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US 9,650,317 B2Granted
Offgas stream direct contact condenser
AssigneeFina Technology, Inc.
InventorsVincent A. Welch, James R. Butler
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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.
Claims17
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, wherein the direct contact condenser circulates a cooling medium and contacts 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;
- and
- compressing the cooled offgas stream in an offgas compressor, wherein the offgas compressor maintains the pressure within the reactor.
4 more elements
Dependencies are inferred from the claim text.