Patents by Inventor Yichao Mao

Yichao Mao 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: 20200368886
    Abstract: The present application discloses an apparatus for mounting an O-ring to a work piece, which includes a body including a plurality of connecting holes for connecting a pressure source to the body; an annular groove formed on the body and adapted to receive the O-ring; and a plurality of air channels formed in the body, the plurality of air channels being in fluid communication with the annular groove and the plurality of connecting holes to provide negative pressure with the pressure source in the annular groove to suck the O-ring in the annular groove, the annular groove is coaxial with a groove formed on a surface of the work piece during the mounting so that the O-ring is dropped into the groove when the pressure source is disconnected from the body or provides positive pressure to the plurality of air channels.
    Type: Application
    Filed: August 12, 2020
    Publication date: November 26, 2020
    Inventors: Cheng Li, Feifei Zhao, Yichao Mao
  • Publication number: 20200338540
    Abstract: A phosphorus-containing molecular sieve has a phosphorus content of about 0.3-5 wt %, a pore volume of about 0.2-0.95 ml/g, and a ratio of B acid content to L acid content of about 2-10. The molecular sieve has a specific combination of characteristics, including a high ratio of B acid content to L acid content, thereby exhibiting higher hydrocracking activity and ring-opening selectivity when used in the preparation of a hydrocracking catalyst.
    Type: Application
    Filed: October 22, 2018
    Publication date: October 29, 2020
    Inventors: Yichao MAO, Mingfeng LI, Xiangyun LONG, Runqiang ZHANG, Yang ZHAO
  • Patent number: 9469817
    Abstract: A hydrocracking catalyst comprises a support, at least one of VIII Group metal components, and at least one of VIB Group metal components. The support comprises an acidic silica-alumina component and alumina derived from a pseudo-boehmite component, wherein the content of the acidic silica-alumina component is 3-80 wt %, the content of alumina derived from the pseudo-boehmite component is 20-95 wt %, based on the support. The support is obtained by mixing, molding, drying and calcining the acidic silica-alumina component with the pseudo-boehmite component, wherein said pseudo-boehmite component comprises pseudo-boehmite PB1 and pseudo-boehmite PB2, wherein the content of PB1 is 10-90 wt % and the content of PB2 is 0-60 wt % on a dry basis and based on the support.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: October 18, 2016
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
    Inventors: Yichao Mao, Hong Nie, Mingfeng Li, Qinghe Yang, Zhihai Hu, Runqiang Zhang, Guangle Zhao
  • Publication number: 20150231618
    Abstract: A hydrocracking catalyst comprises a support, at least one of VIII Group metal components, and at least one of VIB Group metal components. The support comprises an acidic silica-alumina component and alumina derived from a pseudo-boehmite component, wherein the content of the acidic silica-alumina component is 3-80 wt %, the content of alumina derived from the pseudo-boehmite component is 20-95 wt %, based on the support. The support is obtained by mixing, moulding, drying and calcining the acidic silica-alumina component with the pseudo-boehmite component, wherein said pseudo-boehmite component comprises pseudo-boehmite PB1 and pseudo-boehmite PB2, wherein the content of PB1 is 10-90 wt % and the content of PB2 is 0-60 wt % on a dry basis and based on the support.
    Type: Application
    Filed: February 19, 2015
    Publication date: August 20, 2015
    Inventors: Yichao MAO, Hong NIE, Mingfeng LI, Qinghe YANG, Zhihai HU, Runqiang ZHANG, Guangle ZHAO
  • 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
  • Patent number: 8334231
    Abstract: The present invention provides a hydrocracking catalyst comprising a moulded composite support of a zeolite molecular sieve with alumina, at least one of VIII Group metal components, at least one of VIB Group metal components and an organic additive; said organic additive is one or more compounds selected from the group consisting of oxygen-containing or nitrogen-containing organic compounds; the content of said zeolite molecular sieve is 3˜60 wt %, the content of said alumina is 10˜80 wt %, and the content of said organic additive is 0.1˜40 wt % based on the weight of said catalyst; the content of said VIII Group metal component is 1˜15 wt % and the content of said VIB Group metal component is 5˜40 wt % as calculated on oxide and based on the weight of said catalyst. The present invention relates also to a preparation method of said hydrocracking catalyst and use of the catalyst in the hydrocracking process of hydrocarbon oil.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: December 18, 2012
    Assignees: China Petroleum and 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: 20110127192
    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: Application
    Filed: December 3, 2010
    Publication date: June 2, 2011
    Applicants: 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: 20100032341
    Abstract: The present invention provides a hydrocracking catalyst comprising a moulded composite support of a zeolite molecular sieve with alumina, at least one of VIII Group metal components, at least one of VIB Group metal components and an organic additive; said organic additive is one or more compounds selected from the group consisting of oxygen-containing or nitrogen-containing organic compounds; the content of said zeolite molecular sieve is 3˜60 wt %, the content of said alumina is 10˜80 wt %, and the content of said organic additive is 0.1˜40 wt % based on the weight of said catalyst; the content of said VIII Group metal component is 1˜15 wt % and the content of said VIB Group metal component is 5˜40 wt % as calculated on oxide and based on the weight of said catalyst. The present invention relates also to a preparation method of said hydrocracking catalyst and use of the catalyst in the hydrocracking process of hydrocarbon oil.
    Type: Application
    Filed: April 26, 2006
    Publication date: February 11, 2010
    Inventors: Yichao Mao, Hong Nie, Jianwei Dong, Zhenlin Xiong, Zhihai Hu, Dadong Li
  • Publication number: 20080190811
    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: Application
    Filed: April 26, 2006
    Publication date: August 14, 2008
    Applicants: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPE
    Inventors: Yichao Mao, Hong Nie, Jianwei Dong, Zhenlin Xiong, Zhihai Hu, Yahua Shi, Dadong Li