Patents by Inventor GUIYANG ZHOU
GUIYANG ZHOU 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: 20230406807Abstract: A method and apparatus for preparing methyl methacrylate (MMA) are provided. The method includes an aldol condensation reaction, a first distillation, a second distillation, a third distillation, a phase splitting, and a fourth distillation. Through the control of the process, the aldol condensation reaction can be performed when methyl propionate is used as the ninth material stream and formalin solution is used as the fifteenth stream material, MMA is obtained as the final product from the third material stream, and the waste with low content of residual formaldehyde is recovered from the eighth material stream.Type: ApplicationFiled: August 31, 2023Publication date: December 21, 2023Inventors: Lei WU, Kunpeng CHENG, Xueming LI, Runrun HONG, Qing'ai SHI, Chuang WANG, Guodong HUANG, Guiyang ZHOU
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Publication number: 20230035875Abstract: Provided are a method and device for preparing adiponitrile. The method of the present disclosure comprises the steps of a first hydrocyanation reaction, an isomerization reaction and a second hydrocyanation reaction, wherein online Raman spectroscopy is used for detecting the content of a specific component in the system; and the reaction conditions are regulated based on the detection results, so as to achieve precise control of the materials in each step of the reaction system. The method of the present disclosure can reduce an amount of butadiene, thereby reducing the subsequent energy consumption needed for recycling butadiene and equipment investment after reaction; by monitoring the content of hydrocyanic acid in real time, the residue of hydrocyanic acid is reduced to a lower level, and the operation safety and the stability of a catalyst during reaction are improved; and the loss of the catalyst is reduced.Type: ApplicationFiled: December 11, 2020Publication date: February 2, 2023Inventors: Zhirong CHEN, Wenbin WU, Guiyang ZHOU, Ming FENG, Xingxing SHI, Tao MA, Zhichao FENG, Xiongwei ZHANG, Qing SUN, Yong XU
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Publication number: 20230019023Abstract: A sulfur-containing compound and a halogenated aromatic compound are used as raw materials, with 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 which then reacts with a chain extender at high temperature to form a high molecular weight polyphenylene sulfide resin. A preparation method has the advantages of being high yield, low cost, and 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: ApplicationFiled: September 26, 2022Publication date: January 19, 2023Inventors: Zhirong CHEN, Woyuan LI, Hong YIN, Baishan HU, Guiyang ZHOU, Ming LIAN, Guangde QIN, Hangjun DENG, Xiongwei ZHANG, Guisheng QIU, Kejun WU
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Patent number: 11440996Abstract: A preparation method of a polyphenylene sulfide resin, and a polyphenylene sulfide resin prepared by the method using a sulfur-containing compound, an alkaline substance and p-dichlorobenzene as raw materials, a fatty acid as a polycondensation aid to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained, which then reacts with a terminal-group adjusting agent at a high temperature to generate the polyphenylene sulfide resin resulting in high yield and low cost. The prepared polyphenylene sulfide resin has high reactivity, high melting crystallization temperature and excellent thermal stability. The resulting polyphenylene sulfide resin can be directly used for extrusion and injection molding.Type: GrantFiled: July 12, 2018Date of Patent: September 13, 2022Assignees: ZHEJIANG NHU CO., LTD., ZHEJIANG UNIVERSITY, ZHEJIANG NHU SPECIAL MATERIALS CO., LTD.Inventors: Woyuan Li, Hong Yin, Zhirong Chen, Baishan Hu, Guiyang Zhou, Hangjun Deng, Ming Lian, Xiongwei Zhang, Qichuan Li, Jiang Zhao
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Publication number: 20220025120Abstract: The present disclosure discloses a semi-aromatic polyamide and a preparation method therefor. The semi-aromatic polyamide is obtained by polymerization reaction using a diamine, a dibasic acid and a monoacid as main raw materials while adding a special end-capping agent. The semi-aromatic polyamide prepared according to the present disclosure has good thermal stability, a yellowness index of less than 20, a glass transition temperature of 90° C. or above, and a melting point of 300° C. or above, and can be applied to spare parts for fuel pipelines in automobiles, and electronic and electrical industries such as LED panels.Type: ApplicationFiled: November 20, 2019Publication date: January 27, 2022Inventors: Zhirong Chen, Hong Yin, Hangjun Deng, Guiyang Zhou, Danqi Zhu, Xiaoxiao Wu, Wengang Hong, Guisheng Qiu, Qichuan Li
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Patent number: 11220478Abstract: 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: GrantFiled: July 12, 2018Date of Patent: January 11, 2022Assignees: 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
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Publication number: 20210047471Abstract: 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: ApplicationFiled: August 23, 2019Publication date: February 18, 2021Inventors: Zhirong CHEN, Woyuan LI, Hong YIN, Baishan HU, Guiyang ZHOU, Ming LIAN, Guangde QIN, Hangjun DENG, Xiongwei ZHANG, Guisheng QIU, Kejun WU
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Publication number: 20210009514Abstract: 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: ApplicationFiled: July 12, 2018Publication date: January 14, 2021Applicants: 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
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Patent number: 10844171Abstract: 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: GrantFiled: June 29, 2017Date of Patent: November 24, 2020Assignees: 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
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Publication number: 20200347186Abstract: 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: ApplicationFiled: July 12, 2018Publication date: November 5, 2020Inventors: Woyuan LI, Hong YIN, Zhirong CHEN, Baishan HU, Guiyang ZHOU, Hangjun DENG, Ming LIAN, Xiongwei ZHANG, Qichuan LI, Jiang ZHAO
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Publication number: 20200055985Abstract: 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: ApplicationFiled: June 29, 2017Publication date: February 20, 2020Inventors: Zhirong Chen, Hong Yin, Qin Zhang, Xiaoxiao Wu, Wengang Hong, Hangjun Deng, Guiyang Zhou, Changze Wang
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Patent number: 9567440Abstract: The present invention discloses a fiber-grade polyphenylene sulfide resin synthesis method, taking sodium bisulfide and p-dichlorobenzene as raw materials, N-methyl pyrrolidone as the solvent and C5-C6 fatty acid salt formed through dehydration to C5-C6 fatty acid and sodium hydroxide as the polymerization additive for synthesis through polymerization. White polyphenylene sulfide resin is obtained through acidification and washing of reaction slurry. In view of the fact that MFR is below 125 g/10 min, weight-average molecular weight as measured by GPC is over 4.2×104, and whiteness is over 90, it can satisfy requirements for fiber polyphenylene sulfide resin. C5-C6 fatty acid salt according to the method of the present invention has a higher solubility in NMP, which can better promote polymerization. It is to be fully diverted into the filtrate after filter prior to conversion into free fatty acid again through acidification with hydrochloric acid.Type: GrantFiled: October 29, 2013Date of Patent: February 14, 2017Assignees: ZHEJIANG NHU SPECIAL MATERIALS CO., LTD., ZHEJIANG UNIVERSITY, SHANGYU NHU BIOLOGICAL CHEMICAL CO., LTD., ZHEJIANG NHU COMPANY LTD.Inventors: Zhirong Chen, Woyuan Li, Haoran Li, Ming Lian, Hong Yin, Guiyang Zhou, Xinfeng Zheng
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Publication number: 20150344632Abstract: The present invention discloses a fiber-grade polyphenylene sulfide resin synthesis method, taking sodium bisulfide and p-dichlorobenzene as raw materials, N-methyl pyrrolidone as the solvent and C5-C6 fatty acid salt formed through dehydration to C5-C6 fatty acid and sodium hydroxide as the polymerization additive for synthesis through polymerization. White polyphenylene sulfide resin is obtained through acidification and washing of reaction slurry. In view of the fact that MFR is below 125 g/10 min, weight-average molecular weight as measured by GPC is over 4.2×104, and whiteness is over 90, it can satisfy requirements for fiber polyphenylene sulfide resin. C5-C6 fatty acid salt according to the method of the present invention has a higher solubility in NMP, which can better promote polymerization. It is to be fully diverted into the filtrate after filter prior to conversion into free fatty acid again through acidification with hydrochloric acid.Type: ApplicationFiled: October 29, 2013Publication date: December 3, 2015Applicant: ZHEJIANG NGU SPECIAL MATERIALS CO., LTD.Inventors: ZHIRONG CHEN, WOYUAN LI, HAORAN LI, MING LIAN, HONG YIN, GUIYANG ZHOU, XINFENG ZHENG