Agglomerating particulate perlite

Details Agglomerating particulate perlite Agglomerating particulate perlite

1977-10-17

1979-11-20

Robinson, Ellis P.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

106DIG2, 252378P, 252455R, 210502, 210506, 428403, 428404, 428406, 428427, 428446, 264117, B32B 900, C04B 3122

Patent

active

041751582

ABSTRACT:
Particulate perlite fines are agglomerated to increase the apparent particle size by forming a mixture of the perlite fines with a compound such as boric acid capable of being substantially converted to B.sub.2 O.sub.3 at elevated temperatures. The mixture is heated while mixing to convert the compound to B.sub.2 O.sub.3 and to at least partially coat the particulate perlite.The mixture is then heated above the melting point of B.sub.2 O.sub.3 to agglomerate the perlite fines. The product of this process has particular utility as an improved filter aid.

REFERENCES:
patent: 1677701 (1928-07-01), Alton
patent: 2904424 (1959-09-01), Chapman
patent: 2970060 (1961-01-01), Burnett
patent: 2970061 (1961-01-01), Burnett
patent: 3233740 (1966-02-01), Vander Linden
patent: 3235635 (1966-02-01), Riede
patent: 3441515 (1969-04-01), Oshida
patent: 3515624 (1970-06-01), Garvero
patent: 3653862 (1972-04-01), Lynch
patent: 3810773 (1974-05-01), Shannon
patent: 4064071 (1977-12-01), Gilmour

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