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US 10,252,957 B2Granted
Offgas stream direct contact condenser
AssigneeFina Technology, Inc.
InventorsVincent A Welch, James R Butler
Life of this patent
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Abstract
Methods and systems for the dehydrogenation of hydrocarbons include a direct contact condenser to remove compounds from an offgas process stream. The reduction of compounds can decrease duty on the offgas compressor by removing steam and aromatics from the offgas. The dehydrogenation reaction system can be applicable for reactions such as the dehydrogenation of ethylbenzene to produce styrene, the dehydrogenation of isoamiline to produce isoprene, or the dehydrogenation of n-pentene to produce piperylene.
Claims10
A method for removing aromatics and steam from a dehydrogenation reactor offgas, comprising:
- feeding a dehydrogenation offgas stream comprising styrene and steam from an ethylbenzene reaction system for production of styrene into a direct contact condenser;
- contacting the offgas stream with a cooling medium comprising chilled water and ethylbenzene;
- condensing organic compounds including styrene and steam from the offgas stream to form condensed organic compounds and water;
- removing the condensed organic compounds and water from the direct contact condenser;
- removing noncondensable vapors from the direct contact condenser;
- and
- sending the noncondensable vapors to an offgas compressor to compress the noncondensable vapors.
4 more elements
Dependencies are inferred from the claim text.