Patents by Inventor Xuehui LI
Xuehui LI 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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Patent number: 11913479Abstract: An impact-resistant balanced hydro-cylinder with pressure relief and buffering protection comprises a cylinder body (11), a piston (13), a piston rod (14), and a first valve core (21) and a second valve core (51) slidable relative to the cylinder body (11). A closed first gas cavity (22) and a closed second gas cavity (52) are respectively formed between the two valve cores and inner walls of two opposite ends of the cylinder body (11). A closed first oil cavity (32) and a closed second oil cavity (42) are respectively formed between the two valve cores and two end faces of the piston (13). A through hole (33) for the first oil cavity and a through hole (43) for the second oil cavity are respectively provided in the positions on the cylinder body (11) corresponding to the first oil cavity (32) and the second oil cavity (42).Type: GrantFiled: April 30, 2021Date of Patent: February 27, 2024Assignee: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Lirong Wan, Xuehui Yu, Dejian Ma, Jiantao Wang, Fengwen Xin, Zhaoji Li, Guoqing Qi, Baolong Chen
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Publication number: 20220400685Abstract: The present disclosure belongs to the technical field of plant pest control, and particularly relates to a Camellia sinensis endophyte Penicillium ehrlichii and an application thereof. The present disclosure relates to a novel endophyte separated from a Camellia sinensis body and identified as Penicillium ehrlichii by means of morphology and molecular biology. Biological activity evaluation indicates that Penicillium ehrlichii shows good antagonistic antifungal activity to common pathogenic fungi on several plants. It means that the strain used as a biocontrol fungus for phytopathogens can be applied to environmental-friendly and safe prevention and control of plant diseases.Type: ApplicationFiled: May 31, 2022Publication date: December 22, 2022Applicant: Anhui Agricultural UniversityInventors: Hao JIANG, Li QIN, Hui WU, Xuehui LI, Mengting ZHANG
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Patent number: 10870869Abstract: An enzymatic method for preparing glyceryl butyrate, comprising: (1) carrying out an esterification reaction between n-butyric acid and glycerol using lipase as a catalyst, ethyl acetate and/or ethyl formate as an additive; (2) separating the reaction product, recovering the additive by distillation under reduced pressure to obtain glyceryl butyrate. The invention uses lipase as a catalyst to catalyze the esterification reaction of n-butyric acid and glycerin at normal temperature and normal pressure, reduces the energy consumption of the reaction. Also, the reaction condition is mild, no side reaction happens, and no water-carrying agent is used. In addition, the additive increases the catalytic efficiency of the lipase and the conversion rate of butyric acid.Type: GrantFiled: November 8, 2017Date of Patent: December 22, 2020Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Yonghua Wang, Weifei Wang, Bo Yang, Dongming Lan, Fanghua Wang, Xuehui Li, Dongqi Zhu, Daoming Li, Zhigang Li, Huayong Chen
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Patent number: 10807940Abstract: The present invention discloses a method for preparing p-hydroxycinnamate by using an ionic liquid for catalytic lignin depolymerization comprising: 1) preparation of a halogen metal-based ionic liquid: preparing the halogen metal-based ionic liquid by reacting an alkylimidazole chloride with a metal chloride by heating the same to 30° C. to 80° C. with stirring; and 2) catalytic depolymerization of lignin: mixing the halogen metal-based ionic liquid and lignin with an alcohol, and after N2 replacement, heating the solution to 140° C. to 200° C. and reacting the solution for 4-8 h while stirring to prepare high value-added chemicals with p-hydroxycinnamate as a main product. The present invention has advantages of a simple process, mild conditions, environmental kindness, and high selectivity for a main product. The ionic liquid is simple in preparation, has a good atom economy, and is recyclable. Under optimal conditions, the yield of p-hydroxycinnamate can reach 40-80 mg/g.Type: GrantFiled: November 21, 2017Date of Patent: October 20, 2020Assignee: South China University of TechnologyInventors: Xuehui Li, Zhangmin Li, Zhenping Cai, Jinxing Long, Weijie Zhao, Hongwei Ma
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Patent number: 10807938Abstract: The invention discloses a method for preparing maleate by selective catalytic oxidation of lignin. The method uses a heteropolyacid functionalized ionic liquid as a catalyst, and an aqueous alcohol solution as a reaction medium to achieve high-efficiency selective catalytic conversion and ring opening oxidation of biomass lignin at a reaction temperature of 110-160° C. and an oxygen pressure of 0.5-1.0 MPa for 1-6 h. The selectivity of maleate is higher than 47.83%. The yield and selectivity of a single chemical derived from the depolymerization of lignin in the present invention are much higher than the prior art, and the ionic liquid catalyst exhibits outstanding advantages such as availability of recovery and recycling through simple temperature adjustment; the reaction conditions of the present invention are mild, and the process is green and safe, easy to operate, and available for batch and continuous production.Type: GrantFiled: December 14, 2016Date of Patent: October 20, 2020Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Xuehui Li, Zhenping Cai, Yingwen Li, Jinxing Long, Lefu Wang
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Publication number: 20200181058Abstract: The present invention discloses a method for preparing p-hydroxycinnamate by using an ionic liquid for catalytic lignin depolymerization comprising: 1) preparation of a halogen metal-based ionic liquid: preparing the halogen metal-based ionic liquid by reacting an alkylimidazole chloride with a metal chloride by heating the same to 30° C. to 80° C. with stirring; and 2) catalytic depolymerization of lignin: mixing the halogen metal-based ionic liquid and lignin with an alcohol, and after N2 replacement, heating the solution to 140° C. to 200° C. and reacting the solution for 4-8 h while stirring to prepare high value-added chemicals with p-hydroxycinnamate as a main product. The present invention has advantages of a simple process, mild conditions, environmental kindness, and high selectivity for a main product. The ionic liquid is simple in preparation, has a good atom economy, and is recyclable. Under optimal conditions, the yield of p-hydroxycinnamate can reach 40-80 mg/g.Type: ApplicationFiled: November 21, 2017Publication date: June 11, 2020Inventors: Xuehui Li, Zhangmin Li, Zhenping Cai, Jinxing Long, Weijie Zhao, Hongwei Ma
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Publication number: 20190322611Abstract: The invention discloses a method for preparing maleate by selective catalytic oxidation of lignin. The method uses a heteropolyacid functionalized ionic liquid as a catalyst, and an aqueous alcohol solution as a reaction medium to achieve high-efficiency selective catalytic conversion and ring opening oxidation of biomass lignin at a reaction temperature of 110-160° C. and an oxygen pressure of 0.5-1.0 MPa for 1-6 h. The selectivity of maleate is higher than 47.83%. The yield and selectivity of a single chemical derived from the depolymerization of lignin in the present invention are much higher than the prior art, and the ionic liquid catalyst exhibits outstanding advantages such as availability of recovery and recycling through simple temperature adjustment; the reaction conditions of the present invention are mild, and the process is green and safe, easy to operate, and available forbatch and continuous production.Type: ApplicationFiled: December 14, 2016Publication date: October 24, 2019Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Xuehui LI, Zhenping CAI, Yingwen LI, Jinxing LONG, Lefu WANG
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Patent number: 10450801Abstract: The present disclosure provides a casing windowing method and tool using coiled tubing; the windowing method comprises the steps of: a) preparing a borehole, including drifting a casing, and scraping an inner wall of the casing; b) hanging a positioning assembly in the casing, including seating the positioning assembly at a wellhead of the borehole, and after the positioning assembly is put down to a predetermined position in the casing, hanging a hanger of the positioning assembly at the inner wall of the casing; c) fixing a whipstock at a down-hole of the borehole, including seating the whipstock at the wellhead, and inserting a guiding assembly of the whipstock into the hanger so that an orientation of a window inclined plane of the guiding assembly meets a requirement of window orientation; and d) windowing the casing, including seating a tapered windowing mill at the wellhead, and after the tapered windowing mill is put down to the window inclined plane of the guiding assembly, starting the tapered windoType: GrantFiled: November 29, 2016Date of Patent: October 22, 2019Assignees: CHINA NATIONAL PETROLEUM CORPORATION, CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITEDInventors: Yanping Zhang, Xuehui Li, Qianli Wu, Yongliang Yu, Chuan Cao, Mingjie Lv, Tao Jia, Yi Yang
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Publication number: 20190276861Abstract: An enzymatic method for preparing glyceryl butyrate, comprising: (1) carrying out an esterification reaction between n-butyric acid and glycerol using lipase as a catalyst, ethyl acetate and/or ethyl formate as an additive; (2) separating the reaction product, recovering the additive by distillation under reduced pressure to obtain glyceryl butyrate. The invention uses lipase as a catalyst to catalyze the esterification reaction of n-butyric acid and glycerin at normal temperature and normal pressure, reduces the energy consumption of the reaction. Also, the reaction condition is mild, no side reaction happens, and no water-carrying agent is used. In addition, the additive increases the catalytic efficiency of the lipase and the conversion rate of butyric acid.Type: ApplicationFiled: November 8, 2017Publication date: September 12, 2019Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Yonghua WANG, Weifei WANG, Bo YANG, Dongming LAN, Fanghua WANG, Xuehui LI, Dongqi ZHU, Daoming LI, Zhigang LI, Huayong CHEN
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Patent number: 10329858Abstract: The present invention relates to the field of petroleum extraction equipment, and discloses a coiled tubing unit, which comprises a vehicle body (T), a control cab (30), a coiled tubing reel (10) configured to wind coiled tubing, and a power skid (20) configured to supply power to the coiled tubing reel (10) and transported separately, wherein, the coiled tubing reel (10) and the control cab (30) are mounted on the vehicle body (T). With the coiled tubing unit provided in the present invention, the total length and total weight of the vehicle body on which the coiled tubing reel is mounted are smaller and can meet the requirements for transportation in regions where smaller vehicle dimensions and weight are specified for transportation when coiled tubing in large diameter and/or great length is transported, and the coiled tubing unit is adaptive to the operating habits, and can be deployed flexibly so that it can be used in a well field where the space is limited.Type: GrantFiled: September 24, 2018Date of Patent: June 25, 2019Assignee: JIANGHAN MACHINERY RESEARCH INSTITUTE LIMITED COMPInventors: Huiqun He, Gao Yang, Shoujun Liu, Xuehui Li, Ge Xiong, Shibin Zhang, Jun Hao, Heping Cao, Wenyi Duan, Zhiqiang Hu, Jiafu Yan, Zhimin Yang, Fei Liu, Zhongcheng Zhou
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Publication number: 20170152718Abstract: The present disclosure provides a casing windowing method and tool using coiled tubing; the windowing method comprises the steps of: a) preparing a borehole, including drifting a casing, and scraping an inner wall of the casing; b) hanging a positioning assembly in the casing, including seating the positioning assembly at a wellhead of the borehole, and after the positioning assembly is put down to a predetermined position in the casing, hanging a hanger of the positioning assembly at the inner wall of the casing; c) fixing a whipstock at a down-hole of the borehole, including seating the whipstock at the wellhead, and inserting a guiding assembly of the whipstock into the hanger so that an orientation of a window inclined plane of the guiding assembly meets a requirement of window orientation; and d) windowing the casing, including seating a tapered windowing mill at the wellhead, and after the tapered windowing mill is put down to the window inclined plane of the guiding assembly, starting the tapered windoType: ApplicationFiled: November 29, 2016Publication date: June 1, 2017Inventors: Yanping ZHANG, Xuehui LI, Qianli WU, Yongliang YU, Chuan CAO, Mingjie LV, Tao JIA, Yi YANG