skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hydrothermal alkali metal recovery process

Abstract

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 by treating them 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 an added base to establish a pH during the treatment step that is higher than would otherwise be possible without the addition of the base. During the treating process the relatively high pH facilitates the conversion of water-insoluble alkali metal compounds in the alkali metal residues into water-soluble alkali metal constituents. The resultant aqueous solution containing water-soluble alkali metal constituents is then separated from the residue solids, which consist of the treated particles and any insoluble materials formed during the treatment step, and recycled to the gasification process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst. Preferably, the base that is added during the treatment step is an alkali metal hydroxide obtained by water washing the residue solids produced duringmore » the treatment step.« less

Inventors:
 [1];  [2];  [1];  [3]
  1. (Houston, TX)
  2. (Baytown, TX)
  3. (Morris Plains, NJ)
Issue Date:
OSTI Identifier:
863640
Patent Number(s):
4219338
Assignee:
Exxon Research & Engineering Co. (Florham Park, NJ) OSTI
DOE Contract Number:  
E(49-18)-2369
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hydrothermal; alkali; metal; recovery; process; coal; gasification; operation; similar; conversion; carried; presence; metal-containing; catalyst; solid; particles; containing; residues; produced; constituents; recovered; treating; calcium; magnesium-containing; compound; water; temperature; 250; degree; 700; added; base; establish; ph; treatment; step; otherwise; addition; relatively; facilitates; water-insoluble; compounds; water-soluble; resultant; aqueous; solution; separated; residue; solids; consist; treated; insoluble; materials; formed; recycled; serve; portion; comprise; preferably; hydroxide; obtained; washing; metal recovery; gasification operation; containing compound; process carried; containing alkali; similar conversion; water-soluble alkali; treatment step; conversion process; particles containing; alkali metal-containing; metal compound; metal compounds; metal constituents; solid particles; solution containing; alkali metal; aqueous solution; coal gasification; recovery process; gasification process; metal hydroxide; coal gas; containing water; metal residues; metal-containing catalyst; solid particle; materials formed; soluble alkali; metal constituent; constituents serve; insoluble material; treating process; hydrothermal alkali; particles contain; water wash; soluble material; soluble materials; /48/208/502/

Citation Formats

Wolfs, Denise Y., Clavenna, Le Roy R., Eakman, James M., and Kalina, Theodore. Hydrothermal alkali metal recovery process. United States: N. p., 1980. Web.
Wolfs, Denise Y., Clavenna, Le Roy R., Eakman, James M., & Kalina, Theodore. Hydrothermal alkali metal recovery process. United States.
Wolfs, Denise Y., Clavenna, Le Roy R., Eakman, James M., and Kalina, Theodore. Tue . "Hydrothermal alkali metal recovery process". United States. https://www.osti.gov/servlets/purl/863640.
@article{osti_863640,
title = {Hydrothermal alkali metal recovery process},
author = {Wolfs, Denise Y. and Clavenna, Le Roy R. and Eakman, James M. and Kalina, Theodore},
abstractNote = {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 by treating them 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 an added base to establish a pH during the treatment step that is higher than would otherwise be possible without the addition of the base. During the treating process the relatively high pH facilitates the conversion of water-insoluble alkali metal compounds in the alkali metal residues into water-soluble alkali metal constituents. The resultant aqueous solution containing water-soluble alkali metal constituents is then separated from the residue solids, which consist of the treated particles and any insoluble materials formed during the treatment step, and recycled to the gasification process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst. Preferably, the base that is added during the treatment step is an alkali metal hydroxide obtained by water washing the residue solids produced during the treatment step.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

Save / Share: