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US 2015/0148575 A1Published application
Increased conversion of recycled oxygenates in mto
AssigneeUop LLC
InventorsJohn J. Senetar, Daniel A. Kauff, Andrea G. Bozzano
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Abstract
A process is presented for increasing the conversion efficiency of oxygenates to olefins. The conversion of oxygenates recycles unconverted oxygenates and oxygenate by-products to a second reactor unit. The present of oxygenate by-products decreases the efficiency of the methanol to olefins reaction, and passing recycled oxygenates to a second reactor unit maintains the methanol to olefins conversion efficiency while converting the by-products in a secondary zone.
Claims20
A process for generating olefins, comprising:
- passing an oxygenate to a methanol to olefins reactor comprising a fluidized reactor bed with an MTO catalyst to generate a reactor outlet stream comprising olefins and catalyst;
- separating the reactor outlet stream into a reaction effluent stream comprising olefins and a catalyst stream;
- passing the catalyst stream to a second reaction unit;
- passing the reaction effluent stream to a effluent stream separation unit to generate an olefins rich stream and an oxygenate rich stream;
- and
- passing the oxygenate rich stream to the second reaction unit.
3 more elements
A process for generating olefins comprising:
- passing an oxygenate to a methanol to olefins (MTO) reactor comprising a fluidized reactor bed with an MTO catalyst to generate a reactor outlet stream comprising olefins and catalyst;
- passing the reactor outlet stream into a first catalyst separation unit to generate a reaction effluent stream comprising olefins and oxygenates, and a catalyst stream;
- passing the catalyst stream to a regeneration unit to generate a regenerated catalyst stream;
- passing the reaction effluent stream to a effluent stream separation unit to generate an olefins rich stream and an oxygenate rich stream;
- passing the oxygenate rich stream to a second reactor using a portion of the regenerated catalyst stream to generate a second reactor process stream;
- and
- passing the second reactor process stream to a second catalyst separation unit.
4 more elements
A process for generating olefins comprising:
- passing an oxygenate to a methanol to olefins (MTO) reactor comprising a fluidized reactor bed with an MTO catalyst to generate a reactor outlet stream comprising olefins and catalyst;
- passing the reactor outlet stream into a first catalyst separation unit to generate a reaction effluent stream comprising olefins and oxygenates, and a spent catalyst stream;
- passing a portion of the spent catalyst stream to a second reactor;
- passing the reaction effluent stream to an effluent stream separation unit to generate an olefins rich stream and an oxygenate rich stream;
- passing the oxygenate rich stream to the second reactor using a portion of the spent catalyst stream to generate a second reactor process stream;
- and
- passing the second reactor effluent to a second catalyst separation unit to generate a second reactor effluent stream comprising olefins and a second reactor catalyst stream.
4 more elements
Dependencies are inferred from the claim text.