Process of forming an expanded lightweight foamed product from r

Details Process of forming an expanded lightweight foamed product from r Process of forming an expanded lightweight foamed product from r

1989-10-13

1992-07-28

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 97, 162101, 264 63, D21C 306

Patent

active

051338343

ABSTRACT:
Plant waste products high in cellulose and silica, i.e. rice hulls, are converted into a slurry of water and a silicate cross-linked cellulose polymer by digestion under heat and pressure in the presence of sodium ions and a sulfite. The slurry is treated with conventional foaming agents to form a formed product expanded in volume. The foamed product may be formed into any desired shape or size by extrusion, molding or casting.

REFERENCES:
patent: 1588335 (1926-06-01), Puttaert et al.
patent: 1740280 (1929-12-01), Bryant
patent: 1848661 (1930-06-01), Richter
patent: 2924547 (1960-02-01), Knapp et al.
patent: 2962413 (1960-11-01), Hatheway

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