摘要:
按三类典型工业聚合氯化铝的生产条件制得铝浓度为2.50mol·l-1,盐基度为0%—92%的A,C,D系列样品,同时采用慢速滴碱法制得铝浓度为0.150mol·l-1—0.336mol·l-1,盐基度为0%—92%的B系列聚合氯化铝.Ferron试验结果表明:相同盐基度不同系列样品的Alb值大小变化规律为:盐基度等于20%时,CDAB;盐基度等于30%时,ADBC;盐基度大于30%时,BADC;四个系列样品的Ala均随盐基度的升高而减小,Alc则随盐基度的升高而增加.27A1-NMR测试结果表明:四个系列所有样品的Al单均随盐基度的升高而减小;相同盐基度的不同系列样品Al13值大小顺序为BACD;A,C,D系列样品的Al其他均随盐基度的升高而增加,B系列样品的Al其他则先随盐基度的升高而增加,达到最大值后开始降低,然后再开始上升,最大值为B4样品的44.40%.A,C,D三个工业系列样品中的Alb和Al13的绝对值均不大,在所研究的盐基度范围内Alb和Al13均不是其中的优势形态.B系列样品在盐基度大于60%时,Alb和Al13成为其中的优势形态.
Abstract:
Three series of polyaluminum chloride(A,C,D three series and 24 specimen in total)with aluminum concentration 2.50 mol·l-1 have been prepared under simulated industrial production conditions and a series 8 specimen with Al concentration 0.150 mol·l-1—0.336 mol·l-1 has been obtained using a low-speed alkaline titrimetry(B series),and the maximum value of the basicity is 92% among all specimens.The Ferron experiment results show:(1)for different specimen series at the same basicity the changing regulation of Alb value is :when basicity is 0—20%,CDAB;when basicity is 20%—30%,ADBC;when basicity is over 30%,BADC,(2)for all specimens of four series,Ala decreases with rising of basicity,Alc increases with rising of basicity.The experiment results of 27Al-NMR specroscopy show:(1)for specimens of different series at the same basicity the Al13 value order is BADC,(2)for all specimens of four series the Al(mono)value decreases with rising of basicity.For specimens of A,C and D series,Al(others)increases with rising of basicity.For specimens of series B,Al(others)increases with rising of basicity at first,after reaching the maximum it begins to decrease,and then increases again,and its maximum value is 44.40% of specimen B4.The Alb Al13in the A,C,D specimens is not the main species,but when the basicity is over 60%,the Alb Al13in the B series is the major species.
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