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Chemcial Industry and Engineering 1997, Vol. 14 Issue (2) :45-50    DOI:
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STUDY ON PREPARATION OF OXALIC ACID BY ACIDOLYSIS OF OXACALCITE
Wang Zixin

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Abstract In the prepration of oxalic acid by calcification method, the main reaction is the acidolysis of oxacalcite by sulphuric acid. The phase diagram of SO 2- 4-Ca 2+ were determined by experiments,thus the crystal area and spontaneous nucleation area of CaSO 4��2H 2O were found.Using mathematical model to direct feeding of raw material we can get rather ideal crystal grain,and the filtering rate achieved is as high as 0 75m 3/m 2��min.
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Keywords�� solubility product super saturation nucleation phase fidiagramure crystalization filtering rate     
Received 1997-04-15;
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Wang Zixin .STUDY ON PREPARATION OF OXALIC ACID BY ACIDOLYSIS OF OXACALCITE[J]  Chemcial Industry and Engineering, 1997,V14(2): 45-50
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