[EngPet]

Dear friends
Cellulose is a biodegradable polymer which is insoluble in water
The reported solvents for it are the ionic liquid
Also some solvents systems can help

My question, when i use 10% wt NaOH solution to mercize and convert cellulose to Cell-ONa the resultant mixture is highly dispersed like gel
How to get  Powder for cellulose from this mix.
My cellulose is cellulose nanocrystals
Regards

[AWK]

Do you mean - regeneration of cellulose? There are many books and references on this subject.
This is a free chapter from one of these books:
http://pubs.acs.org/doi/pdf/10.1021/bk-2010-1033.ch001
and thesis
https://tel.archives-ouvertes.fr/pastel-00002229/document

[Arkcon]

Dear friends
Cellulose is a biodegradable polymer

By some metrics it is, but its quite resistant, so you might as well leave a bad definition off, like this one.  Even if it were pertinent to the discussion, which it isn't.  Jus' sayin' is all.

which is insoluble in water

I never saw a tree melt in the rain, so you've got that one.  Again, pertinent?

The reported solvents for it are the ionic liquid
Also some solvents systems can help

This says almost nothing.  It looks like it was written by an automated internet data-mining bot.  Which ionic liquid, which solvents?

My question, when i use 10% wt NaOH solution to mercize and convert cellulose to Cell-ONa the resultant mixture is highly dispersed like gel
How to get  Powder for cellulose from this mix.
My cellulose is cellulose nanocrystals
Regards

Like AWK: said, regenerated cellulose, cellophane as an example, has existed for nearly a century.  https://en.wikipedia.org/wiki/Cellophane#History  What your application is, and what you've tried, are what's needed now.