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1.发明授权公开(公告)号：US11440996B2
公开(公告)日：2022-09-13
申请号：US16957934
申请日：2018-07-12
发明人： Woyuan Li , Hong Yin , Zhirong Chen , Baishan Hu , Guiyang Zhou , Hangjun Deng , Ming Lian , Xiongwei Zhang , Qichuan Li , Jiang Zhao
IPC分类号： C08G75/0254 , C08G75/0213 , C08G75/029
摘要： 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.
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公开(公告)号：US11220478B2
公开(公告)日：2022-01-11
申请号：US16955511
申请日：2018-07-12
发明人： Zhirong Chen , Woyuan Li , Hong Yin , Guíyang Zhou , Haoran Li , Shuaifeng Pan , Ming Lian , Guangde Qin , Qichuan Li
IPC分类号： C07C319/20 , C01D5/02
摘要： 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.
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公开(公告)号：US20220025120A1
公开(公告)日：2022-01-27
申请号：US17416587
申请日：2019-11-20
发明人： Zhirong Chen , Hong Yin , Hangjun Deng , Guiyang Zhou , Danqi Zhu , Xiaoxiao Wu , Wengang Hong , Guisheng Qiu , Qichuan Li
摘要： 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.
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公开(公告)号：US11130115B2
公开(公告)日：2021-09-28
申请号：US16919097
申请日：2020-07-01
发明人： Haoran Li , Yong Wang , Baishan Hu , Xiao Ma , Dan Qiu , Qian Luo , Zhe Wang , Shanjun Mao , Lili Yu , Qichuan Li
摘要： The present invention discloses a selective hydrogenation catalyst and a preparation method and an application thereof, belonging to the technical field of catalysts. The selective hydrogenation catalyst comprises an active component and a carrier for supporting the active component, wherein the active component is a transition metal particle, the carrier is modified by a flexible chain ligand in advance, one end of the flexible chain ligand is uniformly distributed on the surface of the carrier, and the other end of the flexible chain ligand is coordinated on a transition metal. When the catalyst is used for catalytic hydrogenation reaction of dehydrolinalool or 2-methyl-3-butyn-2-ol, the stability is good, the catalyst still has high selectivity after being used for a long time, and the quality of a hydrogenation product can be guaranteed.
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5.发明申请公开(公告)号：US20210147350A1
公开(公告)日：2021-05-20
申请号：US17263362
申请日：2019-08-27
发明人： Zhirong Chen , Hong Yin , Baishan Hu , Zhengjiang Wang , Zhixuan Wang , Cong Chen , Guisheng Qiu , Qichuan Li , Qingai Shi
IPC分类号： C07C319/20 , C07C319/28 , C07C323/52 , B01J19/24
摘要： Provided by the present disclosure are a method and a device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof; the intermediates for preparing 2-hydroxy-4-methylthiobutyric acid comprise 3-methylthiopropionaldehyde and 2-hydroxy-4-methylthiobutyronitrile. The method for preparing 2-hydroxy-4-methylthiobutyric acid provided by the present disclosure comprises: step (1), a step of reacting acrolein with methyl mercaptan to prepare 3-methylthiopropionaldehyde; step (2), a step of reacting 3-methylthiopropionaldehyde with hydrocyanic acid to prepare 2-hydroxy-4-methylthiobutyronitrile; and step (3), a step of hydrating 2-hydroxy-4-methylthiobutyronitrile by using sulfuric acid and then hydrolyzing to prepare 2-hydroxy-4-methylthiobutyric acid; wherein in steps (1), (2) and (3), the reaction status of the materials is detected online, and the proportions of the materials are controlled according to the detection results such that reactions are performed completely
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公开(公告)号：US10974225B1
公开(公告)日：2021-04-13
申请号：US16919092
申请日：2020-07-01
发明人： Haoran Li , Xiao Ma , Yong Wang , Baishan Hu , Dan Qiu , Jianyong Mao , Bing Lu , Shanjun Mao , Lili Yu , Qichuan Li
IPC分类号： B01J23/00 , B01J23/889 , C07C29/56 , B01J23/881 , B01J37/02 , B01J37/08 , B01J35/04 , B01J21/06
摘要： The present disclosure belongs to the technical field of catalysis, and particularly relates to a metal oxide coated ceramic corrugated plate catalyst, its preparation method and application thereof in preparation of key intermediates of citral. The catalyst consists of a ceramic corrugated plate carrier and a metal oxide active layer coated on a surface of the carrier, wherein the metal oxide active layer is a metal oxide formed by active ingredient titanium and at least four other metal elements selected from vanadium, chromium, manganese, iron, zirconium, niobium and molybdenum.
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7.发明授权公开(公告)号：US11130732B2
公开(公告)日：2021-09-28
申请号：US17263362
申请日：2019-08-27
发明人： Zhirong Chen , Hong Yin , Baishan Hu , Zhengjiang Wang , Zhixuan Wang , Cong Chen , Guisheng Qiu , Qichuan Li , Qingai Shi
IPC分类号： C07C319/20 , C07C319/18 , B01J19/24 , C07C319/28 , C07C323/52
摘要： Provided by the present disclosure are a method and a device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof; the intermediates for preparing 2-hydroxy-4-methylthiobutyric acid comprise 3-methylthiopropionaldehyde and 2-hydroxy-4-methylthiobutyronitrile. The method for preparing 2-hydroxy-4-methylthiobutyric acid provided by the present disclosure comprises: step (1), a step of reacting acrolein with methyl mercaptan to prepare 3-methylthiopropionaldehyde; step (2), a step of reacting 3-methylthiopropionaldehyde with hydrocyanic acid to prepare 2-hydroxy-4-methylthiobutyronitrile; and step (3), a step of hydrating 2-hydroxy-4-methylthiobutyronitrile by using sulfuric acid and then hydrolyzing to prepare 2-hydroxy-4-methylthiobutyric acid; wherein in steps (1), (2) and (3), the reaction status of the materials is detected online, and the proportions of the materials are controlled according to the detection results such that reactions are performed completely.
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