Method for Quenching Paraffin Dehydrogenation Reaction in Counter-Current Reactor
AssigneeUop LLC
InventorsWolfgang A. Spieker, Laura E. Leonard, David N. Myers
Life of this patent
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Abstract
A process is presented for quenching a process stream in a paraffin dehydrogenation process. The process comprises cooling a propane dehydrogenation stream during the hot residence time after the process stream leaves the catalytic bed reactor section. The process includes cooling and compressing the product stream, taking a portion of the product stream and passing the portion of the product stream to the mix with the process stream as it leaves the catalytic bed reactor section.
Claims20
A process for controlling temperatures in a dehydrogenation reactor, comprising:
- passing a catalyst to a dehydrogenation reactor, such that the catalyst flows down through the reactor;
- passing a paraffin rich stream to the dehydrogenation reactor such that the paraffin rich stream flows up through the reactor, thereby creating a process stream comprising catalyst and dehydrogenated hydrocarbons and some unconverted paraffins;
- separating the vapor phase from the process stream thereby creating a product stream;
- passing the product stream to a cooling unit, thereby creating a cooled product stream;
- and
- passing a portion of the cooled product stream to the process stream.
A process for controlling temperatures in a dehydrogenation reactor, comprising:
- passing a catalyst to a dehydrogenation reactor through at least one catalyst inlet port;
- passing a propane rich stream to the dehydrogenation reactor through a distributor at the bottom of the reactor, thereby creating a process stream comprising catalyst and dehydrogenated hydrocarbons;
- separating the catalyst from the process stream thereby creating a product stream, comprising light olefins;
- cooling the product stream in a cooling unit, thereby creating a cooled product stream;
- and
- passing a portion of the cooled product stream to the process stream to a position above the catalyst inlet port.
A process for controlling temperatures in a dehydrogenation reactor, comprising:
- passing a catalyst to a dehydrogenation reactor through at least one catalyst inlet port, wherein the dehydrogenation reactor has a lower reactor section for contacting catalyst with a feedstream and an upper section for separation of catalyst from a process stream;
- passing a paraffin rich stream to the dehydrogenation reactor through an inlet distribution system at the bottom of the reactor;
- contacting the catalyst and the paraffin rich stream in a counter-current flow system with the catalyst flowing downward through the reactor and the paraffin rich stream flowing upward through the reactor, thereby creating a process stream separating the catalyst from the process stream thereby creating a product stream, comprising olefins;
- passing the product stream to a cooling unit, thereby creating a cooled product stream;
- and
- passing a portion of the cooled product stream to the process stream.
Dependencies are inferred from the claim text.