氨循环法制备阻燃剂型氢氧化镁
Study on Preparation of Flame Retardant Magnesium Hydroxide by Ammonia Circulation Method
徐少伟 1李雪1
作者信息
- 1. 沈阳化工大学化学工程学院,辽宁沈阳 110142
- 折叠
摘要
在实验室条件下,采用轻烧粉与铵盐反应制得精制盐溶液,在一定温度和搅拌速率下,将一定流量的氨气通入到镁盐溶液中,利用直接沉淀法制备高品质阻燃剂型氢氧化镁,并考察了反应温度、通氨量、沉镁时间和搅拌速率等因素对氢氧化镁形貌的影响.利用真空扫描电子显微镜(SEM)和激光粒度分布仪等手段对产品的形貌、粒度进行表征.实验结果表明:沉镁反应以250 mL体系为基准,当通氨反应温度为60 ℃,通氨量为200 mL/min,搅拌速率为250 r/min,反应时间2 h时,可以制备出形貌一致、分散性良好的氢氧化镁.
Abstract
Under laboratory conditions,a refined salt solution was prepared by reacting lightly burned powder with ammonium salt.A certain flow rate of ammonia gas was introduced into the magnesium salt solution at a certain temperature and stirring rate.High quality flame retardant magnesium hydroxide was prepared by direct precipitation method.The effects of reaction temperature,ammonia flux,magnesium settling time and stirring rate on the particle size morphology of magnesium hydroxide were studied.The morphology and partide size and shape of the product were characterized by techniques such as vacuum scanning electron microscope(SEM)and laser particle size distributor.The experimental results showed that the magnesium precipitation reaction was based on 250 mL system.When the reaction temperature was 60 ℃,the ammonia penetration rate was 200 mL/min,and the stirring speed was 250 r/min,flake magnesium hydroxide with consistent morphology and good dispersion could be prepared at 2 h.
关键词
氢氧化镁/直接沉淀法/表征Key words
magnesium hydroxide/direct sedimentation/characterization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据