Process for the production of free-flowing directly compactable

Details Process for the production of free-flowing directly compactable Process for the production of free-flowing directly compactable

1977-05-27

1979-05-01

Schafer, Richard E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423260, 423261, C01G 4302

Patent

active

041523954

ABSTRACT:
There is provided a process 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. An apparatus for carrying out the process is also described. SU

REFERENCES:
patent: 2551543 (1951-05-01), Mohr
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.
Comprehensive Inorganic Chem., Pergamin Press, N.Y., 1973, pp. 249-250.

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