Patents by Inventor Zhirong Chen

Zhirong Chen 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).

  • Publication number: 20210087133
    Abstract: The present disclosure relates to a method for preparing isophorone diamine by means of a hydrogenation reduction of isophorone nitrile imine. The hydrogenation reduction is continuously carried out in a multi-stage bubble column reactor loaded with a supported alkaline cobalt-based catalyst, wherein isophorone nitrile imine is successively in countercurrent contact with hydrogen in each stage of the reactor to carry out a hydrogenation reduction reaction, so as to obtain the isophorone diamine. The preparation method solves the problem of back-mixing, and further improves the conversion rate and the cis/trans ratio of the product.
    Type: Application
    Filed: November 30, 2018
    Publication date: March 25, 2021
    Inventors: Zhirong CHEN, Jianyong MAO, Baishan HU, Guanbing LI, Haoran LI, Yu WANG, Yingkuo YANG, Qing LIU, Jiyu TANG, Weiyong CHEN
  • Publication number: 20210047471
    Abstract: The disclosure relates to a high molecular weight polyphenylene sulfide resin and a preparation method and application thereof. The disclosure uses a sulfur-containing compound and a halogenated aromatic compound as raw materials, an alkaline compound and a fatty acid as polycondensation aids to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained. Then, the primary polyphenylene sulfide reacts with a chain extender at a high temperature to form a high molecular weight polyphenylene sulfide resin. The preparation method of the disclosure has the advantages of high yield, low cost, and is capable of selectively and controllably preparing polyphenylene sulfide resins with different melt viscosities and molecular weights, and the obtained polyphenylene sulfide resins have excellent heat resistance.
    Type: Application
    Filed: August 23, 2019
    Publication date: February 18, 2021
    Inventors: Zhirong CHEN, Woyuan LI, Hong YIN, Baishan HU, Guiyang ZHOU, Ming LIAN, Guangde QIN, Hangjun DENG, Xiongwei ZHANG, Guisheng QIU, Kejun WU
  • Publication number: 20210009514
    Abstract: The present disclosure discloses a preparation method for 4-phenylthio-benzenethiol. The preparation method comprises the following steps: subjecting phenyl sulfide as a raw material to a halogenation reaction to obtain 4-halophenyl sulfide; subjecting the 4-halophenyl sulfide to a sulfhydrylation reaction to obtain a 4-phenylthio-phenylthiolate; and subjecting the 4-phenylthio-phenylthiolate to acidification. The preparation method of the present disclosure avoids the use of materials such as thiophenol which pollutes the environment, and realizes efficient recycling of the reaction materials, solvents, water and the like. The preparation method of the present disclosure is a green process for the synthesis of 4-phenylthio-phenylthiol without organic waste, waste acid and waste water discharge.
    Type: Application
    Filed: July 12, 2018
    Publication date: January 14, 2021
    Applicants: Zhejiang NHU Company Ltd, Zhejiang University, Zhejiang NHU Special Materials Co., Ltd.
    Inventors: Zhirong CHEN, Woyuan LI, Hong YIN, Guíyang ZHOU, Haoran LI, Shuaifeng PAN, Ming LIAN, Guangde QIN, Qichuan LI
  • Patent number: 10844171
    Abstract: The present disclosure provides a production method of a semi-aromatic polyamide, and a semi-aromatic polyamide. Said production method of a semi-aromatic polyamide includes: step 1 of subjecting an initial charge of a diamine and a binary acid in an amine/acid molar ratio of less than 1.0 to form a slurry together with water and a catalyst, and subjecting the slurry to heating and dissolution to form a saline solution; step 2 of dehydrating said saline solution after detecting the composition thereof, detecting the content of diamine in a steam condensate from a dehydration unit, adjusting the amine/acid molar ratio to be larger than 1.0 by a molten diamine and a monoacid as a molecular weight regulator, and performing pre-polymerization; and step 3 of subjecting a pre-polymerization solution to post-polycondensation after vacuum flashing. The semi-aromatic polyamide of the present disclosure has a low gel content, excellent performance and extensive scope of application.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: November 24, 2020
    Assignees: Zhejiang Nhu Special Materials Co., Ltd., Zhejiang University, Zhejiang Nhu Company Ltd.
    Inventors: Zhirong Chen, Hong Yin, Qin Zhang, Xiaoxiao Wu, Wengang Hong, Hangjun Deng, Guiyang Zhou, Changze Wang
  • Publication number: 20200347186
    Abstract: The present application relates to a method for extracting coenzyme Q10 and a phospholipid from a coenzyme Q10 fermentation bacterium powder. The method is characterized in that the fermentation bacterium powder of a coenzyme Q10 production strain is subjected to extraction with a mixed solvent of which the three-dimensional Hansen solubility parameter is between 21 and 23 (J/cm3)1/2 and the hydrogen bonding solubility parameter thereof is between 10 and 12 (J/cm3)1/2. The present invention can efficiently extract two products, namely coenzyme Q10 and a phospholipid, from the coenzyme Q10 fermentation bacterium powder; the process thereof is highly operable, easy to be industrialized, and can provide a product with high purity and yield, having great economic benefit.
    Type: Application
    Filed: July 12, 2018
    Publication date: November 5, 2020
    Inventors: Woyuan LI, Hong YIN, Zhirong CHEN, Baishan HU, Guiyang ZHOU, Hangjun DENG, Ming LIAN, Xiongwei ZHANG, Qichuan LI, Jiang ZHAO
  • Patent number: 10737250
    Abstract: The present disclosure provides a PdIn alloy catalyst including a carrier and Pd metal particles supported by the carrier, the carrier is a nitrogen-doped porous carbon composite material having a plurality of passages, Pd metal particles are distributed in the plurality of passages, the nitrogen-doped porous carbon composite material includes a nitrogen-doped porous carbon material, a plurality of indium oxide particles, and In metal particles. The In metal particles are exposed through the plurality of passages, the plurality of indium oxide particles are uniformly distributed in the nitrogen-doped porous carbon material, and In atoms of the In metal particles migrated to surfaces of Pd particles selectively occupy edge and corner positions of metal lattice of Pd metal particles. The present disclosure further provides a method for manufacturing the PdIn alloy catalyst and application thereof.
    Type: Grant
    Filed: September 1, 2019
    Date of Patent: August 11, 2020
    Assignees: ZHEJIANG NHU COMPANY LTD., ZHEJIANG UNIVERSITY, SHANDONG NHU PHARMACEUTICAL CO., LTD., SHANDONG NHU VITAMIN CO., LTD.
    Inventors: Yong Wang, Lili Yu, Xiao Ma, Jianyong Mao, Zhe Wang, Shanjun Mao, Jianqing Li, Gang Chen, Haoran Li, Zhirong Chen
  • Patent number: 10668460
    Abstract: A composite catalyst includes a carrier and noble metal particles supported by the carrier, wherein the carrier is a nitrogen-doped porous carbon composite material having a plurality of passages. The nitrogen-doped porous carbon composite material can include a nitrogen-doped porous carbon material and a plurality of metal oxide particles. The plurality of metal oxide particles can be uniformly distributed in the nitrogen-doped porous carbon material. The plurality of metal oxide particles can be partially exposed through the plurality of passages. The noble metal particles can be tightly combined with the exposed metal oxide particles to achieve recombination. And the noble metal particles can be at least one of Pd metal particles, Pt metal particles, Ru metal particles, Rh metal particles, Ir metal particles, Au metal particles, or a combination thereof.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: June 2, 2020
    Assignees: ZHEJIANG NHD COMPANY LTD., ZHEJIANG UNIVERSITY, SHANDONG NHU PHARMACEUTICAL CO., LTD., SHANDONG NHU VITAMIN CO., LTD.
    Inventors: Yong Wang, Lili Yu, Xiao Ma, Jianyong Mao, Zhe Wang, Shanjun Mao, Jingsi Tang, Haoran Li, Zhirong Chen
  • Publication number: 20200070132
    Abstract: The present disclosure provides a PdIn alloy catalyst including a carrier and Pd metal particles supported by the carrier, the carrier is a nitrogen-doped porous carbon composite material having a plurality of passages, Pd metal particles are distributed in the plurality of passages, the nitrogen-doped porous carbon composite material includes a nitrogen-doped porous carbon material, a plurality of indium oxide particles, and In metal particles. The In metal particles are exposed through the plurality of passages, the plurality of indium oxide particles are uniformly distributed in the nitrogen-doped porous carbon material, and In atoms of the In metal particles migrated to surfaces of Pd particles selectively occupy edge and corner positions of metal lattice of Pd metal particles. The present disclosure further provides a method for manufacturing the PdIn alloy catalyst and application thereof.
    Type: Application
    Filed: September 1, 2019
    Publication date: March 5, 2020
    Inventors: Yong WANG, Lili YU, Xiao MA, Jianyong MAO, Zhe WANG, Shanjun MAO, Jianqing LI, Gang CHEN, Haoran LI, Zhirong CHEN
  • Publication number: 20200070138
    Abstract: A composite catalyst includes a carrier and noble metal particles supported by the carrier, wherein the carrier is a nitrogen-doped porous carbon composite material having a plurality of passages. The nitrogen-doped porous carbon composite material can include a nitrogen-doped porous carbon material and a plurality of metal oxide particles. The plurality of metal oxide particles can be uniformly distributed in the nitrogen-doped porous carbon material. The plurality of metal oxide particles can be partially exposed through the plurality of passages. The noble metal particles can be tightly combined with the exposed metal oxide particles to achieve recombination. And the noble metal particles can be at least one of Pd metal particles, Pt metal particles, Ru metal particles, Rh metal particles, Ir metal particles, Au metal particles, or a combination thereof.
    Type: Application
    Filed: October 31, 2019
    Publication date: March 5, 2020
    Inventors: Yong WANG, Lili YU, Xiao MA, Jianyong MAO, Zhe WANG, Shanjun MAO, Jingsi TANG, Haoran LI, Zhirong CHEN
  • Publication number: 20200055985
    Abstract: The present disclosure provides a production method of a semi-aromatic polyamide, and a semi-aromatic polyamide. Said production method of a semi-aromatic polyamide includes: step 1 of subjecting an initial charge of a diamine and a binary acid in an amine/acid molar ratio of less than 1.0 to form a slurry together with water and a catalyst, and subjecting the slurry to heating and dissolution to form a saline solution; step 2 of dehydrating said saline solution after detecting the composition thereof, detecting the content of diamine in a steam condensate from a dehydration unit, adjusting the amine/acid molar ratio to be larger than 1.0 by a molten diamine and a monoacid as a molecular weight regulator, and performing pre-polymerization; and step 3 of subjecting a pre-polymerization solution to post-polycondensation after vacuum flashing. The semi-aromatic polyamide of the present disclosure has a low gel content, excellent performance and extensive scope of application.
    Type: Application
    Filed: June 29, 2017
    Publication date: February 20, 2020
    Inventors: Zhirong Chen, Hong Yin, Qin Zhang, Xiaoxiao Wu, Wengang Hong, Hangjun Deng, Guiyang Zhou, Changze Wang
  • Publication number: 20200029596
    Abstract: The present invention discloses a fat-soluble nutrient microcapsule and a preparation method thereof. The fat-soluble nutrient microcapsule comprises the following components in percentage by weight: a fat-soluble nutrient (0.2-51.6%), an antioxidant (0.2-5.0%), a wall material (41.4-97.6%) and a moisture (2.0-5.0%) and the ratio of the fat-soluble nutrient that keeps active in the fat-soluble nutrient microcapsule to the fat-soluble nutrient that is initially added is 0.990-0.997:1. The preparation method of the fat-soluble nutrient microcapsule comprises an emulsification process and a granulation process, wherein the emulsification is performed in a cavitation emulsifier. By the preparation method, the nutrient active substance of the fat-soluble nutrient microcapsule has less lost and high stability.
    Type: Application
    Filed: April 26, 2018
    Publication date: January 30, 2020
    Inventors: JIANDONG LI, BAISHAN HU, ZHIRONG CHEN, LIFANG SHI, QICHUAN LI, XIAOYONG ZHU, GUISHENG QIU, QILEI ZHANG, YOUMIN YANG, LINPU CAI
  • Publication number: 20200007380
    Abstract: Generally discussed herein are devices, systems, and methods for virtual agent selection of an option not expressly selected by a user. A method can include receiving, from a virtual agent interface device of the virtual agent device, a response regarding a problem, wherein the response is responsive to a prompt, and wherein the prompt is associated with one or more expected responses, determining whether the response is a match to one of the expected answers by performing one or more of (a) an ordinal match, (b) an inclusive match, (c) an entity match, and (d) a model match, and providing, responsive to a determination that the response is a match, a next prompt, or provide a solution to the problem, the next prompt associated with expected responses to the next prompt.
    Type: Application
    Filed: June 28, 2018
    Publication date: January 2, 2020
    Inventors: Junyan Chen, Zhirong Chen, Changhong Yuan, Eslam Kamal AbdelReheem, Bing Xu, Huicheng Song, Xin Wan
  • Publication number: 20200005118
    Abstract: Generally discussed herein are devices, systems, and methods for detecting a conversation with a virtual agent is offtrack and responding appropriately. A method can include receiving a prompt, expected responses to the prompt, and a response of an interaction session with the virtual agent, the interaction session to solve a problem of a user, determining whether the response indicates the interaction session is in an offtrack state based on the prompt, expected responses, and response, in response to a determination that the interaction session is in the offtrack state, determining a taxonomy of the offtrack state, and providing, based on the determined taxonomy, a next prompt to the interaction session.
    Type: Application
    Filed: June 28, 2018
    Publication date: January 2, 2020
    Inventors: Zhirong Chen, Junyan Chen, Xin Wan, Volodymyr Trubachov, Huicheng Song, Yanfen Song, Jiayuan Huang, Jiantao Sun, Shichao Hu, Zheng Chen
  • Patent number: 10293273
    Abstract: The present disclosure relates to a method for continuous preparation of high bulk density methionine crystals.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: May 21, 2019
    Assignees: Shandong Nhu Amino Acid Co. Ltd., Zhejiang University, Zhejiang Nhu Co., Ltd.
    Inventors: Zhirong Chen, Zhixuan Wang, Cong Chen, Zhengjiang Wang, Cunchao Wang, Yin Li, Zhixiang Zhang
  • Patent number: 10212957
    Abstract: Disclosed in the present invention is a method for preparing an oil-dispersible carotenoid preparation, comprising (by weight parts): mixing 100 parts of carotenoid microcapsule, 100-400 parts of vegetable oil and 0.1-1 part of oil-soluble antioxidant; and grinding the mixture in a colloid mill in a nitro—gen atmosphere and at 10-30° C. to obtain a uniform oil-dispersible carotenoid preparation, wherein the preparation contains 2%-14% carotenoid with an average particle size of up to 0.1-1 ?m, and 100 parts of carotenoid microcapsule contains 10.5-35.8 parts carotenoid, 0.1-1 part of water-soluble antioxidant, and the remainder is a water-soluble colloid. The advantages of the present invention lie in that the oil-dispersible form has a high stability as the surface of the carotenoid particles is still protected with a dense water-soluble colloid, and that an oil-dispersible carotenoid preparation containing carotenoid with a content of up to 2%-14% and an average particle size of only 0.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: February 26, 2019
    Assignees: ZHEJIANG UNIVERSITY, ZHEJIANG NHU COMPANY LTD.
    Inventors: Dan Qiu, Lifang Shi, Jiandong Li, Zhirong Chen, Jiachao Zhou
  • Patent number: 10065901
    Abstract: The present invention discloses a method for preparing optically active carbonyl compound, comprising the following steps: under the catalysis of chiral amine salt and transition metal catalysts, with hydrogen and catalytic amount of dihydropyridine compound as hydrogen source, use ?, ?-unsaturated aldehydes or ?, ?-unsaturated troponoid compounds to conduct asymmetric catalytic reaction to obtain the optically active carbonyl compound. This method comes in moderate reaction condition, simple operation, and catalytic amount of dihydropyridine compounds usage, the target product is easy to be separated and purified from the reaction system, and the metal catalyst can be recycled, it is economical.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 4, 2018
    Assignees: ZHEJIANG NHU COMPANY LTD., SHANDONG NHU PHARMACEUTICAL CO., LTD., ZHEJIANG UNIVERSITY
    Inventors: Yougui Zhou, Ming Yu, Jintao Yuan, Lei Zhao, Xiandong Zhu, Guangxiong Yu, Weiwei Su, Weikang Shao, Xingxing Shi, Yin Zhang, Ming Feng, Zhirong Chen, Haoran Li, Yuhong Zhang
  • Publication number: 20180184689
    Abstract: The present invention discloses a method for preparing controlled release type lutein feed additive. Steps: lutein extract, glycerol and fat are mixed and dissolved, then alkali liquor is dropped under condition of mechanical stirring and sheering emulsification to allow the lutein to be fully saponified. Then fat is added and alkaline saponification is conducted, adjusting the viscosity and neutralizing and conducting spray granulation to the mixed liquor to obtain controlled release lutein feed additive. By utilizing the combined effects of glycerol and fat, the present invention realizes saponification and microcapsule formation using simple method.
    Type: Application
    Filed: June 21, 2016
    Publication date: July 5, 2018
    Inventors: DAN QIU, ZHIRONG CHEN, LIFANG SHI, JIANDONG LI, LINPU CAI, YUFENG LIANG, MINCONG CAI, LIFENG ZHAO
  • Publication number: 20180105477
    Abstract: The present invention discloses a method for preparing optically active carbonyl compound, comprising the following steps: under the catalysis of chiral amine salt and transition metal catalysts, with hydrogen and catalytic amount of dihydropyridine compound as hydrogen source, use ?, ?-unsaturated aldehydes or ?, ?-unsaturated troponoid compounds to conduct asymmetric catalytic reaction to obtain the optically active carbonyl compound. This method comes in moderate reaction condition, simple operation, and catalytic amount of dihydropyridine compounds usage, the target product is easy to be separated and purified from the reaction system, and the metal catalyst can be recycled, it is economical.
    Type: Application
    Filed: November 29, 2016
    Publication date: April 19, 2018
    Inventors: YOUGUI ZHOU, MING YU, JINTAO YUAN, LEI ZHAO, XIANDONG ZHU, GUANGXIONG YU, WEIWEI SU, WEIKANG SHAO, XINGXING SHI, YIN ZHANG, MING FENG, ZHIRONG CHEN, HAORAN LI, YUHONG ZHANG
  • Publication number: 20180043281
    Abstract: The present disclosure relates to a method for continuous preparation of high bulk density methionine crystals.
    Type: Application
    Filed: December 23, 2015
    Publication date: February 15, 2018
    Inventors: Zhirong Chen, Zhixuan Wang, Cong Chen, Zhengjiang Wang, Cunchao Wang, Yin Li, Zhixiang Zhang
  • Patent number: 9881580
    Abstract: A circuit for common electrode voltage generation includes: a VCOM driver configured to output alternating voltage levels at an output thereof, the output being connected to a display panel; a switching circuit with a plurality of inputs and an output, being configured to select one of voltage levels at the inputs at a time and thereby to output alternating voltages levels at the output of the switching circuit; and a stabilizing capacitor with one end connected to the output of the VCOM driver, and the other end connected to the output of the switching circuit.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: January 30, 2018
    Assignee: Solomon Systech Limited
    Inventors: Zhirong Chen, Wing Chun Chan, Wai Kwong Lee, Choi Wing Siu