catalyst of the phosgene synthesizing tower. Then the phosgene synthesizing tower is rinsed with a water gun and then dried with hot gas. The phosgene content at an outlet of the phosgene synthesizing tower after purging is below 0.5 ppm, which can significantly save the time of the phosgene synthesizing tower for purging the phosgene, greatly reduce the amount of nitrogen gas consumed, and improve the safety of the process operation.

    摘要翻译： 本发明公开了一种在光气合成塔中的催化剂被更换时，从光气合成塔中的催化剂快速解吸光气的方法。 该方法首先用氮气从光气合成塔中的催化剂活性炭中清除容易脱附的光气，然后用氨气吹扫，并使氨气与催化剂中的难解吸的光气在 光气合成塔。 然后用水枪冲洗光气合成塔，然后用热气干燥。 净化后光气合成塔出口处的光气含量低于0.5ppm，可大大节省光气合成塔净化光气的时间，大大减少氮气消耗量，提高工艺安全性 操作。