Processes for separating an MTO effluent
OwnerChristopher Schindlbeck, John J. Senetar +1inventors
InventorsChristopher Schindlbeck, John J. Senetar, Joseph A. Montalbano
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Abstract
A process is presented for removing the fouling problems associated with the product recovery in a methanol to olefins conversion process. The process includes passing the quenched MTO process stream to a product separator, wherein an intermediate stream is generated and includes water and heavier hydrocarbons. The intermediate stream is processed to remove the buildup of heavier hydrocarbons.
Claims20
A process for separating heavy hydrocarbons from an MTO reactor effluent, the process comprising:
- separating an effluent from an MTO reaction zone in a product separation zone into a vapor stream comprising olefinic hydrocarbons, oxygenates, and steam, and a first liquid stream comprising two phases, a first phase comprising water and a second phase comprising heavy hydrocarbons;
- compressing the vapor stream in a compression zone having a plurality of stages of compression and being configured to provide at least one compressed liquid stream and a compressed vapor stream, each compressed liquid stream comprising two phases, a first phase comprising water and a second phase comprising heavy hydrocarbons;
- and,
- separating the first liquid stream from the product separation zone and the at least one compressed liquid stream from the compression zone in a separation vessel into a hydrocarbon liquid stream and a lean hydrocarbon water stream.
A process for separating heavy hydrocarbons from an MTO reactor effluent, the process comprising:
- passing an effluent from an MTO reaction zone to a product separation zone configured to separate the effluent into a vapor stream comprising olefinic hydrocarbons, oxygenates, and steam and a liquid stream;
- passing the liquid stream to a separation vessel;
- passing the vapor stream to a compression zone configured to compress the vapor stream and provide at least two aqueous streams and a compressed vapor stream, each aqueous stream comprising two phases, a first phase comprising water and a second phase comprising heavy hydrocarbons, wherein the compression zone comprises a plurality of stages of compression;
- passing the at least two aqueous streams to the separation vessel;
- recovering a hydrocarbon liquid stream from the separation vessel;
- and,
- passing a lean hydrocarbon water stream from the separation vessel to a water wash zone configured to recover oxygenates from the water stream and provide a liquid hydrocarbon stream comprising heavy olefins and a recycle water stream.
Dependencies are inferred from the claim text.