Process for producing porous, spherical particles

Details Process for producing porous, spherical particles Process for producing porous, spherical particles

1988-01-14

1990-06-26

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

424489, 424499, A61K 916

Patent

active

049370812

ABSTRACT:
A process for producing porous, spherical particles of cellulose fatty acid esters which comprises dissolving a cellulose fatty acid ester and a gelling agent therefor in an organic solvent, adding the solution thus obtained to an aqueous medium with stirring to form droplets, converting said droplets to gel particles of cellulose fatty acid ester in the presence or absence of a gelation accelerator, and separating porous, spherical particles of cellulose fatty acid ester.

REFERENCES:
patent: 2805977 (1957-09-01), Robinson et al.
patent: 2921883 (1960-01-01), Reese et al.
patent: 3082154 (1963-03-01), Allan
patent: 3228257 (1967-06-01), Vrancken et al.
patent: 4089800 (1978-05-01), Temple
patent: 4151274 (1979-04-01), Schlueter et al.
patent: 4221862 (1980-09-01), Naito et al.

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