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7622626 |
Purge gas streams to stagnant zones within oxygenate-to-olefin reactor
The present invention comprises a process for conversion of oxygenates to olefins comprising contacting within a reactor the oxygenates with a catalyst to produce light olefins and wherein the...
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7622625 |
Purge gas streams to stagnant zones within oxygenate-to-olefin reactor
The present invention comprises a process for conversion of oxygenates to olefins comprising contacting within a reactor the oxygenates with a catalyst to produce light olefins and wherein the...
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7622624 |
Crystalline intergrowth material, its synthesis and its use in the conversion of oxygenates to olefins
A silicoaluminophosphate molecular sieve is disclosed that comprises first and second intergrown phases of a CHA framework type and an AEI framework type, wherein said first intergrown phase has an...
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7619128 |
Stabilizing catalyst activity during catalyst regeneration
This invention is directed to methods of converting oxygenates to olefin products. The methods provided include steps for protecting against deactivation of active molecular sieve catalysts during...
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7619127 |
Method of operating a riser reactor
A method for maximizing the contact between solid catalyst particles and a feedstock while minimizing undesirable side reactions is provided. A plurality of feedstock jets are contacted with solid...
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7608746 |
Process for producing propylene
Propylene is prepared by a process for producing propylene, comprising: contacting a reaction mixture of ethylene and methanol and/or dimethyl ether in the presence of a catalyst while controlling...
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7592496 |
Light olefin production via dimethyl ether
Improved processing for the production of light olefins is provided involving synthesis gas conversion to form an effluent including product dimethyl ether, subsequent separation of the product...
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7589244 |
Process for the production of propylene from a feed comprising olefins containing four and/or five carbon atoms with co-production of desulphurized gasoline with a high octane number
For producing propylene and co-producing desulphurized gasoline with a high octane number from a catalytically cracked gasoline cut, and a steam cracking C4/C5 cut, conduct at least one one-step...
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7588739 |
Fixed bed multitube reactor
A fixed-bed multitubular reactor, comprising a plurality of reaction tubes ( 3 ) filled with a catalyst and catalyst temperature measurers ( 4 ) measuring the temperatures of the reaction tubes...
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7576250 |
Cracking 1-ethers over unmodified γ-alumina
1-Ethers may be cracked over untreated γ-alumina having a pore volume of more than 1.0 cc/g and an average pore diameter of more than 150 angstroms (Å) at a temperature from 250 to 350° C. and...
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7550641 |
Methods for recovering activity of molecular sieve catalysts
The invention is directed to a method of rejuvenating silicoaluminophosphate molecular sieve catalyst that has been deactivated hydrothermally as well as a method of using the rejuvenated catalyst...
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7547812 |
Enhancement of molecular sieve performance
A catalyst for converting methanol to light olefins and the process for making and using the catalyst are disclosed and claimed. SAPO-34 is a specific catalyst that benefits from its preparation in...
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7544851 |
Method of synthesizing aluminophosphate and silicoaluminophosphate molecular sieves
In a method of synthesizing an aluminophosphate or silicoaluminophosphate molecular sieve, a synthesis mixture is prepared by mixing a plurality of starting materials including at least a source of...
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7541508 |
Molecular sieve catalyst composition, its making and use in conversion processes
The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst...
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7518026 |
Catalyst and process for the conversion of oxygenates to olefins
A catalyst composition for use in the conversion of oxygenates to olefins comprises a first crystalline silicoaluminophosphate molecular sieve comprising at least one intergrown form of an AEI...
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7511184 |
Molecular sieve catalyst composition, its making and use in conversion processes
The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst...
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7498475 |
Molecular sieve mixtures for olefin formation
Molecular sieve catalysts are combined to provide a catalyst mixture having a beneficial combination of the activities and selectivities of the individual molecular sieves. The molecular sieve...
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7498011 |
Aluminophosphate molecular sieve, its synthesis and use
A large pore (metallo)aluminophosphate molecular sieve is disclosed The material has an X-ray diffraction pattern including the lines listed in Table 4 and is synthesized in the presence of...
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7495142 |
Protecting catalytic sites of metalloaluminophosphate molecular sieves
Metalloaluminophosphate molecular sieves and metalloaluminophosphate molecular sieve catalyst particles are protecting from degradation by water by maintaining said molecular sieves or catalysts in...
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7495141 |
Minimizing corrosion in a methanol-to-olefin effluent processing system
The present invention is directed toward reducing corrosion in a methanol-to-olefin (MTO) effluent processing system, and particularly in the condensate removal system thereof, by injecting a...
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7485766 |
Oxygenate conversion using molecular sieve SSZ-74
The present invention relates to new crystalline molecular sieve SSZ-74 prepared using a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium) dication as a structure directing agent, and its use in...
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7465845 |
Increasing ethylene and/or propylene production in an oxygenate to olefins reaction systems
This invention is directed to a process for converting oxygenate to olefin product at an increased prime olefin selectivity (i.e., increased ethylene and/or propylene content) compared to...
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7459595 |
Processes for lifting spent catalyst into a regenerator in an oxygenate to olefins reaction system
This invention provides processes for transporting catalyst, preferably in an oxygenate to olefins reaction system. In one embodiment, an oxygenate contacts molecular sieve catalyst particles in a...
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7459136 |
Process for manufacture of silicoaluminophosphate molecular sieves
A process for manufacturing a silicoaluminophosphate molecular sieve, the process comprising the steps of: (a) dissolving a silicon source into in a template at conditions sufficient to form a...
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7459073 |
Hydrocarbon conversion using molecular sieve SSZ-47B
The present invention relates to new crystalline molecular sieve SSZ-47B prepared using a N-cyclopentyl-1,4-diazabicyclo[2.2.2] octane cation as a structure-directing agent and an amine too large...
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7453019 |
Conversion process
The invention relates to a conversion process for making olefin(s) using a molecular sieve catalyst composition. More specifically, the invention is directed to a process for converting a feedstock...
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7442845 |
Conversion of ethers to olefins
Ethers are cracked to olefins using a gamma-alumina catalyst in the presence of ammonia. The use of ammonia improves the selectivity to linear alpha olefins in comparison to cracking reactions in...
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7439414 |
Oxygenate conversion catalyst processing
Improved processing of spent catalyst from an oxygenate-containing feedstock to olefins conversion process is realized through the employment of a barrier filter to treat a catalyst...
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7439413 |
Method for the production of isobutene from commericial methyl tert-butly ether
The invention relates to a process for preparing high-purity isobutene from industrial methyl tert-butyl ether (MTBE) and the economical utilization of the secondary streams.
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7435863 |
High silica chabazite, its synthesis and its use in the conversion of oxygenates to olefins
A porous crystalline material is described having the chabazite framework type and having a composition involving the molar relationship:
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7423191 |
Method and system for catalytically converting oxygenates and regenerating and stripping catalyst
A method of converting oxygenate-containing feedstock to light olefins comprises charging a reactor with catalyst, feeding the feedstock into the reactor, contacting the feedstock with the catalyst...
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7414167 |
Conversion of oxygenate to propylene using moving bed technology and a separate heavy olefin interconversion step
The average propylene cycle yield of an oxygenate to propylene (OTP) process using a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a combination of: 1) moving...
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7414166 |
Minimizing catalyst backflow in fluidized bed reactors
This invention provides feed introduction devices, and processes for using same, which minimize catalyst clogging. In particular, the invention is to a feed introduction device having a first end...
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7411106 |
Molecular sieve compositions, catalyst thereof, their making and use in conversion processes
The invention relates to a catalyst composition, a method of making the same and its use in the conversion of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably...
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7408092 |
Selective conversion of oxygenate to propylene using moving bed technology and a hydrothermally stabilized dual-function catalyst
The average propylene cycle selectivity of an oxygenate to propylene (OTP) process using a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a combination of: 1)...
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7405337 |
Conversion of oxygenate to propylene with selective hydrogen treatment of heavy olefin recycle stream
The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed or moving beds of a dual-function oxygenate conversion catalyst with recycle of one or...
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7399891 |
Process for alcohol production by selective ether decomposition
This invention relates to a process for the production of an alcohol, the process comprising (a) reacting an olefin and water in the presence of a catalyst under conditions sufficient to form a...
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7396972 |
Methanol feed for producing olefin streams
A method for producing an olefin stream is provided based on conversion of an initial natural gas stream into a synthesis gas. The resulting synthesis gas is enriched with CO 2 previously...
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7396971 |
Two stage hydrocarbon conversion reaction system
This invention is to a method and system for operating a hydrocarbon conversion process. A two stage reactor system is used in which the gas superficial velocity of the second reaction stage is...
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7393990 |
Production of light olefins from oxygenate using framework gallium-containing medium pore molecular sieve
A method is provided for converting oxygenates, e.g., methanol, to olefins, e.g., ethylene and propylene, comprising contacting said oxygenates and an aromatics co-feed, e.g., xylenes, with a...
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7385100 |
Treating oxygenate containing feedstreams in the conversion of oxygenates to olefins
This invention is directed to removing contaminants from an oxygenate-containing feedstream for an oxygenate to olefin reaction system. Oxygenate feeds used in the conversion of oxygenates to...
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7385099 |
Multiple riser reactor with centralized catalyst return
The present invention is directed to a hydrocarbon conversion apparatus and process. The apparatus comprises the following: a plurality of riser reactors, each having a first end into which a...
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7378563 |
Molecular sieve compositions, catalysts thereof, their making and use in conversion processes
The invention relates to a conversion process of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably ethylene and/or propylene, in the presence of a molecular...
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7375050 |
Synthesis and use of aluminophosphates and silicoaluminophosphates
Disclosed are methods and compositions of synthesis mixtures for the synthesis of aluminophosphates and silicoaluminophosphate molecular sieves, which enable the control and adjustment of the...
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7371916 |
Conversion of an alcoholic oxygenate to propylene using moving bed technology and an etherification step
The average propylene selectivity per on-stream cycle of an alcoholic oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is...
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7361799 |
Process for producing olefins
A process is described for producing olefins from a vapor product stream from an oxygenate to olefin conversion reaction, the vapor product stream comprising C 2 to C 4 olefins, C 5 +...
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7358412 |
Method of making molecular sieve catalyst
Disclosed is a method for making molecular sieve catalyst particles. Dried molecular sieve catalyst particles are used to make the catalyst. The dried molecular sieve catalyst particles are put...
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7355086 |
Method for stabilizing catalyst activity during MTO unit operation
A method for maintaining the activity of silicoaluminophosphate (SAPO) molecular sieve catalyst particles during oxygenate to olefin conversion reactions. After regeneration of SAPO catalyst...
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7351871 |
Processes for producing poly-alpha-olefins, and poly-alpha-olefins produced thereby
Process for producing poly-α-olefins are described wherein the processes comprise: (a) providing a primary alcohol; and (b) polymerizing the primary alcohol in the presence of an acidic alumino...
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7345213 |
Protecting catalytic activity of a SAPO molecular sieve
This invention is directed to a method of making an olefin product from an oxygenate feedstock and a method of protecting catalytic activity of a silicoaluminophosphate molecular sieve. The methods...
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