Patents by Inventor Matu J. Shah

Matu J. Shah 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).

  • Patent number: 6680278
    Abstract: The invention is directed to a method of synthesising silicoaluminophosphate molecular sieves using synthesis templates that contain at least one dimethylamino moiety. The use of dimethylamino moiety containing templates results in good quality SAPO molecular sieves of CHA framework type.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: January 20, 2004
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: Guang Cao, Matu J. Shah
  • Publication number: 20030232006
    Abstract: The invention is directed to a method of synthesising silicoaluminophosphate molecular sieves using synthesis templates that contain at least one dimethylamino moiety, selected from one or more of N,N-dimethylethanolamine, N,N-dimethylpropanolamine, N,N-dimethylbutanolamine, N,N-dimethylheptanolamine, N,N-dimethylhexanolamine, N,N-dimethylethylenediamine, N,N-dimethylbutylenediamine, N,N-dimethylheptylenediamine, N,N-dimethylhexylenediamine 1-dimethylamino-2-propanol, N,N-dimethylethylamine, N,N-dimethylpropylamine, N,N-dimethylpentylamine, N,N-dimethylhexylamine and N,N-dimethylheptylamine. The use of dimethylamino moiety containing templates results in good quality SAPO molecular sieves of CHA framework type.
    Type: Application
    Filed: April 24, 2003
    Publication date: December 18, 2003
    Inventors: Guang Cao, Matu J. Shah
  • Publication number: 20030231999
    Abstract: The invention is directed to a method for preparing microporous aluminophosphate or silicoaluminophosphate molecular sieves having the CHA framework type, the process comprising the steps of a) forming a reaction mixture comprising a source of aluminum, a source of phosphorus, optionally a source of silicon, at least one source of fluoride ions and at least one template containing one or more N,N-dimethylamino moieties, b) inducing crystallization of aluminophosphate and/or silicoaluminophosphate molecular sieve from the reaction mixture; c) recovering aluminophosphate and/or silicoaluminophosphate molecular sieve from the reaction mixture. The invention also relates to the molecular sieves obtained by this method and to molecular sieve catalyst compositions containing these molecular sieves.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 18, 2003
    Inventors: Guang Cao, Matu J. Shah, Karl G. Strohmaier, Richard B. Hall
  • Publication number: 20030232718
    Abstract: The invention is directed to a method of synthesising silicoaluminophosphate molecular sieves using synthesis templates that contain at least one dimethylamino moiety. The use of dimethylamino moiety containing templates results in good quality SAPO molecular sieves of CHA framework type.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 18, 2003
    Inventors: Guang Cao, Matu J. Shah
  • Patent number: 6660682
    Abstract: The invention is directed to a method of synthesizing a molecular sieve. In particular, the invention is directed to a method for synthesizing a molecular sieve, especially a silicoaluminophosphate molecular sieve, in the presence of a templating agent and a polymeric base. The invention is also directed to formulating the molecular sieve into a catalyst useful in a process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: December 9, 2003
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Guang Cao, Matu J. Shah
  • Patent number: 6620983
    Abstract: The invention is directed to a method of synthesizing aluminophosphate or silicoaluminophosphate molecular sieves and in particular to the synthesis of silicoaluminophosphate molecular sieves using synthesis templates in combination with a source of fluoride comprising at least two fluoride substituents. The use of such fluorine containing compounds results in good quality low silica SAPO molecular sieves of CHA framework type.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: September 16, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Guang Cao, Matu J. Shah, Karl G. Strohmaier, Richard B. Hall
  • Publication number: 20030105248
    Abstract: The invention is directed to a method of synthesizing a molecular sieve. In particular, the invention is directed to a method for synthesizing a molecular sieve, especially a silicoaluminophosphate molecular sieve, in the presence of a templating agent and a polymeric base. The invention is also directed to formulating the molecular sieve into a catalyst useful in a process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Inventors: Guang Cao, Matu J. Shah
  • Patent number: 6080303
    Abstract: The present invention provides a process for improving the catalytic activity of small and medium pore acidic zeolite catalyst which comprises the steps of treating a zeolite with a phosphorus compound to form a phosphorus treated zeolite and combining the phosphorus treated zeolite with AlPO.sub.4. Optionally the phosphorus treated zeolite is calcined. The step of combining the zeolite with AlPO.sub.4 may optionally be followed by steaming the combined catalyst. Examples of useful phosphorus containing compounds useful in treating the zeolite include phosphoric acid, ammonium mono or dihydrogen phosphate, organic phosphites, and organophosphines. Preferably the phosphorus containing compound is an ammonium acid phosphate. An additional alternate embodiment provides a process for increasing the hydrothermal stability of a zeolite catalyst which comprises first treating a zeolite with a phosphorus containing compound then blending with AlPO.sub.4.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: June 27, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Guang Cao, Luc R. M. Martens, Jeffrey L. White, Tan-Jen Chen, Matu J. Shah