Hollow spheres produced from natural zeolites

Details Hollow spheres produced from natural zeolites Hollow spheres produced from natural zeolites

1982-03-22

1984-05-15

Bell, Mark

Glass manufacturing

Processes

Self-supporting particle making

501 33, 501 39, C03B 1910, C03C 304

Patent

active

044485999

ABSTRACT:
A process is described for the formation of hollow glassy generally spherical particles ("microspheres") from natural mineral zeolites. A zeolite (or a mixture of zeolites) is rapidly heated to a temperature above its liquidus temperature to melt its surfaces, vaporize its combined water and cause it to expand to form the microspheres. The microspheres have diameters in the range of 1 to 500 millimeters and densities of about 0.1 to 2.0 g/cm.sup.3. They are useful as fillers and extenders in many materials such as plastics, and, because of their resistance to alkaline attack, are especially useful as fillers in cementitious materials.

REFERENCES:
patent: 2639132 (1953-05-01), Bradford
patent: 2676892 (1954-04-01), McLaughlin
patent: 2797201 (1957-06-01), Veatch et al.
patent: 3030215 (1962-04-01), Veatch et al.
patent: 3129086 (1964-04-01), Veatch et al.
patent: 3365315 (1968-01-01), Beck et al.
patent: 3794503 (1974-02-01), Netting
patent: 3838998 (1974-10-01), Matthews et al.

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