Hydrothermal alkali metal catalyst recovery process
- Houston, TX
- Baytown, TX
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles primarily in the form of water soluble alkali metal formates by treating the particles with a calcium or magnesium-containing compound in the presence of water at a temperature between about 250.degree. F. and about 700.degree. F. and in the presence of added carbon monoxide. During the treating process the water insoluble alkali metal compounds comprising the insoluble alkali metal residues are converted into water soluble alkali metal formates. The resultant aqueous solution containing water soluble alkali metal formates is then separated from the treated particles and any insoluble materials formed during the treatment process, and recycled to the gasification process where the alkali metal formates serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst. This process permits increased recovery of alkali metal constituents, thereby decreasing the overall cost of the gasification process by reducing the amount of makeup alkali metal compounds necessary.
- Assignee:
- Exxon Research & Engineering Co. (Florham Park, NJ)
- Patent Number(s):
- US 4157246
- OSTI ID:
- 863364
- Country of Publication:
- United States
- Language:
- English
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Hydrothermal alkali metal recovery process
Hydrothermal alkali metal recovery process
Related Subjects
250
700
added
alkali
alkali metal
alkali metal-containing
amount
aqueous
aqueous solution
calcium
carbon
carbon monoxide
carried
catalyst
catalyst recovery
coal
coal gas
coal gasification
compound
compounds
compounds comprising
comprise
comprising
constituents
containing
containing alkali
containing compound
containing water
conversion
conversion process
converted
cost
decreasing
degree
form
formates
formed
gasification
gasification operation
gasification process
hydrothermal
hydrothermal alkali
increased
insoluble
insoluble material
magnesium-containing
makeup
materials
materials formed
metal
metal catalyst
metal compound
metal compounds
metal constituent
metal constituents
metal formate
metal residues
metal-containing
metal-containing catalyst
monoxide
operation
overall
particles
particles contain
particles containing
permits
portion
presence
primarily
process
process carried
process permits
produced
recovered
recovery
recovery process
recycled
reducing
residues
resultant
separated
serve
similar
similar conversion
solid
solid particle
solid particles
soluble
soluble alkali
soluble material
soluble materials
solution
solution containing
temperature
treated
treating
treating process
treatment
treatment process
water
water insoluble
water soluble