| prov:value
| - Referring to FIG. 1, crude glycerol (100) may contain impurities, including, but not limited to, water, inorganic salts, such as chloride, sulfate, phosphate, acetate salts and others, organic compounds such as fatty acids, fattyester, mono-glycerides, di-glycerides, phospholipids, protein residues, methanol, acids, bases and various combinations of any of these impurities.
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