Hydrothermal alkali metal catalyst recovery process

Patent · Mon Jan 01 00:00:00 EST 1979

OSTI ID:863364

Eakman, James M ^[1]; Clavenna, LeRoy R ^[2]

---

1. Houston, TX
2. 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.

• DOE Contract Number: E(49-18)-2369
• Assignee: Exxon Research & Engineering Co. (Florham Park, NJ)
• Patent Number(s): US 4157246
• OSTI ID: 863364
• Country of Publication: United States
• Language: English

Related Subjects

hydrothermal
alkali
metal
catalyst
recovery
process
coal
gasification
operation
similar
conversion
carried
presence
metal-containing
solid
particles
containing
residues
produced
constituents
recovered
primarily
form
water
soluble
formates
treating
calcium
magnesium-containing
compound
temperature
250
degree
700
added
carbon
monoxide
insoluble
compounds
comprising
converted
resultant
aqueous
solution
separated
treated
materials
formed
treatment
recycled
serve
portion
comprise
permits
increased
decreasing
overall
cost
reducing
amount
makeup
gasification operation
containing compound
process permits
compounds comprising
process carried
containing alkali
similar conversion
conversion process
particles containing
alkali metal-containing
water soluble
metal compound
metal compounds
metal constituents
solid particles
solution containing
carbon monoxide
alkali metal
aqueous solution
coal gasification
metal catalyst
recovery process
gasification process
coal gas
containing water
metal residues
treatment process
water insoluble
metal-containing catalyst
metal formate
solid particle
materials formed
soluble alkali
metal constituent
catalyst recovery
insoluble material
treating process
hydrothermal alkali
particles contain
soluble material
soluble materials
/48/208/502/999/