Process for the treatment of spent pickling paste

Details Process for the treatment of spent pickling paste Process for the treatment of spent pickling paste

1983-08-18

1984-10-23

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 27, 134 29, C23G 136

Patent

active

044786476

ABSTRACT:
A process for treating spent fluoride-containing pickling paste on metal surfaces by applying to the spent pickling paste on the metal surface an aqueous treating paste composition comprising calcium carbonate having a particle size not in excess of about 5 microns and an alkali metal bicarbonate, which composition has a pH which is not in excess of about 9.5.

REFERENCES:
patent: 3800024 (1974-03-01), Forsell et al.
patent: 3959132 (1976-05-01), Singh
patent: 4045339 (1977-08-01), Korenowski et al.
patent: 4400289 (1983-08-01), Geldner et al.

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