Method for cleaning a vessel

Details Method for cleaning a vessel Method for cleaning a vessel

1992-06-01

1993-11-23

Morris, Theodore

Cleaning and liquid contact with solids

Processes

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

134 3, 134 28, 134 41, C23G 100, C23G 102, B08B 304, B08B 308

Patent

active

052640418

ABSTRACT:
A method for cleaning a vessel by dissolving iron oxide present in the vessel includes introducing a saline solution into the vessel, the saline solution being formed of an acid acting as a complexing agent, of an alkalizing agent and of a reducing agent, the saline solution acting as an alkaline reducer; retaining the saline solution in the vessel for a given period of time at a temperature above 140.degree. C. and below the decomposition temperature of the anionic part of the saline solution for forming an iron complex; and subsequently removing the dissolved iron complex by emptying the vessel.

REFERENCES:
patent: 3627687 (1981-12-01), Teumac
Balakrishnan, P. V.; Lister, D. H., "Chemical cleaning of nuclear steam generator", Water Chem. Nucl. React. Syst. 1980 (Pub. 1981). (Month Unknown).

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