Alkali metal hydroprocessing of heavy oils with enhanced removal of coke products
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United States of America Patent
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Nov 25, 2014
Grant Date -
Jun 27, 2013
app pub date -
Dec 4, 2012
filing date -
Dec 7, 2011
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Abstract
Hydrocarbon feedstreams are desulfurized using an alkali metal reagent, optionally in the presence of hydrogen. Improved control over reaction conditions can be achieved in part by controlling the particle size of the alkali metal salt and by using multiple desulfurization reactors. The processes herein allow a simple and effective method for removing the majority of coke formed in the alkali metal reagent reactions with the hydrocarbon feedstreams. This makes it cost effective to run such processes at higher severities (which result in higher coke production) thereby resulting in increased amounts of valuable converted hydrocarbon product yields. The process improvements herein may also be used to increase total throughput through a unit due to the ability to effectively manage higher coke content in the reaction products.
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