本文選題：化學(xué)法 + 微粉氫氧化鋁　； 參考：《西安建筑科技大學(xué)》2010年碩士論文

【摘要】：氫氧化鋁微粉一般是指中位粒徑(d50)為0.5-2μm的氫氧化鋁。產(chǎn)品粒度細、粒子的比表面積大、分散性好,具有良好的填充性、阻燃、消煙三大功能,無毒無嗅、不產(chǎn)生二次污染,已成為合成材料無鹵阻燃配方的主要選材之一。近年來國內(nèi)外對阻燃劑氫氧化鋁微粉的需求量急劇增加,研制開發(fā)微粉氫氧化鋁阻燃劑具有廣闊的市場應(yīng)用前景。 本文針對化學(xué)法制備微粉氫氧化鋁工藝,即采取液液反應(yīng)直接制備氫氧化鋁晶種,后與鋁酸鈉溶液進行種分反應(yīng)獲得產(chǎn)品,重點研究了種子液制備溫度、種子液制備原料加入方式、種子液制備反應(yīng)終點、種子液存放時間和種子液與鋁酸鈉溶液加入比例、誘導(dǎo)劑制備溫度、誘導(dǎo)劑加入量及加入方式等因素對種分得到微粉氫氧化鋁物化性能的影響,得到了優(yōu)化工藝條件,并進行了半工業(yè)化試驗,最終制備出粒度(d50)0.8-1.5μm,白度97%,SiO20.02%,Fe2O30.01%,Na2O0.30%,電導(dǎo)率100μs.cm-1,吸油量≤40mL／100g,顆粒表面光滑、粒度分布集中的高質(zhì)量微粉氫氧化鋁產(chǎn)品。
[Abstract]:Alumina hydroxide powder usually refers to aluminum hydroxide with a median diameter of 0.5-2 渭 m. The product has fine particle size, large specific surface area, good dispersity, good filling property, flame retardant, smoke elimination, non-toxic and odorless, no secondary pollution, and has become one of the main selection materials for halogen-free flame retardant formulation. In recent years, the demand for flame retardant alumina hydroxide powder has been increasing rapidly, so the development of aluminum hydroxide flame retardant has a broad market application prospect. In this paper, the preparation process of micro-powder aluminum hydroxide by chemical method, that is, the direct preparation of aluminum hydroxide seed by liquid-liquid reaction, and the seed separation reaction with sodium aluminate solution were carried out to obtain the product, and the preparation temperature of seed solution was studied emphatically. The method of adding raw material to seed liquid preparation, the reaction end point of seed liquid preparation, the storage time of seed liquid and the proportion of seed liquid to sodium aluminate solution, the preparation temperature of inducer, The effects of the amount of inducer and the method of adding on the physical and chemical properties of the fine powder aluminum hydroxide were obtained, and the process conditions were optimized, and the semi-industrial test was carried out. Finally, high quality aluminum hydroxide products with fine particle size (d50) 0.8-1.5 渭 m, brightness 97% SiO 20.02 and Fe _ 2O _ 3 0.01 / Na _ 2O _ 0.30, electrical conductivity 100 渭 s 路cm ~ (-1), oil absorption 鈮，

本文編號：2060685