January 2002

Letters to the Editor

Letters to the editor

Main fractionators I recently read the article, "Do we need relief valves on FCC main fractionators?" (Hydrocarbon Processing, Oct., pp. 53 - 56). Although Mr. Elliot did a good job ..

Main fractionators I recently read the article, "Do we need relief valves on FCC main fractionators?" (Hydrocarbon Processing, Oct., pp. 53 - 56). Although Mr. Elliot did a good job presenting the information, he neglected one important point. The reactor and main fractionator are almost always in open communication with each other. Therefore, the relief valves normally found on the overhead line from a main fractionator protect both the main fractionator and reactor. In my experience, the "weakest link" for this system is the reactor. Maximum pressure, which can be generated by the converter section, should not be com

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