仲丁醇铝水解制备高纯拟薄水铝石

doi:10.19964/j.issn.1006-4990.2021-0660

Abstract

Abstract:

High purity pseudo-boehmite was prepared by hydrolysis of aluminium sec-butoxide.The effect of hydrolysis temperature，water dosage，hydrolysis time，and drying temperature on dispersion index was investigated.The X-ray diffraction（XRD） and infrared spectroscopy（IR） characterization were carried on to analyze the structure of product.The results showed that hydrolysis temperature，water dosage，hydrolysis time and drying temperature affected the dispersion index of the product，and the effect of hydrolysis temperature and water dosage were more obvious.The increase of hydrolysis temperature was beneficial to the growth of pseudo-boehmite crystal，and the peptizing property of products at low temperature was poor.With the increase of water dosage，the crystal form of the product was continuously improved，from the initial amorphous form to the pseudo-boehmite phase，respectively crystalline rises and the dispersion index of the product increased accordingly.Prolonging the hydrolysis time was beneficial to the grain growth of pseudo-boehmite and the increase of dispersion index.And the drying temperature had less effect on the crystallization and dispersion index.The optimal hydrolysis conditions were obtained as follows：the molar ratio of aluminum sec-butoxide to water was 1∶4.0，the hydrolysis stirring time was 2 h，and the hydrolysis temperature and drying temperature were 110 ℃.In order to further improve the dispersion index index of the product，hydration of the hydrolyzed product was used to optimize the dispersion index up to 99.6%.At the same time，other technical parameters of the optimized product were comparable with SB powder.This study provided a research basis for the industrialization of the preparation of pseudo-boehmite by the hydrolysis of aluminium sec-butoxide.

Key words: aluminum sec-butoxide, high purity pseudo boehmite, dispersion index

CLC Number:

TQ133.1

LI Fan,YANG Yuzhe,TIAN Peng,LI Wei,NING Guiling. Preparation of high purity pseudo-boehmite by hydrolysis of aluminium sec-butoxide[J]. Inorganic Chemicals Industry, 2022, 54(7): 78-84.

Figures/Tables 11

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水解温度/℃	水解温度/℃	胶溶指数/%
30	75	30.67
45	90	46.90
60	110	92.33

水解时间/h	胶溶指数/%	水解时间/h	胶溶指数/%
0.0	58.21	2.0	92.64
0.5	73.16	3.0	94.47
1.0	78.23	4.0	95.24
1.5	90.73

干燥温度/h	胶溶指数/%	干燥温度/h	胶溶指数/%
80	95.31	110	92.64
90	92.33	120	93.92
100	93.80

序号	水解温度/℃	水用量	水解时间/h	干燥温度/℃	胶溶指数/%	残碳量/ %
1	110	1∶4.0	1.5	110	90.73	3.41
2	110	1∶4.0	2.0	110	92.64	2.43
3	110	1∶4.0	3.0	110	94.47	2.47
4	110	1∶4.0	4.0	110	95.24	2.48
5	110	1∶3.5	2.0	110	92.09	3.32
6	110	1∶5.0	2.0	110	96.09	2.17
7	110	1∶4.0	2.0	120	93.92	2.95
8	110	1∶4.0	2.0	100	93.80	2.73
9	110	1∶4.0	2.0	90	92.33	3.18
10	110	1∶4.0	2.0	80	95.31	9.55

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Preparation of high purity pseudo-boehmite by hydrolysis of aluminium sec-butoxide

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