Synthetic stevensite and process for preparation thereof

Details Synthetic stevensite and process for preparation thereof Synthetic stevensite and process for preparation thereof

1990-04-02

1991-04-02

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Clay containing

501153, 501154, 423331, C04B 3300

Patent

active

050047167

ABSTRACT:
Synthetic stevensite composed of stevensite-type sodium magnesium phylosilicate of which metallic components consist essentially of magnesium, sodium and silicon. The synthetic stevensite is characterized by having an X-ray diffraction peak at a spacing of 16 to 26 .ANG. when treated with ethylene glycol. It can be produced by a process comprising hydrothermally treating an aqueous composition containing basic magnesium carbonate and a silica-sodium component selected from the group consisting of (i) sodium silicate, (ii) sodium silicate and amorphous silica, and (iii) amorphous silica and sodium silicate.

REFERENCES:
patent: 3586478 (1971-06-01), Neumann
patent: 4040974 (1977-08-01), Wright et al.
patent: 4054537 (1977-10-01), Wright et al.
Brindley, G. W. and Brown, G., Crystal Structures of Clay Minerals and Their X-Ray Identification, Mineralogical Society Monograph No. 5, pp. 169-170 (1980).
Grim, R. E., Structure of the Clay Minerals, Clay Mineralogy, pp. 83-87 (1968).

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