A new additive for inhibiting acid corrosion and method of...

C - Chemistry – Metallurgy – 23 – F

Patent

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Details

C23F 15/00 (2006.01) C10G 7/10 (2006.01) C10G 9/16 (2006.01) C10G 75/02 (2006.01) C10L 1/14 (2006.01) C10L 1/26 (2006.01) C10L 10/04 (2006.01)

Patent

CA 2736863

The present invention relates to the field of corrosion inhibition in hydrocarbon fluid processing units. The present invention comprises a new additive for inhibiting acid corrosion comprising polymeric thiophosphate ester, which is obtained by reaction of a polymer compound having mono, di or poly hydroxyl group, preferably polymer compound which is hydroxyl - termination, more preferably said polymer compound comprising hydroxyl - terminated polyisobutylene or polybutene and phosphorous pentasulphide. Said polymeric thiophosphate ester is further reacted with any oxide selected from group consisting of ethylene oxide, butylenes oxide or propylene oxide or such other oxide, preferably ethylene oxide, capably forming ethylene oxide derivative of thiophosphate ester. The invention is useful effecting acid corrosion inhibition on the metal surfaces of a distillation unit, distillation column, trays, packing and pump around piping.

La présente invention concerne le domaine de l'inhibition de la corrosion dans des unités de traitement de fluides hydrocarbonés. La présente invention comprend un nouvel additif pour l'inhibition de la corrosion par les acides comprenant un ester de thiophosphate polymère, qui est obtenu par réaction d'un composé polymère ayant un groupe mono, di ou polyhydroxyle, de préférence un composé polymère qui est terminé par hydroxyle, et mieux encore ledit composé polymère comprenant du polyisobutylène ou polybutène terminé par hydroxyle, et de pentasulfure de phosphore. Ledit ester de thiophosphate polymère est encore amené à réagir avec n'importe quel oxyde choisi dans le groupe constitué par l'oxyde d'éthylène, l'oxyde de butylènes ou l'oxyde de propylène ou d'autres oxydes similaires, de préférence l'oxyde d'éthylène, qui peut efficacement former un dérivé d'oxyde d'éthylène de l'ester de thiophosphate. L'invention est utile pour effectuer l'inhibition de la corrosion par les acides sur les surfaces métalliques d'une unité de distillation, d'une colonne de distillation, de plateaux, d'un garnissage et d'une pompe autour d'une canalisation.

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