Recovery and regeneration of spent MHD seed material by the formate process

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:868030

Sheth, Atul C ^[1]; Holt, Jeffrey K ^[2]; Rasnake, Darryll G ^[2]; Solomon, Robert L ^[3]; Wilson, Gregory L ^[4]; Herrigel, Howard R ^[3]

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1. Tullahoma, TN
2. Manchester, TN
3. Seattle, WA
4. Redmond, WA

The specification discloses a spent seed recovery and regeneration process for an MHM power plant employing an alkali metal salt seed material such as potassium salt wherein the spent potassium seed in the form of potassium sulfate is collected from the flue gas and reacted with calcium hydroxide and carbon monoxide in an aqueous solution to cause the formation of calcium sulfate and potassium formate. The pH of the solution is adjusted to supress formation of formic acid and to promote precipitation of any dissolved calcium salts. The solution containing potassium formate is then employed to provide the potassium salt in the form of potassium formate or, optionally, by heating the potassium formate under oxidizing conditions to convert the potassium formate to potassium carbonate.

• Research Organization: Univ. of Tennessee, Knoxville, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC22-87PC79671
• Assignee: University of Tennessee Research Corporation (Knoxville, TN)
• Patent Number(s): US 5057294
• OSTI ID: 868030
• Country of Publication: United States
• Language: English

Related Subjects

recovery
regeneration
spent
mhd
seed
material
formate
process
specification
discloses
mhm
power
plant
employing
alkali
metal
salt
potassium
form
sulfate
collected
flue
gas
reacted
calcium
hydroxide
carbon
monoxide
aqueous
solution
formation
ph
adjusted
supress
formic
acid
promote
precipitation
dissolved
salts
containing
employed
provide
optionally
heating
oxidizing
conditions
convert
carbonate
potassium seed
potassium carbonate
oxidizing conditions
calcium salts
potassium sulfate
regeneration process
solution containing
carbon monoxide
alkali metal
aqueous solution
metal salt
power plant
flue gas
seed material
specification discloses
calcium hydroxide
calcium sulfate
formic acid
potassium salt
generation process
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