DANBURY, Conn.--(BUSINESS WIRE)--Praxair, Inc. (NYSE:PX) has signed a long-term agreement with Delaware City Refining Company in which Praxair will purchase crude carbon dioxide from the refinery. Praxair will build, own and operate a 450-ton-per-day carbon dioxide purification and liquefaction plant at the refinery, producing beverage-quality liquid carbon dioxide for distribution into the Northeastern U.S. merchant market. Praxair already supplies Delaware City Refining with nitrogen for its
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