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Title: Recovery of alkali metal constituents from catalytic coal conversion residues

Abstract

In a coal gasification operation (32) or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles by contacting them with water or an aqueous solution to remove water-soluble alkali metal constituents and produce an aqueous solution enriched in said constituents. The aqueous solution thus produced is then contacted with carbon dioxide to precipitate silicon constituents, the pH of the resultant solution is increased, preferably to a value in the range between about 12.5 and about 15.0, and the solution of increased pH is evaporated to increase the alkali metal concentration. The concentrated aqueous solution is then recycled to the conversion process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst.

Inventors:
OSTI Identifier:
5331337
Application Number:
ON: DE84005976
Assignee:
EDB-84-025913
DOE Contract Number:  
AC01-78ET13005
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ALKALI METALS; CATALYTIC EFFECTS; RECOVERY; COAL GASIFICATION; MATERIALS RECOVERY; RESIDUES; AQUEOUS SOLUTIONS; CARBON DIOXIDE; CATALYSTS; FLOWSHEETS; RECYCLING; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DIAGRAMS; DISPERSIONS; ELEMENTS; GASIFICATION; MANAGEMENT; METALS; MIXTURES; OXIDES; OXYGEN COMPOUNDS; PROCESSING; SOLUTIONS; THERMOCHEMICAL PROCESSES; WASTE MANAGEMENT; WASTE PROCESSING; 010404* - Coal, Lignite, & Peat- Gasification; 010500 - Coal, Lignite, & Peat- Products & By-Products; 010800 - Coal, Lignite, & Peat- Waste Management; 320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

Soung, W.Y. Recovery of alkali metal constituents from catalytic coal conversion residues. United States: N. p., Web.
Soung, W.Y. Recovery of alkali metal constituents from catalytic coal conversion residues. United States.
Soung, W.Y. . "Recovery of alkali metal constituents from catalytic coal conversion residues". United States.
@article{osti_5331337,
title = {Recovery of alkali metal constituents from catalytic coal conversion residues},
author = {Soung, W.Y.},
abstractNote = {In a coal gasification operation (32) or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles by contacting them with water or an aqueous solution to remove water-soluble alkali metal constituents and produce an aqueous solution enriched in said constituents. The aqueous solution thus produced is then contacted with carbon dioxide to precipitate silicon constituents, the pH of the resultant solution is increased, preferably to a value in the range between about 12.5 and about 15.0, and the solution of increased pH is evaporated to increase the alkali metal concentration. The concentrated aqueous solution is then recycled to the conversion process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {},
month = {}
}