Patents Assigned to Zhejiang Lantian Environmental Protection Hi-Tech 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: 11549042Abstract: Disclosed is an environmentally friendly near-azeotropic mixed refrigerant, consisting essentially of HFO-1234 yf, HFE-143a and a third component, with the mass percentage of each component being: 70%-98% of HFO-1234yf, 1%-15% of HFE-143a and 1%-15% of the third component. The refrigerant of the present invention is environmentally friendly, excellent in thermodynamic properties, can directly realize drop-in substitution in an original system using HFC-134a without changing any parts, and can be used as a long term alternative to HFC-134a.Type: GrantFiled: September 3, 2021Date of Patent: January 10, 2023Assignees: ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI-TECH CO., LTD., SINOCHEM LANTIAN CO., LTD.Inventors: Zhikai Guo, Pinzan Xie, Xiaoqing Fang
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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: 11136483Abstract: Disclosed is an environmentally friendly near-azeotropic mixed refrigerant, consisting essentially of HFO-1234 yf, HFE-143a and a third component, with the mass percentage of each component being: 70%-98% of HFO-1234yf, 1%-15% of HFE-143a and 1%-15% of the third component. The refrigerant of the present invention is environmentally friendly, excellent in thermodynamic properties, can directly realize drop-in substitution in an original system using HFC-134a without changing any parts, and can be used as a long term alternative to HFC-134a.Type: GrantFiled: July 9, 2020Date of Patent: October 5, 2021Assignees: ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI-TECH CO., LTD., SINOCHEM LANTIAN CO., LTD.Inventors: Zhikai Guo, Pinzan Xie, Xiaoqing Fang
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Patent number: 10752819Abstract: Disclosed is an environmentally friendly near-azeotropic mixed refrigerant, consisting essentially of HFO-1234 yf, HFE-143a and a third component, with the mass percentage of each component being: 70%-98% of HFO-1234yf, 1%-15% of HFE-143a and 1%-15% of the third component. The refrigerant of the present invention is environmentally friendly, excellent in thermodynamic properties, can directly realize drop-in substitution in an original system using HFC-134a without changing any parts, and can be used as a long term alternative to HFC-134a.Type: GrantFiled: December 11, 2018Date of Patent: August 25, 2020Assignees: Zhejiang Lantian Environmental Protection Hi-Tech Co., Ltd., Sinochem Lantian Co., Ltd.Inventors: Zhikai Guo, Pinzan Xie, Xiaoqing Fang
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Patent number: 8530704Abstract: The present invention provides a preparation method of fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether by reacting CH2FX with 1,1,1,3,3,3-hexafluoroisopropanol in the presence of acid-binding agent. The reaction can be also preformed in the presence of solvent and/or phase-transfer catalyst. The present method has the advantages of simple reaction, manageable control condition, high material conversion and product yield, and the product can be easily separated. The obtained fluoromethyl 1,1,1,3,3,3-hexafluoroisoprophyl ether can be used as a safe inhalation anesthetics.Type: GrantFiled: August 25, 2009Date of Patent: September 10, 2013Assignee: Zhejiang Lantian Environmental Protection Hi-tech Co., Ltd.Inventors: Xu Weiguo, Hua Li
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Publication number: 20110257440Abstract: The present invention provides a preparation method of fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether by reacting CH2FX with 1,1,1,3,3,3-hexafluoroisopropanol in the presence of acid-binding agent. The reaction can be also preformed in the presence of solvent and/or phase-transfer catalyst. The present method has the advantages of simple reaction, manageable control condition, high material conversion and product yield, and the product can be easily separated. The obtained fluoromethyl 1,1,1,3,3,3-hexafluoroisoprophyl ether can be used as a safe inhalation anesthetics.Type: ApplicationFiled: August 25, 2009Publication date: October 20, 2011Applicant: ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI-TECH CO.,LTD.Inventors: Weiguo Xu, Hua LI
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Patent number: 7459101Abstract: The present invention discloses ternary mixtures of fluoroethane (HFC-161), pentafluoroethane (HFC-125) and difluoromethane (HFC-32) used as environmentally friendly alternative refrigerants to HCFC-22. The mass ratios of the mixture of each component are 5-60%, 25-50% and 5-50%, respectively. Its ODP is zero, with no depletion potential to the ozone layer. Its GWP is smaller than those of HCFC-22, R407C and R410A. Its working pressure and pressure ratio are close to those of HCFC-22. With few changes to system components, it can be used as a potential substitute refrigerant for HCFC-22.Type: GrantFiled: September 9, 2005Date of Patent: December 2, 2008Assignee: Zhejiang Lantian Environmental Protection Hi-Tech Co. Ltd.Inventors: Guangming Chen, Zhikal Guo, Xinzheng Guo, Yongmei Xuan