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| Number | Title | Issue Date |
| 8153840 | Oxidation system with sidedraw secondary reactor Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti... | 04/10/2012 |
| 7935844 | Recovery of energy during the production of aromatic carboxylic acids Energy is recovered during the production of aromatic carboxylic acids by liquid phase oxidation of aromatic hydrocarbons by performing a high efficiency separation on the reactor overhead vapor to form a high pressure gaseous overhead stream comprising water and or... | 05/03/2011 |
| 7919652 | Process to produce an enriched composition through the use of a catalyst removal zone and an enrichment zone A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 04/05/2011 |
| 7902395 | Versatile oxidation byproduct purge process Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus pro... | 03/08/2011 |
| 7897809 | Process to produce an enrichment feed A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 03/01/2011 |
| 7897808 | Versatile oxidation byproduct purge process Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus pro... | 03/01/2011 |
| 7888529 | Process to produce a post catalyst removal composition A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 02/15/2011 |
| 7884231 | Process to produce an enriched composition A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 02/08/2011 |
| 7880031 | Process to produce an enrichment feed A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 02/01/2011 |
| 7855305 | Process to produce an enriched composition A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 12/21/2010 |
| 7759516 | Versatile oxidation byproduct purge process Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus pro... | 07/20/2010 |
| 7741515 | Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti... | 06/22/2010 |
| 7741516 | Process to enrich a carboxylic acid composition A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to... | 06/22/2010 |
| 7659427 | Optimized liquid-phase oxidation Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reacti... | 02/09/2010 |
| 7468456 | Azeotropic distillation process for separating acetic acid, methylacetate and water in the production of an aromatic carboxylic acid An improved process for producing an aromatic carboxylic acid from an aromatic alkyl hydrocarbon is described, wherein the improvement comprises using the same aromatic alkyl hydrocarbon as the azeotropic agent for separation of acetic acid and methyl acetate from w... | 12/23/2008 |
| 7393973 | Polycarboxylic acid production system with enhanced residence time distribution for oxidative digestion Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes an oxidative digestion reactor/zone configured to provide optimized residence time distribution for the solid and liquid phases of the reaction me... | 07/01/2008 |
| 7355067 | Process for the production of triiodotrimesic acid A new process for the production of triiodotrimesic acid that is used as an intermediate product for the synthesis of x-ray contrast media is described. ... | 04/08/2008 |
| 7250529 | Synthesis process for 2-(3-hydroxy-1-adamantyl)-2-oxoacetic acid A highly advantageous process for the preparation of 2-(3-hydroxy-1-adamantyl)-2-oxoacetic acid or a salt thereof is described. The process comprises subjecting 1-acetyl 3-hydroxyadamantane to liquid phase oxidation with permanganate to produce 2-(3-hydroxy-1-adaman... | 07/31/2007 |
| 7238833 | Production of aromatic carboxylic acids A process for the production of an aromatic carboxylic acid comprising contacting in the presence of a catalyst, within a continuous flow reactor, one or more precursors of the aromatic carboxylic acid with an oxidant, such contact being effected with said precursor... | 07/03/2007 |
| 7183421 | Processes for producing oxide with higher oxidation than alcohol The present invention provides a process for producing an oxide from an alcohol compound, the process comprising the steps of causing silica gel to carry the alcohol compound thereon and an oxidative catalyst thereon, and oxidizing the alcohol compound in the presen... | 02/27/2007 |
| 7166740 | Process for the production of triiodotrimesic acid A new process for the production of triiodotrimesic acid that is used as an intermediate product for the synthesis of x-ray contrast media is described. ... | 01/23/2007 |
| 7161026 | Method of preparation of methyl-benzyl-ketone A process for producing phenylacetic acid is provided. The process includes combining sodium, chlorobenzene, toluene, and a catalyst to form a suspension. This suspension is mixed to form phenylsodium. Upon boiling, the suspension forms benzylsodium. The suspension ... | 01/09/2007 |
| 7135596 | Method of removing iron contaminants from liquid streams during the manufacture and/or purification of aromatic acids This invention relates to control or removal of amounts of dissolved iron that may be present in liquid process streams in the manufacture of aromatic acids. The present invention further relates to the control or removal of dissolved iron contaminants present in li... | 11/14/2006 |
| 7094925 | Oxidation of alkyl-aromatic compounds A process for the oxidation of an alkyl-aromatic compound, wherein the aromatic compound is admixed with an oxidising agent or sulfur compound in the presence of an ionic liquid is described. In this process, air, dioxygen, peroxide, superoxide, any other form of ac... | 08/22/2006 |
| 7049465 | Process for energy recovery in processes for the preparation of aromatic carboxylic acids This invention relates to a process for the manufacture of aromatic carboxylic acids by exothermic liquid phase oxidation of an aromatic feedstock. More particularly, this invention relates to the efficient energy recovery of the exotherm produced by the liquid phas... | 05/23/2006 |
| 6933406 | Method for producing 2-halo-6-nitrobenzoic acids The present invention relates to a process for the preparation of 2-halo-6-nitrobenzoic acids by oxidation of 2-halo-6-nitro-benzyl alcohols, esters, ethers, or mixtures thereof with nitric acid and to the use of this process as a step in the preparation of 2-halo-6... | 08/23/2005 |
| 6797830 | Process for producing oxide with higher oxidation than alcohol The present invention provides a process for producing an oxide from an alcohol compound, the process comprising the steps of causing silica gel to carry the alcohol compound thereon and an oxidative catalyst thereon, and oxidizing the alcohol compound in the presen... | 09/28/2004 |
| 6765113 | Production of aromatic carboxylic acids A process for the production of an aromatic carboxylic acid comprising contacting in the presence of a catalyst, within a continuous flow reactor, one or more precursors of the aromatic carboxylic acid with an oxidant, such contact being effected with said precursor... | 07/20/2004 |
| 6743952 | Selective liquid phase air oxidation of toluene catalysed by composite catalytic system The present invention provides an improved process for the production of benzaldehyde with 40-50% selectivity by the catalytic liquid phase air oxidation of toluene using a composite catalytic system comprising salts of iron, cobalt, manganese, molybdenum or nickel ... | 06/01/2004 |
| 6696604 | Addition of mineral acids or salts thereof to a TMA production process This invention is related to the production of trimellitic anhydride (TMA). More specifically, the invention is related to the addition of a mineral acid or salt thereof in the production process of trimellitic anhydride to reduce the viscosity of the bot... | 02/24/2004 |
| 6670502 | Process for the production of aromatic acids Process for producing mono- and poly-carboxylic aromatic acids wherein an aromatic compound having at least one oxidizable substituent directly linked to the carbon atom of the corresponding aromatic nucleus is oxidized in the presence of a catalyst syste... | 12/30/2003 |
| 6660883 | Process for the preparation of 2-aryl propionic acids The present invention provides an improved process for the preparation of 2-aryl propionic acid which by subjecting an aryl compound selected from an aryl alcohol or aryl halide or an aryl olefin to carbonylation in the presence of a halide source, a prot... | 12/09/2003 |
| 6642419 | Oxidation method In the presence of (1) an oxidizing catalyst comprising an imide compound such as N-hydroxyphthalimide, or (2) an oxidizing catalyst comprising such imide compound and a transition metal element-containing compound as a co-oxidizing agent (e. g., oxides, ... | 11/04/2003 |
| 6562996 | Alkyl aromatic aldehydes A composition containing isomeric mixtures of arylaldehydes prepared from a mixed alkyl aromatic feedstock. A composition containing isomeric mixtures of dimethylbenzaldehydes prepared from a mixed xylene feedstock using a Gatterman-Koch type reaction. A ... | 05/13/2003 |
| 6548698 | Oxidative carbonylation of toluene catalyzed by rhodium and iridium This invention relates generally to the oxidative carbonylation of toluene, catalyzed by rhodium or iridium complexes in the presence of an oxidant and under mild conditions, whereby toluic acid is produced with para-selectivity up to 98%.... | 04/15/2003 |
| 6518455 | Process for preparing substituted aromatic and heteroaromatic aldehydes and carboxylic acids A process for preparing substituted aromatic and heteroaromatic aldehydes or carboxylic acids of the formula ##STR1## in which R1 and R2 are H, C1 -C4 alkyl, C1 -C4 alkoxy, OH, NO2 | 02/11/2003 |
| 6504051 | Process for production of aromatic carboxylic acids with improved water removal technique Disclosed is an improved process for the continuous production of aromatic carboxylic acids by the liquid-phase oxidation of an alkyl aromatic compound with an oxygen-containing gas in the presence of oxidation catalyst which results in reduced wastewater... | 01/07/2003 |
| 6458994 | Process for producing aromatic polycarboxylic acid A process for producing a polycarboxylic acid which comprises performing liquid phase oxidation of polyalkyl-substituted aromatic aldehyde and/or oxide derivative of polyalkyl-substituted aromatic aldehyde as raw material for oxidation with molecular oxyg... | 10/01/2002 |
| 6440327 | Polymers and use thereof as scale inhibitors Compositions and methods for inhibiting scale are provided. Pursuant to the present invention, a composition for inhibiting scale is provided that includes a carbohydrate polymer having both nitrogen-containing groups and carboxyl groups. The nitrogen-con... | 08/27/2002 |
| 6433196 | Production method of citalopram, intermediate therefor and production method of the intermediate Citalopram can be industrially and economically produced and at a high yield by reacting a compound of the following formula [VI] with 3-(dimethylamino)propyl chloride in the presence of at least one of N,N,N',N'-tetramethylethylenediamine and 1,3-dimethy... | 08/13/2002 |
