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| Number | Title | Issue Date |
| 7439381 | Hydrocyanation method A process is described for preparing 3-pentenenitrile by hydrocyanating 1,3-butadiene with hydrogen cyanide over at least one catalyst, wherein the 1,3-butadiene and/or hydrogen cyanide is contacted with at least one microporous solid before the reaction. ... | 10/21/2008 |
| 7285514 | Method for preparing catalyst for partial oxidation of acrolein The present invention relates to a method for preparing a catalyst for partial oxidation of acrolein, particularly to a method for preparing a catalyst for partial oxidation of acrolein that has a superior acrolein conversion rate, acrylic acid activity, selectivity... | 10/23/2007 |
| 7227049 | Ni catalysts and methods for alkane dehydrogenation Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), y... | 06/05/2007 |
| 7129195 | Heterogenically catalysed gas-phase partial oxidation method for precursor compounds of (meth)acrylic acid The invention relates to a method for the heterogenically catalyed gas-phase partial oxidation of precursor compounds of (meth)acrylic acid in a fixed catalyst bed, containing as the catalyst an activated mass of mixed oxide, shaped to form a geometric body. Said ge... | 10/31/2006 |
| 7005402 | Exhaust gas purifying catalyst compound, catalyst comprising said compound and method for preparing the compound The invention is to provide (i) a catalyst which does not require an activation of catalyst components by means of a calcination which has become a hindrance in the way of obtaining a catalyst having a high activity through a conventional technology and in which cat... | 02/28/2006 |
| 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 |
| 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 |
| 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 |
| 6171571 | Crystalline multinary metal oxide compositions, process for preparing and processes for using the composition A new family of crystalline metal oxide compositions have been synthesized. These compositions are described by the empirical formula: An NbMx M'y M"m Op where A is an alkali metal cation, ammonium ion and mixt... | 01/09/2001 |
| 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 |
| 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 |
| 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 |
| 5907052 | Process for producing acrylonitrile or methacrylonitrile from propane or isobutane by ammoxidation A process for producing acrylonitrile or methacrylonitrile from propane or isobutane by ammoxidation, which comprises reacting propane or isobutane with ammonia and molecular oxygen in the gaseous phase in a fluidized-bed reactor containing a catalyst com... | 05/25/1999 |
| 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 |
| 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 |
| 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 |
| 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 |
| 5175334 | Process for the manufacture of acrylonitrile and methacrylonitrile 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... | 12/29/1992 |
| 5160721 | Process for maintaining high level of yield of acrylonitrile and hydrogen cyanide in ammoxidation of propylene A process for conducting long-term ammoxidation of propylene in the presence of a metal oxide catalyst for ammoxidation of propylene at a temperature of from 300° C. to 500° C. to produce acrylonitrile and hydrogen cyanide, wherein in the process each o... | 11/03/1992 |
| 5132269 | Iron-antimony-molybdenum-containing oxide catalyst composition and process for preparing the same An iron-antimony-molybdenum-containing oxide catalyst composition for oxidation reactions, comprising a crystalline iron antimonate having a crystallite size of 100 Å or more, said catalyst being represented by the following empirical formula: Fea | 07/21/1992 |
| 5079207 | Catalyst for ammoxidation of paraffins Disclosed is a process for making an , ଲ-unsaturated monoitrile by the catalytic reaction of a paraffin containing 3-5 carbon atoms with molecular oxygen and ammonia by catalytic contact of the foregoing reactants in a reaction zone with a me... | 01/07/1992 |
| 4983752 | Preparation of acrylonitrile Acrylonitrile is prepared by a process which comprises the ammoxidation of propylene with ammonia and molecular oxygen or a gas containing molecular oxygen at from 300° to 600° C. in the presence of a metal oxide catalyst which contains tellurium and on... | 01/08/1991 |
| 4960921 | Multiply promoted MN-SB oxide catalysts Certain novel multiply promoted Mn-Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to ... | 10/02/1990 |
| 4871706 | Catalyst for the ammoxidation of paraffins Disclosed is the reaction of C3 to C4 paraffins with O2 and NH3 to make ,ଲ-unsaturated nitriles and olefins, using certain complex metal oxide catalysts containing V, Sb, W and certain optional elem... | 10/03/1989 |
| 4801731 | Preparation of acrylonitrile An improved process for the preparation of acrylonitrile by the reaction of propylene, ammonia and oxygen in a fluidized catalyst bed in which the propylene and ammonia are premixed and fed in downwardly streams that are directly aligned with upwardly dir... | 01/31/1989 |
| 4774352 | Process for ammoxidation The activity of a tellurium-free metal oxide catalyst used for ammoxidation of organic compounds at a temperature of from 300° C. to 600° C. is improved in the presence of (a) elemental tellurium or a tellurium compound which is in contact with said cat... | 09/27/1988 |
| 4769355 | Catalyst system for ammoxidation of paraffins Ammoxidation of C3 to C5 acyclic alkanes with NH3 and O2 using (1) a mole ratio of alkane:NH3 in the range from 2 to 16 and a mole ratio of alkane:O2 in the range 1 to 10 and (2) a mixture ... | 09/06/1988 |
| 4766232 | Production of unsaturated nitriles using catalysts containing boron, gallium or indium Certain catalysts containing iron and molybdenum plus bismuth or tellurium and nickel, cobalt, manganese, magnesium, zinc, cadmium, calcium or beryllium have been found to give especially large volumes of acrylonitrile or methacrylonitrile in a given time... | 08/23/1988 |
| 4757038 | Regeneration of iron-antimony metallic oxide catalysts Iron-antimony metallic oxide catalysts which have become deactivated after being used for the production of aldehydes, acids, nitriles, or dienes through oxidation, ammoxidation, or oxidative dehydrogenation of organic compounds in fluidized-bed reactors ... | 07/12/1988 |
| 4746753 | Preparation of acrylonitrile from propylene, oxygen and ammonia in the presence of an alkali metal promoted bismuth, cerium, molybdenum, tungsten catalyst Bismuth cerium molybdate catalysts promoted with alkali metal and other optional ingredients provide high yields of acrylonitrile in the ammoxidation of propylene.... | 05/24/1988 |
| 4709071 | Process for improving activity of tellurium containing metal oxide catalysts A process for improving the activity of tellurium containing metal oxide catalysts useful as catalysts for oxidation, ammoxidation or oxidative dehydrogenation of organic compounds by heating the catalysts together with a tellurium containing solid and an... | 11/24/1987 |
| 4709070 | Process for improving activity of tellurium containing metal oxide catalysts A process for improving the activity of tellurium containing metal oxide catalysts useful as catalysts for oxidation, ammoxidation or oxidative dehydrogenation of organic compounds by heating the catalysts together with an activity-improving agent to a te... | 11/24/1987 |
| 4618593 | Process for improving activity of tellurium containing metal oxide catalysts A regeneration process for tellurium-containing metal oxide catalysts used in the process for oxidation, ammoxidation or oxidative dehydrogenation of organic compounds at a temperature of about 300° C. to about 600° C. The process can be effectively app... | 10/21/1986 |
| 4532083 | Multiply promoted Sn/Sb oxide catalysts Certain multiply promoted Sn/Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to diolef... | 07/30/1985 |
| 4504420 | Producing acrylonitrile using a particular catalyst A process is provided for producing acrylonitrile by reacting at an elevated temperature in the vapor phase propylene, ammonia, and molecular oxygen over a specific catalyst. The catalyst has the empirical formula wherein a is from 0.5 to 2, b is from 0.01 to ... | 03/12/1985 |
| 4473506 | Iron selenium tellurium oxide catalysts Oxide complex catalysts of iron, selenium and tellurium provide good yields of acrylonitrile in the ammoxidation of propylene with high selectivities at low temperature.... | 09/25/1984 |
| 4472314 | Bismuth-containing mixed oxides of perovskite structure in oxidation of acyclic hydrocarbons Mixed oxides of bismuth with other metals of the perovskite structure and having vacant lattice sites in the same lattice positions occupied by bismuth are disclosed as partial oxidation and ammoxidation catalysts. Such oxides are used as catalysts in the... | 09/18/1984 |
