Removal of sulfides using chlorite and an amphoteric ammonium betaine
AssigneeBP Chemicals Limites
InventorMark R. Howson
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Abstract
This invention relates to a composition suitable for use in process for the removal of sulfides, especially hydrogen sulfide from a feed contaminated therewith. The composition comprises an aqueous solution of a chlorite and a corrosion inhibitor which is an amphoteric ammonium compound of the formula ##STR1## as herein defined. The inhibitor mitigates problems of corrosion associated with chlorite scavengers.
Claims10
A composition suitable for use as a sulfide scavenger, said composition comprising an aqueous solution of a chlorite and a corrosion inhibitor, characterized in that the corrosion inhibitor is an amphoteric compound of the formula:
- ##STR3## wherein each of R.sub.1, R.sub.2 and R.sub.3 is the same or different group selected from H, C.sub.1 -C.sub.24 alkyl, aryl, halogen, hydroxy, alkoxy, carbonylic and heterocyclic group formed by a combination of at least two of R.sub.1, R.sub.2 and R.sub.3 and the nitrogen atom, said heterocyclic group optionally containing additional heteroatoms, R.sub.4 is a carboxylic or a sulphonic acid group, and n has a value from 1-9.
Dependencies are inferred from the claim text.