F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 1/00 (2006.01) C07C 7/20 (2006.01) C10G 70/04 (2006.01) C10G 70/06 (2006.01) F25J 3/02 (2006.01)
Patent
CA 2353397
A system and process for the recovery of ethylene and propylene from a gas stream, such as a refinery offgas stream. The process comprises withdrawing, cooling, and recovering an overhead vapor stream from a single distillation column (20). The process includes withdrawing a liquid C3+, C4+, C5+ or C6+ bottoms product stream (4) and recycling (5) a portion of the bottoms stream (4) to maintain an overhead column condenser (28) at temperature refrigeration levels of above - 140 °F and withdrawing a vapor side stream rich in propylene or ethylene-propylene.
La présente invention concerne un système et un procédé de récupération d'éthylène et de propylène dans un flux gazeux, par exemple un flux de gaz résiduel de raffinerie. Le procédé consiste à extraire, à refroidir et à récupérer un flux vapeur de tête sur une colonne de distillation unique. Il s'agit notamment d'extraire un flux de produits de fond de C3+, C4+, C5+ ou C6+ et d'en recycler une partie de manière à maintenir un condenseur de tête de colonne à des température de refroidissement supérieures à140 DEG F et à extraire un flux de vapeur riche en propylène ou en éthylène-propylène.
Chart Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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