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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Dessau; Ralph M.
Address:
Edison, NJ
No. of patents:
85
Patents:


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Patent Number Title Of Patent Date Issued
7399726 Process for direct oxidation of propylene to propylene oxide and large particle size titanium si July 15, 2008
Large crystals of titanium silicalite or intergrowths of intergrown smaller crystals, having a mean particle size greater than 2 .mu.m, have been found catalytically effective at commercially reasonable rates for the epoxidation of olefins in the presence of hydrogen peroxide. Crystals
6984606 Epoxidation catalyst January 10, 2006
Noble metal-containing titanium zeolite catalysts are prepared by reacting a titanium compound, a silicon source, a templating agent, and a noble metal source at a temperature and for a time sufficient to form a molecular sieve. The catalyst is useful in olefin epoxidation with oxygen
6960671 Process for direct oxidation of propylene to propylene oxide and large particle size titanium si November 1, 2005
Large crystals of titanium silicalite or intergrowths of intergrown smaller crystals, having a mean particle size greater than 2 .mu.m, have been found catalytically effective at commercially reasonable rates for the epoxidation of olefins in the presence of hydrogen peroxide. Crystals
6008388 Epoxidation process December 28, 1999
The selectivity of an olefin epoxidation catalyzed by a noble metal-modified titanium or vanadium zeolite is greatly enhanced by the addition of a nitrogen compound to the reaction mixture. The epoxidation utilizes hydrogen and oxygen in addition to the olefin.
6005123 Epoxidation process December 21, 1999
The selectivity of an olefin epoxidation catalized by a noble metal-modified titanium or vanadium zeolite is greatly enhanced by the addition of a phosphorus, sulfur, selenium or arsenic compound to the reaction mixture. The epoxidation utilizes hydrogen and oxygen in addition to the
5939597 Fluid bed process for para-xylene production August 17, 1999
Para-xylene is produced by toluene methylation by charging toluene and a methylating agent to a fluidized bed of catalyst at a rate sufficient to maintain the fluidized bed in a turbulent sub-transport flow regime, reacting the toluene with the methylating agent, and recovering para-
5675047 Method of preparation of ex situ selectivated zeolite catalysts for aromatic alkylation applicat October 7, 1997
The present invention is a method of producing an ex situ selectivated catalytic molecular sieve for shape selective aromatic alkylation in which a catalytic molecular sieve having a reduced activity is modified by being exposed to at least two selectivation sequences, each sequence incl
5574199 Para-selective aromatization process with ex situ selectivated zeolite catalyst November 12, 1996
A process for shape selective hydrocarbon aromatization that involves contacting a hydrocarbon feedstream, under aromatization conditions, with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves
5488194 Selective production of para-dialkyl substituted benzenes and catalyst therefor January 30, 1996
A process is provided for selective catalytic conversion of certain hydrocarbon feedstocks to product rich in para-dialkyl substituted benzenes. The catalyst required in the process comprises a crystalline material having the structure of PSH-3, MCM-22 or MCM-49, or a mixture of said
5362695 Inorganic molecular sieves encapsulating chelates November 8, 1994
A crystalline molecular sieve is synthesized as encapsulating chelating agents which are macrocyclic organic molecules containing from about 8 to about 18 members in cyclic configuration with at least one bicyclic bridge having from about 3 to about 10 members, the molecule members being
5316661 Processes for converting feedstock organic compounds May 31, 1994
A method for synthesizing a zeolite bonded to a substrate utilizes a reaction mixture having a H.sub.2 O/YO.sub.2 molar ratio of at least 25 and Y is a tetravalent element, particularly silicon.A structure made according to this method includes a film of interconnected zeolite crystals b
5304694 Isobutene and isoamylene production April 19, 1994
Catalytic conversion of a C.sub.2 -C.sub.5 alkane, e.g., isobutane and/or isopentane, to isoalkenes, e.g., isobutene and/or isopentene, respectively, is undertaken in the presence of an aromatic recycle stream which provides the heat of reaction for the conversion which is endothermi
5292980 Base-catalyzed reactions using zeolite catalysts March 8, 1994
Basic intermediate or large pore zeolites having a Constraint Index less than 12 are useful as catalysts in the dehydrogenation-aromatization of cyclic dienes, in the isomerization of olefins and in the aldol condensation, and particularly in the cyclization of acetonylacetone to 3-m
5292976 Process for the selective conversion of naphtha to aromatics and olefins March 8, 1994
A staged process has been discovered for the selective conversion of paraffins in naphtha to aromatics and conversion of naphthenes in naphtha to olefins. In a first stage, n-paraffins in naphtha are converted to aromatics over modified non acidic zeolite catalyst particles with a low
5284986 Upgrading of normal pentane to cyclopentene February 8, 1994
This invention is a process of converting n-pentane to cyclopentene. In accordance with a preferred embodiment n-pentane feed is converted in a dual temperature stage-dual catalyst process without interstage processing of the first-stage product mixture.
5284984 Gasoline upgrading by aromatics amination February 8, 1994
A method for upgrading an aromatics-containing charge composition boiling in the gasoline boiling range comprises i) contacting the charge composition with a nitrating agent under nitrating conditions to form a product comprising nitrated aromatics; ii) hydrogenating a feed containing
5283385 Upgrading of normal pentane to cyclopentane February 1, 1994
This invention is a process of converting n-pentane to cyclopentane. In accordance with a preferred embodiment of the invention, n-pentane feed is converted in dual temperature stage process without interstage processing of the first stage product mixture.
5254787 Dehydrogenation and dehydrocyclization using a non-acidic NU-87 catalyst October 19, 1993
A catalytic dehydrogenation and/or dehydrocyclization of paraffins. The aliphatic compound is contacted, under dehydrogenation conditions, with a Group VIA or Group VIII metal-containing non-acidic zeolite having the structure of NU-87 as the catalyst
5200375 Hydrogen regeneration of monofunctional dehydrogenation and aromatization catalysts April 6, 1993
The process is a hydrogen regeneration of spent Group VIII metal modified non-acidic microporous crystalline materials employed as catalysts in dehydrogenation and dehydrocyclization.
5192728 Tin-colating microporous crystalline materials and their use as dehydrogenation, dehydrocyclizat March 9, 1993
Group VIII metal modified non-acidic tin containing microporous crystalline materials which in catalysis exhibit high selectivity for dehydrogenation and dehydrocyclization are described.
5147837 Titania containing dehydrogenation catalysts September 15, 1992
The aging properties of Group VIII metal modified non-acidic microporous crystalline materials which in catalysis exhibit high selectivity for dehydrogenation and dehydrocyclization are improved by the incorporation therein of titanium and/or titania.
5124497 Production of mono-substituted alkylaromatics from C.sub.8 +N-paraffins June 23, 1992
A process for producing monosubstituted monoalkylaromatics from C.sub.8 +n-paraffins-containing feeds, by contacting the feeds with a non-acid catalyst comprising a microporous crystalline material containing tin, indium, thallium or lead, is disclosed.
5122489 Non-acidic dehydrogenation catalyst of enhanced stability June 16, 1992
A metal selected from the group consisting of ruthenium, iridium or rhenium on non-acidic microporous crystalline materials also containing a dehydrogenation/hydrogenation metal enhances the aging characteristics and stability of the base catalyst.
5108969 Low acidity catalyst for conversion of paraffins to olefins and/or aromatics April 28, 1992
A low acidity Group VIII metal-containing zeolite MCM-22 catalyst, said zeolite exhibiting an Alpha value of not greater than about 150, is provided for conversion of aliphatic C.sub.2 to C.sub.12 hydrocarbon(s) to olefin(s) and/or aromatic(s).
5103066 Dehydrogenation of alcohols over non-acidic metal-zeolite catalysts April 7, 1992
The invention relates to a catalytic dehydrogenation of alcohols to produce ketones and/or aldehydes. The catalyst comprises a dehydrogenation metal and a non-acidic microporous crystalline material as a support. The support may contain indium, tin, thallium or lead, when the dehydro
5091073 Crystalline molecular sieve compositions MCM-37 February 25, 1992
This invention relates to a novel synthetic crystalline molecular sieve composition, MCM-37, which may contain framework +3 valence element, e.g. aluminum, and +5 valence element, e.g. phosphorus or with an addition +4 valence element, e.g. silicon, and to use thereof as a support and in
5037529 Integrated low pressure aromatization process August 6, 1991
High purity benzene and high octane alkylaromatic gasoline can be obtained via a dual stage reforming process utilizing a non-acidic Group VIII metal containing microporous crystalline silicate catalyst in the first stage followed by first stage effluent treatment over acidic zeolite cat
5026919 Base-catalyzed reactions using zeolite catalysts June 25, 1991
Basic intermediate or large pore zeolites having a Constraint Index less than 12 are useful as catalysts in the dehydrogenation-aromatization of cyclie dienes, in the isomerization of olefins and in the aldol condensation, and particularly in the cyclization of acetonylacetone to 3-m
5019664 Process for the conversion of paraffins to olefins and/or aromatics and low acidity zeolite cata May 28, 1991
Aliphatic C.sub.2 to C.sub.12 hydrocarbon(s) are converted to olefin(s) and/or aromatic(s) in the presence of a low acidity Group VIII metal-containing zeolite MCM-22 catalyst, said zeolite exhibiting an Alpha value of not greater than about 150.
5013423 Reforming and dehydrocyclization May 7, 1991
Improved, dehydrocyclization and low-pressure reforming processes based on a non-acidic metal containing crystalline microporous indium catalyst, in which the feed is rich in C.sub.6 -C.sub.7 low octane hydrocarbons, such as paraffins, and in which the reformate has increased aromatic co
5011805 Dehydrogenation, dehydrocyclization and reforming catalyst April 30, 1991
The invention relates to catalytic treatment of paraffin feeds to alter the hydrogen content of the feed, for example, by producing effluents the aromatic content of which exceeds that of the feed in which the catalyst is a non-acidic composition containing a strong dehydrogenation/h
4990710 Tin-containing microporous crystalline materials and their use as dehydrogenation, dehydrocycliz February 5, 1991
Group VIII metal modified non-acidic tin containing microporous crystalline materials which in catalysis exhibit high selectively for dehydrogenation and dehydrocyclization are described.
4982028 Dehydrogenation and dehydrocyclization catalyst January 1, 1991
Non-acid microporous crystalline indium containing materials are combined with Group VIII metal such as platinum to produce catalysts which exhibit high selectivity for dehydrocyclization of C.sub.5.sup.+ paraffins and which exhibit little, if any, cracking activity for hexane and hepta
4962250 Process for the conversion of paraffins to olefins and/or aromatics and non-acidic zeolite catal October 9, 1990
Aliphatic C.sub.2 to C.sub.12 hydrocarbon(s) are converted to olefin(s) and/or aromatic(s) in the presence of an essentially non-acidic Group VIII metal species-containing zeolite MCM-22 catalyst.
4935566 Dehydrocyclization and reforming process June 19, 1990
An improved, low-pressure dehydrocyclization and/or reforming process based on a non-acidic metal containing crystalline microporous tin catalyst, in which the feed is rich in low octane hydrocarbons, such as paraffins, and in which the product has increased aromatic content and increase
4931416 Thallium or lead-containing microporous crystalline materials and their use as dehydrogenation d June 5, 1990
Crystalline microporous thallium or lead containing silicate isostructural with zeolites, as catalysts, exhibit high selectivity for dehydrogenation, dehydrocyclization, and reforming.
4929792 Dehydrogenation, dehydrocyclization and reforming catalyst May 29, 1990
The invention relates to catalytic treatment of paraffin feeds to alter the hydrogen content of the feed, for example, by producing effluents the aromatic content of which exceeds that of the feed in which the catalyst is a non-acidic composition containing a strong dehydrogenation/h
4922050 Catalytic dehydrogenation of hydrocarbons over indium-containing crystalline microporous materia May 1, 1990
A catalytic dehydrogenation to produce the unsaturated analogs of aliphatic compounds with high process selectivity for the unsaturated analog production. The catalytic dehydrogenation comprises contacting the aliphatic compound, under dehydrogenation conditions, with a catalyst comp
4910357 Alkylate upgrading March 20, 1990
A process selective for converting dimethylhexanes to aromatic analogs is described. Application of the exhibited selectivity of the process allows upgrading alkylate dimethylhexane(s) of low RON to produce higher RON analogs without affecting changes in other components of the alkylate.
4892645 Dewaxing catalyst based on tin containing materials January 9, 1990
Catalytic dewaxing of wax containing hydrocarbon feedstocks is undertaken in the presence of a catalyst composition comprising a dehydrogenation metal in combination with a non-acidic microporous crystalline material containing tin to maximize liquid yield.
4886926 Catalytic dehydrogenation of hydrocarbons over tin-containing crystalline microporous materials December 12, 1989
A catalytic dehydrogenation to produce the unsaturated analogs of aliphatic compounds with high process selectivity for the unsaturated analog production. The catalytic dehydrogenation comprises contacting the aliphatic compound, under dehydrogenation conditions, with a catalyst comp
4884531 Operation of an internal combustion engine with a pre-engine reformer December 5, 1989
A method is provided of operating an internal combustion engine comprising subjecting a hydrocarbon fuel of relatively low octane number to in situ reforming at elevated temperatures by passing it through a reaction zone containing a substantially non-acid catalyst comprising a Group VII
4882040 Reforming process November 21, 1989
An improved, low-pressure reforming process based on non-acidic metal containing crystalline microporous catalyst, in which the feed is a naptha rich in C.sub.6 -C.sub.7 low octane hydrocarbons, such as paraffins, and in which the reformate has increased aromatic content and increased oc
4876228 Zeolite modifications October 24, 1989
A method is disclosed for modifying an aluminosilicate-containing inorganic solid having a predetermined ion exchange capacity and containing an extractable silica by contacting, in the absence of added organic nitrogen or organic phosphorous compound and added activating metal oxide, th
4868145 Dehydrogenation and dehydrocyclization catalyst September 19, 1989
Non-acid microporous crystalline indium containing materials are combined with Group VIII metal such as platinum to produce catalysts which exhibit high selectivity for dehydrocyclization of C.sub.5.sup.+ paraffins and which exhibit little, if any, cracking activity for hexane and hepta
4867864 Dehydrogenation, dehydrocyclization and reforming catalyst September 19, 1989
The invention relates to catalytic treatment of paraffin feeds to alter the hydrogen content of the feed, for example, by producing effluents the aromatic content of which exceeds that of the feed in which the catalyst is a non-acidic composition containing a strong dehydrogenation/h
4851599 Styrene production July 25, 1989
Catalysis of the reaction to produce styrene from n-octane in the presence of catalysts comprising a dehydrogenation metal and a microporous crystalline material containing a modifier selected from the group consisting of tin, lead and thallium, is described.
4849567 Catalytic dehydrogenation of hydrocarbons over indium-containing crystalline microporous materia July 18, 1989
A catalytic dehydrogenation to produce the unsaturated analogs of aliphatic compounds with high process selectivity for the unsaturated analog production. The catalytic dehydrogenation comprises contacting the aliphatic compound, under dehydrogenation conditions, with a catalyst comp
4830729 Dewaxing over crystalline indium silicates containing groups VIII means May 16, 1989
Catalytic dewaxing of wax containing hydrocarbon feedstocks is undertaken in the presence of a catalyst composition comprising a dehydrogenation metal in combination with a non-acidic microporous crystalline material to maximize liquid yield.
4822942 Styrene production April 18, 1989
An indium containing crystalline microporous material also containing a dehydrogenation component exhibits high selectivity for the aromatization of a normal paraffin to styrene, under dehydrocyclization conditions.Group VIII metal-containing non-acidic crystalline microporous indium con
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