Process for digesting cellulose-containing material with...

Details Process for digesting cellulose-containing material with... Process for digesting cellulose-containing material with...

D - Textiles, Paper

21

C

9/3

D21C 3/04 (2006.01) C13K 1/02 (2006.01) C13K 13/00 (2006.01)

Patent

CA 1192705

- 1 - Abstract of the disclosure: According to the continuous process according to the invention for digesting cellulose-containing material (substrate) with gaseous hydrogen fluoride, HF is sorbed by the substrate at a temperature above its boiling point in n sorption steps and thereafter the sorbed HF is removed from the substrate by heating in n desorption steps. The number n of sorption steps and of desorption steps is identical and the reaction steps mentioned each occur in reactors which are separated from one another in a gas-tight manner. After introduction into the first sorption reactor (1a), the substrate passes consecutively through gas-tight valves into the second (1b) ...nth sorp- tion reactor and from the latter, optionally via a hold- up reactor (2) into the first, second, ... nth desorption reactor (3a) and is removed from the nth desorption reac- tor (3a). The streams of HF gas, which contain an inert carrier gas in addition to HF, are circulated between the first (1a) or second (1b) or ... (n-1)th or nth sorotion reactor and the nth (3a) or (n-1)th (3b) ... or second or first desorption reactor respectively.

414019

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