MEASUREMENT OF CRYSTALLIZING METASTABLE ZONE OF OXALIC ACID IN AQUEOUS SOLUTION WITH LASER SCATTERING METHOD

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MEASUREMENT OF CRYSTALLIZING METASTABLE ZONE OF OXALIC ACID IN AQUEOUS SOLUTION WITH LASER SCATTERING METHOD

Li Yang,Wang Baowei and Xu GenhuiMao Yi(State Key Lab of C_1 Chemical Technology,Tianjin University,Tianjin 300072)(School of Precision Instrument,Tianjin University,Tianjin 300072)

Online:2000-04-25 Published:2000-04-25

激光散射法测定草酸结晶介稳区

李阳,王保伟,许根慧,毛义

天津大学化工学院一碳化工国家重点实验室!天津300072,天津大学化工学院一碳化工国家重点实验室!天津300072,天津大学化工学院一碳化工国家重点实验室!天津300072,天津大学精仪学院!天津300072

Abstract

Abstract: In this paper the crystallizing metastable zone of oxalic acid in aqueous solution is investigated by usingthe laser scattering method,which detects appearance of nucleus on line,at 20 ℃,30 ℃,40 ℃,50 ℃,60 ℃ respectively. At the same time, the effect of the rate of stirring,the rate of cooling and impurities on the width of the crystallizing metastable zone is studied. The data of crystallizing metastable zone is obtained. The equations of the width of the first and second crystallizing metastable zone with cooling rate are b_Ⅰ=22.63×(Δθ_maxⅠ)~1.1; b_Ⅱ=2.66×(Δθ_maxⅡ)~1.55. The study provided the theoretical foundation for crystallizerdesign and operation.

CLC Number:

TQ04

Li Yang,Wang Baowei and Xu GenhuiMao Yi(State Key Lab of C_1 Chemical Technology,Tianjin University,Tianjin 300072)(School of Precision Instrument,Tianjin University,Tianjin 300072). MEASUREMENT OF CRYSTALLIZING METASTABLE ZONE OF OXALIC ACID IN AQUEOUS SOLUTION WITH LASER SCATTERING METHOD[J]. .

李阳,王保伟,许根慧,毛义. 激光散射法测定草酸结晶介稳区 [J]. CIESC Journal.

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