Patents by Inventor Youhao Xu

Youhao Xu 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: 20100248942
    Abstract: The object of the present invention is to provide a catalyst regeneration process which can improve catalyst selectivity. A first aspect of the invention is characterized in that a spent catalyst from a reactor is introduced into a first fluidized bed regenerator and contacted with an oxygen-containing gas stream and optional steam to carry out a coke combustion reaction, wherein the resultant mixture of the partially regenerated catalyst and flue gas is introduced into a second fluidized bed regenerator and contacted with steam and an optional oxygen-containing gas stream to carry out a further regeneration reaction, and then the regenerated catalyst is introduced into the reactor. A second aspect of the invention is characterized in that a spent catalyst from a reactor is introduced into a fluidized dense bed regenerator and contacted with an oxygen-containing gas stream and steam to carry out a coke combustion reaction, and then the regenerated catalyst is introduced into the reactor.
    Type: Application
    Filed: March 30, 2010
    Publication date: September 30, 2010
    Applicants: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
    Inventors: Youhao Xu, Shouye Cui, Zhigang Zhang, Weimin Lu
  • Publication number: 20100213102
    Abstract: A catalytic conversion process which comprises catalytic cracking reaction of a hydrocarbon feedstock contacting with a medium pore size zeolite enriched catalyst in a reactor, characterized in that reaction temperature, weight hourly space velocity and catalyst/feedstock ratio by weight are sufficient to achieve a yield of fluid catalytic cracking gas oil between 12% and 60% by weight of said feedstock, wherein said weight hourly space velocity is between 25 h?1 and 100 h?1, said reaction temperature is between 450° C. and 600° C., and said catalyst/feedstock ratio by weight is between 1 and 30. This invention relates to a catalytic conversion process, especially for heavy feedstock oil to produce higher octane gasoline and an enhanced yield of propylene. More particularly, the invention relates to a process to utilize petroleum oil resources efficiently for decreasing the yield of dry gas and coke significantly.
    Type: Application
    Filed: August 7, 2008
    Publication date: August 26, 2010
    Inventors: Youhao Xu, Lishun Dai, Longsheng Tian, Shouye Cui, Jianhong Gong, Chaogang Xie, Jiushun Zhang, Jun Long, Zhijian Da, Hong Nie, Jinbiao Guo, Zhigang Zhang
  • Patent number: 7678342
    Abstract: A riser reactor for fluidized catalytic conversion process consists of a prelift zone, a first reaction zone, a second reaction zone with enlarged diameter, an outlet zone with reduced diameter along coaxial direction form bottom to top, and the end of the outlet zone connects to a horizontal tube. The reactor is used for adjusting different operating conditions to process single or plural feedstock in each different reaction zone for producing the desired product.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: March 16, 2010
    Assignees: China Petrochemical Corporation, Research Institute of Petroleum Processing, SINOPEC
    Inventors: Youhao Xu, Bende Yu, Zhigang Zhang, Jun Long, Fukang Jlang
  • Patent number: 6495028
    Abstract: A process for catalytic conversion of hydrocarbon feedstock to produce isobutane and isoparaffin-enriched gasoline which comprises two different reactions, the preheated feedstock is contacted with hot regenerated catalyst in the lower part of a reactor with the result that catalytic cracking reaction takes place, and the mixture of vapors and the coke deposited catalyst are up-flowed and enter into a suitable reaction environment with the result that isomerization and hydrogen transfer reaction take place. The produced LPG has an isobutane content of about 20 wt % to about 40 wt % and the produced gasoline contains isoparaffin content of about 30 wt % to about 45 wt % and olefin content of less than 30 wt %. RON and MON of the gasoline are 90˜93 and 80˜84 respectively.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: December 17, 2002
    Assignees: China Petroleum Corporation, Research Institute of Petroleum Processing
    Inventors: Youhao Xu, Jiushun Zhang, Yinan Yang, Jun Long, Xieqing Wang, Zaiting Li, Raichi Zhang