公开(公告)号：US20190291087A1

公开(公告)日：2019-09-26

申请号：US16306363

申请日：2016-08-05

Applicant: Wanhua Chemical Group Co., Ltd.

Inventor： Hongke Zhang ,  Bo Zhou ,  Zhangwei Zai ,  Dan Xu ,  Yu Yao ,  Yanlong Xu ,  Dongke Zhao ,  Jingjing Yang ,  Jiansheng Ding ,  Weiqi Hua

IPC: B01J29/16 ,  B01J37/04 ,  B01J37/02 ,  B01J37/00 ,  B01J37/08 ,  B01J29/48 ,  C01B7/04 ,  B01J35/10 ,  B01J35/02

Abstract: A catalyst for preparing chlorine gas by hydrogen chloride oxidation, comprising the following components calculated according to mass content based on the total weight of the catalyst: 0.5-20 wt % copper; 2-10 wt % manganese; 0.05-2 wt % boron; 0.01-3 wt % chromium; 0.1-10 wt % rare earth metal; 0.1-10 wt % potassium; and 3-15 wt % titanium; also comprising 0.02-1.1 wt % phosphorus; and 0.03-1.9 wt % iron; the carrier content is 55-90 wt %. In the case of a fluidized bed reactor, the present catalyst can achieve a one-way hydrogen chloride conversion rate of 80-85%. Almost all of the 0-1000 mg/kg of chlorinated benzene contained in hydrogen chloride gas can be converted into CO2 and H2O without generating polychlorinated benzene.

公开(公告)号：US20170022152A1

公开(公告)日：2017-01-26

申请号：US15301132

申请日：2014-04-11

Applicant: Wanhua Chemical Group Co., Ltd.

Inventor： Hongke Zhang ,  Yu Yao ,  Dongke Zhao ,  Weiqi Hua ,  Bin Chen ,  Dekai Shi ,  Qinglong Chen ,  Dan Xu ,  Yang Wang ,  Qile Shi

IPC: C07C263/20 ,  B01D15/10

CPC classification number: C07C263/20 ,  B01D15/00 ,  B01D15/10 ,  C07C263/10 ,  C07C265/14

Abstract: A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt—Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.

Abstract translation: 通过光气法制备的异氰酸酯的溶剂精制方法和用于其的多级吸收塔。 含有水，铁和/或光气，氯化氢和其他颜色的材料的精制溶剂通过本方法和多级吸收塔来处理，这可以有效地防止干燥剂吸收水和硬化，部分过热 塔和生成渠道。 同时，压降有效降低。 此外，水的含量≤50ppm，铁的含量≤5ppm，光气和氯化氢的含量≤20ppm，精制溶剂中的Pt-Co色度≤20。 因此，可以将精制溶剂用作光气法制备异氰酸酯的溶剂，并显着提高异氰酸酯的L色。

公开(公告)号：US09840462B2

公开(公告)日：2017-12-12

申请号：US15301132

申请日：2014-04-11

Applicant: Wanhua Chemical Group Co., Ltd.

Inventor： Hongke Zhang ,  Yu Yao ,  Dongke Zhao ,  Weiqi Hua ,  Bin Chen ,  Dekai Shi ,  Qinglong Chen ,  Dan Xu ,  Yang Wang ,  Qile Shi

IPC: C07C263/00 ,  C07C263/20 ,  C07C263/10 ,  B01D15/00 ,  B01D15/10

CPC classification number: C07C263/20 ,  B01D15/00 ,  B01D15/10 ,  C07C263/10 ,  C07C265/14

Abstract: A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt—Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.

公开(公告)号：US12226761B2

公开(公告)日：2025-02-18

申请号：US17623096

申请日：2019-09-02

Applicant: WANHUA CHEMICAL (NINGBO) CO., LTD. ,  WANHUA CHEMICAL GROUP CO., LTD.

Inventor： Chao Dong ,  Dongke Zhao ,  Yujie Zhou ,  Chaoqun Li ,  Fang Wen ,  Wenbo Wang ,  Hongke Zhang ,  Dan Xu ,  Chong Li ,  Jie Shi

IPC: B01J37/34 ,  B01J6/00 ,  B01J21/18 ,  B01J37/02 ,  B01J37/08 ,  C01B32/80

Abstract: 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.

公开(公告)号：US11000837B2

公开(公告)日：2021-05-11

申请号：US16306363

申请日：2016-08-05

Applicant: Wanhua Chemical Group Co., Ltd.

Inventor： Hongke Zhang ,  Bo Zhou ,  Zhangwei Zai ,  Dan Xu ,  Yu Yao ,  Yanlong Xu ,  Dongke Zhao ,  Jingjing Yang ,  Jiansheng Ding ,  Weiqi Hua

IPC: B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/12 ,  B01J21/16 ,  B01J21/18 ,  B01J23/00 ,  B01J23/10 ,  B01J23/26 ,  B01J23/34 ,  B01J23/83 ,  B01J23/86 ,  B01J23/889 ,  B01J29/46 ,  B01J29/48 ,  B01J29/16 ,  B01J35/02 ,  B01J35/10 ,  C01B7/04 ,  B01J37/00 ,  B01J37/02 ,  B01J37/04 ,  B01J37/08

Abstract: A catalyst for preparing chlorine gas by hydrogen chloride oxidation, comprising the following components calculated according to mass content based on the total weight of the catalyst: 0.5-20 wt % copper; 2-10 wt % manganese; 0.05-2 wt % boron; 0.01-3 wt % chromium; 0.1-10 wt % rare earth metal; 0.1-10 wt % potassium; and 3-15 wt % titanium; also comprising 0.02-1.1 wt % phosphorus; and 0.03-1.9 wt % iron; the carrier content is 55-90 wt %. In the case of a fluidized bed reactor, the present catalyst can achieve a one-way hydrogen chloride conversion rate of 80-85%. Almost all of the 0-1000 mg/kg of chlorinated benzene contained in hydrogen chloride gas can be converted into CO2 and H2O without generating polychlorinated benzene.