Composition of phenolic compounds in wastewater from the fixed-bed gasification of Baishihu coal

Abstract Crude phenols extracted using organic solvent from the wastewater of a typical fixed-bed gasification process was used as raw material, and distillation range analyzed. The wide narrow fractions material derived analysis were cut real boiling point device. phenolic compounds in different then qualitatively quantitatively analyzed by gas chromatography after derivatization pretreatment. yield < 290 °C fraction 68.50% (mass fraction). A total 33 effective identified this fraction, percentage nearly 80%. contents eight high, with phenol being most abundant (26.34%) followed catechol (13.44%). remaining six ranged 4% to 8%. sum m-cresol p-cresol exceeded 12%, content 5-indenol rich low-grade (< 230 °C) 35.40%. more than 40%, cresol over 23%, 20%. At room temperature, 235–245 245–260 white crystals which approximately 50%, 10%. these two high-value-added are low coal tar, making them difficult extract. However, due their strong polarity good water solubility, enriched selection, allowing further extraction.