Thermal and chemical remediation of mixed wastes

Patent · Wed Jan 01 04:00:00 EST 1997

OSTI ID:871273

Nelson, Paul A ^[1]; Swift, William M ^[2]

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1. Wheaton, IL
2. Downers Grove, IL

A process for treating organic waste materials without venting gaseous emissions to the atmosphere which includes oxidizing the organic waste materials at an elevated temperature not less than about 500.degree. C. with a gas having an oxygen content in the range of from about 20% to about 70% to produce an oxidation product containing CO.sub.2 gas. The gas is then filtered to remove particulates, and then contacted with an aqueous absorbent solution of alkali metal carbonates or alkanolamines to absorb a portion of the CO.sub.2 gas from the particulate-free oxidation product. The CO.sub.2 absorbent is thereafter separated for further processing. A process and system are also disclosed in which the waste materials are contacted with a reactive medium such as lime and product treatment as described.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• Assignee: University of Chicago (Chicago, IL)
• Patent Number(s): US 5697307
• OSTI ID: 871273
• Country of Publication: United States
• Language: English

Related Subjects

/110/
20
500
70
absorb
absorbent
absorbent solution
active medium
alkali
alkali metal
alkanolamines
aqueous
aqueous absorbent
atmosphere
carbonates
chemical
chemical remediation
contacted
containing
content
degree
described
disclosed
duct containing
elevated
elevated temperature
emissions
filtered
gas
gaseous
gaseous emissions
lime
materials
medium
metal
metal carbon
metal carbonate
metal carbonates
mixed
mixed waste
mixed wastes
organic
organic waste
oxidation
oxidation product
oxidizing
oxygen
oxygen content
particulate-free
particulates
portion
process
processing
produce
product
product containing
range
reactive
remediation
remove
remove particulate
separated
solution
temperature
thereafter
thermal
treating
treating organic
treatment
venting
venting gas
venting gaseous
waste
waste material
waste materials
wastes