Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – For radioactive reactant or product
Patent
1978-10-30
1981-06-02
Garris, Bradley R.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
For radioactive reactant or product
422225, 2523011S, C09K 300, G21C 1942, G21C 2102, G21F 906
Patent
active
042711274
ABSTRACT:
A process and apparatus for the production of pourable, directly compactable uranium dioxide powder by continuous precipitation of uranium peroxide from a stirred uranyl nitrate solution at a pH of 1-2.5 with hydrogen peroxide, calcining of the peroxide at 500.degree.-800.degree. C. and subsequent reduction at 550.degree.-750.degree. C. The precipitation solution contains 70-150 g/l of uranium and 0.80 g/l of ammonium nitrate and is treated with 15-20% aqueous hydrogen peroxide solution in the ratio of U:H.sub.2 O.sub.2 from 1:1.5 to 1:3 and there is led through the solution a mixture of ammonia and air having an air-ammonia volume ratio of 1:0.3-0.6.
REFERENCES:
patent: 2551543 (1951-05-01), Mohr
patent: 2701193 (1955-02-01), Heudier et al.
patent: 2723181 (1955-11-01), Larson
patent: 2852336 (1958-09-01), Seaburg et al.
patent: 3037840 (1962-06-01), Gregory et al.
patent: 3676075 (1972-07-01), Ploger et al.
patent: 3839435 (1974-10-01), Shigeyasu et al.
"Comprehensive Inorganic Chem."; Pergamin Press, N. Y.; 1973; pp. 249 & 250.
Borner Paul
Isensee Hans-Jorg
Vietzke Horst
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