Cyclic process for producing alkali solution of cellulose...

Details Cyclic process for producing alkali solution of cellulose... Cyclic process for producing alkali solution of cellulose...

C - Chemistry, Metallurgy

08

B

260/215

C08B 15/06 (2006.01) C08B 3/14 (2006.01) D01F 2/24 (2006.01)

Patent

CA 1236095

ABSTRACT OF THE DISCLOSURE A cyclic process for producing an alkali solution of cellulose carbamate, for precipitating the celulose car- bamate from the alkali solution, and for recovering and re- cycling the chemicals, comprises the following steps: (a) an alkali solution of cellulose carbamate is prepared by dissolv- ing cellulose carbamate in an aqueous solution of sodium hydroxide, (b) the solution obtained in step (a) is brought into contact with a precipitating solution containing sodium carbonate, whereby the cellulose carbamate is precipitated and can be removed, (c) from the solution in step (b) sodium carbonate is crystallized and is returned to the precipitant solution in step (b), and (d) mother liquor containing sodium hydroxide, obtained in step (c), is used as the sodium hydr- oxide solution in step (a). The crystallization in step (c) can be carried out in two or more steps by cooling.

491574

Affiliated with

Also associated with

Rating

Cyclic process for producing alkali solution of cellulose... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cyclic process for producing alkali solution of cellulose..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cyclic process for producing alkali solution of cellulose... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1232433