Iron sulfide dissolver
AssigneeSaudi Arabian Oil Company
InventorsHarry Daniel Oduro, Mohammed Khaldi
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Abstract
An aqueous iron sulfide dissolver including zinc, chromium, a methoxybenzoic acid, formic acid, acetic acid, and hydrochloric acid. The iron sulfide dissolver is made by combining these components, and dissolves compounds including iron sulfide upon contact. Evolved hydrogen sulfide reacts with the methoxybenzoic acid to yield solubilized methanethiol as an intermediate product, which is further oxidized to yield dissolved dimethyl disulfide.
Claims20
An aqueous iron sulfide dissolver comprising:
- zinc;
- chromium;
- a methoxybenzoic acid, wherein “methoxybenzoic acid” refers to the methoxybenzoic acid and its conjugate base;
- formic acid, wherein “formic acid” refers to formic acid and its conjugate base;
- acetic acid, wherein “acetic acid” refers to acetic acid and its conjugate base;
- and
- hydrochloric acid, wherein “hydrochloric acid” refers to hydrochloric acid and its conjugate base.
A method of making an aqueous iron sulfide dissolver for dissolving iron sulfides, the method comprising:
- combining zinc, chromium, a methoxybenzoic acid, formic acid, acetic acid, and hydrochloric acid to yield the aqueous iron sulfide dissolver.
A method of dissolving an iron sulfide, the method comprising:
- contacting an iron sulfide with an aqueous iron sulfide dissolver comprising zinc, chromium, a methoxybenzoic acid, formic acid, acetic acid, and hydrochloric acid to dissolve the iron sulfide;
- reacting evolved hydrogen sulfide with the methoxybenzoic acid to yield methanethiol;
- and
- dimerizing the methanethiol to yield dimethyl disulfide in solution.
Dependencies are inferred from the claim text.