Removal of lead from aqueous solution using metallic magnesium

Details Removal of lead from aqueous solution using metallic magnesium Removal of lead from aqueous solution using metallic magnesium

1971-04-05

1977-03-01

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

210 42R, 210 59, C07F 724

Patent

active

040101860

ABSTRACT:
A process is described for reducing the lead content of aqueous solution containing lead impurities in which the solution is contacted with metallic magnesium. Lead compounds are converted to water insoluble forms which are separated by recourse to physical processing such as steam distillation, filtration, settling, centrifugation, decantation and the like. In general, the process is conducted at pH of 7 to 11, preferably 8 to 9.5. Reaction temperature can be ambient temperature (25.degree. C.) or higher. In one embodiment the reaction is conducted in a steam distillation zone. The magnesium is added at a rate to provide at least 0.5 mole of magnesium per mole of lead, preferably 0.75 mole to 1.5 moles or more of magnesium per mole of lead.

REFERENCES:
patent: 1480110 (1924-01-01), Platten
patent: 2666684 (1954-01-01), Denyes
patent: 3117000 (1964-01-01), Schlain et al.
patent: 3308061 (1967-03-01), Collier
patent: 3697567 (1972-10-01), Taylor

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