| Patent Number |
Title Of Patent |
Date Issued |
| 6559253 |
High temperature olefin polymerization process |
May 6, 2003 |
| The invention is directed to olefin polymerization processes using bridged hafnocene catalyst complexes comprising highly substituted noncoordinating anions that are surprisingly stable under high temperature olefin polymerization processes such that olefin copolymers having significant |
| 6559248 |
Process of removing contaminants from an olefin stream using extractive distillation |
May 6, 2003 |
| Disclosed is a method of purifying olefin containing oxygenate contaminants. The method incorporates the use of extractive distillation. Under the appropriate conditions, olefins containing very low levels of oxygenate contaminants can be recovered. |
| 6558531 |
Method for maintaining heat balance in a fluidized bed catalytic cracking unit |
May 6, 2003 |
| The invention relates to a process for maintaining heat balance in a fluidized bed catalytic cracking unit. More specifically, the invention relates to a combustion control method capable of maintaining or restoring heat balance by conducting, under appropriate conditions, fuel and an |
| 6555635 |
Preparation of vinyl-containing macromers |
April 29, 2003 |
| Polymeric compositions of matter are described comprising olefin polymer chains having M.sub.n of about 400 to 75,000, a ratio of vinyl groups to total olefin groups according to the formula ##EQU1##where, a=-0.24 and b=0.8, and where the total number of vinyl groups per 1000 carbon |
| 6552240 |
Method for converting oxygenates to olefins |
April 22, 2003 |
| The present invention provides a method for converting a feed containing oxygenates to olefins and comprises the following steps: providing a feed including an oxygenate; contacting the feed in a reactor apparatus with a catalyst including a molecular sieve, the contacting taking place u |
| 6552108 |
Rubber blends having improved stability and green strength |
April 22, 2003 |
| The present invention relates generally to rubber compositions having improved green strength and thermal stability. These compositions comprise blends of a first rubber component, an isoolefin/para-alkylstyrene copolymer component, and an amine component reacted in situ prior to cur |
| 6548709 |
Method for the production of arylsulfides and compositions made therefrom |
April 15, 2003 |
| The present invention relates to methods for production of arylsulfides wherein an aromatic compound is reacted with elemental sulfur in the presence of solid acid catalyst. The solid acid catalyst can be a zeolite. The methods are useful for producing alkylated diphenylsulfides from |
| 6545101 |
Star-branched polymer with dendrimer core |
April 8, 2003 |
| Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alka |
| 6541415 |
Synthesis of molecular sieve catalysts |
April 1, 2003 |
| Disclosed is a molecular sieve catalyst which contains molecular sieve-containing attrition particles and virgin molecular sieve, the attrition particles having been recycled from a catalyst manufacture process or from a reaction system. The catalyst can be used in a variety of catal |
| 6541410 |
Siloxy substituted cocatalyst activators for olefin polymerization |
April 1, 2003 |
| This description addresses ionic compositions of matter comprising positively charged cations [Ct].sup.+ and negatively charged anions [A].sup.-, said anion comprising a central core Group 13 element to which are bound fluoroaryl ligands, at least one of said fluoroaryl ligands being |
| 6540970 |
Method for the synthesis of molecular sieves |
April 1, 2003 |
| The present invention provides a method for the synthesis of MeAPO molecular sieves which includes the following steps: providing a source of alumina, a source of phosphorus, water, and a template suitable for forming a MeAPO molecular sieve; providing a source of metal (Me) includin |
| 6538167 |
Process for producing light olefins |
March 25, 2003 |
| There is provided a process for converting methanol and/or dimethyl ether to a product containing C.sub.2 to C.sub.4 olefins which comprises the step of contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a porous crystalline material. The contactin |
| 6538162 |
Method for converting alkanes to oxygenates |
March 25, 2003 |
| The invention discloses a method for converting alkane to oxygenate which comprises the following steps: (i) contacting an alkane-containing gas with non-metal, regenerable, electrophile ions in a concentrated sulfuric acid medium under conditions sufficient to provide electrophilicly |
| 6537941 |
Rejuvenating SAPO molecular sieve by freeze drying |
March 25, 2003 |
| The method includes freeze drying a molecular sieve having a methanol conversion ratio of less than 1, or a catalyst containing molecular sieve and a binder having a methanol conversion ratio of less than 1. The rejuvenated molecular sieve or catalyst is used to make an olefin product |
| 6531639 |
Catalytic production of olefins at high methanol partial pressures |
March 11, 2003 |
| Disclosed is a catalytic method for operating an oxygenate to olefins conversion reaction to provide a substantial quantity of prime olefin in the product. The product is provided by operating within desired parameters of weight hourly space velocity and oxygenate partial pressure. O |
| 6528670 |
Bridged metallocenes for olefin copolymerization |
March 4, 2003 |
| The invention is directed to bridged metallocene catalyst complexes that are sufficiently soluble in aliphatic solvents to be particularly suitable for solution olefin polymerization processes such that olefin copolymers can be prepared with high molecular weights and catalyst activities |
| 6528589 |
Compatibilized polymer blends formed using a multifunctional agent |
March 4, 2003 |
| A process for forming a compatibilized blend of general purpose rubbers (GPR) and a halogenated poly(isobutylene-co-4-methylstyrene) through solventless reactions utilizing a multifunctional agent containing a diene reactive group and a benzylic halo reactive group. |
| 6524988 |
Highly active supported catalyst compositions |
February 25, 2003 |
| This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral .alpha.-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided usi |
| 6523351 |
Method for utilizing gas reserves with low methane concentrations and high inert gas concentrati |
February 25, 2003 |
| A method of fueling a gas turbine with methane gas originating from low-methane (40%-80%) natural gas comprising the following steps: 1) blending inert gas and a natural gas stream, 2) removing at least one acid from the blend, 3) hydrating the blend, 4) converting part of the methane |
| 6521563 |
Silicoaluminophosphates having an ael structure, a method for their preparation and their use as |
February 18, 2003 |
| Disclosed are silicoaluminates (SAPOs) having unique silicon distributions, a method for their preparation and their use as naphtha cracking catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution. |
| 6521562 |
Preparation of molecular sieve catalysts micro-filtration |
February 18, 2003 |
| A method of making a molecular sieve catalyst by preparing a catalyst slurry containing molecular sieve, binder and a matrix material and directing the slurry to a forming unit. The catalyst slurry is prepared by using a microfiltration process whereby the molecular sieve is washed and |
| 6518475 |
Process for making ethylene and propylene |
February 11, 2003 |
| A process for increasing the ethylene selectivity of a silicoaluminophosphate molecular sieve catalyst by using acetone in an oxygenate conversion process. Acetone can be added with the oxygenate feed at a concentration from about 1% to about 15% by weight, preferably about 1% to abo |
| 6518471 |
Selective production of meta-diisopropylbenzene |
February 11, 2003 |
| In a process for the selective production of meta-diisopropylbenzene, a C.sub.9 +aromatic hydrocarbon feedstock containing meta- and ortho-diisopropylbenzene is contacted with benzene under conversion conditions with a catalyst comprising a molecular sieve selected from the group con |
| 6518215 |
Polymerization catalysts, their production and use |
February 11, 2003 |
| The invention generally relates to a catalyst, particularly a metallocene catalyst and catalyst system useful in the polymerization of olefins into a polymer product. The polymer product has a broad molecular weight distribution, a high molecular weight and a narrow composition distr |
| 6517807 |
Preparation of high silica zeolites bound by zeolite and use thereof |
February 11, 2003 |
| This invention relates to a process for producing zeolite-bound high silica zeolites and the use of the zeolite-bound high silica zeolite produced by the process for hydrocarbon conversion. The process is carried out by forming an extrudable paste comprising a mixture of high silica zeol |
| 6512019 |
Polypropylene copolymer foams and their use |
January 28, 2003 |
| This invention relates generally to foamable crystalline propylene polymers obtained from metallocene catalysis and to their methods of production. The foamed crystalline propylene polymers have molecular weight distributions and densities that fall within broad ranges. The crystalline |
| 6509290 |
Catalyst composition including attrition particles and method for making same |
January 21, 2003 |
| Disclosed is a molecular sieve catalyst which contains molecular sieve-containing attrition particles and virgin molecular sieve, the attrition particles having been recycled from a catalyst manufacture process or from a reaction system. The catalyst can be used in a variety of catal |
| 6506954 |
Process for producing chemicals from oxygenate |
January 14, 2003 |
| There is provided a process for converting methanol and/or dimethyl ether to a product containing olefin, e.g., C.sub.2 to C.sub.4 olefins, C.sub.9+ aromatics and non-C.sub.9+ aromatics which comprises: 1) contacting a feed which contains methanol and/or dimethyl ether with a catalyst |
| 6506857 |
Bridged metallocenes for olefin copolymerization |
January 14, 2003 |
| The invention is directed to bridged metallocene catalyst complexes that are sufficiently soluble in aliphatic solvents to be particularly suitable for solution olefin polymerization processes such that olefin copolymers can be prepared with high molecular weights and catalyst activities |
| 6506812 |
Method of producing rigid foams and products produced therefrom |
January 14, 2003 |
| A thermosetting plastic foam solid formed from the reaction product of: (a) either polyisocyanate or isocyanate-based foam; (b) a polyol-based foam; (c) a catalyst which is capable of promoting the thermosetting reaction between the polyisocyanate or isocyanate-based foam and the polyol- |
| 6506703 |
Method for depositing catalyst metals into zeolite to produce hydrocarbon processing catalyst |
January 14, 2003 |
| An ion exchange method is provided for loading and uniformly distributing noble metals into a catalyst substrate comprising a zeolite to make a monofunctional, non-acidic reforming catalyst. The catalyst substrate is contacted with an aqueous loading solution comprising noble metal catio |
| 6506243 |
Environmentally preferred fluids and fluid blends |
January 14, 2003 |
| The invention concerns fluids that have a low reactivity with respect to ozone formation, blends thereof, and the replacement of conventional industrial solvents with said fluid or fluid blends in order to reduce tropospheric ozone formation. |
| 6504074 |
Toluene disproportionation using coated zeolite catalyst |
January 7, 2003 |
| 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 the coated zeolite catalyst. The zeolite catalyst comprises core crystals of a first zeolite |
| 6503863 |
Heat treating a molecular sieve and catalyst |
January 7, 2003 |
| Disclosed is a method of heat treating a molecular sieve. The method comprises providing a template-containing molecular sieve, heating the molecular sieve under conditions effective to remove a portion of the template from the molecular sieve, and cooling the heated molecular sieve |
| 6503637 |
Heat sealable films |
January 7, 2003 |
| A film comprising a blend of: i) a homopolymer of ethylene having a Mw/Mn of 3 or a copolymer of ethylene and up to 50% weight % of a C.sub.3 to C.sub.20 olefm, the copolymer having a CBDI of 50% or more; ii) a homopolymer of propylene or a copolymer of propylene and up to 50 weigh |
| 6500563 |
Elastic films including crystalline polymer and crystallizable polymers of propylene |
December 31, 2002 |
| Improved thermoplastic polymer elastic film blend compositions including a crystalline isotactic polypropylene component and a crystallizable alpha-olefin and propylene copolymer component, the copolymer having crystallizable alpha-olefin sequences. In a preferred embodiment, improved |
| 6498120 |
Rejuvenating SAPO molecular sieve with anhydrous liquid or vapor |
December 24, 2002 |
| This invention is to a method of rejuvenating a molecular sieve. The method includes contacting a molecular sieve having a methanol uptake index of less than 1, or a catalyst containing molecular sieve having a methanol uptake index of less than 1, with anhydrous liquid or vapor until th |
| 6495609 |
Carbon dioxide recovery in an ethylene to ethylene oxide production process |
December 17, 2002 |
| Disclosed is a method for recovering carbon dioxide from an ethylene oxide production process and using the recovered carbon dioxide as a carbon source for methanol synthesis. More specifically, carbon dioxide recovered from an ethylene oxide production process is used to produce a synga |
| 6492473 |
Mixed transition metal catalyst systems for olefin polymerization |
December 10, 2002 |
| The invention encompasses a mixed transition metal olefin polymerization catalyst system suitable for the polymerization of olefin monomers comprising one late transition metal catalyst system and at least one different catalyst system selected from the group consisting of late trans |
| 6492465 |
Propylene impact copolymers |
December 10, 2002 |
| This invention relates to propylene impact copolymer compositions. In particular, these unique and improved compositions can be produced using conventional, commercial-scale processes. |
| 6489480 |
Group-15 cationic compounds for olefin polymerization catalysts |
December 3, 2002 |
| This description addresses fluorinated amine compounds meeting the general formula R'.sub.i ArF--ER.sub.2, where ArF is a fluoroaryl group, E is nitrogen or phosphorous, each R is independently a C.sub.1 -C.sub.20 hydrocarbyl group; or the two Rs may connect to form an unsubstituted or |
| 6489413 |
Olefin polymerization process with alkyl-substituted metallocenes |
December 3, 2002 |
| The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one .pi.-bonded ring having a C.sub.3 or greater hydrocarbyl, hydrocarbylsilyl |
| 6486278 |
Ethylene copolymerization process |
November 26, 2002 |
| This invention is a solution process for the preparation of ethylene-.alpha.-olefin-diolefin copolymers comprising contacting ethylene, one or more .alpha.-olefin monomer, and one or more cyclic diene monomer, with a catalyst composition comprising a bridged, bis(cyclopentadienyl) zi |
| 6486219 |
Methanol, olefin, and hydrocarbon synthesis process |
November 26, 2002 |
| An improved method for the production of methanol and hydrocarbons from a methane-containing gas, such as natural gas. The improved method integrates a hydrocarbon synthesis unit with a methanol synthesis unit. The invention combines a syngas stream from a steam reformer, a syngas st |
| 6486088 |
High activity carbenium-activated polymerization catalysts |
November 26, 2002 |
| This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalsyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry-phase polymerizati |
| 6482999 |
Method for improving light olefin selectivity in an oxygenate conversion reaction |
November 19, 2002 |
| A method for converting oxygenates to light olefins. The method comprises contacting, in a reactor, a feedstock comprising oxygenates with a molecular sieve catalyst under conditions effective to convert the feedstock to a product including light olefins and by-products, the contacti |
| 6482998 |
Process for converting oxygenates to olefins with direct product quenching for heat recovery |
November 19, 2002 |
| The present invention relates to a process for catalytically converting a feedstock comprising an oxygenate to olefins utilizing a heat exchange device to transfer heat from at least a portion of an effluent of an oxygenate conversion reactor to the feedstock to cause at least a portion |
| 6479598 |
Petroleum resins and their production with BF3 catalyst |
November 12, 2002 |
| Petroleum resins are produced using a supported BF.sub.3 cocatalyst complex. Preferably the cocatalyst is organic such as an alcohol or a carboxylic acid. Use of the catalyst in supported form together with the cocatalyst enables control over both Bronsted and Lewis acidity leading to |
| 6479597 |
Raman analysis system for olefin polymerization control |
November 12, 2002 |
| Method of olefin polymerization in a reactor, such as a slurry loop olefin polymerization reactor, is provided. The method includes conducting in-situ, real time spectroscopic analysis of one or more reactor constituents. The reactor constituents analyzed may be present in the reacto |
| 6476173 |
Propylene homopolymers and methods of making the same |
November 5, 2002 |
| This invention relates to isotactic propylene homopolymer compositions obtained from metallocene catalysis wherein the polymer has a molecular weight distribution (Mw/Mn) in the range of from about 2.5 to about 20.0. The isototic propylene homopolymer composition may be prepared in a |
