Controlling tar by quenching cracked effluent from a liquid fed gas cracker
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United States of America Patent
Stats
-
Sep 27, 2011
Grant Date -
Nov 12, 2009
app pub date -
Jul 20, 2009
filing date -
Dec 5, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a system for thermal cracking gaseous feedstocks, the system including a gas cracker for producing an effluent comprising olefins, at least one transfer line exchanger for the recovery of process energy from the effluent and a water quench tower system, a process for extending the range of system feedstocks to include liquid feedstocks that yield tar is provided. The process includes the steps of injecting a first quench fluid downstream of a primary transfer line exchanger to quench the process effluent comprising olefins, separating in a first separation vessel a cracked product and a first byproduct stream comprising tar from the quenched effluent, directing the separated cracked product to a water quench tower system and quenching the separated cracked product with a second quench fluid to produce a cracked gas effluent for recovery and a second byproduct stream comprising tar. An apparatus for carrying out such process is also provided.
First Claim
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