High temperature naphthenic acid corrosion inhibition using organophosphorous sulphur compounds and combinations thereof

摘要

The present invention relates to the field of processing hydrocarbons which causes corrosion in the metal surfaces of processing units. The invention addresses the technical problem of high temperature naphthenic acid corrosion and sulphur corrosion and provides a solution to inhibit these types of corrosion. The composition formed by reacting high reactive polyisobutylene (HRPIB) with phosphorous pentasulphide in presence of catalytic amount of sulphur provides high corrosion inhibition efficiency in case of high temperature naphthenic acid corrosion inhibition and sulphur corrosion inhibition. The invention is useful in all hydrocarbon processing units, such as, refineries, distillation columns and other petrochemical industries.

主权项

1. A naphthenic acid corrosion inhibiting composition comprising olefin phosphorous sulphur compound, wherein the composition is produced by reacting olefin with phosphorous pentasulphide to form a reaction mixture comprising said olefin phosphorous sulphur compound, wherein the molar ratio of said olefin to said phosphorous pentasulphide is between 1:0.05 to 1:1.5, and
wherein said reaction of the olefin with the phosphorous pentasulphide is carried out in multi-step heating and in presence of catalytic amount of sulphur, and under nitrogen gas purging, and thereby resulting into said composition.