Dongke Zhao

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Yantai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Catalyst for preparing chlorine gas by hydrogen chloride oxidation,...
- Patent number 11,000,837
- Issue date May 11, 2021
- Wanhua Chemical Group Co., Ltd.
- Hongke Zhang
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method for replacement of phosgene synthesis column catalyst
- Patent number 10,046,289
- Issue date Aug 14, 2018
- WANHUA CHEMICAL GROUP CO., LTD
- Hongke Zhang
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Solvent refining method for isocyanate prepared by phosgene method...
- Patent number 9,840,462
- Issue date Dec 12, 2017
- Wanhua Chemical Group Co., Ltd.
- Hongke Zhang
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
CATALYST FOR PREPARING PHOSGENE AND PREPARATION METHOD THEREFOR, AN...
- Publication number 20220266237
- Publication date Aug 25, 2022
- Wanhua Chemical (Ningbo) Co., Ltd.
- Chao DONG
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Catalyst For Preparing Chlorine Gas By Hydrogen Chloride Oxidation,...
- Publication number 20190291087
- Publication date Sep 26, 2019
- WANHUA CHEMICAL GROUP CO., LTD.
- Hongke Zhang
- C01 - INORGANIC CHEMISTRY
Information Patent Application
METHOD FOR REPLACEMENT OF PHOSGENE SYNTHESIS COLUMN CATALYST
- Publication number 20170348661
- Publication date Dec 7, 2017
- WANHUA CHEMICAL GROUP CO., LTD.
- Hongke ZHANG
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
SOLVENT REFINING METHOD FOR ISOCYANATE PREPARED BY PHOSGENE METHOD...
- Publication number 20170022152
- Publication date Jan 26, 2017
- WANHUA CHEMICAL GROUP CO., LTD.
- Hongke Zhang
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL