Method of making a compound

Details Method of making a compound Method of making a compound

1984-11-05

1985-05-28

Carter, H. T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C01G 4512

Patent

active

045200050

ABSTRACT:
This specification is directed to a method of making a compound selected from the group consisting of birnessite compounds of the formula Bi.sub.x Mn.sub.y O.sub.2y+1.5x.zH.sub.2 O, wherein the y/x ratio is in a range of from about 7 to about 18 and the z/y ratio is in a range of from about 0.5 to about 0.6, Pb.sub.x Mn.sub.y O.sub.2y+x.zH.sub.2 O, wherein the y/x ratio is in a range of from about 6 to about 10 and the z/y ratio is in a range of from about 0.5 to about 0.6, and manganese oxide compounds containing both of these compounds. The method is characterized by the following steps. A solution is formed by mixing Mn(NO.sub.3).sub.2 with a nitrate of bismuth or lead or mixtures thereof. The solution is maintained at a relatively constant temperature and NaOH is added to the solution, whereby Mn(OH).sub.2 and a hydroxide of bismuth or lead or mixtures thereof form a suspension. While the suspension is being agitated, oxygen is passed through the suspension, whereby the Mn(OH).sub.2 and the hydroxide of bismuth or lead or mixtures thereof can react to form a compound. The suspension is filtered to recover the birnessite compound. Thereafter, the compound is washed with water and dried.

REFERENCES:
patent: 3579452 (1971-05-01), Hund
Mellor, "Inorganic and Theoretical Chemistry", vol. 12, Longmans, Green & Co., N.Y., 1932, pp. 274-280.

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