Sodium to sodium carbonate conversion process
Patent
·
OSTI ID:871189
- Idaho Falls, ID
A method of converting radioactive alkali metal into a low level disposable solid waste material. The radioactive alkali metal is atomized and introduced into an aqueous caustic solution having caustic present in the range of from about 20 wt % to about 70 wt % to convert the radioactive alkali metal to a radioactive alkali metal hydroxide. The aqueous caustic containing radioactive alkali metal hydroxide and CO.sub.2 are introduced into a thin film evaporator with the CO.sub.2 present in an amount greater than required to convert the alkali metal hydroxide to a radioactive alkali metal carbonate, and thereafter the radioactive alkali metal carbonate is separated from the thin film evaporator as a dry powder. Hydroxide solutions containing toxic metal hydroxide including one or more metal ions of Sb, As, Ba, Be, Cd, Cr, Pb, Hg, Ni, Se, Ag and T1 can be converted into a low level non-hazardous waste using the thin film evaporator of the invention.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5678240
- OSTI ID:
- 871189
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/588/423/
20
70
alkali
alkali metal
amount
aqueous
aqueous caustic
atomized
carbonate
caustic
caustic solution
cd
containing
containing radioactive
conversion
conversion process
convert
converted
converting
disposable
dry
dry powder
evaporator
film
film evaporator
hazardous waste
hg
hydroxide
hydroxide solution
including
introduced
level
material
metal
metal carbon
metal carbonate
metal hydroxide
method
non-hazardous
oxide including
oxide solution
pb
powder
process
radioactive
radioactive alkali
range
required
sb
separated
sodium
sodium carbonate
solid
solid waste
solution
solutions
solutions containing
t1
thereafter
toxic
toxic metal
waste
waste material
wt
20
70
alkali
alkali metal
amount
aqueous
aqueous caustic
atomized
carbonate
caustic
caustic solution
cd
containing
containing radioactive
conversion
conversion process
convert
converted
converting
disposable
dry
dry powder
evaporator
film
film evaporator
hazardous waste
hg
hydroxide
hydroxide solution
including
introduced
level
material
metal
metal carbon
metal carbonate
metal hydroxide
method
non-hazardous
oxide including
oxide solution
pb
powder
process
radioactive
radioactive alkali
range
required
sb
separated
sodium
sodium carbonate
solid
solid waste
solution
solutions
solutions containing
t1
thereafter
toxic
toxic metal
waste
waste material
wt