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| Number | Title | Issue Date |
| 8097756 | Process for producing carboxylic acid anhydrides A process for producing carboxylic acid anhydrides by the carbonylation reaction of a carboxylic acid ester, derived from an alcohol and a carboxylic acid, with carbon monoxide containing a small amount of hydrogen in a liquid reaction medium in the presence of a Gr... | 01/17/2012 |
| 7553991 | Process for producing carboxylic acid anhydrides The present invention relates to a process for producing carboxylic acid anhydrides, in which a carboxylic acid ester, derived from an alcohol and a carboxylic acid, and carbon monoxide containing a small amount of hydrogen are used as raw materials and subjected to... | 06/30/2009 |
| 7253304 | Carbonylation process Disclosed is a carbonylation process wherein a mixture of a dialkyl carbonate and halide compound is contacted with carbon monoxide in the presence of a metal selected from Group VIII of the Periodic Table to co-produce carbon dioxide and a carbonyl compound selecte... | 08/07/2007 |
| 6992212 | Felxible method for the common production of formic acid, a carboxylic acid having at least two carbon atoms, and/or the derivatives of the same Formic acid and a carboxylic acid having at least two carbon atoms and/or derivatives thereof are prepared jointly by a process in which (a) a formic ester (I) is transesterified with a carboxylic acid having at least two carbon at... | 01/31/2006 |
| 6984755 | Processes for the preparation of a carboxylic anhydride and use of the carboxylic anhydride as an acylation agent A process for the preparation of an carboxylic anhydride by reaction of an ethylenically unsaturated compound with carbon monoxide and an carboxylic acid in the presence of a catalyst involving: a) a source of a group VIII metal; b) a biden... | 01/10/2006 |
| 6521783 | Processes for preparing oxygenates This invention relates in part to a processes for the conversion of a feedstock stream comprising carbon monoxide and hydrogen to a product stream comprising at least one of an ester, acid, acid anhydride and mixtures thereof. This invention also relates ... | 02/18/2003 |
| 6420304 | Polymer-supported carbonylation catalyst and its use The invention relates to a polymer-supported carbonylation catalyst and its use in a process for preparing organic carboxylic acid or anhydride having n+1 carbon atoms. The invention relates also to a process for preparing organic carboxylic acid or anhyd... | 07/16/2002 |
| 6222070 | Method for reducing EDA in acetic anhydride production In a liquid phase carbonylation process for the production of acetic anhydride by reacting a feed stream which includes methyl acetate, methanol and carbon monoxide using a Group VIII metal-containing catalyst, and preferably a rhodium containing material... | 04/24/2001 |
| 6087533 | Rhodium catalyzed carbonylation of an allylic butenol or butenyl ester to beta-gamma unsaturated anhydrides A process for the carbonylation of allylic butenol or butenyl ester of a carboxylic acid (e.g., crotyl acetate, 3-acetoxybutene-1 and mixtures thereof) in an anhydrous carboxylic acid solvent and production of beta-gamma unsaturated carboxylic acid anhydr... | 07/11/2000 |
| 6049005 | Process to prepare a pentenoic acid anhydride Process to prepare a pentenoic acid anhydride in the pressence of a catalyst comprising palladium and an organic phosphine ligand, wherein the corresponding alkoxycarbonyl butene is reacted with carbon monoxide at a temperature between 50 and 130° C. and... | 04/11/2000 |
| 5939585 | Process for the carbonylation of an alcohol A process for the carbonylation of a C1 to C4 alkyl alcohol and/or a reactive derivative thereof by contacting a C1 to C4 alkyl alcohol and/or a reactive derivative thereof with carbon monoxide in a liquid react... | 08/17/1999 |
| 5892110 | Heterogeneous catalyst for the production of acetic anhydride from methyl acetate This invention relates to a process for producing acetic anhydride by the reaction of methyl acetate, carbon monoxide, and hydrogen at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that c... | 04/06/1999 |
| 5648531 | Process for producing acetic anhydride alone or acetic anhydride and acetic acid A process for continuously producing acetic anhydride alone or acetic anhydride and acetic acid by reacting methyl acetate and/or dimethyl ether and, optionally, water and/or methanol, with carbon monoxide alone or carbon monoxide and hydrogen in the pres... | 07/15/1997 |
| 5488143 | Processes for the carbonylation of methanol to form acetic acid, methyl acetate and acetic anhydride The present invention provides an improved process for selectively producing acetic acid and/or methyl acetate by the gas phase carbonylation of methanol with carbon monoxide; an improved process for producing acetic anhydride directly from the methyl ace... | 01/30/1996 |
| 5385875 | Method for stabilizing rhodium compound A concentrated catalyst solution used in a carbonylation reaction in which methyl acetate or dimethyl ether is chemically bonded with carbon monoxide in the presence of a catalyst system comprising a rhodium compound and an alkali metal iodide to produce ... | 01/31/1995 |
| 5380929 | Process for the preparation of acetic acid and acetic anhydride To prepare acetic acid and acetic anhydride, methanol and methyl acetate are reacted under anhydrous conditions with carbon monoxide in the presence of a catalyst system containing carbonyl complexes of group VIII noble metals, methyl iodide, an alkali me... | 01/10/1995 |
| 5364822 | Process for the recovery of group VIII noble metals In the process for recovery of Group VIII noble metal carbonylation catalyst from a process stream which also contains tar produced during a carbonylation process for carboxylic acid anhydride production, the process stream is diluted with alkyl halide an... | 11/15/1994 |
| 5362365 | Purification of acetic anhydride or acetic anhydride and acetic acid using ozone Acetic acid and/or acetic anhydride containing methyl crotonate, vinyl acetate, or both as impurities, is contacted with ozone in an amount of excess molar to the carbon-carbon double bond in said methyl crotonate and/or vinyl acetate and the impurities p... | 11/08/1994 |
| 5360929 | Process for the production of carboxylic acid anhydrides A process for the production of a carboxylic acid anhydride comprises contacting a reaction composition comprising a carboxylic acid ester, a hydrocarbyl halide and/or a hydrocarbyl ether reactant and a hydrocarbyl halide promoter with carbon monoxide in ... | 11/01/1994 |
| 5349102 | Process for the preparation of phenyl carbonates or polycarbonates A process for the preparation of an aromatic carbonate or polycarbonate from a phenol or bisphenol, methanol, carbon monoxide and oxygen comprising the steps of 1) reacting phenol or bisphenol with acetic anhydride to form (bis)phenyl acetate; 2) reacting... | 09/20/1994 |
| 5300198 | Process for the separation of ethylidene diacetate from acetic anhydride A distillation process for the separation of acetic anhydride from a mixture thereof with ethylidene diacetate wherein the mixture of acetic anhydride and ethylidene diacetate is fed to the mid section of a distillation column and a small amount of acetic... | 04/05/1994 |
| 5298586 | Process for the production of carboxylic acid anhydrides The solubility and stability of rhodium catalysts in rhodium-catalysed carbonylation of alkyl esters or alkyl ethers under substantially anhydrous conditions to produce carboxylic acid anhydrides is improved by the use of co-promoters selected from the gr... | 03/29/1994 |
| 5292948 | Continuous process for the preparation of acetic anhydride or mixtures of acetic anhydride and acetic acid Disclosed is a continuous process for the preparation of acetic anhydride which comprises carbonylating a mixture comprising (i) methyl iodide and (ii) methyl acetate and/or dimethyl ether in the presence of a rhodium catalyst and a promoter wherein the c... | 03/08/1994 |
| 5244545 | Process for removing acetone from carbonylation processes Disclosed is an improved process for the removal of acetone from a production system wherein acetic anhydride is produced by contacting a mixture comprising methyl iodide and methyl acetate and/or dimethyl ether with carbon monoxide in the presence of a c... | 09/14/1993 |
| 5220060 | Method for making anhydride from ester using a palladium-containing catalyst system Methylene and oxymethylene bis-esters are produced by the reaction of an aliphatic ester of a carboxylic acid, formaldehyde and carbon monoxide in the presence of a catalytic amount of a Group VIII noble transition metal compound, an iodide or bromide pro... | 06/15/1993 |
| 5214205 | Process for the preparation of acetic anhydride from methyl formate The invention relates to a process for the preparation of acetic anhydride, characterized in that a gas containing essentially CO, at a pressure of at least 1 MPa, is reacted with methyl formate in the presence of a) a rhodium-based catalyst, b) two iodine-con... | 05/25/1993 |
| 5206434 | Purification process for methyl acetate Esters such as methyl acetate which contain carbonyl impurities including aldehydes are purified by adding to the esters an amino compound which reacts with the carbonyls to form water soluble nitrogenous derivatives, separating an organic ester phase fro... | 04/27/1993 |
| 5189203 | Process for preparing acetic acid, methyl acetate, acetic anhydride or mixtures thereof The present invention relates to a process for preparing acetic acid, acetic acid methyl ester or acetic anhydride or mixtures thereof by converting a synthesis gas mainly containing hydrogen and carbon oxides, by first converting the synthesis gas cataly... | 02/23/1993 |
| 5138093 | Process for preparing ethylidene diacetate Ethylidene diacetate is prepared by treating at least one member of the group consisting of methyl acetate and dimethyl ether with carbon monoxide in the presence of a source of halide under substantially anhydrous conditions.... | 08/11/1992 |
| 5124290 | Process for removing metallic corrosion products from carbonylation reactions carried out under anhydrous conditions A process for removing metallic corrosion products from carbonylation reactions which are carried out under anhydrous conditions and in which methyl acetate and/or methanol and/or dimethyl ether are reacted over a noble metal catalyst system which compris... | 06/23/1992 |
| 5100850 | Oxidative secondary rhodium recovery process Disclosed is an oxidative process for recovering rhodium catalyst values from "tars" formed during the preparation of acetic anhydride by the rhodium catalyzed carbonylation of a mixture of methyl iodide and methyl acetate and/or dimethyl ether. The discl... | 03/31/1992 |
| 5097069 | Process for decomposing ,ଲ-unsaturated carbonyl compounds in refining acetic anhydride and/or acetic acid Unsaturated ketones such as mesityl oxide may be removed from acetic anhydride, or mixtures of acetic anhydride and acetic acid, by heating a solution comprising (1) acetic anhydride, or a mixture of acetic anhydride and acetic acid, (2) an ,³... | 03/17/1992 |
| 5057192 | Acetone removal from acetic anhydride production process Disclosed is an improved process for the removal of acetone from a production system wherein acetic anhydride is produced by contacting a mixture containing methyl iodide and methyl acetate and/or dimethyl ether with carbon monoxide in the presence of a c... | 10/15/1991 |
| 5047377 | Process for the purification and recovery of the contaminated solution of the catalyst produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether In a process for the purification and recovery of a contaminated catalyst solution produced during carbonylation of methanol and/or methyl acetate and/or dimethyl ether and containing carbonyl complexes of rhodium, organic and/or inorganic promoters, undi... | 09/10/1991 |
| 5026903 | Production of ethylidene diacetate from dimethyl acetal A process for the production of ethylidene diacetate by the catalytic reaction of dimethyl acetal, methyl acetate and carbon monoxide in contact with a homogeneous catalyst system containing rhodium metal atom and lithium iodide.... | 06/25/1991 |
| 5026907 | Production of carboxylic acids from alcohols using rhodium complex catalysts and organic ester source A process for the production of organic carboxylic acids and organic carboxylic acid anhydrides by the catalytic reaction of an alcohol of the formula ROH and carbon monoxide in contact with an organic ester source and a homogeneous catalyst system of rho... | 06/25/1991 |
| 5008451 | Methylene and oxymethylene bis-ester production Methylene and oxymethylene bis-esters are produced by the reaction of an aliphatic ester of a carboxylic acid, formaldehyde and carbon monoxide in the presence of a catalytic amount of a Group VIII noble transition metal compound, an iodide or bromide pro... | 04/16/1991 |
| 5002914 | Process for purifying and recovering the contaminated catalyst solution arising in the carbonylation of methanol and/or methyl acetate and/or dimethyl ether A process for purifying and recovering the contaminated catalyst solution arising from the carbonylation of methanol, methyl acetate and/or dimethyl ether. The solution contains carbonyl complexes of rhodium, quaternary organophosphorus compounds as organ... | 03/26/1991 |
| 4985383 | Process for removing metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether In a process for removing the metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether and containing carbonyl complexes of noble metals from group VIII of the Peri... | 01/15/1991 |
| 4959498 | Process for the preparation of monocarboxylic anhydrides The process for the preparation of monocarboxylic anhydrides of the general formula (RCO)2 O is carried out by reacting a carboxylic ester or a dialkyl ether of the general formula RCOOR or ROR, in which R in each case denotes the same alkyl ra... | 09/25/1990 |
