Patents by Inventor M. H. Chen

M. H. Chen 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).

  • Novel silicon-modified catalyst Si/HZSM-5 preparation
    Patent number: 4849386
    Abstract: This invention relates to the preparation of a novel Si/HZSM-5 catalyst through vapor phase deposition of Si on the surface of HZSM-5 catalyst which is obtained by ion exchanging ZSM-5 catalyst. The source of depositing Si comes from tetraalkyl ortho-silicate (or tetra-alkoxy silane), Si(OR)4, wherein R represents the alkyl group that contains 1-4 carbon atoms. The silicon deposit will substantially not clog the pores of the catalyst.The present invention is to make use of the modified catalyst in the alkylation or disproportionation reactions in order to enhance the yield of p-dialkylbenzene as an ingredient in the final product of aryl compounds such as toluene or ethylbenzene.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: July 18, 1989
    Assignee: Taiwan Styrene Monomer Corporation
    Inventors: I. Kai Wang, Biing-Jye Lee, M. H. Chen