Patents by Inventor Maria Filipa Gomes Ribeiro

Maria Filipa Gomes Ribeiro 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).

  • Catalyst with a base of modified MFI zeolite, and its use in the isomerization of a C8 aromatic cut
    Patent number: 6245704
    Abstract: The invention is concerned with a catalyst comprising a matrix, a MFI type zeolite and at least one group VIII element, in which the crystals of the MFI type zeolite are desaluminated on their outer surface by at least one treatment with at least one solution of a fluorosilicate of a cation selected from the group formed by NH4+, alkylammoniums, K+, Na+, Li+, Ba2+, Mg2+, Cd2+, Cu+, Cu2+, Ca2+, Cs+, Fe2+, Co2+, Pb2+, Mn2+, Rb+, Ag+, Sr2+, Zn2+, Tl+ and H+, the global desalumination rate of said MFI zeolite thus treated being less than 5 atomic per cent.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: June 12, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Eric Benazzi, Jean-Francois Joly, Joao Miguel Da Silva, Maria Filipa Gomes Ribeiro
  • Catalyst with a base of modified MFI zeolite, and its use in the isomerization of a C.sub.8 aromatic cut
    Patent number: 6130363
    Abstract: The invention is concerned with a catalyst comprising a matrix, a MFI type zeolite and at least one group VIII element, in which the crystals of the MFI type zeolite are desaluminated on their outer surface by at least one treatment with at least one solution of a fluorosilicate of a cation selected from the group formed by NH.sub.4.sup.+, alkylammoniums, K.sup.+, Na.sup.+, Li.sup.+, Ba.sup.2+, Mg.sup.2+, Cd.sup.2+, Cu.sup.+, Cu.sup.2+, Ca.sup.2+, Cs.sup.+, Fe.sup.2+, Co.sup.2+, Pb.sup.2+, Mn.sup.2+, Rb.sup.+, Ag.sup.+, Sr.sup.2+, Zn.sup.2+, Tl.sup.+ and H.sup.+, the global desalumination rate of said MFI zeolite thus treated being less than 5 atomic percent.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: October 10, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Eric Benazzi, Jean-Francois Joly, Joao Miguel Da Silva, Maria Filipa Gomes Ribeiro