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7399727 |
Zeolite catalyst and method
A catalyst is formed from a phosphorus-containing ZSM-5-type zeolite. The ZSM-5-type zeolite has a silica/alumina molar ratio of at least 200. The phosphorus-containing ZSM-5-type zeolite also has...
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7368410 |
Zeolite catalyst and method of preparing and use of zeolite catalyst
A zeolite catalyst is prepared by treating a zeolite with a phosphorus compound to form a phosphorus-treated zeolite. The phosphorus-treated zeolite is heated to a temperature of about 300° C. or...
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7304194 |
Hydrothermal treatment of phosphorus-modified zeolite catalysts
A method of treating a ZSM-5-type zeolite catalyst is carried out by treating a ZSM-5 zeolite catalyst having a silica/alumina mole ratio of at least about 200 with a phosphorus compound. The...
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7285511 |
Method of modifying zeolite catalyst
A method of modifying a zeolite catalyst to increase para-xylene selectivity of the zeolite catalyst in toluene methylation reactions is provided. The method includes forming a slurry of a...
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7279608 |
Toluene methylation process with increased methanol selectivity
A method of converting methanol to a xylene product is achieved by providing a reactor containing a non-steamed, phosphorus-treated ZSM-5-type zeolite catalyst. The catalyst is contacted with a...
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7244869 |
Method of aromatic alkylation
A catalyst for use in aromatic alkylation, such as toluene alkylation with methanol, is comprised of a zeolite with pore size from about 5.0 to about 7.0 Å containing a hydrogenating metal. The...
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7196237 |
Method of preparing an alkyl aromatic product
A method of modifying a zeolite catalyst to increase selectivity of the catalyst is achieved by dissolving alumina in a phosphorus-containing acid solution, and treating the zeolite catalyst with...
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7105713 |
Preparation of alkyl-aromatic products
A method of modifying a ZSM-5-type zeolite catalyst to increase selectivity of the catalyst for para-isomers in aromatic alkylation reactions is provided. The method includes contacting a...
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7084318 |
Toluene methylation process
A method of preparing a xylene product is carried out in a reactor containing a phosphorus-treated ZSM-5-type zeolite catalyst. The method includes initiating a unique start-up of a toluene...
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7060864 |
Toluene methylation process
A method of preparing a xylene product is carried out by providing a reactor containing a non-steamed, phosphorus-treated ZSM-5-type zeolite catalyst. The catalyst is contacted with a...
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7060644 |
Aromatic alkylation catalyst and method
A catalyst for use in aromatic alkylation, such as toluene alkylation with methanol, is comprised of a zeolite with pore size from about 5.0 to about 7.0 Å containing a hydrogenating metal. The...
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6943131 |
Selective zeolite catalyst modification
A method of modifying a zeolite catalyst to increase selectivity of the catalyst is achieved by dissolving alumina in a phosphorus-containing acid solution, and treating the zeolite catalyst with...
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5877363 |
Process for concurrent selective hydrogenation of acetylenes and 1,2 butadine in hydrocarbon streams
A process for the removal of vinylacetylene, ethylacetylene and 1,2-butadiene from C 4 aliphatic hydrocarbon streams comprising, concurrently: (1) feeding hydrogen and a hydrocarbon stream...
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5866736 |
Process for the production of alkyl benzene
The benzene content of light reformate is reduced by selectively alkylating the toluene contained therein with olefins by contacting the light reformate with the olefins in a catalyst bed. The...
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5763714 |
Process and apparatus for the production and recovery of p-xylene
A mixed aromatic stream is hydrotreated to remove olefins and fractionated to separate C 9 + heavies in a distillation column reactor and the C 8 and lighter material is fed to a selective...
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5434326 |
Discrete molecular sieve and use in aromatic-olefin alkylation
This invention presents a novel MgAPSO molecular sieve, containing a critical range of magnesium in the sieve framework and having a small crystallite size, which is particularly active for...
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