Assertion: lignin | /r/HasProperty | precipitated at higher ph
Facets:
Source sentences:
text: Due to their low solubility at pHs intermediate between the pKa values of phenolic groups and carboxylic groups (Table 1), such fractions can be expected to contain less carbohydrate matter compared to when precipitation is brought about by addition of strong acid and further reduction of the pH. However, as described specifically in the LignoForce system, strong acid can be used to wash lignin precipitated at a higher pH, thus allowing metal ions to be washed free of the material (Uloth and Wearing 1989a; Ziesig et al.