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| Number | Title | Issue Date |
| 7365041 | Method for producing ammoxidation catalyst An ammoxidation catalyst comprising a molybdenum (component (1)), bismuth (component (2)), at least one element selected from the group consisting of nickel, cobalt, zinc, magnesium, manganese and copper (component (3)) and at least one element selected from the gro... | 04/29/2008 |
| 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 |
| 7341974 | Method for preparing a catalyst for partial oxidation of propylene The present invention relates to a method for preparing a catalyst for partial oxidation of propylene, particularly a method for preparing a catalyst for preparing an acrylic acid, using an organic acid such as a citric acid, maleic acid and oxalic acid. The complex... | 03/11/2008 |
| 7223896 | Fines co-feed for maintaining efficient reactor hydrodynamics This invention provides processes for maintaining a desired particle size distribution in an oxygenate to olefin reaction system. In one embodiment, the invention comprises replacing lost catalyst fines with less active co-catalyst particles. By adding less active c... | 05/29/2007 |
| 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 |
| 7012039 | Oxide catalyst composition An oxide catalyst composition for use in producing methacrolein or a mixture of methacrolein and methacrylic acid, wherein the oxide catalyst composition is represented by the formula (Mo+W)l2BiaAbBcFedXe | 03/14/2006 |
| 6984750 | PVD supported mixed metal oxide catalyst A supported catalyst comprising a mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane and an alke... | 01/10/2006 |
| 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 |
| 6924387 | Solid catalyst with core-shell catalytic phase and a method of preparation thereof The present invention relates to a sold catalyst for manufacturing of a nitrile compound and a method of preparation thereof. More particularly, this invention relates to the solid catalyst expressed by the following formula (1): BiaAaBb | 08/02/2005 |
| 6919016 | Process for the utilization of refinery C4 streams A process is disclosed for preparing a C4 stream for feeding to an alkylation process which reacts isobutane with butene to produce isooctane. The C4 stream is treated in a first distillation column reactor to remove dienes and mercaptans and s... | 07/19/2005 |
| 6740769 | Molybdenum-bismuth-iron-containing metal oxide catalysts for fluidized layer, method for preparation thereof, and use thereof A process for producing a molybdenum-bismuth-iron-containing metal oxide fluidized bed catalyst which has a controlled particle diameter and has satisfactory activity and physical properties. In a process for producing a fluidized bed catalyst containing molybdenum-... | 05/25/2004 |
| 6723869 | Method for producing acrylonitrile, catalyst for use therein and method for preparing the same For the production of acrylonitrile by ammoxidation of propylene, there is provided a catalyst capable of giving a high yield for a long period of time. In producing acrylonitrile by ammoxidation of propylene, there is used a metal oxide as a catalyst, which metal o... | 04/20/2004 |
| 6667020 | Ammoxidation of a mixture of ketones to acetonitrile and HCN A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ... | 12/23/2003 |
| 6596897 | Catalyst for producing acrylonitrile A fluidized-bed catalyst for producing acrylonitrile by the ammoxidation of propylene, which comprises a silica carrier and a composite having the following formula: Aa Cc Dd Naf Feg Bih Mi... | 07/22/2003 |
| 6479691 | Catalyst for producing unsaturated nitrile A catalyst composition represented by the following empirical formula which is useful in production of unsaturated nitrites by ammoxidation: Mo10 Bia Feb Sbc Nid Cre Ff Gg ... | 11/12/2002 |
| 6413485 | Ammoxidation of a mixture of ketones to acetonitrile and HCN A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ... | 07/02/2002 |
| 6245931 | Process for producing acrylonitrile or methacrylonitrile Disclosed is a process for producing acrylonitrile from propylene, or methacrylonitrile from isobutylene by ammoxidation using an improved catalyst composition comprising an oxide catalyst represented by the formula: Mom Bib Fef... | 06/12/2001 |
| 6238574 | Oxidation and ammoxidation of acrylonitrile process waste water organics A process for upgrading aqueous acrylonitrile waste streams containing organic material comprising atomizing an acrylonitrile waste water stream containing organic material, introducing the atomized acrylonitrile waste water stream at a temperature below ... | 05/29/2001 |
| 6136998 | Retention of activity of molybdenum-containing metallic oxide catalyst In the gas phase oxidation of an organic compound, using a metallic oxide fluidized-bed catalyst that contains molybdenum in an amount of 10% by weight or more, bismuth, and at least an element selected from the group consisting of iron and cerium, when t... | 10/24/2000 |
| 6124233 | Highly active and selective catalysts for the production of unsaturated nitriles, methods of making and using the same An improved catalyst for the production of unsaturated nitriles from their corresponding olefins, the catalyst having the atomic ratios described by the empirical formula Bia Mob Vc Sbd Nbe Af ... | 09/26/2000 |
| 6087525 | Highly active and selective catalysts for the production of unsaturated nitriles, methods of making and using the same An improved catalyst for the production of unsaturated nitrites from their corresponding olefins, the catalyst composition having the atomic ratios described by the empirical formula Bia Mob Vc Sbd Nbe | 07/11/2000 |
| 6087524 | Preparation of vanadium antimonate based catalysts using Sno2 .multidot.xH2 o A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula: VSbm Aa Dd Ox where A is one or more Ti, Sn, where Sn is always present D is one or more Li, Mg, Ca, S... | 07/11/2000 |
| 6084119 | Process for producing unsaturated nitrile A process for producing acrylonitrile or methacrylonitrile, wherein a molybdenum compound, which is convertible to molybdenum oxide and not supported on a carrier is added to a fluidized bed reactor as an activator, in such a way that the ratio y of molyb... | 07/04/2000 |
| 6072070 | Vanadium/antimony/titanium mixed oxide and process of use in vapor phase ammoxidation of an alkane Mixed oxide vanadium/antimony/titanium ammoxidation catalysts, particularly suited for the ammoxidation of alkanes and exhibiting X-ray diffraction spectra which are characteristic of a crystallographic phase of rutile TiO2, are prepared by (a)... | 06/06/2000 |
| 6063728 | Ammoxidation catalyst for use in producing acrylonitrile or methacrylonitrile from propane or isobutane by ammoxidation An ammoxidation catalyst comprising a compound oxide of Mo, V, Nb, and at least one element selected from the group consisting of Te and Sb, wherein the compound catalyst exhibits an X-ray diffraction pattern satisfying the following relationship: 0.40ࣘ... | 05/16/2000 |
| 6057471 | Ammoxidation method in fluidized-bed reactor An ammoxidation method in a fluidized-bed reactor, in which, when a starting material to be ammoxidized is ammoxidized by means of vapor-phase catalytic fluidized-bed reaction, the reaction is carried out in a fluidized-bed reactor to which an oxygen-cont... | 05/02/2000 |
| 6013825 | Process for producing unsaturated nitrile The present invention is a process for producing an unsaturated nitrile such as acrylonitrile or methacrylonitrile by ammoxidation of an organic compound such as propylene, isobutene or tertiary butanol. The process comprises carrying out the ammoxidation... | 01/11/2000 |
| 5840955 | Waste minimization and product recovery process A process for the enhanced recovery of hydrogen cyanide (HCN) obtained from the reactor effluent of an ammoxidation reaction of propylene or isobutylene comprising passing the reactor effluent through a quench column, an absorber column, a first distillat... | 11/24/1998 |
| 5686373 | Polymetal oxide materials Polymetal oxide materials of the general formula I A!p B!q (I), where ##STR1## X1 is W, Nb, Ta, Cr and/or Ce, X2 is Cu, Ni, Co, Fe, Mn and/or Zn, X3 is Sb an... | 11/11/1997 |
| 5658842 | Ammoxidation catalyst composition, and process for producing acrylonitrile or methacrylonitrile using the same Disclosed is an ammoxidation catalyst composition for use in producing acrylonitrile from propylene, or methacrylonitrile from isobutene or tert-butanol, by ammoxidation of the propylene or of the isobutene or tert-butanol, comprising an oxide catalyst co... | 08/19/1997 |
| 5576469 | Paraffin ammoxidation using vanadium antimony oxide based catalysts with halide promoters The process for the ammoxidation of a C3 to C5 paraffinic hydrocarbon to its corresponding ,ଲ-unsaturated hydrocarbon comprising reacting the C3 to C5 paraffinic hydrocarbon with ammonia and oxygen ... | 11/19/1996 |
| 5466837 | Process for the production of hydrocarbon partial oxidation products An ethylene stream which contains ethane as an impurity or a propylene stream which contains propane as an impurity is subjected to adsorption at a temperature of 50° to 200° C. in a bed of adsorbent which selectively adsorbs ethylene or propylene, ther... | 11/14/1995 |
| 5466857 | Process for reduction of waste material during manufacture of acrylonitrile A process for the reduction in the amount of waste material generated during the manufacture of acrylonitrile comprising introducing an additional amount of oxygen containing gas, preferably air, in the substantial absence of any oxygenate compounds, into... | 11/14/1995 |
| 5378668 | Process for reactivating ammoxidation catalysts Molybdenum/bismuth-based fluid-bed catalysts which are used for the ammoxidation of olefins can be reactivated by addition of a mixed oxide of formula Mo20 (P, Cr)0.3-2.0 (Bi, Ni, Fe, Co)1.33-4.0 Ox wherein, besides ... | 01/03/1995 |
| 5268497 | Process for the production of nitriles A process for the production of an ethylenically unsaturated nitrile from a hydrocarbon feed stream comprised of a mixture of an alkene and an alkane by reaction with an oxygen-containing gas and ammonia. The alkene is converted to unsaturated nitrile by ... | 12/07/1993 |
| 5264608 | Process for the production of nitriles from alkenes A process for the production of an ethylenically unsaturated nitrile from a hydrocarbon feed stream comprised of a mixture of an alkene and an alkane by reaction with an oxygen-containing gas and ammonia. The alkene is converted to unsaturated nitrile by ... | 11/23/1993 |
| 5258543 | Method for ammoxidation of olefins Disclosed is a method for ammoxidizing C3 to C5 mono-olefins to ,ଲ-mono-unsaturated acyclic nitriles having 3 to 5 carbon atoms and HCN by introducing such mono-olefins molecular oxygen and ammonia into a reaction zone i... | 11/02/1993 |
| 5256810 | Method for eliminating nitriding during acrylonitrile production An improved process for substantially eliminating, preferably completely eliminating of nitride formation on feed conduits for fluid bed catalyst reactors used in the manufacture of unsaturated nitriles from corresponding olefins, NH3 and oxyge... | 10/26/1993 |
| 5235088 | Process and catalyst for propylene ammoxidation to acrylonitrile Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a c... | 08/10/1993 |
| 5223469 | Fluidized-bed catalyst for preparing acrylonitrile The present invention relates to a fluidized-bed catalyst for propylene ammoxidation to produce acrylonitrile, which consists of silica support and a composite of the formula Aa Bb Cc Nid Coe Naf | 06/29/1993 |
