Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1975-09-29
1977-11-08
Douglas, Winston A.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
48197R, 48202, 48210, 201 17, 252411R, 209214, 423127, 423132, 423206R, 423339, C01D 502, C01D 1300, C01F 734, C01B 3312
Patent
active
040575128
ABSTRACT:
In a coal gasification operation or similar process carried out in the presence of an alkali metal-containing catalyst wherein spent solids containing ash and alkali metal catalyst residues are produced, alkali metal constituents are recovered from the spent solids by first removing magnetic constituents from the solids, contacting the solid particles from which magnetic constituents have been separated with an acid solution to extract alkali metal constituents from the solids and produce a spent acid solution enriched in alkali metal salts, raising the pH of the enriched solution sufficiently to precipitate aluminum from the solution as aluminum hydroxide, heating the remaining solution to precipitate silicon compounds, and recovering an enriched alkali metal solution from which aluminum and silicon compounds have been removed. This process permits the effective recovery of alkali metal catalyst constituents, eliminates iron compounds and other inactive constituents which may otherwise tend to build up in the catalyst system, and makes possible the recovery of aluminum as a valuable by-product of the process.
REFERENCES:
patent: 1845815 (1932-02-01), Riddle
patent: 2141132 (1938-12-01), Folger
patent: 2754273 (1956-07-01), Shabaker
patent: 3393978 (1968-07-01), Murphy et al.
patent: 3481695 (1969-12-01), Hite
patent: 3615299 (1971-10-01), Fischer
patent: 3615300 (1971-10-01), Holm
patent: 3625354 (1971-12-01), Heitmann
patent: 3847567 (1974-11-01), Kalina
patent: 3860514 (1975-01-01), Lee
patent: 3873427 (1975-03-01), Long et al.
patent: 3929431 (1975-12-01), Koh et al.
patent: 3957459 (1976-05-01), Mitchell et al.
patent: 3998607 (1976-12-01), Wesselhoft et al.
Nahas Nicholas C.
Vadovic Charles J.
Wesselhoft Robert D.
Douglas Winston A.
Exxon Research & Engineering Co.
Konopka P. E.
Reed James E.
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