Patents by Inventor Yongchang Zhao
Yongchang Zhao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240142175Abstract: Disclosed are an unblocking apparatus for a furnace discharging pipe and a use method. The unblocking apparatus includes a rail, a rail car that may move along the rail, an unblocking drive mechanism arranged on the rail car, a heat-unblocking component, a cold-unblocking component, and a material receiving component that is used to receive a blocking material in the discharging pipe, and a drive end of the unblocking drive mechanism is detachably connected with one end of the heat-unblocking component and the cold-unblocking component respectively. The present application effectively handles different blockage situations of the furnace discharging pipe by connecting the unblocking drive mechanism with an unblocking rod capable of heat-unblocking and a drilling rod capable of cold-unblocking, thereby two modes of heat-unblocking and cold-unblocking are performed on the furnace discharging pipe; and the discharging pipe may be unblocked by a remote operation.Type: ApplicationFiled: October 23, 2023Publication date: May 2, 2024Applicants: China Nuclear Sichuan Environmental Protection Engineering Co., Ltd., China Building Materials Academy, China Nuclear Power Engineering Co., Ltd.Inventors: Weidong XU, Yu CHANG, Yongchang ZHU, Hong DUAN, Chunyu TIAN, Wei WU, Debo YANG, Qingbin ZHAO, Shuaizhen WU, Lin WANG, Zhu CUI, Heyi GUO, Maosong FAN, Yuancheng SUN, Jie MEI, Xiaoli AN, Yongxiang ZHAO, Qinda LIU
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Patent number: 10253001Abstract: The present invention discloses a method for preparing azoxystrobin intermediates represented by formulae (1) and (2), comprising: controlling a compound represented by formula (3) to contact with sodium methoxide and 4,6-dichloropyrimidine, to obtain a mixture of intermediates represented by formulae (1) and (2), in the existence of a catalyst, the catalyst is an azabicyclic compound or its salt. The present invention further discloses a method for preparing azoxystrobin, comprising: controlling the intermediate represented by formula (2) provided in the present invention to react with 2-cyanophenol or its salt under the catalytic action of an azabicyclic compound or its salt, to obtain an azoxystrobin compound represented by formula (4). The method provided in the present invention has advantages including high transformation ratio, high product purity, easy and convenient operation, and environmental friendliness.Type: GrantFiled: January 19, 2018Date of Patent: April 9, 2019Assignees: Nutrichem Company Limited, Shangyu Nutrichem Co., LTD.Inventors: Jianwei Chen, Wenjun Wang, Jianhong Chi, Yongchang Zhao, Xufang Deng, Long Wang, Wentao Jin, Guobin Chen
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Publication number: 20180141918Abstract: The present invention discloses a method for preparing azoxystrobin intermediates represented by formulae (1) and (2), comprising: controlling a compound represented by formula (3) to contact with sodium methoxide and 4,6-dichloropyrimidine, to obtain a mixture of intermediates represented by formulae (1) and (2), in the existence of a catalyst, the catalyst is an azabicyclic compound or its salt. The present invention further discloses a method for preparing azoxystrobin, comprising: controlling the intermediate represented by formula (2) provided in the present invention to react with 2-cyanophenol or its salt under the catalytic action of an azabicyclic compound or its salt, to obtain an azoxystrobin compound represented by formula (4). The method provided in the present invention has advantages including high transformation ratio, high product purity, easy and convenient operation, and environmental friendliness.Type: ApplicationFiled: January 19, 2018Publication date: May 24, 2018Applicants: Nutrichem Company Limited, Shangyu Nutrichem CO., LTD.Inventors: Jianwei Chen, Wenjun Wang, Jianhong Chi, Yongchang Zhao, Xufang Deng, Long Wang, Wentao Jin, Guobin Chen
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Patent number: 9920015Abstract: The present invention discloses a method for preparing azoxystrobin intermediates represented by formulae (1) and (2), comprising: controlling a compound represented by formula (3) to contact with sodium methoxide and 4,6-dichloropyrimidine, to obtain a mixture of intermediates represented by formulae (1) and (2), in the existence of a catalyst, the catalyst is an azabicyclic compound or its salt. The present invention further discloses a method for preparing azoxystrobin, comprising: controlling the intermediate represented by formula (2) provided in the present invention to react with 2-cyanophenol or its salt under the catalytic action of an azabicyclic compound or its salt, to obtain an azoxystrobin compound represented by formula (4). The method provided in the present invention has advantages including high transformation ratio, high product purity, easy and convenient operation, and environmental friendliness.Type: GrantFiled: March 11, 2014Date of Patent: March 20, 2018Assignees: NUTRICHEM COMPANY LIMITED, SHANGYU NUTRICHEM CO., LTD.Inventors: Jianwei Chen, Wenjun Wang, Jianhong Chi, Yongchang Zhao, Xufang Deng, Long Wang, Wentao Jin, Guobin Chen
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Patent number: 9611226Abstract: Disclosed in the present invention is a preparation method of azoxystrobin having a structure as shown by formula (1), the method comprising: a) performing an etherification reaction by reacting the compound having a structure shown by formula (2) with 2-cyanophenol and/or a salt thereof under the catalysis of an azabicyclo tertiary amine compound and/or a salt thereof as the catalyst in a butyl acetate medium to obtain a butyl acetate solution containing azoxystrobin; and b) cooling the butyl acetate solution containing azoxystrobin to precipitate Azoxystrobin having a structure as shown by formula (1) from the butyl acetate solution. Using the method provided by the present invention to prepare azoxystrobin can significantly improve the yield of azoxystrobin, and can obtain azoxystrobin products having high purity.Type: GrantFiled: March 20, 2014Date of Patent: April 4, 2017Assignees: Nutrichem Company Limited, Shanqyu Nutrichem Co., Ltd.Inventors: Wenjun Wang, Jianwei Chen, Jianhong Chi, Yongchang Zhao, Xufang Deng, Long Wang, Hua'nan You
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Patent number: 9556128Abstract: The present invention relates to a method for preparing an acrylate compound. The acrylate compound has a structure as shown in formula (I). The method includes: subjecting a compound with a structure of formula (II) or a mixture of compounds with structures of formula (I) and formula (II), and a catalyst to a contact reaction in the absence of an anhydride, and removing the resulting methanol by pressure reduced distillation during the contact reaction process. In the formulas (I) and (II), R is selected from one of: an alkoxy with a carbon number of 1-5, a substituent-containing phenoxyl with a carbon number of 6-20, a substituent-containing heteroaryloxy with a carbon number of 4-20, a substituent-containing heteroaryloxymethyl with a carbon number of 4-20, a substituent-containing phenoxymethyl with a carbon number of 5-20, and a substituent-containing alkyl with a carbon number of 2-20.Type: GrantFiled: March 20, 2014Date of Patent: January 31, 2017Assignees: NUTRICHEM COMPANY LIMITED, SHANGYU NUTRICHEM CO., LTD.Inventors: Xufang Deng, Wenjun Wang, Jianwei Chen, Yongchang Zhao, Jianhong Chi, Long Wang, Hua'nan You
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Publication number: 20160200687Abstract: The present invention discloses a method for preparing azoxystrobin intermediates represented by formulae (1) and (2), comprising: controlling a compound represented by formula (3) to contact with sodium methoxide and 4,6-dichloropyrimidine, to obtain a mixture of intermediates represented by formulae (1) and (2), in the existence of a catalyst, the catalyst is an azabicyclic compound or its salt. The present invention further discloses a method for preparing azoxystrobin, comprising: controlling the intermediate represented by formula (2) provided in the present invention to react with 2-cyanophenol or its salt under the catalytic action of an azabicyclic compound or its salt, to obtain an azoxystrobin compound represented by formula (4). The method provided in the present invention has advantages including high transformation ratio, high product purity, easy and convenient operation, and environmental friendliness.Type: ApplicationFiled: March 11, 2014Publication date: July 14, 2016Inventors: Jianwei CHEN, Wenjun WANG, Jianhong CHI, Yongchang ZHAO, Xufang DENG, Long WANG, Wentao JIN, Guobin CHEN
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Publication number: 20160137611Abstract: The present invention relates to a method for preparing an acrylate compound. The acrylate compound has a structure as shown in formula (I). The method includes: subjecting a compound with a structure of formula (II) or a mixture of compounds with structures of formula (I) and formula (II), and a catalyst to a contact reaction in the absence of an anhydride, and removing the resulting methanol by pressure reduced distillation during the contact reaction process. In the formulas (I) and (II), R is selected from one of: an alkoxy with a carbon number of 1-5, a substituent-containing phenoxyl with a carbon number of 6-20, a substituent-containing heteroaryloxy with a carbon number of 4-20, a substituent-containing heteroaryloxymethyl with a carbon number of 4-20, a substituent-containing phenoxymethyl with a carbon number of 5-20, and a substituent-containing alkyl with a carbon number of 2-20.Type: ApplicationFiled: March 20, 2014Publication date: May 19, 2016Inventors: XUFANG DENG, WENJUN WANG, JIANWEI CHEN, YONGCHANG ZHAO, JIANHONG CHI, LONG WANG, HUA'NAN YOU
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Publication number: 20160090365Abstract: Disclosed in the present invention is a preparation method of azoxystrobin having a structure as shown by formula (1), the method comprising: a) performing an etherification reaction by reacting the compound having a structure shown by formula (2) with 2-cyanophenol and/or a salt thereof under the catalysis of an azabicyclo tertiary amine compound and/or a salt thereof as the catalyst in a butyl acetate medium to obtain a butyl acetate solution containing azoxystrobin; and b) cooling the butyl acetate solution containing azoxystrobin to precipitate Azoxystrobin having a structure as shown by formula (1) from the butyl acetate solution. Using the method provided by the present invention to prepare azoxystrobin can significantly improve the yield of azoxystrobin, and can obtain azoxystrobin products having high purity.Type: ApplicationFiled: March 20, 2014Publication date: March 31, 2016Inventors: Wenjun Wang, Jianwei Chen, Jianhong Chi, Yongchang Zhao, Xufang Deng, Long Wang, Hua'nan You