Patents Assigned to ZHEJIANG RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTD
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Patent number: 11878290Abstract: Disclosed is a method for reducing carbon deposits on a catalyst in recycling HFC-23. The recycling is realized by means of a fluorine-chlorine exchange reaction with HFC-23 and a halogenated hydrocarbon. The catalyst for the fluorine-chlorine exchange reaction comprises a main body catalyst and a precious metal. The precious metal is selected from at least one of Pt, Pd, Ru, Au or Rh, and has an addition amount of 0.01-2 wt %. During the fluorine-chlorine exchange reaction, hydrogen gas is introduced. The invention has advantages of good catalyst stability, long life, etc.Type: GrantFiled: February 24, 2020Date of Patent: January 23, 2024Assignees: SINOCHEM LANTIAN CO., LTD., ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI-TECH CO., LTD., ZHEJIANG RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTD.Inventors: Jianjun Zhang, Wenfeng Han, Shucheng Wang, Wucan Liu, Feixiang Zhou
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Patent number: 11254642Abstract: The present invention provides a method for the preparing of 2-chloro-5-trifluoromethylpyridine, comprising two steps of chlorofluorination reaction and chlorination reaction, the chlorination catalyst used in the chlorination reaction was chosen from a fluoride, an oxide, a hydroxide, a carbonate, or a chloride of magnesium, calcium and barium and a supported palladium catalyst; or under the action of at least one catalyst chosen from ZSM-5, 5A, ? and 13× molecular sieves, 3-trifluoromethylpyridine and chlorine gas phase have reaction to obtain 2-chloro-5-trifluoromethylpyridine. Or, under the action of a catalyst chosen from a fluoride, an oxide, a hydroxide, a carbonate, or a chloride of magnesium, calcium, and barium and a supported palladium catalyst, 3-trifluoromethylpyridine and chlorine gas phase have reaction to obtain 2-chloro-5-trifluoromethylpyridine.Type: GrantFiled: December 5, 2018Date of Patent: February 22, 2022Assignees: ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI-TECH CO., LTD., ZHEJIANG RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTD., SINOCHEM LANTIAN CO., LTD.Inventors: Wanjin Yu, Shengda Lin, Minyang Liu, Wucan Liu, Jianjun Zhang, Xianjin Chen
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Patent number: 11186546Abstract: The present invention discloses a method for preparing 2,3-dichloro-5-trifluoromethylpyridine, comprising at a temperature of 100˜150° C. and a pressure of 0.5˜5.0 MP, in presence of at least one catalyst selected from supported metal chloride, supported zeolite molecular sieve and supported heteropolyacid, 2-chloro-5-trifluoromethylpyridine reacts with chlorine gas to obtain 2,3-dichloro-5-trifluoromethylpyridine. The preparing method provided by the present invention has advantages such as high selectivity of desired product, high utilization rate of chlorine gas, moderate process condition, simple operation and less three wastes. The present invention also discloses a preparing method for preparing 2-chloro-5-trifluoromethylpyridine, which is capable of reducing unit consumption, reducing separation cost, and improving safety compared to the prior art.Type: GrantFiled: December 5, 2018Date of Patent: November 30, 2021Assignees: Zhejiang Lantian Environmental Protection Hi-Tech Co., Ltd., Zhejiang Research Institute of Chemical Industry Co., Ltd., Sinochem Lantian Co., Ltd.Inventors: Wanjin Yu, Shengda Lin, Minyang Liu, Wucan Liu, Jianjun Zhang, Xianjin Chen
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Patent number: 11104648Abstract: A pyrazole derivative having the following formula stru-1: The pyrazole derivative is used for prevention and control of pests.Type: GrantFiled: May 22, 2018Date of Patent: August 31, 2021Assignees: ZHEJIANG RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTD., SINOCHEM LANTIAN CO., LTD.Inventors: Tianming Xu, Jiahua Xing, Liangkun Zhong, Dongsong Hu, Youchang Wei, Hongying Huang, Jiping Yu, Weili Peng
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Patent number: 10953256Abstract: Disclosed is a composition comprising: (A) at least one fluorine-containing ketone; and (B) an effective amount of stabilizer which is selected from at least one of the group consisting of an epoxy compound, a nitro compound, a hindered phenolic compound, a ?-diketone compound, a phosphite compound, a salicylate compound, a cinnamate compound, a hydroxybenzophenone compound, a hydroxybenzoic acid compound, an alkoxy methane compound, and an organic thio compound. The composition provided by the present invention has stable performance, and can be used as a fire extinguishing agent, a heat transfer medium, etc.Type: GrantFiled: March 16, 2018Date of Patent: March 23, 2021Assignees: Sinochem Lantian Co., Ltd, ZHEJIANG RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTDInventors: Hang Ni, Xia Luo
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Publication number: 20180200553Abstract: Disclosed is a composition comprising: (A) at least one fluorine-containing ketone; and (B) an effective amount of stabilizer which is selected from at least one of the group consisting of an epoxy compound, a nitro compound, a hindered phenolic compound, a ?-diketone compound, a phosphite compound, a salicylate compound, a cinnamate compound, a hydroxybenzophenone compound, a hydroxybenzoic acid compound, an alkoxy methane compound, and an organic thio compound, The composition provided by the present invention has stable performance, and can be used as a fire extinguishing agent, a heat transfer medium, etc.Type: ApplicationFiled: March 16, 2018Publication date: July 19, 2018Applicants: Sinochem Lantian Co., Ltd, ZHEJIANG RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTDInventors: Hang Ni, Xia Luo