Petroleum bioprocessing to prevent refinery corrosion

Details Petroleum bioprocessing to prevent refinery corrosion Petroleum bioprocessing to prevent refinery corrosion

C - Chemistry, Metallurgy

10

G

C10G 75/00 (2006.01) C10G 31/00 (2006.01)

Patent

CA 2755630

The present invention relates to the bioupgrading of crude oil is directed to a process for decreasing the acidity of an acidic crude oil, comprising contacting an acidic crude oil with a mixture nitrogen containing compounds selected from the group comprising ammonia, ammonia hydroxide, amines and the salts thereof, and in the pres-ence of lipase enzyme, under conditions of suitable temperature and pressure sufficient to form the corresponding amide. The resulting naphthenic acid derived amides can then be processed normally in a refinery using such processes as cracking or hydrotreat-ing and converted to hydrocarbon, ammonia and carbon dioxide without causing dam- age to the refinery infrastructure. This enzyme process is done at reduced temperatures (40-60°C) and pressures requiring less energy.

La présente invention concerne la valorisation biologique de pétrole brut et porte sur un procédé pour la diminution de l'acidité d'un pétrole brut acide, comprenant la mise en contact d'un pétrole brut acide avec un mélange de composés contenant de l'azote choisis dans le groupe comprenant l'ammoniac, l'ammoniaque, les amines et les sels de celles-ci, et en présence d'une enzyme de type lipase, dans des conditions de température et de pression appropriées suffisantes pour former l'amide correspondant. Les amides issus d'acide naphténique ainsi obtenus peuvent ensuite être traités normalement dans une raffinerie à l'aide de procédés tels que le craquage ou l'hydrotraitement et convertis en hydrocarbure, ammoniac et dioxyde de carbone sans provoquer d'endommagement sur l'infrastructure de la raffinerie. Ce procédé enzymatique est effectué à des températures réduites (40 60 °C) et des pressions nécessitant moins d'énergie.

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