Patents by Inventor Johannes Petrus Verduijn
Johannes Petrus Verduijn 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).
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Patent number: 6090289Abstract: Structures comprising an upper crystalline molecular sieve layer on a support, the crystals being at least partially oriented normal to the plane of the layer, there being a dense intermediate crystalline molecular sieve layer between the support and upper layer.Type: GrantFiled: April 3, 1997Date of Patent: July 18, 2000Assignee: Exxon Research & Engineering Co.Inventors: Johannes Petrus Verduijn, Antonie Jan Bons, Marc Henri Carolina Anthonis, Lothar Ruediger Czarnetzki, Wilfried Jozef Mortier
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Patent number: 6042808Abstract: Low temperature hydrothermal treatment of an LTL zeolite-producing mixture produces a colloidal suspension of the zeolite; the suspension may be used as seeds in Al-- and Ga--LTL zeolite manufacture.Type: GrantFiled: June 20, 1997Date of Patent: March 28, 2000Assignee: Exxon Chemical Patents Inc.Inventors: Johannes Petrus Verduijn, Machteld M Mertens, Marc H Anthonis
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Patent number: 6039864Abstract: There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions. The catalyst comprises a first zeolite having particles of greater than about 0.1 micron average particle size and a binder comprising second zeolite particles having an average particle size less than said first particles.Type: GrantFiled: May 19, 1998Date of Patent: March 21, 2000Assignee: Exxon Chemical Patents Inc.Inventors: Gary David Mohr, Johannes Petrus Verduijn
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Patent number: 6040259Abstract: There is provided a zeolite bound zeolite catalyst which does not contain significant amounts of non-zeolitic binder and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The catalyst comprises first zeolite, crystals, a binder comprising second zeolite crystals and a hydrogenation/dehydrogenation metal. The zeolite bound zeolite catalyst is prepared by converting the silica binder of a silica bound aggregate containing the first crystals of said first zeolite and at least a portion of the hydrogenation/dehydrogenation metal to said second zeolite. The zeolite bound zeolite catalyst has excellent performance when used in hydrocarbon conversion processes such as naphtha reforming and xylenes isomerization/ethylbenzene conversion.Type: GrantFiled: May 29, 1997Date of Patent: March 21, 2000Assignee: Exxon Chemical Patents Inc.Inventors: Gary David Mohr, Johannes Petrus Verduijn
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Patent number: 6019956Abstract: Colloidal Offretite, a process for its manufacture, and zeolite manufacture using it.Type: GrantFiled: June 20, 1997Date of Patent: February 1, 2000Assignee: Exxon Chemical Patents Inc.Inventor: Johannes Petrus Verduijn
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Patent number: 6013851Abstract: A molecular sieve comprising a core having deposited thereon a surface layer, wherein the surface layer has a higher Si:Al ratio than that of the core, provides for lower branching in olefin oligomerization products.Type: GrantFiled: October 27, 1997Date of Patent: January 11, 2000Assignee: Exxon Chemical Patents, Inc.Inventors: Wim Herman Verrelst, Luc Roger Marc Martens, Johannes Petrus Verduijn
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Patent number: 6008425Abstract: A process for isomerizating a feed containing alkylaromatic hydrocarbons, e.g., monocyclic alkylaromatic hydrocarbons and/or bicyclic alkylaromatic hydrocarbons. The process is carried out by contacting the feed under conversion conditions with a zeolite bound zeolite catalyst which comprises first crystals of an intermediate pore size first zeolite and a binder which comprises second crystals of a second zeolite. The process finds particular applications in isomerizing a feed containing ethylbenzene and less than equilibrium amounts of xylenes with ethylbenzene and can produce a product containing above equilibrium quantities of para-xylene and low aromatics ring loss and xylene loss.Type: GrantFiled: May 29, 1997Date of Patent: December 28, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Gary D. Mohr, Johannes Petrus Verduijn
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Patent number: 5993642Abstract: There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions. The catalyst comprises a first zeolite having particles of greater than about 0.1 micron average particle size and a binder comprising second zeolite particles having an average particle size less than said first particles.Type: GrantFiled: November 22, 1995Date of Patent: November 30, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Gary David Mohr, Tan Jen Chen, Kenneth Ray Clem, Mechilium Johannes Geradus Janssen, Phillip Andrew Ruziska, Johannes Petrus Verduijn, Jannetje Maatje van den Berge
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Patent number: 5958366Abstract: Large crystal zeolites are prepared by heating a zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the zeolite synthesis mixture and thereafter the zeolite synthesis mixture is heated without agitation to a temperature equal to or greater than the effective nucleation temperature of the zeolite synthesis mixture.Type: GrantFiled: October 17, 1997Date of Patent: September 28, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Robert Scott Smith, Johannes Petrus Verduijn, deceased, Jannetje Maatje van den Berge, executrix, Thomas H. Colle, Gary David Mohr, Gotz Burgfels, Josef Schonlinner
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Patent number: 5919722Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.Type: GrantFiled: February 3, 1997Date of Patent: July 6, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Johannes Petrus Verduijn, Pieter Ernst Gellings
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Patent number: 5871650Abstract: The present invention is directed toward a new zeolite membrane which exhibits a columnar cross-sectional morphology and preferred crystallographic orientation comprising a porous substrate having coated thereon a mesoporous growth enhancing layer and a layer of columnar zeolite crystals on said mesoporous growth enhancing layer, and wherein said mesoporous growth enhancing layer comprises nanocrystalline or colloidal sized zeolites, nanocrystalline or colloidal zeolite and metal oxide, or nanocrystalline or colloidal zeolite and colloidal metal, or nanocrystalline or colloidal zeolite, colloidal metal and metal oxide, and wherein said mesoporous growth enhancing layer has interstices of about 20 to about 2000 .ANG., and wherein said columnar zeolite layer is a polycrystalline layer wherein 99.9% of said columnar zeolite crystals have at least one point between adjacent crystals that is .ltoreq.20 .ANG..Type: GrantFiled: July 8, 1994Date of Patent: February 16, 1999Assignee: Exxon Research and Engineering CompanyInventors: Wenyih Frank Lai, Harry William Deckman, James Alexander McHenry, Johannes Petrus Verduijn
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Patent number: 5866096Abstract: ZSM-22 zeolite which is particularly pure and whose synthesis does not require the synthesis mixture to be stirred can be produced by the addition to the synthesis mixture of a small quantity e.g. 1000 ppm, of preformed ZSM-22 zeolite seed crystals.Type: GrantFiled: December 9, 1994Date of Patent: February 2, 1999Assignee: Exxon Chemical Patents, Inc.Inventors: Johannes Petrus Verduijn, Luc Roger Marc Martens
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Patent number: 5855863Abstract: Binderless particles of zeolite L of very high mechanical strength are prepared by a process which comprises forming a mixture by reacting substantially binderless particles of zeolite L, preferably as shaped particles such as extrudates, with an aqueous alkaline solution containing sources of alkali metal, at least 50 mole % of which is potassium, and aluminium to obtain the desired particles of very high mechanical strength. The zeolite L thus obtained can form part of a dehydrocyclisation and/or isomerisation catalyst.Type: GrantFiled: June 5, 1995Date of Patent: January 5, 1999Assignee: Exxon Chemical Patents Inc.Inventor: Johannes Petrus Verduijn
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Patent number: 5849967Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.Type: GrantFiled: June 7, 1995Date of Patent: December 15, 1998Assignee: Exxon Chemical Patents Inc. (ECPI)Inventors: Johannes Petrus Verduijn, Pieter Ernst Gellings
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Patent number: 5783168Abstract: ZSM-22 zeolite which is particularly pure and whose synthesis does not require the synthesis mixture to be stirred can be produced by the addition to the synthesis mixture of a small quantity e.g. 1000 ppm, of preformed ZSM-22 zeolite seed crystals.Type: GrantFiled: October 16, 1996Date of Patent: July 21, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Johannes Petrus Verduijn, Luc Roger Marc Martens
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Patent number: 5783321Abstract: Crystalline tectosilicate ZSM-5 zeolite may be prepared which comprise substantially needle-shaped agglomerates. Tectosilicate ZSM-5 zeolite having a .sup.29 Si NMR spectrum having at least three peaks indicates the presence of Si atoms in the structure having 0, 1 or 2 T-atoms as nearest neighbors.Type: GrantFiled: May 15, 1995Date of Patent: July 21, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Johannes Petrus Verduijn, Luc Roger Marc Martens, Johan Adriaan Martens
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Patent number: 5773381Abstract: Zeolite L containing caesium is prepared by a process in which said zeolite L is crystallised from a synthesis mixture with a molar composition (expressed as oxides) of:______________________________________ K.sub.2 O/SiO.sub.2 0.15 to 0.40 K.sub.2 O/Cs.sub.2 O 3 to 10 H.sub.2 O/K.sub.2 O 40 to 100 and SiO.sub.2 /Al.sub.2 O.sub.3 7 to 13 ______________________________________and containing 0.5 to 15 ppm (by weight) of divalent metal carbons, e.g. Mg ions. The zeolite L can form part of a dehydrocyclisation and/or isomerisation catalyst.Type: GrantFiled: June 2, 1995Date of Patent: June 30, 1998Assignee: Exxon Research & Engineering Co.Inventors: Johannes Petrus Verduijn, Pieter Ernst Gellings
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Patent number: 5756064Abstract: Zeolite crystals having an offretite structure have smaller crystals and/or can be produced using a synthesis mixture of lower alkalinity than could otherwise be used, if a divalent metal cation, such as magnesium, barium or cobalt is included in the synthesis mixture.Type: GrantFiled: June 2, 1995Date of Patent: May 26, 1998Assignee: Exxon Chemical Patents Inc.Inventor: Johannes Petrus Verduijn
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Patent number: 5723397Abstract: Molecular sieve layers on a support are deposited from a synthesis solution while increasing the solution temperature.Type: GrantFiled: February 12, 1996Date of Patent: March 3, 1998Assignee: Exxon Chemical Patents Inc.Inventor: Johannes Petrus Verduijn
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Patent number: 5672331Abstract: MFI zeolite crystals of uniform and controllable size may be produced by mixing:(i) a source of particulate silica in which silica particles present have an average diameter of 1 .mu.m or less;(ii) seeds of an MFI zeolite having an average diameter of 100 nm or less in the form of a colloidal suspension;(iii) an organic structure directing agent; and(iv) a source of fluorine or an alkali metal;to form an aqueous synthesis mixture, the seeds being present in an amount of 0.05 to 1700 ppm by weight of the synthesis mixture, and the synthesis mixture having an alkalinity in terms of OH.sup.- /SiO.sub.2 molar ratio of less than 0.1, and allowing the synthesis mixture to crystallize.Type: GrantFiled: June 3, 1994Date of Patent: September 30, 1997Assignee: Exxon Chemical Patents Inc. (ECPI)Inventor: Johannes Petrus Verduijn