Claims
- 1. A process for preparing chlorine and manganese dioxide from manganous chloride and oxygen utilizing nitric acid and manganese dioxide as cyclic reagents, said process comprising the steps of
- (1) reacting said manganous chloride with manganese dioxide and nitric acid to form an acidic solution containing manganous nitrate and gaseous chlorine, the molar ratio of manganese dioxide to manganous chloride being in excess of 1:1 and the molar ratio of nitric acid to manganous chloride being in excess of 4:1;
- (2) separating and removing said gaseous chlorine;
- (3) coating solid manganese dioxide particles with said manganous nitrate-containing solution and heating the coated particles above about 180.degree. C. to form manganese dioxide and a nitrogen dioxide-containing gaseous mixture, said heating being conducted in the absence of non-condensible gases;
- (4) separating said solid manganese dioxide from said gaseous product;
- (5) reacting the nitrogen dioxide-containing gas from step (4) with oxygen and water to form nitric acid;
- (6) recycling said nitric acid to step (1); and
- (7) withdrawing a quantity of manganese dioxide separated in step (4) equivalent to the amount of manganous chloride reacted in step (1) and recycling the remainder of said withdrawn manganese dioxide to steps (1) and (3) respectively, the amount recycled to step (3) being equal to the amount originally coated with said manganous nitrate-containing solution with the remaining portion being recycled to step (1).
Parent Case Info
This is a division of application Ser. No. 748,596 filed on Dec. 8, 1976, now U.S. Pat. No. 4,100,263.
US Referenced Citations (4)
Divisions (1)
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Number |
Date |
Country |
Parent |
748596 |
Dec 1976 |
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