自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第11卷    第2期    总第24期    1980年6月

[PDF全文下载]    [Flash在线阅读]

    

N235萃钒机理的研究
陈超球1,张祥麟2

(1.化学系
2.中南工业大学化学系,长沙,410083
)

摘 要: 本文研究了用N235的煤油溶液(按体积计,加有作为助溶剂的仲辛醇20%)在盐酸体系中从钒酸钠水溶液萃钒的机理。在35±1℃恒温下,用饱和法及等摩尔系列法测得,当水相平衡pH分别为2.7~3.3和3.9~4.0之间时,N235萃钒的萃合比(钒∶胺,摩尔比)分别为2.5和2.0;水相平衡pH在3.5~3.8之间时,萃合比在2.0~2.5之间。在35±1℃恒温下,用斜率法测得,在本文报导的实验条件下,N235的盐酸盐在有机相中的平均缔合度为1.5。因此,对应于萃合比为2.5和2.0的萃取反应方程式可能应分别为3HV10O28(a)5-+10(R3NHCl)1.5(O)=3(R3NH)5HV10O28(O)+15Cl(a)-3H2V10O28(a)4-+8(R3NHCl)1.5(O)=3(R3NH)4H2V10O28(O)+12Cla-

 

关键字: 钒酸钠,萃取反应,区域图,萃钒机理,饱和法,等摩尔系列法,萃合比

Mechanism of Extraction of Vanadium(V)with N235
陈超球1,张祥麟2

1.化学系
2.中南工业大学化学系,长沙,410083

Abstract:The extraction of vanadium(V)from aqueous hydrochlorie acid solutionswith N235[whose formula is N(CnH2n+1)3,n=7~9]in kerosene(with theaddition of sec.-octyl alcohol amounting to 20% by volume to prevent the formation of the third phase in the system)has been investigated at 35±1℃by the maximum saturation method and the method of continuous variation.Based on the experimental results,the chemical equations elucidatingthe mechanism of the extraction were suggested to be:H2V10O28n4-+(4/n)(R3NHCl)no=(R3NH)4H2V10O280+4Cl?-(Ⅰ)in the equilibrium pH range of 2.7~3.3 in the aqueous phase andHV10O28(a)5-+(5/n)(R3NHCl)no=(R3NH)5HV10O280+5Cla-(Ⅱ)in the equilibrium pH range of 3.9~4.0 in the aqueous phase,where R3Nrepresents N235,(a)and(o)refer to the aqueous and organic phase respecti-vely and n is the mean degree of association of the amine hydrochloride inthe aqueous phase.In the equilibrium pH range of 3.5~3.8 in the aqueousphase,probably both compounds(Ⅰ)and(Ⅱ)were formed in the organicphase.To evaluate n,the slope method was used.The mean degree of associati-on of the amine hydrochloride in the organic phase,n was found to be 1.5approximately under the experimental conditions specified in this paper.

 

Key words:

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号