Method and composition for removing sulfide-containing scale fro

Details Method and composition for removing sulfide-containing scale fro Method and composition for removing sulfide-containing scale fro

1979-12-06

1982-01-12

Weinblatt, Mayer

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

252148, 252181, 252 86, 252 87, 252 855E, 422 12, 134 40, 134 41, C02F 510

Patent

active

043104355

ABSTRACT:
The method of chemically cleaning acid-soluble, sulfide-containing scale from a metal surface using an aqueous cleaning composition comprising an aqueous non-oxidizing acid having one or more aldehydes dissolved or dispersed therein is improved by generating the aldehyde in situ. An aqueous acid cleaning composition comprising hydrochloric or sulfuric acid and hexamethylene tetramine is a preferred composition.

REFERENCES:
patent: 2606873 (1952-08-01), Cardwell et al.
patent: 3077454 (1963-02-01), Monroe et al.
patent: 3335090 (1967-08-01), Davidowitch et al.
patent: 3669613 (1972-06-01), Knox et al.

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