Patents by Inventor Dadong Li

Dadong 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).

  • Publication number: 20200040266
    Abstract: The present application relates to a process for treating gasoline, comprising the steps of: splitting a gasoline feedstock into a light gasoline fraction and a heavy gasoline fraction; optionally, subjecting the resulting light gasoline fraction to etherification to obtain an etherified oil; contacting the heavy gasoline fraction with a mixed catalyst and subjecting it to desulfurization and aromatization in the presence of hydrogen to obtain a heavy gasoline product; wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an aromatization catalyst. The process of the present application is capable of reducing the sulfur and olefin content of gasoline and at the same time increasing the octane number of the gasoline while maintaining a high yield of gasoline.
    Type: Application
    Filed: October 20, 2017
    Publication date: February 6, 2020
    Inventors: Youhao XU, Junyi MAO, Xin WANG, Qing YUAN, Jingchuan YU, Hong NIE, Dadong LI
  • Publication number: 20190225897
    Abstract: A process for converting inferior feedstock oil includes several steps. In step a) the inferior feedstock oil is subjected to a low severity hydrogenation reaction. The reaction product is separated to produce a gas, a hydrogenated naphtha, a hydrogenated diesel and a hydrogenated residual oil. In step b) the hydrogenated residual oil obtained in step a) is subjected to a first catalytic cracking reaction, the reaction product is separated to produce a first dry gas, a first LPG, a first gasoline, a first diesel and a first FCC-gas oil. In step c) the first FCC-gas oil obtained in step b) is subjected to a hydrogenation reaction of gas oil, the reaction product is separated to produce a hydrogenated gas oil, and in step d) the hydrogenated gas oil obtained in step c) is subjected to the first catalytic cracking reaction of step b) or a second catalytic cracking reaction.
    Type: Application
    Filed: October 17, 2016
    Publication date: July 25, 2019
    Inventors: Youhao XU, Tao LIU, Xin WANG, Lishun DAI, Tian LAN, Hong NIE, Dadong LI
  • Publication number: 20190061041
    Abstract: The invention discloses a mobile flash butt welding method for 136RE+SS heat-treated rail, and particularly a mobile flash butt welding method for 136RE+SS heat-treated rail in the technical field of rail welding. The mobile flash butt welding method for 136RE+SS heat-treated rail in the invention includes a pre-flash stage, a flash stage, a boost stage, an upset stage and a forge stage, with a total heat input of 7.1 MJ-10.0 MJ, a total duration of 110 s-135 s and an upsetting distance of 12.8 mm-16.7 mm during the welding process. By adopting the method of the invention, mobile flash butt welding can be conducted for 136RE+SS heat-treated rail successfully, and the rail joint has less internal defects but stable welding quality, and can pass fatigue test, tensile test and slow bend test to meet the requirements. Besides, the rail joint can pass the drop weight test for 15 welds continuously, demonstrating better stability.
    Type: Application
    Filed: August 24, 2018
    Publication date: February 28, 2019
    Inventors: Xin LU, Dadong LI, Ruoyu WANG, Wei BAI, Jian DENG, Feixiang XU
  • Patent number: 10214799
    Abstract: The present invention relates to a heat treatment method for increasing the depth of hardening layer in a steel rail, and belongs to the field of steel rail production process. The technical problem to be solved in the present invention is to provide a heat treatment method for increasing the depth of hardening layer in a steel rail and a steel rail obtained with the method. The method comprises the following steps: cooling a finished rolling steel rail by natural cooling, till the temperature at the center of rail head surface is 660˜730° C.; cooling the steel rail by accelerated cooling at 1.5˜3.5° C./s cooling rate, till the temperature at the center of rail head surface is 500˜550° C.; increasing the cooling rate by 1.0˜2.0° C./s and further cooling down the steel rail, till the temperature at the center of rail head surface is 450° C. or lower; then, stopping the accelerated cooling, and cooling down the steel rail by air cooling to room temperature.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: February 26, 2019
    Assignees: PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd., Pangang Group Panzhihua Steel & Vanadium Co., Ltd.
    Inventors: Zhenyu Han, Ming Zou, Jihai Jia, Hua Guo, Dadong Li, Yong Deng, Chunjian Wang, Jun Yuan, Chongmu Chen
  • Patent number: 10196781
    Abstract: The present invention discloses a method for preparing hypereutectoid steel rail in which the composition of the billets adopted is: C: 0.86-1.05 wt. %; Si: 0.3-1 wt. %; Mn: 0.5-1.3 wt. %; Cr: 0.15-0.35 wt. %; Cu: 0.3-0.5 wt. %; P: 0.02-0.04 wt. %; S: ?0.02 wt. %; Ni: ½-? of the content of Cu; at least one of V, Nb and Re; Fe and unavoidable impurities of the rest. The present invention further provides a hypereutectoid steel rail prepared by the foregoing method. By the hypereutectoid steel rail preparation method provided by the present invention, the high-carbon billets with a specific composition provided by the present invention can be made into hypereutectoid steel rails with good corrosion resistance and tensile properties.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: February 5, 2019
    Assignees: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD., PANGANG GROUP PANZHIHUA STEEL & VANADIUM CO., LTD.
    Inventors: Zhenyu Han, Ming Zou, Hua Guo, Yuan Wang, Dadong Li, Yong Deng, Jun Yuan
  • Patent number: 9771529
    Abstract: A process for producing light olefins and aromatics, which comprises reacting a feedstock by contacting with a catalytic cracking catalyst in at least two reaction zones, wherein the reaction temperature of at least one reaction zone among the reaction zones downstream of the first reaction zone is higher than that of the first reaction zone and its weight hourly space velocity is lower than that of the first reaction zone, separating the spent catalyst from the reaction product vapor, regenerating the separated spent catalyst and returning the regenerated catalyst to the reactor, and separating the reaction product vapor to obtain the desired products, light olefins and aromatics. This process produces maximum light olefins such as propylene, ethylene, etc from heavy feedstocks, wherein the yield of propylene exceeds 20% by weight, and produces aromatics such as toluene, xylene, etc at the same time.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: September 26, 2017
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
    Inventors: Jun Long, Zhijian Da, Dadong Li, Xieqing Wang, Xingtian Shu, Jiushun Zhang, Hong Nie, Chaogang Xie, Zhigang Zhang, Wei Wang
  • Patent number: 9657236
    Abstract: The present invention relates to a catalyst combination for hydrotreating raw oils and a process for hydrotreating raw oils with the catalyst combination. The catalyst combination comprises one or both of at least one hydrogenation protection catalyst I and at least one hydrogenation demetalling catalyst I; at least one hydrogenation demetalling catalyst II; and at least one hydrogenation treatment catalyst III.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: May 23, 2017
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PERTROLEUM PROCESSING, SINOPEC
    Inventors: Qinghe Yang, Dawei Hu, Shuling Sun, Jia Liu, Hong Nie, Xinqiang Zhao, Xuefen Liu, Dadong Li, Lishun Dai, Zhicai Shao, Tao Liu
  • Publication number: 20170044721
    Abstract: The present invention discloses a method for preparing hypereutectoid steel rail in which the composition of the billets adopted is: C: 0.86-1.05 wt. %; Si: 0.3-1 wt. %; Mn: 0.5-1.3 wt. %; Cr: 0.15-0.35 wt. %; Cu: 0.3-0.5 wt. %; P: 0.02-0.04 wt. %; S: ?0.02 wt. %; Ni: ½-? of the content of Cu; at least one of V, Nb and Re; Fe and unavoidable impurities of the rest. The present invention further provides a hypereutectoid steel rail prepared by the foregoing method. By the hypereutectoid steel rail preparation method provided by the present invention, the high-carbon billets with a specific composition provided by the present invention can be made into hypereutectoid steel rails with good corrosion resistance and tensile properties.
    Type: Application
    Filed: August 9, 2016
    Publication date: February 16, 2017
    Applicants: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INST ITUTE CO., LTD., PANGANG GROUP PANZHIHUA STEEL & VANADIUM CO., LTD.
    Inventors: Zhenyu Han, Ming Zou, Hua Guo, Yuan Wang, Dadong Li, Yong Deng, Jun Yuan
  • Publication number: 20160194730
    Abstract: The invention relates to a high-impact-toughness steel rail and a production method thereof, and belongs to the field of steel rail material production. The present invention is to provide a high-impact-toughness steel rail. The high-impact-toughness steel rail provided in the present invention is a pearlite steel rail with 0.05˜0.09 ?m of inter-lamellar spacing and 30˜35 J of ballistic work at normal temperature; the chemical components of the steel rail in weight percentage are: C: 0.71-0.82 wt %, Si: 0.25-0.45 wt %, Mn: 0.75-1.05 wt %, V: 0.03-0.15 wt %, P: ?0.030 wt %, S: ?0.035 wt %, Al: ?0.020 wt %, and Fe and inevitable impurities of the remaining content. The U-type impact toughness of rail head of the steel rail manufactured with the method disclosed in the present invention can be 30 J or more, and the tensile strength is about 1,300 MPa or higher.
    Type: Application
    Filed: January 7, 2016
    Publication date: July 7, 2016
    Applicants: PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd., Pangang Group Panzhihua Steel & Vanadium Co., Ltd.
    Inventors: Jun YUAN, Ming ZOU, Hua GUO, Dadong LI, Yong DENG, Zhenyu HAN, Yuan WANG, Chongmu CHEN
  • Patent number: 9309467
    Abstract: Disclosed is a combination process for improved hydrotreating and catalytic cracking of hydrocarbon oils, including: contacting residual oil, catalytic cracking cycle oil, and optional distillate oil with a hydrotreating catalyst under hydrotreating conditions in the presence of hydrogen followed by separation of the reaction products to obtain gas, hydrogenated naphtha, hydrogenated diesel oil, and hydrogenated tail oil; contacting the hydrogenated tail oil and optional normal catalytic cracking feedstock oil with a cracking catalyst under catalytic cracking conditions followed by separation of the reaction products to obtain dry gas, hydrogenated naphtha, liquefied petroleum gas, catalytic cracked gasoline, catalytic cracked diesel oil, and catalytic cracking cycle oil; wherein the hydrogenated tail oil and/or normal catalytic cracking feedstock oil are separated into at least two fractions, the light and the heavy fractions or normal catalytic cracking heavy feedstock oil and normal catalytic cracking ligh
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: April 12, 2016
    Assignees: China Petroleum and Chemical Corp., Research Institute of Petroleum Processing, Sinopec
    Inventors: Yongcan Gao, Chaogang Xie, Chuanfeng Niu, Jiushun Zhang, Lishun Dai, Hong Nie, Dadong Li, Jun Long, Jianguo Ma, Yan Cui
  • Publication number: 20160060736
    Abstract: A pearlitic steel rail with high strength and toughness and a producing method thereof. The producing method comprises: controlling the following processing conditions in a rolling procedure to produce the pearlitic steel rail with high strength and toughness: initial rolling temperature of 1,120-1,180° C., final rolling temperature of 840-880° C., rail profile reduction in last two rolling passes of 6%-12%; the steel rail is cooled to 600° C. or lower at a cooling rate ?2.0° C./s after final rolling, and then air-cooled to room temperature; the chemical composition of the steel rail meets the following requirements: C: 0.75%-0.84%, Si: 0.30%-0.80%, Mn: 0.50%-1.50%, V: 0.04%-0.12%, Ti: 0.004%-0.02%, and 0.10%?V+10Ti?0.25%, [N]?30 ppm, P?0.020%, S?0.008%, with the remaining content consisting of Fe and inevitable impurities.
    Type: Application
    Filed: July 30, 2015
    Publication date: March 3, 2016
    Applicants: PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd., Pangang Group Panzhihua Steel & Vanadium Co., Ltd.
    Inventors: Zhenyu HAN, Ming ZOU, Gongming TAO, Hua GUO, Dadong LI, Yong DENG
  • Patent number: 9260667
    Abstract: Disclosed is a combination process for improved hydrotreating and catalytic cracking of hydrocarbon oils, including: contacting residual oil, catalytic cracking cycle oil, and optional distillate oil with a hydrotreating catalyst under hydrotreating conditions in the presence of hydrogen followed by separation of the reaction products to obtain hydrogenated tail oil and other products; contacting the hydrogenated tail oil and optional normal catalytic cracking feedstock oil with a cracking catalyst under catalytic cracking conditions followed by separation of the reaction products; wherein the hydrogenated tail oil and/or normal catalytic cracking feedstock oil are separated into at least two fractions prior to contacting the hydrogenated tail oil and/or normal catalytic cracking feedstock oil with the cracking catalyst.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: February 16, 2016
    Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
    Inventors: Yongcan Gao, Chaogang Xie, Chuanfeng Niu, Jiushun Zhang, Lishun Dai, Hong Nie, Dadong Li, Jun Long, Jianguo Ma, Yan Cui
  • Publication number: 20160010188
    Abstract: The present invention relates to a heat treatment method for increasing the depth of hardening layer in a steel rail, and belongs to the field of steel rail production process. The technical problem to be solved in the present invention is to provide a heat treatment method for increasing the depth of hardening layer in a steel rail and a steel rail obtained with the method. The method comprises the following steps: cooling a finished rolling steel rail by natural cooling, till the temperature at the center of rail head surface is 660˜730° C.; cooling the steel rail by accelerated cooling at 1.5˜3.5° C./s cooling rate, till the temperature at the center of rail head surface is 500˜550° C.; increasing the cooling rate by 1.0˜2.0° C./s and further cooling down the steel rail, till the temperature at the center of rail head surface is 450° C. or lower; then, stopping the accelerated cooling, and cooling down the steel rail by air cooling to room temperature.
    Type: Application
    Filed: July 14, 2015
    Publication date: January 14, 2016
    Applicants: PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd., Pangang Group panzhihua Steel & Vanadium Co., Ltd.
    Inventors: Zhenyu Han, Ming Zou, Jihai Jia, Hua Guo, Dadong Li, Yong Deng, Chunjian Wang, Jun Yuan, Chongmu Chen
  • Publication number: 20150322553
    Abstract: The present invention discloses a bainitic steel rail containing trace amounts of carbides, wherein, the bainitic steel rail mainly consists of bainitic structures, the carbides have a length of 0.05-0.5 ?m, the major axis of carbides is oriented to a direction at a 50-70° included angle from the direction of the major axis of bainitic ferrite plates, and the carbides account for 1%-5% by volume. The present invention further discloses a method for producing a bainitic steel rail containing trace amounts of carbides, comprising: cooling a steel rail with residual heat after finish rolling by air cooling, till the temperature at the center of the rail head tread reaches 420-450° C.; cooling the rail head part of the steel rail by accelerated cooling at a 2.0-5.0° C./s cooling rate, till the temperature at the center of the rail head tread reaches 220-240° C.; loading the steel rail into a tempering furnace and tempering at 300-350° C.
    Type: Application
    Filed: May 1, 2015
    Publication date: November 12, 2015
    Applicant: PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd.
    Inventors: Zhenyu Han, Ming Zou, Jihai Jia, Hua Guo, Dadong Li, Yong Deng, Chunjian Wang, Jun Yuan
  • Patent number: 8883669
    Abstract: The present invention relates to a hydrocracking catalyst comprising an acidic silica-alumina, an optional alumina, an effective quantity of at least one VIII Group metal component(s), an effective quantity of at least one VIB Group metal component(s) and an organic additive, wherein the organic additive is one or more selected from the group consisting of an oxygen-containing or nitrogen-containing organic compound, and the molar ratio of the organic additive to the VIII Group metal component(s) is 0.01-10. The present invention relates further to a process for producing the hydrocracking catalyst and use of the catalyst in a process for hydrocracking hydrocarbon oils. The hydrocracking catalyst provided according to the present invention shows a higher activity for aromatic hydrosaturating and ring-opening reaction, as compared with the prior art hydrocracking catalyst.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: November 11, 2014
    Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
    Inventors: Yichao Mao, Hong Nie, Jianwei Dong, Zhenlin Xiong, Zhihai Hu, Yahua Shi, Dadong Li
  • Publication number: 20140275673
    Abstract: A process for producing light olefins and aromatics, which comprises reacting a feedstock by contacting with a catalytic cracking catalyst in at least two reaction zones, wherein the reaction temperature of at least one reaction zone among the reaction zones downstream of the first reaction zone is higher than that of the first reaction zone and its weight hourly space velocity is lower than that of the first reaction zone, separating the spent catalyst from the reaction product vapor, regenerating the separated spent catalyst and returning the regenerated catalyst to the reactor, and separating the reaction product vapor to obtain the desired products, light olefins and aromatics. This process produces maximum light olefins such as propylene, ethylene, etc from heavy feedstocks, wherein the yield of propylene exceeds 20% by weight, and produces aromatics such as toluene, xylene, etc at the same time.
    Type: Application
    Filed: June 2, 2014
    Publication date: September 18, 2014
    Applicants: CHINA PETROLEUM CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
    Inventors: Jun LONG, Zhijian DA, Dadong LI, Xieqing WANG, Xingtian SHU, Jiushun ZHANG, Hong NIE, Chaogang XIE, Zhigang ZHANG, Wei WANG
  • Patent number: 8778170
    Abstract: A process for producing light olefins and aromatics, which comprises reacting a feedstock with a catalytic cracking catalyst in at least two reaction zones, wherein the reaction temperature of at least one reaction zone downstream of the first reaction zone is higher than that of the first reaction zone and its weight hourly space velocity is lower than that of the first reaction zone. The spent catalyst is separated, from the reaction product vapor, regenerated, and then returned to the reactor. The reaction product vapor is separated to obtain the desired products, light olefins and aromatics. This process efficiently produces light olefins such as propylene, ethylene, etc from heavy feedstocks, wherein the yield of propylene exceeds 20% by weight, and produces aromatics such as toluene, xylene, etc at the same time.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: July 15, 2014
    Assignees: China Petroleum Chemical Corporation, Research Institute of Petroleum Processing Sinopec
    Inventors: Jun Long, Zhijian Da, Dadong Li, Xieqing Wang, Xingtian Shu, Jiushun Zhang, Hong Nie, Chaogang Xie, Zhigang Zhang, Wei Wang
  • Patent number: 8697598
    Abstract: The present invention provides a hydrogenation catalyst, containing a carrier, metal components of nickel, molybdenum and tungsten supported thereon, and an adjuvant component selected from the group consisting of fluorine and phosphor and combination thereof. In another embodiment, the present invention provides a hydrogenation catalyst, containing a carrier and metal components of nickel, molybdenum and tungsten supported thereon, wherein said carrier contains a molecular sieve. The present invention provides further use of said catalyst in the process for hydrogenating hydrocarbon oil. In comparison with a hydrogenation catalyst according to the prior art, the catalyst according to the present invention has a much higher activity.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: April 15, 2014
    Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, SINOPEC
    Inventors: Xiangyun Long, Xuefen Liu, Hong Nie, Kui Wang, Jing Xin, Qinghe Liu, Xiaodong Gao, Zhihai Hu, Yahua Shi, Dadong Li
  • Publication number: 20140001090
    Abstract: The present invention relates to a catalyst combination for hydrotreating raw oils and a process for hydrotreating raw oils with the catalyst combination. The catalyst combination comprises one or both of at least one hydrogenation protection catalyst I and at least one hydrogenation demetalling catalyst I; at least one hydrogenation demetalling catalyst II; and at least one hydrogenation treatment catalyst III.
    Type: Application
    Filed: March 29, 2013
    Publication date: January 2, 2014
    Applicants: RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC, CHINA PETROLEUM & CHEMICAL CORPORATION
    Inventors: Qinghe YANG, Dawei Hu, Shuling Sun, Jia Liu, Hong Nie, Xinqiang Zhao, Xuefen Liu, Dadong Li, Lishun Dai, Zhicai Shao, Tao Liu
  • Patent number: 8529753
    Abstract: Disclosed is a combined process for hydrotreating and catalytic cracking of residue, wherein the residue, catalytic cracking heavy cycle oil with acidic solid impurity being removed, optional distillate oil and adistillate of catalytic cracking slurry oil from which the acidic solid impurity is removed are fed into residue hydrotreating unit, the hydrogenated residue obtained and optional vacuum gas oil are fed into catalytic cracking unit to obtain various products; the catalytic cracking heavy cycle oil from which the acidic solid impurity is removed is circulated to the residue hydrotreating unit; the catalytic cracking slurry oil is separated by distilling, the distillate of the catalytic cracking slurry oil after removing off the acidic solid impurity is circulated to the residue hydrotreating unit.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: September 10, 2013
    Assignees: Research Institute of Petroleum Processing, Sinopec, China Petroleum & Chemical Corporation
    Inventors: Chuanfeng Niu, Lishun Dai, Yongcan Gao, Dadong Li, Yahua Shi, Hong Nie, Qinghe Yang