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7518025 Process for producing alkyl aromatic compound  
A process is provided for producing an alkyl aromatic compound having substituents at the 3- and 5-positions by alkylating an aromatic compound having two substituents in the meta positions with an...
7439412 Process for producing para-xylene  
A process for producing a PX-rich product comprises (a) separating a feedstock containing C 8 hydrocarbons to produce a C 8 hydrocarbons rich stream; (b) separating at least a first portion of...
7387978 Selective para-xylene production via methylation of toluene with methanol in the presence of modified HZSM-5 catalyst  
We disclose a method for converting toluene to xylenes, comprising contacting toluene with methanol in the presence of a silica-bound HZSM-5 catalyst. As an example, in one embodiment the method...
7371914 Xylene isomerization with an added benzene  
Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed.
7371912 Process for making xylene isomer using a deheptanizer with a side draw recycle  
In processes for recovering one or more xylene isomers and isomerizing the remaining isomers for recycle, the isomerate is distilled to provide a toluene-containing overhead, a mid-boiling fraction...
7335295 Coated zeolite catalysts and use for hydrocarbon conversion  
There is provided a coated zeolite catalyst in which the accessibility of the acid sites on the external surfaces of the zeolite is controlled and a process for converting hydrocarbons utilizing...
7326819 High-activity isomerization catalyst and process  
A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated...
7314601 Processes for producing xylenes using isomerization and transalkylation reactions and apparatus therefor  
Processes for making xylene isomer use integrated transalkylation and isomerization reaction zones to enhance xylene recovery and enable reduction in capital costs and energy consumption.
7304193 Integrated process for aromatics production  
An aromatics complex flow scheme has been developed. The isomerized xylenes effluent from a xylene recovery zone is recycled to a transalkylation stripper without requiring C 8 aromatic...
7271305 Method of obtaining para-xylene  
Disclosed herein is an improved method for making and obtaining para-xylene from a mixture of xylene isomers, and various embodiments of the method. The method generally includes contacting a...
7270792 Process for producing para-xylene  
A process and a system for increasing para-xylene production from a C 8 aromatic feedstream by coupling at least one xylene isomerization reactor with at least one pressure swing adsorption unit...
7151199 Hydrocarbon conversion processes using non-zeolitic molecular sieve catalysts  
Hydrocarbon or oxygenate conversion process in which a feedstock is contacted with a non zeolitic molecular sieve which has been treated to remove most, if not all, of the halogen contained in the...
7026268 Solid acid catalyst containing platinum group metal component and method for preparation thereof  
The present invention provides a concentration distribution for a platinum group metal component in a catalyst with which catalyst activity can be increased, and to provide a method for supporting...
7015175 High-activity isomerization catalyst and process  
A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated...
6924405 Xylene isomerization  
A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization...
6890423 Distillate fuel blends from Fischer Tropsch products with improved seal swell properties  
The invention provides distillate fuel blend components with improved seal swell and lubricity properties obtained from Fischer Tropsch products. The blends contain a highly paraffinic distillate...
6858769 Lithium aluminate layered catalyst and a selective oxidation process using the catalyst  
A catalyst for the selective oxidation of hydrogen has been developed. It comprises an inert core such as cordierite and an outer layer comprising a lithium aluminate support. The support has...
6822130 Isomerization catalyst with a specific pore size distribution  
A catalyst composition comprising an alumina carrier, a Group VIII noble metal, and a halogen compound wherein the catalyst composition has total pore volume of more than 0.48 ml/g and wherein at...
6797849 Xylene isomerization  
A process for isomerizing xylenes in a feed containing xylenes is disclosed which process comprises: contacting the feed with a first isomerization catalyst in a first reactor under a first set of...
6709570 Method for preparing a catalyst  
A method for preparing a catalyst comprising a zeolite and a low acidity refractory oxide binder which is essentially free of alumina which method comprises: (a) preparing an extrudable mass...
6573418 Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption  
A pressure swing adsorption process to separate para-xylene and ethylbenzene from C 8 aromatics which uses a para-selective, non-acidic, medium pore molecular sieve of the MFI structure type and...
6528695 Process for the production of an isomer of xylenes in three stages: separation, isomerization in the presence of a catalyst based on an EUO zeolite and transalkylation  
The invention relates to a process for the production of at least one isomer of xylenes, preferably paraxylene, as well as benzene, starting from a C8-aromatic fraction, whereby said process...
6518472 Stabilized dual bed xylene isomerization catalyst system  
A catalyst system suitable for the isomerization of a xylene and conversion of ethylbenzene in a feed containing xylene and ethylbenzene comprising a first catalyst having activity for the...
6512155 Process for the activation of an alkylaromatic isomerization catalyst by water  
An improved process is disclosed for ethylbenzene and xylene isomerization in a non-equilibrium mixture of xylenes and ethylbenzene. By addition of trace quantities of water to the reaction zone,...
6512154 Production of a xylene isomer in three stages: separation, isomerization with a catalyst with an EUO zeolite base and transalkylation with recycling of C10-aromatic compounds  
A process for the production of at least one xylene isomer, paraxylene, metaxylene or orthoxylene from an aromatic feedstock that has 7 to 10 carbon atoms per molecule. The process comprises a...
6433236 Acid catalyzed isomerization of substituted diaryls  
A substituted diaryl compound or a mixture of substituted diaryl compounds, such as dimethylbiaryl compounds are isomerized by treatment with a strong acid or mixtures of strong acids in the...
6376733 Process for production of paraxylene  
This invention relates to a process and a chemical plant for the production primarily of paraxylene. In particular the process and chemical plant utilise zeolite membranes for enhanced paraxylene...
6350929 Process for isomerizing and dehydrogenating using a catalyst activated by sulfurization and passivation with ammonia or precursor thereof  
Process for isomerization of a feedstock that contains aromatic compounds with eight carbon atoms characterized in that it comprises at least one isomerization stage a) that is carried out in the...
6342649 Method for removing ethylbenzene from a para-xylene feed stream  
The method for removing ethylbenzene from a feed stream for use in producing para-xylene product, the stream containing para-xylene, ortho-xylene, meta-xylene and ethylbenzene. The method...
6337427 Process for isomerizing aromatic cuts containing eight carbon atoms using a catalyst containing a zeolite with an EUO type structure  
A process for isomerising aromatic compounds containing eight carbon atoms is described in which the catalyst used contains at least one zeolite with structure type EUO and a group VIII element. In...
6271429 Process for isomerizing and dehydrogenating aromatic compounds containing eight carbon atoms with different catalysts  
A process for isomerising a feed comprising aromatic compounds containing 8 carbon atoms is carried out in two steps: an isomerisation step and a dehydrogenation step. In FIG. 1, the feed to be...
6198014 Process for isomerizing aromatic compounds containing eight carbon atoms comprising a recycle  
For isomerising aromatic compounds containing eight carbon atoms in the presence of hydrogen, a mixture containing compounds with a boiling point of about 80° C. to 135° C. comprising at least...
6147269 Isomerization with an EUO-type catalyst of aromatic compounds with eight carbon atoms followed by a dehydrogenation stage  
A C 8 aromatic feedstock is isomerized by an isomerization stage conducted at 320-380° C. with a catalyst containing at least one EUO-structure-type zeolite and at least one metal of group VIII,...
5977420 Dual-loop xylene isomerization process  
A method for increasing the efficiency of xylene isomerization by using a two stage isomerization process. In the first stage of the process, a C 9 + aromatics feedstock is subjected to...
5954948 Hydrocarbon conversion process using a sulfur tolerant catalyst  
Hydrocarbon conversion processes are described which use a sulfur tolerant catalyst system. The catalyst is tolerant to large amounts (about 30,000 ppm sulfur) in the feedstream and comprises a...
5948949 Process for producing 2,6-dimethylnaphthalene  
A process for producing highly pure 2,6-dimethylnaphthalene in a high yield from a mixture of dimethylnaphthalene isomers in the presence of a solvent, such as an aliphatic or alicyclic saturated...
5942104 Alumina source for non-zeolitic molecular sieves  
This invention provides a method for preparing non-zeolitic molecular sieves using inexpensive reagents and at lower manufacturing cost. The method includes using a low density, small size...
5898090 Aromatic isomerization using a modified silicoaluminophosphate  
This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a silicoaluminophosphate molecular sieve which is enriched in framework silicon at...
5569805 Catalytic conversion of aromatic compounds  
A process is provided for catalytic conversion of feedstock comprising aromatic compounds to product comprising aromatic compounds which differs from said feedstock. The catalyst required in the...
5516955 Catalytic distillation to produce orthoxylene and paraxylene  
An improvement to a known process in which C 8 aromatic hydrocarbons are treated to recover a desired isomer of xylene, and in particular o-xylene or p-xylene. A step in recovering isomers of...
5495059 Multiple impregnation technique for the preparation of ex situ selectivated zeolite catalysts  
A ex situ selectivated catalytic molecular sieve for enhanced shape selective hydrocarbon conversions in which a catalytic molecular sieve is modified by being exposed to at least two selectivation...
5475162 Acid functionalized organically-bridged polysilsesquioxanes as catalysts for acid catalyzed reactions  
A process of effecting an acid catalyzed reaction wherein a reactant capable of undergoing an acid catalyzed reaction is contacted with an acid functionalized organically-bridged polysilsesquioxane...
5468370 Preparation of a catalyst from metal oxides by reduction and partial carburization by reaction gases  
A catalyst for chemical and petrochemical reactions and a process for its production. The catalyst comprises an oxide of one of the transition metals, rare earth elements, or actinide elements,...
5401892 Preparation of a dimethyltetralin by cyclizing an orthotolylpentene phenylhexene using an ultra-stable crystalline aluminosilicate molecular sieve y-zeolite  
A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific...
5371309 Vacancy titanates intercalated with cationic hydroxy aluminum complexes  
There is provided a vacancy titanate intercalated with a cationic hydroxy aluminum complex, such as a Keggin ion. A method for making this material and a process for using this material as a...
5365003 Shape selective conversion of hydrocarbons over extrusion-modified molecular sieve  
A process for a shape selective hydrocarbon conversion such as toluene disproportionation, involves contacting a reaction stream under conversion conditions with a catalytic molecular sieve which...
5321184 Pretreatment method for C.sub.8 aromatic isomerization process  
A pretreatment method for a C 8 aromatic isomerization process wherein the isomerization catalyst is initially contacted with a C 8 aromatic feedstock under high severity isomerization conditions...
5254769 Method of isomerization of dimethylnaphthalenes  
Dimethylnaphthalenes are isomerized into 2,6-dimethylnaphthalene by utilizing hydrogen fluoride as a catalyst and straight chain saturated aliphatic hydrocarbons having carbon atoms in the range...
5254768 Process for producing 3,3',4,4'-tetramethyldiphenylmethane  
There is provided a process for producing 3,3',4,4'-tetramethyldiphenylmethane which comprises subjecting tetramethyldiphenylmethane containing at least one of 2,3,3',4'-tetramethyldiphenylmethane...
5177283 Hydrocarbon conversion process  
Alkylaromatic hydrocarbons are produced in a process which comprises concentrating a feed aromatic hydrocarbon into a sidecut stream removed from a fractionation column. A feed acyclic olefin is...
Matches 1 - 50 out of 157 1 2 3 4 >