利用废硅藻土制备白炭黑  

Preparation of White Carbon from Waste Diatomite

作　　者：张大捷[1] 郭婷婷[2] 侯浩波[2] 郑学根[3] 

机构地区：[1]武汉科技学院环境与城建学院,湖北武汉430073 [2]武汉大学资源与环境科学学院,湖北武汉430079 [3]中国石油化工股份有限公司安庆石化分公司,安徽安庆246001

出　　处：《化工环保》2009年第1期54-57,共4页Environmental Protection of Chemical Industry

摘　　要：以废弃硅藻土为原料,采用硫酸酸浸除杂、氢氧化钠合成硅酸钠、硫酸酸化,再经清洗、干燥等步骤,制得白炭黑。考察了不同因素对制备效果的影响。实验结果表明,酸浸最佳工艺条件为:硫酸质量分数17%,酸浸温度40℃,液固比(硫酸溶液与废弃硅藻土的质量比)3.0∶1;碱处理最佳工艺条件为:碱加入量(氢氧化钠与酸浸后硅藻土的质量比)0.4,碱处理时间60min。在此条件下制备出的白炭黑的总产率可达46.7%,产品质量符合HGT3061—1999《橡胶配合剂沉淀水合二氧化硅技术条件》中的D类标准,可实现废弃硅藻土的资源化利用。White carbon was prepared from waste diatomite via impurities-removing with sulfuric acid leaching, sodium silicate synthesis with sodium hydroxide, acidification with sulfuric acid, washing and drying, etc. The factors affecting the preparation were studied. The optimum conditions for acid leaching are as follows： sulfuric acid mass fraction 17%, acid leaching temperature 40 ~C and mass ratio of sulfuric acid to waste diatomite 3.0： 1 ; The optimum conditions for alkaline treatment are as follows： mass ratio of sodium hydroxide to waste diatomite 0.4, alkaline treatment time 60 min. Under these conductions, the total yield of white carbon is 46.72%. The product quality can meet the D grade standard of HGT3061 - 1999. This technology can achieve the reuse of waste diatomite.

关 键 词：硅藻土 固体废物 白炭黑 硅酸钠 水合二氧化硅 综合利用 

分 类 号：X789[环境科学与工程—环境工程]