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| Number | Title | Issue Date |
| 7910766 | Preparation of at least one partial oxidation and/or ammoxidation product of a hydrocarbon A process for preparing at least one partial oxidation and/or ammoxidation product of a hydrocarbon by partially dehydrogenating at least one saturated hydrocarbon H under heterogeneous catalysis and using the resulting product gas mixture A, which comprises the par... | 03/22/2011 |
| 7326802 | Preparation of at least one partial oxidation and/or ammoxidation product of propylene In a process for preparing at least one partial oxidation and/or ammoxidation product of propylene, the propylene is obtained from crude propane by dehydrogenating and subjected in the presence of unconverted propane as a constituent of a gas mixture 2 which compris... | 02/05/2008 |
| 7321058 | Method for producing acrolein and/or acrylic acid Acrolein and/or acrylic acid are prepared from propane and/or propene by a process comprising the following steps: (a) separation of propane and/or propene from a propane- and/or propene-containing gas mixture by absorption in an absorbent, (b) separation of the pro... | 01/22/2008 |
| 7304180 | Process for producing metal oxide catalyst The invention relates to a process for producing a metal oxide catalyst capable of producing acrylic acid, acrylonitrile or the like in one stage by catalytic oxidation reaction of propane in a high yield. The invention is characterized by using one obtained ... | 12/04/2007 |
| 7288669 | NOx treated mixed metal oxide catalyst An improved catalyst comprising a mixed metal oxide, either promoted or not, 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... | 10/30/2007 |
| 7271279 | Method for the production of unsaturated nitriles from alkanes The invention relates to a process for preparing unsaturated nitrites from the corresponding alkanes which comprises the steps: a) feeding an alkane into a dehydrogenation zone and catalytically dehydrogenating the alkane to the co... | 09/18/2007 |
| 7238827 | Preparation of at least one partial oxidation and/or ammoxidation product of propylene Process for preparing at least one partial oxidation and/or ammoxidation product of propylene, in which the propylene is produced from crude propane by dehydrogenation and is subjected to a heterogeneously catalyzed gas-phase partial oxidation and/or partial gas-pha... | 07/03/2007 |
| 7229946 | Catalyst composition for the selective conversion of alkanes to unsaturated carboxylic acids, method of making and method of using thereof A catalyst composition having the formula: Mo1VaSbbNbcMdOx wherein M is gallium, bismuth, silver or gold, a is 0.01 to 1, b is 0.01 to 1, c is 0.01 to 1, d is 0.01 to 1 and x is de... | 06/12/2007 |
| 7193121 | Method for producing 4-vinylcyclohexene, ethyl benzole and styrene The invention relates to a process for preparing 4-vinylcyclohexene, which comprises the steps (A) providing an n-butane-containing feed gas stream, (B) feeding the n-butane-containing feed gas stream into at least... | 03/20/2007 |
| 7161021 | Process for producing a polynitrile compound In a process for producing a polynitrile compound comprising introducing a polysubstituted organic compound (POC) which is a carbon ring or heterocyclic compounds having a plurality of organic substituents into a reactor with ammonia and a gas containing oxygen and ... | 01/09/2007 |
| 7034195 | Method for the production of butadiene from n-butane The invention relates to a process for preparing butadiene from n-butane comprising the steps (A) providing an n-butane-containing feed gas stream, (B) feeding the n-butane-containing feed gas stream into a first d... | 04/25/2006 |
| 7022307 | Method for gas—solid contacting in a bubbling fluidized bed reactor The present invention relates to a method for gas-solid contacting in a bubbling fluidized bed reactor by: (a) introducing into a reactor with bed length to bed diameter ratio below about 5.0, a primary gas consisting essentially of reactant(s) of the r... | 04/04/2006 |
| 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 |
| 6916945 | NOx treated mixed metal oxide catalyst A 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 alkene to an u... | 07/12/2005 |
| 6911185 | Fluidized-bed reactor for the oxychlorination of ethyene, oxygen and HCl A fluidized-bed reactor for the oxychlorination of ethylene, oxygen and HCL, comprises a heat exchanger, having tube packets in the fluidized-bed for releasing the heat evolved from exothermic reaction to a heat-transfer medium in the tube packets, in particular to ... | 06/28/2005 |
| 6894183 | Method for gas—solid contacting in a bubbling fluidized bed reactor The present invention relates to a method for gas-solid contacting in a bubbling fluidized bed reactor by: (a) introducing into a reactor with bed length to bed diameter ratio below about 5.0, a primary gas consisting essentially of reactant(s) of the r... | 05/17/2005 |
| 6860971 | Process for recovery of olefinically unsaturated nitriles A process is described for the recovery of acrylonitrile from an ammoxidation reactor effluent stream containing acrylonitrile, water, and organic impurities. The process includes the steps of (a) quenching an ammoxidation reactor effluent stream that includes acryl... | 03/01/2005 |
| 6825380 | Promoted multi-metal oxide catalyst A catalyst comprising a promoted 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 alken... | 11/30/2004 |
| 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 |
| 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 |
| 6339169 | Method of quenching gaseous acrylonitrile and hydrogen cyanide product stream The present invention provides an improvement in a process and apparatus for manufacturing acrylonitrile by the vapor phase ammoxidation of a hydrocarbon. The invention comprises contacting the gaseous product stream with a quench fluid in a reverse jet s... | 01/15/2002 |
| 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 |
| 6156921 | Method and apparatus for direct oxygen injection with a reactant stream into a fluidized bed reactor A system provides an oxygen-bearing gas and a gaseous reactant stream to a fluidized bed reactor. A sparger causes an entraining of the oxygen bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and int... | 12/05/2000 |
| 6143915 | Reaction process in hybrid reactor for propylene ammoxidation A hybrid reactor arrangement provides a reactive design that achieves higher acrylonitrile yield and lower catalyst circulating rate. The hybrid reactor design first passes a mixture of reactants and catalyst through a circulating bubbling bed reaction se... | 11/07/2000 |
| 6107509 | Process for the recovery of acrylonitrile and methacrylontrile The process of manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising transporting a reactor effluent containing the unsaturated mononitrile to a first column where the reactor effluen... | 08/22/2000 |
| 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 |
| 6083869 | Method for preparing ammoxidation catalysts The present invention relates to a process for the preparation of mixed vanadium, antimony and iron oxides and to their use as catalysts for the ammoxidation of alkanes. The process for the preparation of a mixed oxide defined above is characterized in th... | 07/04/2000 |
| 6020533 | Hydrocarbon conversion processes using crystalline manganese phosphate compositions Hydrocarbon conversion processes using a new family of crystalline manganese phosphate compositions is disclosed. These compositions have an extended network; which network can be a one-, two-, or three-dimensional network. The composition has an empirica... | 02/01/2000 |
| 6002019 | Process for the production of petrochemicals Petrochemicals are produced by the vapor phase reaction of a hydrocarbon with air in the presence of a suitable catalyst. The petrochemical product is removed from the product gas stream, and part or all of the remaining gas stream is passed through a bed... | 12/14/1999 |
| 6002040 | Reduced pressure drop in acrylonitrile absorber via direct contact spray heat exchange A process for manufacturing acrylonitrile comprising reacting propylene, ammonia and oxygen in a reactor zone in the presence of a catalyst to produce a reactor effluent containing crude acrylonitrile, transferring the reactor effluent containing crude ac... | 12/14/1999 |
| 5977396 | Method for recovering acrylonitrile contained in a gas A method for recovering acrylonitrile contained in a gas, which comprises contacting a gas containing acrylonitrile with water to let the acrylonitrile be absorbed in water, wherein the acrylonitrile is absorbed in water in the presence of a substance hav... | 11/02/1999 |
| 5965765 | Process for producing ,ଲ-unsaturated nitrile A process for producing an ,ଲ-unsaturated nitrile from propylene, isobutylene or tert-butyl alcohol in an industrial fluidized reactor with the step of feeding methanol and an oxygen-containing gas in the course of the whole contact time of t... | 10/12/1999 |
| 5961945 | Method of producing cyano compounds by ammoxidation An ammoxidizable compound is reacted with an ammonium salt, especially an inorganic ammonium salt, in the presence of a source of oxygen and an ammoxidation catalyst at 100 to 700° C., preferably 200 to 700° C., in order to produce cyano compounds of th... | 10/05/1999 |
| 5959134 | Recovery of organics from process flare header A process for the enhanced recovery of waste organics, mainly hydrogen cyanide (HCN) and acrylonitrile, from the process flare material obtained from the reactor effluent of an ammoxidation reaction of propylene or isobutylene.... | 09/28/1999 |
| 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 |
| 5895822 | Process for purifying acrylonitrile The fouling rate of quench systems in acrylonitrile manufacturing processes is reduced by maintaining a low level of highboiling organic compounds in aqueous recycle streams to the quench systems.... | 04/20/1999 |
| 5883281 | Oxygen addition to reduce inerts in an acrylonitrile reactor A process for increasing the yield of an ammoxidation product by passing a feed into a reactor, passing an oxygen-containing gas stream containing at least a portion of inerts into the reactor, passing a substantially pure oxygen stream into the reactor, ... | 03/16/1999 |
| 5869730 | Oxidant reduction by manipulation and/or treatment of aqueous acrylonitrile process streams A process for manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising reacting an olefin selected from the group consisting of propylene and isobutylene, ammonia and oxygen in a reactor... | 02/09/1999 |
| 5866708 | Process for producing ଲ-unsaturated nitrile A process for producing an ,ଲ-unsaturated nitrile, the process comprising the step of: reacting (1) a hydrocarbon selected from an olefin selected from propylene and isobutylene, a paraffin selected from propane and butane, and tertiary butyl... | 02/02/1999 |
| 5801265 | Method and apparatus for direct oxygen injection with a reactant stream into a fluidized bed reactor A system provides an oxygen-bearing gas and a gaseous reactant stream to a fluidized bed reactor. A sparger causes an entraining of the oxygen bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and int... | 09/01/1998 |
