Methanol to olefin (MTO) process
AssigneeTopsoe A/S
InventorPablo Beato
Life of this patent
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Abstract
A process for producing an olefin stream, said process comprising passing a feedstock stream comprising oxygenates over catalyst comprises a zeolite with a framework having a 10-ring pore structure, in which said 10-ring pore structure comprises a unidimensional (1-D) pore structure, such as *MRE, at a pressure of 1-25 bar and a temperature of 240-360° C. The olefin stream may be converted to jet fuel, particularly sustainable aviation fuel (SAF) by further oligomerization and hydrogenation.
Claims24
A process for producing an olefin stream, said process comprising:
- passing a feedstock stream comprising oxygenates over a catalyst active in the conversion of oxygenates, in which the catalyst comprises a zeolite with a framework having a 10-ring pore structure that is a unidimensional (1-D) pore structure, at a pressure of 1-25 bar and a temperature of 240-360° C. to produce an effluent stream comprising olefins and water;
- and
- removing water from the effluent stream to obtain the olefin stream,
- wherein said 1-D pore structure is any of *MRE (ZSM-48), MTT (ZSM-23), TON (ZSM-22), or combinations thereof,
- wherein the feedstock stream comprises a diluent and methanol, wherein a methanol concentration in the feedstock stream is 2-20 vol. %,
- wherein the olefin stream is essentially free of aromatics by comprising less than 5 wt % aromatics, wherein the olefin stream comprises 50 wt % or greater of C3-C8 olefins and 1 wt % or less of ethylene, and
- wherein the process further comprises recycling a portion of an olefin-containing stream to the feedstock stream.
A process for producing an olefin stream, said process comprising:
- passing a feedstock stream comprising oxygenates over a catalyst active in the conversion of oxygenates, in which the catalyst comprises a zeolite with a framework having a 10-ring pore structure that is a unidimensional (1-D) pore structure, at a pressure of 1-25 bar and a temperature of 240-360° C. to produce an effluent stream comprising olefins and water;
- and
- removing water from the effluent stream to obtain the olefin stream;
- and
- wherein said 1-D pore structure is any of *MRE (ZSM-48), MTT (ZSM-23), TON (ZSM-22), or combinations thereof, and
- wherein the feedstock stream comprises a diluent and methanol, wherein a methanol concentration in the feedstock stream is 2-20 vol. %, and
- wherein the process further comprises separating from the olefin stream an isoparaffin stream.
A process for producing an olefin stream, said process comprising:
- passing a feedstock stream comprising oxygenates over a catalyst active in the conversion of oxygenates, in which the catalyst comprises a zeolite with a framework having a 10-ring pore structure that is a unidimensional (1-D) pore structure, at a pressure of 1-25 bar, and a temperature of 240-360° C. to produce an effluent stream comprising olefins and water;
- and
- removing water from the effluent stream to obtain the olefin stream,
- wherein said 1-D pore structure is any of *MRE (ZSM-48), MTT (ZSM-23), TON (ZSM-22), or combinations thereof,
- wherein the olefin stream is essentially free of aromatics by comprising less than 5 wt % aromatics, wherein the olefin stream comprises 50 wt % or greater of C3-C8 olefins and 1 wt % or less of ethylene, and
- wherein the process further comprises recycling a portion of an olefin-containing stream to the feedstock stream.
Dependencies are inferred from the claim text.