Method for producing thermal insulation from dry-fine oil-sands

Details Method for producing thermal insulation from dry-fine oil-sands Method for producing thermal insulation from dry-fine oil-sands

1996-11-14

1998-05-05

Marcantoni, Paul

Compositions

Electrolytes for electrical devices

501128, 501133, 4233281, 4233282, E04B 174

Patent

active

057469326

ABSTRACT:
A method of making low-density silica-alumina thermal insulation wherein sulfuric acid is used to leach clay fines from processed Athabasca oil sands. The treated fines are dried and roasted to produce a fine buff to white colored powder with particle sizes that range from forty microns to less than a micron. About 80% of these particles are less than twenty microns. The bulk density of this powder is about fifteen to thirty-five pounds to the cubic-foot (lb./ft.sup.3), compared to silica sand which has a bulk density of 150 lb./ft.sup.3, and alumina which is about 200 lb./ft.sup.3, depending on the grade and method of production.

REFERENCES:
patent: 4221672 (1980-09-01), McWilliams et al.
patent: 4792466 (1988-12-01), McWilliams et al.

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