异辛醇铝水解制备高纯拟薄水铝石的研究
收稿日期: 2024-08-05
网络出版日期: 2025-10-27
基金资助
国家重点研发计划项目(2021YFA1500301)
Study on synthesis of high purity pseudoboehmite by hydrolyzing isooctanol aluminum
Received date: 2024-08-05
Online published: 2025-10-27
以异辛醇铝为原料制备高纯拟薄水铝石能够解决目前工业上使用异丙醇铝水解堵塞管路和醇水分离能耗高的问题。通过改变异辛醇铝水解制备高纯拟薄水铝石过程中的水解温度、水解时间、陈化温度、陈化时间，并结合XRD分析产物的晶相，研究不同水解条件对拟薄水铝石胶溶指数和成胶时间的影响。结果表明：水解温度、水解时间、陈化温度及陈化时间的改变都会影响拟薄水铝石胶溶性能，其中水解温度的影响最为明显；95 ℃水解所得拟薄水铝石的胶溶指数可达99.9%以上，成胶时间最短为8 s；95 ℃水解后，不同陈化时间和陈化温度对产物的胶溶指数无明显影响，均可达到99.9%以上。为进一步提高产物的胶溶性质，将水解后产物在110 ℃纯水体系下处理，成胶时间缩短至5 s左右，表现出与商用高纯拟薄水铝石（SB粉）相媲美的各项技术参数。该研究为实现异辛醇铝水解制备高纯拟薄水铝石的规模化生产提供了研究基础。
田朋 , 焦丹丹 , 李凡 , 宁桂玲 . 异辛醇铝水解制备高纯拟薄水铝石的研究[J]. 无机盐工业, 2025 , 57(10) : 49 -54 . DOI: 10.19964/j.issn.1006-4990.2024-0436
The preparation of high-purity pseudo boehmite using aluminum isooctanol as raw material can solve the problems of pipeline blockage and high energy consumption in alcohol water separation caused by the hydrolysis of aluminum isopropoxide in industry.The influence of different hydrolysis conditions on the solubility index and gelation time of pseudo boehmite was studied by changing the hydrolysis temperature，hydrolysis time，aging temperature，and aging time during the preparation of high-purity pseudo boehmite by hydrolysis of isooctanol aluminum and combining XRD analysis of the crystal phase of the product.The results showed that changes in hydrolysis temperature，hydrolysis time，aging temperature，and aging time all affected the solubility of pseudo boehmite，with hydrolysis temperature having the most significant effect.The solubility index of pseudo boehmite obtained by hydrolysis at 95 ℃ could reach over 99.9%，and the shortest gelation time was 8 seconds.After hydrolysis at 95 ℃，different aging times and temperatures had no significant effect on the solubility index of the product，which could reach over 99.9%.To further improve the solubility of the product，the hydrolyzed product was treated in a pure water system at 110 ℃，and the gelation time was shortened to about 5 seconds，exhibiting various technical parameters comparable to commercial high-purity pseudo boehmite（SB powder）.This study provided a research foundation for the large-scale production of high-purity pseudo boehmite prepared by hydrolysis of isooctanol aluminum.
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