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8173749 |
Photocrosslinkable materials
A diamine compound of formula (I) is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound.
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8158816 |
Process for lightening the color of polyol esters
The present invention relates to a process for lightening the color of polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, wherein...
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8148570 |
Process for preparing vinyl acetate with utilization of the heat of reaction
Vinyl acetate is prepared by a) continuous gas-phase reaction of ethylene, acetic acid and oxygen at 1 to 30 bar and 130° C. to 200° C., the process heat being removed by heat exchange with water a...
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8062482 |
Acetaldehyde removal from methyl acetate by distillation at elevated pressure
A method for removing acetaldehyde from a mixture of methyl acetate, methanol and acetaldehyde includes: (a) feeding the mixture of methyl acetate, methanol and acetaldehyde to a distillation...
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7803965 |
Method for recovery of ethylene in a recirculating gas process for the production of vinyl acetate
The efficiency of vinyl acetate production is increased by scrubbing of off gas followed by CO2 absorption. A portion of the off gas containing substantial quantities of ethylene is recycled to the...
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7553397 |
Process
A process is described for the recovery of substantially pure ethyl acetate from a feedstock including ethyl acetate, ethanol and water. The process includes supplying the feedstock to a first...
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7465823 |
Utilization of acetic acid reaction heat in other process plants
Integrated processes and systems for producing acetic acid and vinyl acetate are provided. In the processes and systems, a portion of the heat produced during the production of the acetic acid is...
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7393436 |
Thermal separating process for removing at least one stream containing enriched (meth) acrylic monomers
A thermal separating process for removing a stream containing enriched (meth)acrylic monomers from a mixture containing (meth)acrylic monomers, in which the liquid phases retained in the separating...
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7390919 |
Methyl acetate purification and carbonylation
Disclosed is a method for removing aldehyde impurities from a methyl acetate supply. The method comprises reacting the methyl acetate supply with a polyol and converting the aldehyde impurities to...
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7390918 |
Integrated process for the manufacture of alkenyl carboxylates
An integrated process for the production of an alkenyl carboxylate, such as vinyl acetate which process comprises the steps of (a) contacting in an oxidation reaction zone a C2 to C4 alkane, such...
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7371890 |
Method for the continuous production of a compound that carries at least two functional groups
A process for continuously preparing a compound which bears at least two functional groups which are each independently selected from the group consisting of nitrile group, carboxylic acid group,...
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7355066 |
Process for making terpene esters
A process for making terpene esters is disclosed. Reaction of a terpene alcohol with acetic anhydride in the presence of a high-boiling amine provides a terpene ester. Acetic acid, which is...
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7342142 |
Hydrogenation of polytrimethylene ether glycol
A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, after hydrogenation, has a APHA color of less than about 50.
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7301048 |
Process for isolating vinyl acetate
A process for isolating vinyl acetate from the gas mixture formed in the reaction of ethylene with acetic acid and oxygen in the gas phase over catalysts comprising palladium or palladium...
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7160524 |
Process and apparatus for the production of butylacetate and isobutylacetate
The invention relates to an apparatus for the production of butylacetate by esterification of acetic acid with butanol in the presence of a solid acidic catalyst in which distillatory separation of...
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7115773 |
Coupled production of two esters
The invention relates to a method for the coupled production of two esters by reacting a mixture of aliphatic alcohols with an aliphatic carboxylic acid and then treating the resulting mixture by...
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7115772 |
Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream
The present invention is directed to using methyl acetate from a vinyl acetate-based or a vinyl-or ethylene-alcohol based polymer or copolymer process directly for use in a methanol carbonylation...
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6992213 |
Method for removing trifluoroethanol from liquids
Trifluoroethanol can be isolated from organic liquids that are contaminated by trifluoroethanol by bringing the contaminated liquid into contact with a molecular sieve having a pore size ranging...
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6946570 |
Ester synthesis
This invention relates to a process for the production of lower aliphatic esters by reacting a lower olefin with a saturated lower aliphatic mono-carboxylic acid in the vapor phase in the presence...
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6838566 |
Salts of HMG-CoA reductase inhibitors
Lovastatin, pravastatin, simvastatin, mevastatin, atorvastatin, and derivatives and analogs thereof are known as HMG-CoA reductase inhibitors and are used as antihypercholesterolemic agents. The...
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6794535 |
Ester synthesis
Process for the production of lower aliphatic esters comprising reacting a lower olefin with a saturated lower aliphatic monocarboxylic acid in the vapor phase in the presence of a heteropolyacid...
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6765110 |
Process for the simultaneous coproduction and purification of ethyl acetate and isopropyl acetate
This invention relates to a process for the simultaneous coproduction of ethyl acetate and isopropyl acetate. The esterification reaction comprises contacting acetic acid with a mixed alcohol...
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6710204 |
Decreasing method of N-oxyl compound
There is provided a superior decreasing method of an N-oxyl compound contained in an easily polymerizable material, according to which the N-oxyl compound contained in an easily polymerizable...
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6663692 |
Process for purifying carbon dioxide-containing gas streams
A process for removing at least one compound selected from acetic acid, acetate esters and aldehydes from a gaseous fraction comprising carbon dioxide and such a compound. The process includes the...
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6635775 |
Reduced odor esters and process for producing same
An improved process for preparing reduced-odor or odorless esters, preferably benzoate esters, octanoate esters, aliphatic emollient esters and glycol dibenzoate esters. The improved process...
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6632959 |
Basic catalysts and process for producing carbonyl compound derivatives
A base catalyst, obtained by formulating at least one alkali metal compound selected from the group consisting of alkoxides, hydroxides and oxides of alkali metals and an alkaline-earth metal oxide...
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6632330 |
Process for purification of alkyl alkanoate
A process for the recovery of substantially pure alkyl alkanoate, such as ethyl acetate, from an impure feedstock. The impure feedstock is contacted with a selective hydrogenation catalyst in the...
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6586609 |
Process for esterification in a chromatographic reactor
Process for the esterification of organic acids with alcohols in a reactor of the chromatographic type in which the heterogeneous solid phase is capable of acting both as an esterification catalyst...
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6538164 |
Recovery process for volatile compounds from solids in aqueous solution
Volatile compounds may be economically recovered from solids present in aqueous solution by subjecting the solution to rapid separation where the volatilization occurs in a flash, spray, or fluid...
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6399812 |
Production of aliphatic esters
Aliphatic esters, R'COOR are produced by reacting the corresponding alcohol, ROH having carbon numbers of the alkyl groups, R′ and R, between 0 and 9 and 1 and 10, respectively, with molecular o...
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6383343 |
Separation of components from methanol mixtures by extractive distillation
A method of separating methanol and acetone, and methanol and methyl acetate involves distilling a mixture of the components by an extractive distillation process in the presence of an extractive...
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6375804 |
Tertiary butyl acetate recovery
The present invention provides a distillation separation method whereby tertiary butyl acetate is separated by distillation as an overhead stream from a bottoms acetic acid stream with the proviso...
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6375807 |
Separation of ethanol mixtures by extractive distillation
A method of separating ethanol and ethyl acetate, and ethanol and water involves distilling a mixture of the components by an extractive distillation process in the presence of an extractive...
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6258978 |
Controlling product stream oxygen content in process for the production of vinyl acetate
In a process for the production of vinyl acetate by reacting ethylene, acetic acid and an oxygen-containing gas in a reactor to produce a process stream which is removed from the reactor as an...
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6232491 |
Purification process for removal of impurities in acetic acid-ethylene reactions
This invention is a process for the removal of acetaldehyde impurities from ethyl acetate formed by reacting acetic acid with ethylene over a catalyst by refining a crude mixture of ethyl acetate,...
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6228226 |
Process for working up crude, liquid vinyl acetate
A process for working up crude, liquid vinyl acetate feed containing acetic acid, water and ethyl acetate and optionally smaller amounts of other impurities by distillation, wherein there is...
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6222076 |
Process for the preparation of substituted cycloketones
The invention relates to a novel process for the preparation of hydroxyalkyl- and acyloxyalkyl-substituted cycloketones by free-radical addition of hydroxyalkenes and acyloxyalkenes respectively to...
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6150553 |
Method for recovering methyl acetate and residual acetic acid in the production acid of pure terephthalic acid
A method for recovering methyl acetate and residual acetic acid in a two-stage process for producing pure terephthalic acid having a first oxidation stage and a second purification stage.
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6107515 |
Process for preparing methacrylic or acrylic esters
A process for producing a methacrylic acid ester or an acrylic acid ester comprising: reacting methacrolein or acrolein with an alcohol or molecular oxygen in the presence of a catalyst comprising...
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6093845 |
Ester co-production
This invention relates to a process for the simultaneous co-production of ethyl acetate and n-butyl acetate. The process involves reacting a reaction mixture of ethanol, n-butanol and acetic acid...
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5993610 |
Separation of ethyl acetate from ethanol by azeotropic distillation
Ethyl acetate cannot be separated from ethanol by distillation or rectification because of the closeness of their boiling points. Ethyl acetate is readily separated from ethanol by azeotropic...
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5952458 |
Process for preparing a vinyl terminated polymer
Synthesis of a vinyl terminated polymer by reacting a cationically polymerizable monomer in the form of a cyclic ether with an acid chloride in a suitable solvent and in the presence of a Lewis...
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5777157 |
Process for production and purification of triacetin
A method for producing and purifying triacetin. The method includes an initial separation of triacetin from a crude composition of triacetin and impurities. The separated triacetin is then...
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5763645 |
Process for recovering optical isomers and solvent process for using solvent by circulation and process for reusing optical isomers in optical resolution
A process for recovering and reusing a solvent and optical isomers, characterized by using a simulated moving packed bed which comprises an inlet for an eluent, an outlet for an extract containing...
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5726345 |
Process for perfuming textiles
We describe a process for perfuming fabrics washed in the presence of a lipase-containing detergent and, optionally, subsequently treated with a fabric softener, said process being characterized in...
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5672735 |
Process for the preparation of a dicarboxylic acid di-chloride
The present invention refers to a Process for the preparation of S-(-)-5- 2-(acetyloxy)-1-oxopropyl!amino!-2,4,6-triiodo-1,3-benzenedi
carb oxylic acid dichloride of formula (I) comprising the...
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5527949 |
Method for making an amine and an alkyl ester and method for reducing hydrogen cyanide levels in alkyl ester
A method for making an amine includes the steps of heating a reaction mixture including a nitrile, an acid, water and a substrate compound capable of generating a carbonium ion by reaction with the...
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5519162 |
Method for removing a hydrogen cyanide contaminant from an organic liquid
A method for removing hydrogen cyanide from a hydrogen cyanide-contaminated organic liquid includes the steps of contacting the hydrogen cyanide-contaminated organic liquid with a metal alkoxide to...
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5504239 |
Process for separating off alkanols from other organic compounds of higher carbon number
A first alkanol having from 1 to 3 carbon atoms can be separated off from other organic compounds of higher carbon number from the group comprising other alcohols, polyalcohols, ethers, oxo...
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RE35107 |
Recovery of isopropyl acetate and ethanol from an isopropyl acetate ethanol and water-containing stream
High purity isopropyl acetate and ethanol are recovered from a process stream containing isopropyl acetate, ethanol and water by a multiple step process including extracting substantially all of...
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