苦卤制备硼酸镁(Mg_2B_2O_5)晶须的研究  

Preparation of Magnesium Borate (Mg_2B_2O_5) Whisker Using Bitter Brine

作　　者：张旖[1] 王俐聪[1] 王玉琪[1] 张雨山[1] 黄西平[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《化学工业与工程》2010年第2期128-131,共4页Chemical Industry and Engineering

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(G2008-11);国家"十一五"科技支撑计划项目(2006BAB03A11)

摘　　要：以苦卤、硼酸、氢氧化钠为原料，采用高温助熔剂工艺制备了硼酸镁（Mg2B2O5）晶须。系统研究了苦卤的脱色、镁硼比例以及成核方式对晶须组成和形貌的影响。结果表明：在苦卤体积确定的情况下，脱色剂次氯酸钠的加入量在0．2～1．0mL之间时，色度去除率随着脱色剂加入量的增加而增大；镁硼比例为0．50和0．67时合成产物为Mg2B2O5；在相同的试验条件下，与籽晶法生长晶须相比较，自发成核制备的晶须细而短，实际应用中可根据需要制备所需形貌的晶须。Magnesium borate （Mg2B2O5 ） whisker was successfully synthesized via high temperature flux method using bitter brine, boric acid and sodium hydroxide as raw materials. Influences of decoloring of bitter brine, ratio of magnesium to boron, nucleation method on composition and morphology of magnesium borate whisker were investigated. The results showed that the removal rate of chroma increased with the volume of sodium hypochlorite from 0. 2 to 1.0 mL when volume of bitter brine was fixed. Mg2B2O5 was gained when the ratios of magnesium to boron were 0.50 and 0.67. Compared with seeded method, spontaneous nucleation method made the whisker short and slim. In practice, it is possible to prepare whisker according to the needed size.

关 键 词：苦卤 助熔剂工艺 硼酸镁晶须 

分 类 号：TQ132.2[化学工程—无机化工]