An effective novel polymeric additive for inhibiting...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 8/14 (2006.01) C08F 8/40 (2006.01) C10G 7/10 (2006.01)

Patent

CA 2734384

The present invention relates to the field of inhibition of metal corrosion in hot acidic hydrocarbons, wherein acidity is derived from presence of naphthenic acid. More particularly, it relates to a polymeric additive for inhibiting high temperature napthenic acid corrosion, wherein said polymeric additive is polymeric phosphate ester of polyisobutylene succinate ester or oxide derivative of polymeric phosphate ester of polyisobutylene succinate ester. A polymeric phosphate ester of polyisobutylene succinate ester which is capable of acting as naphthenic acid corrosion inhibitor by inhibiting naphthenic acid corrosion in crude oil/feedstock/hydrocarbon streams containing naphthenic acid, and demonstrating higher thermal stability at elevated temperature varying from about 200°C to about 400°C [about 400°F to about 750°F] is disclosed

La présente invention porte sur le domaine de l'inhibition de la corrosion du métal dans des hydrocarbures acides chauds, l'acidité étant due à la présence d'acide naphténique. Plus particulièrement, l'invention porte sur un additif polymère pour inhiber la corrosion par l'acide naphténique à température élevée, ledit additif polymère étant un ester de phosphate polymère d'ester de succinate de polyisobutylène ou un dérivé oxyde d'ester de phosphate polymère d'ester de succinate de polyisobutylène. L'invention porte sur un ester de phosphate polymère d'ester de succinate de polyisobutylène qui est apte à servir d'inhibiteur de la corrosion par lacide naphténique en inhibant la corrosion par l'acide naphténique dans des courants de pétrole brut/de charge d'alimentation/d'hydrocarbure contenant de l'acide naphténique, et en faisant preuve dune stabilité thermique supérieure à une température élevée variant d'environ 200 °C à environ 400 °C [environ 400°F à environ 750°F].

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