Process for reducing total acid number of crude oil

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 31/06 (2006.01)

Patent

CA 2338623

The instant invention is directed to a process for reducing organic acids in petroleum feeds containing organic acids comprising: (a) thermally treating a petroleum feed containing organic acids in a thermal reaction zone comprising a plurality of stages in series, at a temperature and pressure sufficient to decompose at least a portion of said organic acids while sweeping said plurality of stages with an inert gas, to produce a volatile organic acid containing hydrocarbon fraction and a non-volatile hydrocarbon fraction; (b) treating said volatile hydrocarbon fraction to neutralize at least a portion of said organic acids therein and to produce a treated volatile hydrocarbon fraction; (c) collecting said non-volatile hydrocarbon fraction from said thermal reaction zone; and (d) blending said treated volatile hydrocarbon fraction of step (b) with said collected non-volatile hydrocarbon fraction.

L'invention concerne un procédé permettant de réduire la quantité d'acides organiques dans du pétrole d'alimentation contenant des acides organiques. Ce procédé consiste: (a) à traiter thermiquement une dose de pétrole d'alimentation contenant des acides organiques dans une zone de réaction thermique comprenant une pluralité d'étages en série, à une température et une pression suffisantes pour décomposer au moins une partie des acides organiques tout en balayant cette pluralité d'étages avec un gaz inerte, de façon à produire un acide organique volatil contenant une fraction d'hydrocarbure volatile et une fraction d'hydrocarbure non volatile; (b) à traiter la fraction d'hydrocarbure volatile afin de neutraliser au moins une partie des acides organiques s'y trouvant et de produire une fraction d'hydrocarbure volatile traitée; (c) à récupérer dans la zone de réaction thermique la fraction d'hydrocarbure non volatile; et (d) à fusionner la fraction d'hydrocarbure volatile traitée de l'étape (b) avec la fraction d'hydrocarbure non récupérée.

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