响应面法优化磷酸三丁酯-丁酸乙酯体系协同提锂工艺研究

doi:10.19964/j.issn.1006-4990.2022-0034

Abstract

Abstract:

The process of synergistic extraction of lithium from salt lake brine by tributyl phosphate-ethyl butyrate system was studied by response surface method with volume concentration of TBP,molar ratio of iron-lithium and phase ratio as independent variables and lithium extraction efficiency as response index.The optimal process conditions of the system obtained by response surface method were as follows:the volume concentration of TBP was 43%,the molar ratio of iron to lithium was 1.9 and phase ratio was 2.4.Under these conditions,the predicted value of lithium extraction efficiency was 92.39%,the actual measured valuewas 91.42%,and the relative error between predicted value and measured value was 1.05%.This study could provide a reference for the separation and extraction of lithium from salt lake brine.

Key words: response surface method, extraction, brine, lithium

CLC Number:

TQ131.11

SHI Chenglong,MA Shuqing,QIN Yaru,LIU Bing,LI Haichao. Study on optimization of synergistic lithium extraction process of tributyl phosphate-ethyl butyrate system by response surface method[J]. Inorganic Chemicals Industry, 2022, 54(10): 37-41.

Figures/Tables 7

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References 23

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水平	因素
水平	A 相比	B 铁锂物质的量比	C TBP体积分数/%
-1	1	1.0	30
0	2	1.5	40
1	3	2.0	50

序号	因素			萃取率（Y）/ %
序号	A	B	C	萃取率（Y）/ %
1	1	1	0	93.05
2	-1	-1	0	49.48
3	0	-1	1	75.51
4	0	0	0	87.23
5	1	0	1	92.57
6	-1	1	0	70.06
7	0	0	0	87.39
8	0	0	0	87.32
9	0	0	0	86.88
10	-1	0	-1	63.69
11	-1	0	1	69.50
12	0	-1	-1	72.04
13	0	1	1	96.12
14	0	1	-1	89.47
15	0	0	0	87.41
16	1	-1	0	74.10
17	1	0	-1	88.52

方差来源	平方和	自由度	均方差	F值	P值
模型	2 531.24	9	281.25	4 069.38	<0.000 1**
A	1 140.27	1	1 140.27	16 498.38	<0.000 1**
B	752.14	1	752.14	10 882.62	<0.000 1**
C	49.90	1	49.90	722.00	<0.000 1**
AB	0.66	1	0.66	9.61	0.017 3*
AC	0.77	1	0.77	11.20	0.012 3*
BC	2.53	1	2.53	36.58	0.000 5**
A²	433.29	1	433.29	6 269.21	<0.000 1**
B²	124.11	1	124.11	1 795.78	<0.000 1**
C²	9.08	1	9.08	131.33	<0.000 1**
残差	0.48	7	0.069
失拟项	0.30	3	0.099	2.11	0.241 7
净误差	0.19	4	0.047
总离差	2 531.73	16

实验编号	锂萃取率			相对误差
实验编号	实验值	平均值	预测值	相对误差
1	91.62	91.42	92.39	1.05
2	91.21
3	91.44

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on optimization of synergistic lithium extraction process of tributyl phosphate-ethyl butyrate system by response surface method

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