色谱法测定制浆造纸工业漂白废液中的草酸浓度

›› 2005, Vol. 25 ›› Issue (1): 23-28.

• 研究报告 • Previous Articles Next Articles

CHROMATOGRAPHIC METHOD FOR DETERMINATION OF OXALIC ACID IN BLEACHING FILTRATES FROM THE PULP AND PAPER INDUSTRY

HONG Feng^1,2, REIMANN Anders³, JÖNSSON Leif-j², NILVEBRANT Nils-olof³

1. College of Chemistry and Chemical Engineering, Donghua University, Shanghai 200051, China;2. Division for Chemistry, Karlstad University, Karlstad SE-65188, Sweden;3. STFI, Swedish Pulp and Paper Research Institute, Stockholm SE-11486, Sweden

Received:2004-07-05 Revised:1900-01-01 Online:2005-03-30 Published:2005-03-30

Abstract

Abstract: Analysis and control of oxalic acid in bleaching filtrates has recently gained considerable attention in the pulp and paper industry due to problems with the formation of calcium oxalate scaling.Chromatographic methods,such as HPLC and ion chromatography(IC),are generally valuable as standard methods for determination of oxalic acid.In this study,a HPLC system equipped with an Aminex HPX-87H column was applied to determine oxalic acid in (authentic) bleaching filtrates.An established IC method based on separation with an anion-exchange column was used as reference method.The results showed that bleaching filtrates contain compounds interfering with the HPLC method.A strategy, dilution of the samples followed by treatment with activated carbon,was needed to obtain similar oxalic acid concentrations as provided by the reference method.The correlation(R=0.994) between the HPLC method and the IC method is described by the equation y=1.2947x.The method improves the possibility for control of critical (oxalic) acid concentration in closed-loop bleaching streams.

Key words: oxalic acid, bleaching filtrates, activated carbon, pulp and paper industry

CLC Number:

HONG Feng;REIMANN Anders;JÖNSSON Leif-j;NILVEBRANT Nils-olof. CHROMATOGRAPHIC METHOD FOR DETERMINATION OF OXALIC ACID IN BLEACHING FILTRATES FROM THE PULP AND PAPER INDUSTRY[J]. , 2005, 25(1): 23-28.

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CHROMATOGRAPHIC METHOD FOR DETERMINATION OF OXALIC ACID IN BLEACHING FILTRATES FROM THE PULP AND PAPER INDUSTRY

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