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US 6,281,328 B1Granted
Process for extraction of naphthenic acids from crudes
AssigneeExxonMobil Research and Engineering Company
InventorsGuido Sartori, David William Savage, Bruce Henry Ballinger, David Craig Dalrymple
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Abstract
The invention relates to processes for treating acidic crudes or fractions thereof to reduce or eliminate their acidity by addition of effective amounts of crosslinked polymeric amines having a pKa of greater than 9 such as polyvinyl amine and anionic exchange resins having amino groups. The process has utility for crude processing.
Claims9
A method for decreasing the acidity of an acidic crude oil, comprising:
- contacting a starting acid-containing crude oil or fraction having a neutralization number of from 0.2 to 10 mg KOH/g with an effective amount of a crosslinked polymeric amine having pKa greater than 9 and selected from the group consisting of polyvinylamine and anion-exchange resins containing amino groups, and wherein the molar ratio of amine groups in the crosslinked polymeric amine to acid groups is from 0.1 to 20 to produce a treated crude oil having a decreased acid content and a crosslinked polymeric amine having acid groups attached thereto, recovering the crosslinked polymeric amine with acid groups attached and regenerating the crosslinked polymeric amine to recover the acids.
Dependencies are inferred from the claim text.