公开(公告)号：US11673857B2

公开(公告)日：2023-06-13

申请号：US17448364

申请日：2021-09-22

申请人： ZHEJIANG RONGYAO BIOTECH CO., LTD.

发明人： Rener Chen ,  Na Zhang ,  Qiuhong Zhang

IPC分类号： C07C253/30 ,  C07C253/34 ,  B01J21/18 ,  B01J23/42 ,  B01J23/44

CPC分类号： C07C253/30 ,  B01J21/18 ,  B01J23/42 ,  B01J23/44 ,  C07C253/34

摘要： A preparation method of 1-(4-aminophenyl)cyclopentanecarbonitrile includes the following steps: step 1: in the presence of Li2CuCl4, adding a nitrochlorobenzene-zinc reagent dropwise to a 1-chlorocyclopentanecarbonitrile solution to prepare a compound 1-(4-nitrophenyl)cyclopentanecarbonitrile; and step 2: subjecting the compound 1-(4-nitrophenyl)cyclopentanecarbonitrile obtained in step 1 to a nitroreduction reaction under the action of a catalyst to prepare the compound 1-(4-aminophenyl)cyclopentanecarbonitrile. The preparation method involves cheap and easily-available raw materials, mild reaction conditions, and convenient operations, leads to high yield, and is environmentally-friendly and suitable for industrial large-scale production.

公开(公告)号：US09527801B2

公开(公告)日：2016-12-27

申请号：US14978556

申请日：2015-12-22

申请人： Zhejiang Rongyao Biotech CO., LTD.

发明人： Rener Chen ,  Fei Shi ,  Jianhua Chen ,  Na Zhang

IPC分类号： C07C231/02 ,  C07C201/08 ,  C07C201/12 ,  B01J19/18 ,  C01B17/94

CPC分类号： C07C231/02 ,  C01B17/94 ,  C07C201/08 ,  C07C201/12 ,  C07C205/57

摘要： A process and a device for recycling waste acid produced in the process of producing Zoalene. The process comprises steps: heating, depressurizing and distilling the waste acid recycled after nitration reaction; collecting acid liquid A and distilled water A; mixing the acid liquid A with new concentrated sulfuric acid in proportion, and putting the mixture to a new Zoalene nitration reaction process; and putting the distilled water A into a diluting pot for diluting the liquid produced in the nitration reaction. The waste acid produced in the process of producing Zoalene is recycled and not directly discharged; water resources are recycled, waste of the water resources is reduced, and discharge of waste water produced in the process of producing Zoalene is greatly reduced, so that not only production cost is saved, but also environment pressure is reduced.

摘要翻译： 用于回收在生产Zoalene过程中产生的废酸的方法和装置。 该方法包括以下步骤：对硝化反应后再循环的废酸进行加热，减压和蒸馏; 收集酸性液体A和蒸馏水A; 将酸性液体A与新的浓硫酸成比例混合，并将混合物置于新的Zoalene硝化反应过程中; 并将蒸馏水A放入用于稀释硝化反应中产生的液体的稀释罐中。 在生产Zoalene过程中产生的废酸被回收利用，不能直接排放; 水资源循环利用，水资源浪费减少，生产Zoalene过程中产生的废水排放量大大减少，不仅节省了生产成本，而且降低了环境压力。