Mtw; E.g., Zsm-12, Nu-13, Czh-5, Tpz-3 Patents (Class 423/DIG33)
  • Catalyst compositions derived from titanium-containing molecule sieves
    Patent number: 5977009
    Abstract: Useful catalyst compositions are produced by treating substituted molecular sieves with reactive titanium compounds such as titanium tetrahalides, preferably in the vapor phase at elevated temperatures. The molecular sieve starting materials contain tellurium, boron or germanium oxides in addition to silicon and titanium oxides. Olefins are efficiently transformed to epoxides using these catalyst compositions and an oxidizing agent such as hydrogen peroxide or an organic hydroperoxide.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: November 2, 1999
    Assignee: Arco Chemical Technology, LP
    Inventor: Mahmoud K. Faraj
  • MTW zeolite for cracking feedstock into olefins and isoparaffins
    Patent number: 5952257
    Abstract: The present invention relates to a zeolite catalyst, a process for using the catalyst for conversion of hydrocarbons, especially naphtha and LPG feedstock, and a process for preparing the catalyst.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: September 14, 1999
    Assignee: Intevep, S.A.
    Inventors: Jorge Tejada, Juan Lujano, Yilda Romero
  • MTW zeolite for cracking feedstock into olefins and isoparaffins
    Patent number: 5800801
    Abstract: The present invention relates to a zeolite catalyst, a process for using the catalyst for conversion of hydrocarbons, especially naphtha and LPG feedstock, and a process for preparing the catalyst.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: September 1, 1998
    Assignee: Intevep, S.A.
    Inventors: Jorge Tejada, Juan Lujano, Yilda Romero
  • Preparation of zeolites using organic template and amine
    Patent number: 5785947
    Abstract: Crystalline zeolites are prepared using a small quantity of an organic templating compound and a larger quantity of an amine component containing at least one amine having from one to eight carbon atoms, ammonium hydroxide, or mixtures thereof.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: July 28, 1998
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stacey I. Zones, Yumi Nakagawa
  • Process for producing substantially binder-free zeolite
    Patent number: 5665325
    Abstract: Silica-bound extruded zeolites may be converted into binder-free zeolite aggregates by aging the zeolite in an aqueous ionic solution which contains hydroxy ions such that the initial molar ratio of OH.sup.- :SiO.sub.2 is up to 1.2 and which causes the silica binder to be converted substantially to zeolite of the type initially bound. Such extrudates have excellent mechanical strength and show advantageous properties such as adsorption comparable with non-extruded zeolite powder.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: September 9, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Johannes Petrus Verduijn
  • MTW zeolite for cracking feedstock into olefins and isoparaffins
    Patent number: 5628978
    Abstract: The present invention relates to a zeolite catalyst, a process for using the catalyst for conversion of hydrocarbons, especially naphtha and LPG feedstock, and a process for preparing the catalyst.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: May 13, 1997
    Assignee: Intevep, S.A.
    Inventors: Jorge Tejada, Juan Lujano, Yilda Romero
  • Preparation of aluminosilicate zeolites
    Patent number: 5558851
    Abstract: A method is disclosed for preparing a crystalline aluminosilicate zeolite from a reaction mixture containing only sufficient water so that the reaction mixture may be shaped if desired. In the method, the reaction mixture is heated at crystallization conditions and in the absence of an external liquid phase, so that excess liquid need not be removed from the crystallized material prior to drying the crystals.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: September 24, 1996
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stephen J. Miller
  • Process for producing substantially binder-free zeolite
    Patent number: 5460796
    Abstract: Silica-bound extruded zeolites may be converted into binder-free zeolite aggregates by aging the zeolite in an aqueous ionic solution which contains hydroxy ions such that the initial molar ratio of OH-:SiO.sub.2 is up to 1.2 and which causes the silica binder to be converted substantially to zeolite of the type initially bound. Such extrudates have excellent mechanical strength and show advantageous properties such as adsorption comparable with non-extruded zeolite powder.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: October 24, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Johannes P. Verduijn
  • Method for preparing crystalline materials using heterobridged aza-polycyclic templating agents
    Patent number: 5425933
    Abstract: Molecular sieves, particularly zeolites, are prepared using heterobridged aza-polycyclic templates. The templates may be prepared in a series of reaction steps which include a Diels-Alder reaction between a diene and a dienophile.
    Type: Grant
    Filed: February 8, 1994
    Date of Patent: June 20, 1995
    Assignee: Chevron Research and Technology Company, A Division of Chevron U.S.A. Inc.
    Inventor: Yumi Nakagawa