| Patent Number |
Title Of Patent |
Date Issued |
| 6755963 |
Hydrogenation process for hydrocarbon resins |
June 29, 2004 |
| This invention provides a process for hydrotreating hydrocarbon resins, which process comprises contacting a feedstock comprising a hydrocarbon resin or rosin, under suitable hydrotreating conditions, with a bulk multimetallic catalyst comprised of at least one Group VIII non-noble m |
| 6753453 |
Production of meta-diisopropylbenzene |
June 22, 2004 |
| A process for the selective production of meta-diisopropylbenzene is disclosed, wherein the process comprises the steps of contacting cumene under disproportionation conditions and in the absence of added benzene with a catalyst comprising a porous crystalline inorganic oxide material |
| 6753452 |
Removal of polar contaminants from aromatic feedstocks |
June 22, 2004 |
| A process is described for removing polar compounds from an aromatic feedstock which contains polar compounds. The process comprises contacting the feedstock in an adsorption zone at a temperature of less than or equal to 130.degree. C. with an adsorbent selective for the adsorption of s |
| 6750307 |
Propylene polymers incorporating polyethylene macromers |
June 15, 2004 |
| A polyolefin product is provided which comprises a branched olefin copolymer having an isotactic polypropylene backbone, polyethylene branches and, optionally, one or more comonomers. The total comonomer content of the branched olefin copolymer is from 0 to 20 mole percent. Also, the |
| 6750306 |
Hyperbranched polymers by coordination polymerization |
June 15, 2004 |
| Hyperbranched copolymers comprising at least one C2-C20 .alpha.-monoolefin monomers and 0.2 to 20 mole % of at least one .alpha., .omega.-non-conjugated diene monomers having 5 to 18 carbon atoms are prepared by coordination (metallocene) copolymerization of the monomers and quenchin |
| 6750284 |
Thermoplastic filled membranes of propylene copolymers |
June 15, 2004 |
| The invention relates to a thermoplastic membrane (e.g. film, fluid barrier, and the like) which is formed from a blend of: a) a first polymer component (FPC), wherein said FPC comprises a propylene-ethylene copolymer containing from 80 to 93 percent by weight of units derived from pr |
| 6747182 |
Production of alkylated aromatic compounds using dealuminated catalysts |
June 8, 2004 |
| A process for preparing alkyl substituted aromatic compounds by alkylating an aromatic compound with an alkylating agent in the presence of a porous crystalline zeolite in which the zeolite has been selectively deluminated to remove nonframework aluminum. |
| 6747114 |
Polypropylene-based adhesive compositions |
June 8, 2004 |
| An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one C.sub.4 to C.sub.20 .alpha.-olefin, the copolymer having a weight average molecular weight (Mw) from ab |
| 6743747 |
Catalyst pretreatment in an oxgenate to olefins reaction system |
June 1, 2004 |
| Disclosed is a crystalline silicoaluminophosphate molecular sieve comprising a porous framework structure and at least one single ring aromatic compound within the porous framework structure. The silicoaluminophosphate molecular sieve is used to convert oxygenate feedstock to olefin |
| 6740791 |
Process for converting oxygenates to olefins with direct product quenching for heat recovery |
May 25, 2004 |
| The present invention relates to a process for converting an oxygenate in a feedstock to olefins in an olefin-containing effluent. Heat is transferred from effluent to the feedstock. The effluent is then quenched to form a light product fraction and a heavy product fraction. The heavy pr |
| 6740790 |
Making an olefin product from an oxygenate |
May 25, 2004 |
| Disclosed is a method for making olefin product from an oxygenate-containing feedstock. In the method, a silicoaluminophosphate molecular sieve catalyst is contacted with the oxygenate-containing feedstock in a reactor at an average catalyst feedstock exposure index of at least 1.0. |
| 6740228 |
Process for reforming petroleum hydrocarbon stocks |
May 25, 2004 |
| Processes for reforming, and in particular aromatising, hydrocarbons from a petroleum source may be carried out by contacting the hydrocarbons with a catalyst of a zeolite KL impregnated with a metal promotor such as platinum, in which the zeolite crystals are of hockeypuck shape. The |
| 6737556 |
Method and system for reducing decomposition byproducts in a methanol to olefin reactor system |
May 18, 2004 |
| Disclosed is a method and system for reducing the formation of metal catalyzed side-reaction byproducts formed in the feed vaporization and introduction system of a methanol to olefin reactor system by forming and/or coating one or more of the heating devices, feed lines or feed intr |
| 6734330 |
Catalyst pretreatment in an oxygenate to olefins reaction system |
May 11, 2004 |
| Disclosed is a crystalline silicoaluminophosphate molecular sieve comprising a porous framework structure and at least one single ring aromatic compound within the porous framework structure. The silicoaluminophosphate molecular sieve is used to convert oxygenate feed stock to olefin |
| 6733637 |
Process for producing ultra-high purity isopropanol |
May 11, 2004 |
| A process for producing high purity isopropyl alcohol. In one embodiment, the process includes the steps of: (a) feeding a feed stream comprising at least about 99.9 wt. % isopropyl alcohol into a separation column; (b) separating the isopropyl alcohol into an overhead stream taken overh |
| 6733572 |
Separation of propylene and dimethylether from hydrocarbon mixtures |
May 11, 2004 |
| The present invention is a process for separating propylene and dimethylether from a mixture comprising propylene, dimethylether, and propane. The mixture is passed through a bed of an adsorbent comprising a porous crystalline material having (i) diffusion time constants for dimethyl |
| 6719953 |
Process for the manufacture of olefins by a pyrolysis furnace with an internally finned U shaped |
April 13, 2004 |
| The present invention is directed towards a fired heater for heating a process fluid that uses U tubes provided with increased internal heat transfer surface to reduce tube metal temperatures and coking. and at the same time is not prone to plugging from coke. The fired heater comprises |
| 6717025 |
Process for removing oxygenates from an olefinic stream |
April 6, 2004 |
| The present invention provides a process for removing oxygenate impurities, e.g., dimethyl ether, from an olefinic product stream by converting the oxygenate impurity to a compound whose boiling point differs by at least about 5.degree. C. from the oxygenate impurity. Typically, the comp |
| 6717023 |
Method for converting oxygenates to olefins |
April 6, 2004 |
| 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 |
| 6716018 |
Pelletizer knife hub transport mechanism |
April 6, 2004 |
| A mechanism for transporting a hub is provided. Particularly, a transport mechanism for a pelletizer knife hub is disclosed. The mechanism comprises a clamp for selectively engaging and releasing the shaft of the pelletizer knife hub. The clamp is connected to a support bar. The support |
| 6713574 |
Ethylene copolymerization process |
March 30, 2004 |
| This invention is a solution process for the preparation of ethylene-a-olefin-diolefin copolymers comprising contacting ethylene, one or more a-olefin monomer, and one or more cyclic diene monomer, with a catalyst composition comprising a bridged, bis(cyclopentadienyl) zirconium comp |
| 6710116 |
Abrasion resistant transparent and colorable elastomeric compositions |
March 23, 2004 |
| Transparent and colorable elastomeric compositions are provided. The transparent elastomeric compositions can be covulcanized with rubbers such as polybutadiene, polyisoprene, styrene-butadiene rubber, styrene-isoprene-butadiene rubber, isoprene-butadiene rubber, ethylene-propylene d |
| 6710008 |
Method of making molecular sieve catalyst |
March 23, 2004 |
| Disclosed is a method for making molecular sieve catalyst particles. Dried molecular sieve catalyst particles are used to make the catalyst. The dried molecular sieve catalyst particles are put into an aqueous solution and stirred to make a slurry. The slurry is dried to make the molecul |
| 6699938 |
Cationic catalysts and process for using said catalysts |
March 2, 2004 |
| A cationic catalyst composition comprising a reactive cation and a compatible non-coordinating anion is preferably used at a temperature of 20.degree. C. or less to produce olefin polymers, particularly polymers and copolymers of isobutylene. |
| 6699811 |
Tailored zeolite bound zeolite catalyst and its use for hydrocarbon conversion |
March 2, 2004 |
| There is provided a zeolite bound zeolite catalyst which does not contain significant amount of non-zeolitic binder and can be tailored to optimize its performance and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst |
| 6696032 |
Process for manufacturing a silicoaluminophosphate molecular sieve |
February 24, 2004 |
| Small particle size SAPO-34 is obtained by using a tetraalkyl orthosilicate as the silicon source. |
| 6689723 |
Sulfide- and polysulfide-containing lubricating oil additive compositions and lubricating compos |
February 10, 2004 |
| This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity, at least one organic polysulfide comprising less than about 88% dihydrocarbyl trisulfide, from up to about 5% dihydrocarbyl disulfide, and more than about 7 wt. % dihydro |
| 6686433 |
Dual donor catalyst system for the polymerization of olefins |
February 3, 2004 |
| The present invention provides a catalyst system that exhibits unexpected control of desired properties in polyolefin products. The catalyst system includes a titanium-supported catalyst in combination with a mixture of tetraethoxysilane (TEOS) and dicyclopentyldimethoxy-silane (DCPMS). |
| 6686419 |
Multimodal ethylene, alpha-olefin and diene polymers, processes for making and devices comprisin |
February 3, 2004 |
| This invention relates generally to synthetic polymers, generally with improved balance of processability, resilience and durability. These polymers are generally of the ethylene, alpha-olefin, diene terpolymer type. |
| 6685905 |
Silicoaluminophosphate molecular sieves |
February 3, 2004 |
| In SAPO manufacture, handling of the synthesis mixture is facilitated by providing an initial aluminium-containing aqueous slurry with an H.sub.2 O:Al.sub.2 O.sub.3 weight ratio of 3:1 to 8:1. |
| 6684644 |
Method for utilizing gas reserves with low methane concentrations and high inert gas concentrati |
February 3, 2004 |
| The invention is directed to a method of fueling gas turbines from natural gas reserves with relatively low methane concentrations. The invention uses such reserves to generate electric power. The invention permits the use of these reserves at significantly lower cost than by producing |
| 6680418 |
Process for producing light olefins |
January 20, 2004 |
| 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 reaction mixture which contains methanol and/or dimethyl ether and at least 10 wt % of a polymethylbenzene component s |
| 6680278 |
Synthesis of silicoaluminophosphates |
January 20, 2004 |
| The invention is directed to a method of synthesising silicoaluminophosphate molecular sieves using synthesis templates that contain at least one dimethylamino moiety. The use of dimethylamino moiety containing templates results in good quality SAPO molecular sieves of CHA framework |
| 6680272 |
Catalysts and processes using them |
January 20, 2004 |
| Co-precipitated CoCuMn and CoCuMg catalysts are used in Fischer-Tropsch synthesis. |
| 6677481 |
Cracking of neo-C9 and neo-C13 carboxylic acids to either pivalic acid or methyl pivalate |
January 13, 2004 |
| A method for production of pivalic acid comprising the steps of: (a) reacting isobutylene, carbon monoxide, and a first catalyst to produce a reaction mixture; (b) contacting the reaction mixture with water, thereby producing a crude acid product having pivalic acid and oligomeric ne |
| 6677441 |
Cationic group 3 catalyst system |
January 13, 2004 |
| A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by a monoanionic bidentate ancillary ligand and two monoanionic ligands. The ancillary ligand and the transition metal form a metallocycle |
| 6673978 |
Process for making olefins |
January 6, 2004 |
| Disclosed is a method for converting an oxygenate feedstock to an olefin product. In particular, the method incorporates the use of a silicoaluminophosphate molecular sieve catalyst in the manufacture of ethylene and propylene. The method includes contacting an oxygenate-containing f |
| 6673878 |
Tubular polymerization reactors and polymers made therein |
January 6, 2004 |
| Tubular reactor apparatus and processes are provided for improved polymerization including using chain transfer agents and multiple monomer feeds spaced lengthwise along the tubular reactor providing high conversions of monomer into polymer. The invention also relates to polymers mad |
| 6670518 |
Olefin recovery in a polyolefin production process |
December 30, 2003 |
| Disclosed is a method of recovering olefin from purge streams in a polyolefin production process. The method includes reacting a purge stream containing olefin and impurities with water in the presence of a hydrating catalyst to produce an alcohol containing stream. The impurities can |
| 6670517 |
Process for alkylating aromatics |
December 30, 2003 |
| A process for alkylating aromatics is provided which comprises contacting an aromatic-containing feed with alkylating agent in the presence of a silica-bound ZSM-5 zeolite catalyst, wherein the ZSM-5 has a crystal size no greater than 0.05 micron, said contacting being conducted under |
| 6670431 |
Continuous slurry polymerization volatile removal |
December 30, 2003 |
| A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slu |
| 6670412 |
Method of melt processing amine containing polyethylenes |
December 30, 2003 |
| Melt processed linear polyethylenes containing an amine additive are shown to exhibit improved processability through the addition of certain surfactants. The amine compounds are generally one or more hindered amine light stabilizers (HALS), amine antistats, amine antioxidants or amine |
| 6667272 |
Highly active supported catalyst compositions |
December 23, 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 |
| 6664348 |
Highly active supported catalyst compositions |
December 16, 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 |
| 6660896 |
Isomerization of ethylbenzene and xylenes |
December 9, 2003 |
| In a process for isomerizing a feed comprising ethylbenzene and a mixture of xylene isomers, the feed is first contacted under xylene isomerization conditions with a first catalyst composition to produce an intermediate product having a higher para-xylene concentration than the feed, and |
| 6660812 |
Production of olefin derivatives |
December 9, 2003 |
| Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin is sent to an olefin reaction unit to form an olefin derivative product. The olefin derivative product is recovered from the reaction unit while a vent stream is also removed. Olefin is separate |
| 6660682 |
Method of synthesizing molecular sieves |
December 9, 2003 |
| The invention is directed to a method of synthesizing a molecular sieve. In particular, the invention is directed to a method for synthesizing a molecular sieve, especially a silicoaluminophosphate molecular sieve, in the presence of a templating agent and a polymeric base. The invention |
| 6657022 |
Inhibiting catalyst coke formation in the manufacture of an olefin |
December 2, 2003 |
| Disclosed is a method for inhibiting catalyst coke formation in the manufacture of an olefin. In particular, the method inhibits coke formation on a silicoaluminophosphate molecular sieve catalyst in the manufacture of ethylene and/or propylene. The method includes contacting an oxyg |
| 6656345 |
Hydrocarbon conversion to propylene with high silica medium pore zeolite catalysts |
December 2, 2003 |
| The invention provides a method for converting a hydrocarbon feedstock to propylene comprising: contacting an olefinic hydrocarbon feedstock boiling in the naphtha range with a catalyst comprising a zeolitic catalyst selected from the group consisting of medium pore zeolites having a rat |
| 6653518 |
Reforming process for manufacture of para-xylene |
November 25, 2003 |
| A process for selectively producing para-xylene from a feedstock enriched in C.sub.8 isoalkanes and/or isoalkenes is disclosed. The feed is contacted with Group VIII metal loaded molecular sieve catalyst of low acidity under dehydrocyclization conditions wherein the molecular sieve h |
