Method for removing iron sulfide scale from metal surfaces

Details Method for removing iron sulfide scale from metal surfaces Method for removing iron sulfide scale from metal surfaces

1982-08-05

1983-05-03

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 41, 252142, 252146, C23G 108

Patent

active

043819508

ABSTRACT:
A process for reducing hydrogen sulfide gas evolution during dissolution of ferrous sulfide with an aqueous acidic solution comprising contacting the ferrous sulfide with an aqueous acidic solution containing an effective amount of an additive comprising at least one member selected from the group consisting of maleic acid, maleic anhydride and the alkali metal and ammonium salts of maleic acid. The aqueous acidic solution also can contain corrosion inhibitors.

REFERENCES:
patent: 1873083 (1932-08-01), Walker
patent: 3399230 (1968-08-01), Campbell
patent: 3794523 (1974-02-01), Thompson
patent: 4147647 (1979-04-01), Rybacki
patent: 4220550 (1980-09-01), Frenier et al.
patent: 4276185 (1981-06-01), Martin
patent: 4289639 (1981-09-01), Buske

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