Process for preparing porous cellulose spherical particles

Details Process for preparing porous cellulose spherical particles Process for preparing porous cellulose spherical particles

1980-07-30

1982-01-26

Garris, Bradley

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

106122, 106189, 106198, 252427, 252448, 536 69, 536 82, C08B 306, C08B 326

Patent

active

043129803

ABSTRACT:
A solution of cellulose triacetate in a mixed solvent consisting essentially of a chlorinated hydrocarbon with a boiling point lower than that of an aqueous medium and an aliphatic higher alcohol with 6 or more than 6 carbon atoms is suspended into the aqueous medium to form droplets of the above-mentioned solution, and then the chlorinated hydrocarbon in the droplets is removed by evaporation to obtain spherical particles of cellulose triacetate containing the aliphatic higher alcohol. The spherical particles thus obtained are saponified and removed of the aliphatic higher alcohol, to prepare porous cellulose spherical particles.

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patent: 3852224 (1974-12-01), Bridgeford
patent: 4055510 (1977-10-01), Peska et al.
patent: 4090022 (1978-05-01), Tsao et al.
patent: 4118449 (1978-10-01), Rinde
patent: 4171987 (1979-10-01), Horiguchi et al.
patent: 4234528 (1980-11-01), Nussbaumer et al.

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