超重力法制备超细改性氢氧化铝的中试实验研究

Preparation of ultrafine modified aluminium trihydrate with high gravity reaction through pilot plant test

采用超重力碳分联合水热改性的方法制得到超细改性氢氧化铝(ATH)。讨论了超重力及水热和成法制备超细改性ATH从小试到中试的实验,分析了放大准则并对各个过程的产品作TEM表征及TG测试。结果显示放大过程中未产生对产品性能有不利影响。100t/a的中试得到了粒径相对较小的氢氧化铝阻燃剂,其失重曲线的特征是产品的失重(脱水)在330℃之后,300℃到500℃的整体失重率达到48％～51％。

The ultrafine ATH(aluminium trihydrate) was prepared by a new method combined with high gravity reaction and thermal hydrolysis. The experimental processes from a small-scale experiment to pilot-plant test and the scale-up principle were discussed. The principle of scale-up was analyzed, and the product was characterized by TEM and TG. The results show that there is no negative effect from the scale-up process on the product's performances. The pilot-plant test to prepare ultrafine modified ATH with high gravity reaction and thermal hydrolysis is a success, and the technique has advantages such as in high productivity, small granularity, even distribution and fine dispersion.