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7332626 |
Method for production of (meth) acrylic acid
A method for producing acrylic acid by absorbing acrylic acid at a high ratio and obtaining an acrylic acid-containing solution of high concentration is provided. This method comprises a step of...
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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...
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7287534 |
Cleaning of apparatus in which meth(acrylic) acid-containing organic solvents have been treated and/or generated
A process for cleaning apparatus in which (meth)acrylic acid-containing organic solvents have been treated and/or generated and contain fouling and/or polymer and residues of organic solvent, in...
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6998504 |
Method for the catalytic gas phase oxidation of propene into acrylic acid
A process for the catalytic gas-phase oxidation of propene to acrylic acid, in which the reaction gas starting mixture is oxidized, with a high propene loading, in a first reaction stage, over a...
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EP1484303A2 |
METHOD FOR PRODUCTION OF (METH)ACRYLIC ACID
A method for producing acrylic acid by absorbing acrylic acid at a high ratio and obtaining an acrylic acid-containing solution of high concentration is provided. This method comprises a step of...
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6781017 |
Method for the production of acrolein or acrylic acid or the mixture thereof from propane
In a process for the preparation of acrolein or acrylic acid or a mixture thereof from propane, the propane is subjected, in a first reaction stage, to a partial dehydrogenation under heterogeneous...
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6639106 |
Process for preparing and purifying acrylic acid from propylene having improved capacity
This invention relates to an improved process for preparing acrylic acid from propylene using a tandem reactor and utilizing an increased amount of propylene reactant, thereby providing increased...
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6593506 |
Olefin recovery in a polyolefin production process
Disclosed is a method of recovering olefin from purge streams in a polyolefin production process. The method includes reacting a purge stream containing olefin and impurities with water in the...
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6548701 |
Process for the preparation of 3-(methylthio)propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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6500982 |
Process for preparing (meth) acrylic acid
This invention relates to a process for preparing (meth)acrylic acid, whereby turndown control is utilized to maintain optimal distillation column performance in the dehydration of aqueous...
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6495609 |
Carbon dioxide recovery in an ethylene to ethylene oxide production process
Disclosed is a method for recovering carbon dioxide from an ethylene oxide production process and using the recovered carbon dioxide as a carbon source for methanol synthesis. More specifically,...
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6492548 |
Process for the oxidation of alkanes
Processes are disclosed for the oxidation of alkanes such as, for example, propane, to form unsaturated carboxylic aldehydes and acids such as, for example, acrolein and acrylic acid. The processes...
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6426433 |
Method for producing acrolein and/or acrylic acid from propane
In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to a partial oxydehydrogenation with molecular oxygen under...
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6423875 |
Method for producing acrolein and/or acrylic acid from propane
In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to an oxydehydrogenation with molecular oxygen under homogeneous...
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6388129 |
Method for producing acrolein and/or acrylic acid from propane
In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to a partial oxydehydrogenation with molecular oxygen under...
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6384274 |
Single reactor process for preparing acrylic acid from propylene having improved capacity
This invention relates to an improved process for preparing acrylic acid from propylene using a single reactor utilizing an increased amount of propylene reactant thereby providing increased...
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6350906 |
Continuous recovery of (meth)acrylic acid
A process for the continuous recovery of (meth)acrylic acid from the reaction gases of a catalytic gas-phase oxidation by (I) absorption in a high-boiling solvent, (II) isolation of the...
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6320076 |
Process for the preparation of 3-(methylthio) propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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6187963 |
Processes for the manufacture of acrolein derivatives
Processes are disclosed for the conversion of propylene to an acrolein derivative by converting propylene to acrolein and converting acrolein to the acrolein derivative. The processes utilize...
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6166263 |
Processes for the manufacture of acrolein
Processes are disclosed for the conversion of propylene to acrolein in the presence of propane. The processes utilize oxygen and recycle propane to the acrolein reactor. Process feeds can comprise,...
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6057481 |
Processes for the manufacture of methylmercaptopropanal
Processes are disclosed for the conversion of propylene to methylmercaptopropanal by converting propylene to acrolein and converting acrolein to methylmercaptopropanal. The processes utilize oxygen...
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5981818 |
Integrated cracking and olefins derivative process utilizing dilute olefins
A novel process is provided which integrates the cracking of hydrocarbon containing feedstocks with the olefins purification and olefins derivative process utilizing dilute olefin feedstocks.
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5925794 |
Process for the preparation of 3-(methylthio)propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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5905171 |
Process for the preparation of 3-(methylthio)propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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5825369 |
Compression of simple geometric models using spanning trees
A computer system stores and transmits compressed simple triangular meshes. The computer uses a data structure that represents a simple triangular mesh in n-dimensional space. The data structure...
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5821390 |
Catalytic gas-phase oxidation of propene to acrolein
A gas-phase mixture of propene and oxygen is catalytically oxidized by passing a reactant gas mixture comprising propene and oxygen through a plurality of catalyst containing contact tubes in a...
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5744647 |
Process for the preparation of 3-(methylthio) propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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5739391 |
Catalytic gas-phase oxidation of acrolein to acrylic acid
A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a multiple contact tube fixed-bed reactor through whose space surrounding the contact tubes only one heat-exchange...
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5705684 |
Preparation of acrolein, acrylic acid or a mixture thereof from propane
In a process for preparing acrolein, acrylic acid or a mixture thereof from propane, propane is partially dehydrogenated to propylene in a first stage, the product gas mixture resulting therefrom...
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5684188 |
Continuous heterogeneously catalyzed gas-phase oxidation of propylene to acrolein, acrylic acid or a mixture thereof
In a process for the continuous heterogeneously catalyzed gas-phase oxidation of propylene to acrolein, acrylic acid or a mixture thereof in an oxidation reactor whose feed gas mixture comprises,...
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5637766 |
Process for the preparation of 3-(methylthio) propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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5352837 |
Process for the preparation of 3-(methylthio)propanal
A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium...
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5264625 |
Catalytic gas-phase oxidation of acrolein to acrylic acid
A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a fixed-bed reactor with contacting tubes, at elevated temperature on catalytically active oxides with a conversion of...
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