Process for continuously dissolving a particulate solid...

Details Process for continuously dissolving a particulate solid... Process for continuously dissolving a particulate solid...

C - Chemistry, Metallurgy

07

G

260/133, 260/214

C07G 1/00 (2006.01) B01D 11/02 (2006.01) C08B 1/00 (2006.01)

Patent

CA 1140920

ABSTRACT A fragmented material is dissolved continuosly by impregnation and immersion into a solvent bath in which said material is subjected to a moderate mixing movement allowing it to be kept within the interior of said bath to undergo dissolution therin until formation of fine residual particles of insoluble material which are maintained in suspension by this movement, the whole being removed continuously by a controlled over- flow of the bath. This process is applied to cellulose contained is various lignocellulose materials, which is dissolved continuously by immersion of the previously impregnated material into a bath of hydrochloric acid through which hydrogen chloride gas is caused to bubble, to effect complete dissolution of the cellulose and suspension of the fine insoluble residual lignin particles.

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