skip to main content

Title: Organic or organometallic template mediated clay synthesis

A method is described for incorporating diverse varieties of intercalates or templates directly during hydrothermal synthesis of clays such as hectorite or montmorillonite-type layer-silicate clays. For a hectorite layer-silicate clay, refluxing a gel of silica sol, magnesium hydroxide sol and lithium fluoride for two days in the presence of an organic or organometallic intercalate or template results in crystalline products containing either (a) organic dye molecules such as ethyl violet and methyl green, (b) dye molecules such as alcian blue that are based on a Cu(II)-phthalocyannine complex, or (c) transition metal complexes such as Ru(II)phenanthroline and Co(III)sepulchrate or (d) water-soluble porphyrins and metalloporphyrins. Montmorillonite-type clays are made by the method taught by U.S. Pat. No. 3,887,454 issued to Hickson, Jun. 13, 1975; however, a variety of intercalates or templates may be introduced. The intercalates or templates should have (i) water-solubility, (ii) positive charge, and (iii) thermal stability under moderately basic (pH 9-10) aqueous reflux conditions or hydrothermal pressurized conditions for the montmorillonite-type clays. 22 figures.
Authors:
; ;
Publication Date:
OSTI Identifier:
7198233
Report Number(s):
US 5308808; A
PPN: US 7-836747
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 19 Feb 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CLAYS; HYDROTHERMAL SYNTHESIS; DYES; IMPREGNATION; COBALT COMPLEXES; COPPER COMPLEXES; ORGANOMETALLIC COMPOUNDS; RUTHENIUM COMPLEXES; COMPLEXES; ORGANIC COMPOUNDS; SYNTHESIS; TRANSITION ELEMENT COMPLEXES 360601* -- Other Materials-- Preparation & Manufacture