Reducing corrosion in reactors used for the synthesis of chromiu

Details Reducing corrosion in reactors used for the synthesis of chromiu Reducing corrosion in reactors used for the synthesis of chromiu

1976-07-06

1978-04-18

Padgett, Benjamin R.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

21 25R, 423 58, 252387, C23F 1118

Patent

active

040849368

ABSTRACT:
In order to reduce corrosion of the inside walls of a reactor made of iron or an iron alloy and used for the synthesis of chromium dioxide by hydrothermal conversion of chromium(VI) oxide with chromium oxides of lower valency, lead or bismuth is added at those points of the reactor at which an aqueous phase occurs during conversion and which do not contact the chromium oxides to be converted. The lead or bismuth may be used in metallic form or in the form of their oxides, hydroxides or salts.

REFERENCES:
patent: 3087778 (1963-04-01), Negra et al.
patent: 3493328 (1970-02-01), Nieuwenhuis
patent: 3615264 (1971-10-01), Berry et al.

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