Patents by Inventor Huarong Zhu

Huarong Zhu 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).

  • Process for preparing diarylamines from arylamines
    Patent number: 5648538
    Abstract: A process for preparing diarylamines in high yield, in which diarylamines are prepared from arylamines in the presence of a solid acid catalyst. The solid acid catalyst with good stability and regeneration ability consists of H-type beta zeolite and active alumina, the ratio of SiO.sub.2 /Al.sub.2 O.sub.3 in the zeolite is 20.about.100, and the content of active alumina is 10%.about.70% (wt).
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: July 15, 1997
    Assignees: Fushun Research Institute of Petroleum and Petrochemicals, China Petrochemical Corp.
    Inventors: Xiusen Liu, Huarong Zhu, Fubin Ai, Lizhi Song, Zhihui Lu, Xuewei Hou