Offgas Stream Direct Contact Condenser
AssigneeFina Technology, Inc.
InventorsVincent A. Welch, James R. Butler
Life of this patent
Estimating the term…
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.
Claims35
1-10. (canceled)
A method for the dehydrogenation of hydrocarbons comprising:
- contacting a hydrocarbon feedstock with a dehydrogenation catalyst within a reactor under reaction conditions effective to dehydrogenate at least a portion of said hydrocarbon feedstock in a dehydrogenation reaction;
- removing an offgas stream that comprises hydrogen from the reactor;
- providing a direct contact condenser capable of circulating a cooling medium and contacting the offgas stream with the cooling medium;
- cooling the offgas stream in the direct contact condenser to enable the condensation of compounds from the offgas stream;
- removing from the direct contact condenser a cooled offgas stream having a reduced content of condensable compounds as compared to the offgas stream prior to contact with the cooling medium.
A method for removing aromatics and steam from a dehydrogenation reactor offgas, comprising:
- feeding an offgas stream into a direct contact condenser;
- contacting the offgas stream with a cooling medium;
- condensing organic compounds and steam from the offgas stream;
- removing condensed organic compounds and steam from the direct contact condenser;
- and
- removing noncondensable vapors from the direct contact condenser.
Dependencies are inferred from the claim text.