Process for the synthesis of a layered, clay-like material as we

Details Process for the synthesis of a layered, clay-like material as we Process for the synthesis of a layered, clay-like material as we

1993-12-09

1996-03-12

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106483, 501141, 588249, 588252, 502 74, 502 80, 502 84, 502 85, 4233281, C04B 3302, C01B 3326, C01B 3332

Patent

active

054982855

ABSTRACT:
The invention relates to a process for the synthesis of a layered, clay-like material starting from a silicon oxide containing material in a finely divided state by reacting a glass phase containing material at a pH from 5 to 8, in the presence of water, with a source of layer-forming metal ions and an activator for the formation of clay under atmospheric conditions to obtain a material with a stable structure. Preferably aluminium and/or magnesium ions are employed as layer-forming metal ions. Furthermore, according to a suitable embodiment, boron glass or cullet is employed as a material containing silicon oxide. The conversion of the mixture of materials into a substance having an ordered structure takes place preferably at a pH of approximately 7 and a temperature of 30.degree.-45.degree. C., in which the starting materials appropriately have a particle size of approximately 100 microns. An activator for the formation of clay is added to accelerate the process of conversion. Moreover, if desired, a clay modifier can be added. As starting mixture, a hearth ash containing a glass fraction obtained by incinerating household and industrial waste can be employed; this hearth ash proves to be a useful secondary raw material. By means of the present process waste material, whether subjected to incineration or not, that has been polluted with inorganic material can be immobilized.

REFERENCES:
patent: 4600514 (1986-07-01), Conner

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