Operation of Modified HF Alkylation Unit
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United States of America Patent
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Issued Date -
Nov 19, 2015
app pub date -
May 15, 2014
filing date -
May 15, 2014
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Abstract
An HF alkylation process for producing gasoline boiling range alkylate product by the alkylation in an HF alkylation unit of a light olefin reactant with an isoparaffin reactant in the presence of a hydrogen fluoride/sulfolane alkylation catalyst mixture in which fresh sulfolane feed having a Total Acid Number (TAN, ASTM D974) not more than 2 mq./L and optimally not more than 1 meq./L. is added to the hydrogen fluoride/sulfolane alkylation catalyst circulating in the unit. Control over the acidic components of the sulfolane feed is appropriately maintained by monitoring and pretreatment with an ion exchange resin to remove acidic components from the feed.
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