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| Number | Title | Issue Date |
| 8153546 | Mixed metal oxide ammoxidation catalysts A catalytic composition useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, and mixtures thereof. The catalytic composition comprising a complex of metal oxides... | 04/10/2012 |
| 8143358 | Installation for gas-phase polymerisation Installation for the gas-phase polymerization of at least one olefinic monomer, comprising a horizontal stirred reactor (1) consisting of an undivided space, provided with a number of gas feeds (13a-13) in the bottom section of the reacto... | 03/27/2012 |
| 8030248 | Drilling fluid and process of making the same This invention relates to drilling fluids and processes for making drilling fluids, such as for use in environmentally sensitive areas. The environmentally friendly drilling fluid includes a first fluid component having between about 5 weight percent to about 95 wei... | 10/04/2011 |
| 8013111 | Removal of catalyst and/or cocatalyst residues in a polyolefin manufacturing process The invention relates to an improved process for the manufacture of an olefin polymer composition in which corrosive trace cocatalyst and catalyst residues are removed from the hydrocarbon gas recycle stream prior to compression and re-use in the polymerization zone... | 09/06/2011 |
| 7919428 | Method of making mixed metal oxide catalysts for ammoxidation and/or oxidation of lower alkane hydrocarbons The present invention comprises a method for preparing a mixed oxide catalyst for use in producing acrylonitrile or methacrylonitrile from propane or isobutene by ammoxidation in a gaseous phase via methods of heating or calcining precursor solid mixture to obtain m... | 04/05/2011 |
| 7754910 | Mixed metal oxide catalysts for the ammoxidation of propane and isobutane A process for the ammoxidation of a saturated or unsaturated or mixture of saturated and unsaturated hydrocarbon to produce an unsaturated nitrile, said process comprising contacting the saturated or unsaturated or mixture of saturated and unsaturated hydrocarbon wi... | 07/13/2010 |
| 7754657 | Method for removing asphaltene deposits Compositions comprising at least one C4-C30 olefin or oxidation product thereof and kerosene or an aromatic solvent are particularly effective for use in removing asphaltene and asphaltene-containing organic deposits and in preventing or reduci... | 07/13/2010 |
| 7674943 | Propylene polymer catalyst donor component A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins containing magnesium, titanium, and halogen further contains an internal electron donor comprising a compound containing electron donating substituents with a structure: | 03/09/2010 |
| 7629286 | Phosphorus addition process for improvement of catalysts suitable for maleic anhydride production A process is disclosed for the improvement of fluid bed vanadium phosphorus mixed oxide catalyst performance in the manufacture of maleic anhydride from butane, which process comprises impregnating the VPO catalyst powder with a phosphorus compound, such as an alkyl... | 12/08/2009 |
| 7576232 | In situ modification of molybdenum-based catalysts A process for the conversion of a hydrocarbon selected from the group consisting of propylene, isobutylene, propane, isobutane or mixtures thereof, to acrylonitrile, methacrylonitrile, or mixtures thereof, the process comprising the step of reacting in the vapor pha... | 08/18/2009 |
| 7531681 | Process for the ammoxidation of propane and isobutane A process for the ammoxidation of a saturated or unsaturated or mixture of saturated and unsaturated hydrocarbon to produce an unsaturated nitrile, said process comprising contacting the saturated or unsaturated or mixture of saturated and unsaturated hydrocarbon wi... | 05/12/2009 |
| 7491838 | Purification of acetonitrile by a distillative recovery/ion exchange resin treatment process A process of producing HPLC grade acetonitrile (UV cutoff | 02/17/2009 |
| 7442345 | Reactor apparatus A new reactor apparatus that can be used to carry out chemical reactions in a fluidized catalyst bed at high temperatures with reduced afterburning or other undesirable downstream side reactions. ... | 10/28/2008 |
| 7437891 | Recovery and purification of ethylene A process for the recovery and purification of ethylene and optionally propylene from a stream containing lighter and heavier components that employs an ethylene distributor column and a partially thermally coupled distributed distillation system. ... | 10/21/2008 |
| 7378476 | Olefin polymerization process in the presence of a radical generating system An olefin polymerization process comprises gas-phase polymerization of at least one olefin monomer in a reactor using a Ziegler-Natta or metallocene catalyst system in the presence of at least one suitable radical-generating compound in an amount sufficient for poly... | 05/27/2008 |
| 7348291 | Catalyst for the manufacture of acrylonitrile A catalyst comprising a complex of catalytic oxides comprising potassium, cesium, cerium, chromium, cobalt, nickel, iron, bismuth, molybdenum, wherein the relative ratios of these elements is represented by the following general formula AaK... | 03/25/2008 |
| 7326391 | Process for recovery and recycle of ammonia from a vapor stream A process for the recovery of unreacted ammonia from the effluent from a reaction zone used to produce acrylonitrile or methacrylonitrile comprising quenching the reactor effluent with an aqueous solution of ammonium phosphate in at least two stages, thereby capturi... | 02/05/2008 |
| 7319040 | Process control using on-line instrumentation and process models A method for providing improved estimates of properties of a chemical manufacturing process is disclosed. The method employs a process model that includes, or is modified by, scores or other gains obtained from the mathematical transformation of data obtained from a... | 01/15/2008 |
| 7316804 | Flow reactors for chemical conversions with heterogeneous catalysts Improved apparatus for use in process systems which include exothermic chemical conversions of organic compounds to value added products is disclosed, more particularly, flow reactors for exothermic chemical conversions using a fixed heterogeneous catalyst with mean... | 01/08/2008 |
| 7311813 | Distillation sequence for the purification and recovery of hydrocarbons This invention is an improved distillation sequence for the separation and purification of ethylene from a cracked gas. A hydrocarbon feed enters a C2 distributor column. The top of the C2 distributor column is thermally coupled to an ethylene distributor column, an... | 12/25/2007 |
| 7282600 | Method for inhibiting polymerization during the recovery and purification of unsaturated mononitriles Economical processes are disclosed for recovery and refining of valuable nitrogen-containing organic compounds formed by catalytic oxidation of least one feed compound selected from the group consisting of propane, propylene, isobutane and isobutylene in the presenc... | 10/16/2007 |
| 7250527 | Process for recovering acrylonitrile or methacrylonitrile A process for the recovery of acrylonitrile or methacrylonitrile from an aqueous solution comprising subjecting the said solution to a water extractive distillation by feeding the solution to a distillation column and performing said extractive distillation and usin... | 07/31/2007 |
| 7211674 | Process for the recovery of oxazole A process for the recovery of oxazole comprising contacting a mixture comprising oxazole and acetonitrile with an acid to form an acid salt of oxazole; separating acid salt of the oxazole from the mixture; and neutralizing the acid salt of oxazole separated from the... | 05/01/2007 |
| 7071348 | Process for the purification of olefinically unsaturated nitriles A process for the recovery and purification of olefinically unsaturated nitrites from a process stream produced by the ammoxidation of a hydrocarbon feedstock comprising contacting the process stream comprising olefinically unsaturated nitrile with an aqueous quench... | 07/04/2006 |
| 7071140 | Catalyst for the manufacture of acrylonitrile A catalyst comprising a complex of catalytic oxides comprising rubidium, cerium, chromium, iron, bismuth, molybdenum, and at least one of nickel or nickel and cobalt, optionally magnesium, and optionally one of phosphorus, antimony, tellurium, sodium, lithium, potas... | 07/04/2006 |
| 7041757 | Latent metallocene catalyst systems for olefin polymerization A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of an unsaturated hydrocarbon passivating compound. ... | 05/09/2006 |
| 7015287 | Compositions based on random propylene copolymers, process for their manufacture, and heat-sealable multilayer sheets comprising them Compositions based on propylene polymers (compositions (C)) comprising: a) from 61 to 74% by weight of a random propylene copolymer (copolymer (A)) comprising from 8 to 16% by weight of monomer units derived from 1-butene and less than 0.5% by weight of monomer unit... | 03/21/2006 |
| 6998449 | Latent metallocene catalyst systems for olefin polymerization A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of a passivating compound selected from the group of oxygen, oxygen-containing compounds, and nitrogen-containing compounds. ... | 02/14/2006 |
| 6989455 | Two-stage process for the hydrogenation of maleic acid to 1,4-butanediol In the process for the conversion of maleic acid to gamma-butyrolactone, 1.4-butanediol and/or tetrahydrofuran, a feedstream comprising maleic acid is hydrogenated in a first hydrogenation zone to produce a reaction product comprising succinic acid and unreacted hyd... | 01/24/2006 |
| 6982342 | Ammoxidation of carboxylic acids to a mixture of nitriles A process for increasing the yield of acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a carboxylic acid, ammonia and air into a reaction zone containing a... | 01/03/2006 |
| 6965046 | Catalyst for the manufacture of acrylonitrile A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum, cobalt, cerium, antimony, at least one of nickel or magnesium, and at least one of lithium, sodium, potassium, rubidium, or thallium, and characterized by the following emp... | 11/15/2005 |
| 6960550 | Catalyst systems for high melting thermoplastic elastomeric α-olefin polymers and plastomers A metallocene catalyst system component for polymerization of olefins includes at least one 2-arylindenyl ligand substituted on the 1-position by a substituted or unsubstituted alkyl, alkylsilyl, or aryl substituent of 1 to 30 carbon atoms. ... | 11/01/2005 |
| 6936665 | Integrated advanced chemical process control The application discloses a system for controlling a chemical manufacturing process having at least one piece of process limiting equipment in addition to a reactor. The system employs one or more multivariable predictive optimizer controllers for optimizing control... | 08/30/2005 |
| 6933347 | Tubes obtained from a propylene polymer composition Tubes formed from a propylene based composition having a flexural modulus of elasticity of 1,400 to 2,000 MPa and a melt flow index of 0.1 to 1 g/10 minutes, including: from 80 to 97 parts in weight of a propylene homopolymer (A) having an isotacticity index of at l... | 08/23/2005 |
| 6930132 | Use of a polypropylene based composition for expanded beads Use of a polypropylene based composition (C) comprising (a) from 5 to 95% by weight of a random copolymer of propylene (A) containing from 0.5 to 12 mole % of at least one comonomer chosen from ethylene and/or an alpha-olefin containing from 4 to 6 carbon atoms, and... | 08/16/2005 |
| 6887825 | Method for the preparation of vanadium-antimony-oxide based oxidation and ammoxidation catalysts using non-aqueous media Vanadium antimony oxide catalysts useful for the selective oxidation and ammoxidation of paraffins, olefins, and aromatic compounds are manufactured in a process comprising (i) forming a catalyst precursor slurry comprising a vanadium containing compound and an anti... | 05/03/2005 |
| 6864384 | Preparation of vanadium antimony oxide based catalysts using nano-scale iron A process for the manufacture of an improved iron promoted vanadium antimony oxide catalyst useful in the ammoxidation of propane to acrylonitrile wherein the source of iron (i.e. an iron containing compound such as Fe2O3) employed in the catal... | 03/08/2005 |
| 6486367 | Process for the hydrogenation of maleic acid to 1,4-butanediol Maleic acid and/or other hydrogenatable precursors are hydrogenated in the presence of a noble metal catalyst to 1,4-butanediol. The production and yields of 1,4-butanediol are enhanced by the addition of iron to the hydrogenatable precursor feed.... | 11/26/2002 |
| 6458742 | Catalyst for the manufacture of acrylonitrile A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum, cobalt, cerium, antimony, at least one of nickel or magnesium, and at least one of lithium, sodium, potassium, rubidium, or thallium, and characterized by the fo... | 10/01/2002 |
| 6451730 | Two-stage preparation of promoted V/Sb-oxide ammoxidation catalysts A process for the preparation of a promoted VSbOx catalyst comprising mixing a vanadium compound, at least a first portion of an antimony compound, and at least a portion of the support material to form a slurry, heating the slurry to remove th... | 09/17/2002 |
