Ethylene maximization with propylene metathesis

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United States of America Patent

PATENT NO 11565985
APP PUB NO 20210147318A1
SERIAL NO

17100683

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Abstract

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Systems and processes herein improve the conversion of propylene to ethylene via metathesis. On a mass basis, embodiments herein may be used to convert greater than 40% propylene, on a mass basis, to ethylene, such as 43% to 75%, on a mass basis. In one aspect, processes for the conversion of propylene to ethylene herein may include introducing a propylene feed stream to a metathesis reactor, and contacting the propylene with a metathesis catalyst in the metathesis reactor to convert the propylene to ethylene and 2-butene. An effluent from the metathesis reactor may be recovered, the effluent including ethylene, 2-butene, and unconverted propylene. The effluent may then be separated in a fractionation system to recover an ethylene fraction, a propylene fraction, a c4 fraction, and a C5+ fraction. The propylene fraction and the C4 fraction may then be fed to the metathesis reactor to produce additional ethylene.

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Patent Owner(s)

  • LUMMUS TECHNOLOGY LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ramachandran, Bala Easton, US 42 648

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