Any way to "filter" cross linked vinyl solution?

[pippo]

People,

 

Need help badly- have a 15% w/v aqueous solution of polyvinyl alcohol. Upon the usual addition of a bactericide benzalkonium chloride (100mls/42L) it cross linked (turned very cloudy). Now, it appears homogeneously cloudy, unless its just in suspension. The solution is sooooo viscous too.

 

Might have to dump it unless I can filter it out, but my limited knowledge of organic says it might not be able to be.

 

Advice apprciated.

Oh- I assume the cross linking is because the preservative- benzalkonium chloride may be old, but not sure if that stuff even has an expiration date......Ive used it for many years - the same lot with no problems. Now, BOOM- cross linking (apparently)