无机酸分步沉淀法制备食品级白炭黑的工艺研究

doi:１０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０５．０１５

昆明冶金高等专科学校学报 ›› 2020, Vol. 36 ›› Issue (5): 73-.DOI: １０．３９６９／ｊ．ｉｓｓｎ．１００９－０４７９．２０２０．０５．０１５

无机酸分步沉淀法制备食品级白炭黑的工艺研究

张金梁，卢萍，张凤霞，黄卉

(1.昆明冶金高等专科学校冶金与矿业学院，云南昆明 650033;2.昆明市稀散及贵金属资源综合利用重点实验室，云南昆明 650033:
3.昆明理工大学冶金与能源工程学院，云南昆明 650093)

收稿日期:2020-06-22 出版日期:2020-10-27 发布日期:2023-12-14
作者简介:张金梁（１９８７－），男，云南大理人，讲师，工学博士研究生，主要从事纳米粉体制备研究。
基金资助:
云南省应用基础研究计划：微硅粉碳化酸化联合沉淀法制备食品级白碳黑的基础工艺研究（２０１７ＦＤ１２８）；昆明冶金高等专科学校科研基金项目：纳米ＳｉＯ２碳化沉淀过程中其表面改性的基础工艺研究（２０１９ＸＪＺＫ０６）。

Study on Preparation of Food Grade Silica by Fractional Precipitation of Inorganic Acid

ZHANG Jinliang，LU Ping, ZHANG Fengxia，HUANG Hui

(1. Faculty of Metallurgy and Mining Engineering, Kunming Metallurgy College, Kunming 650033, China;2. Kunming Key Laboratory of Comprehensive Utilization Resources of Rare and Precious Metals, Kunming 650033, China;3. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China)

Received:2020-06-22 Online:2020-10-27 Published:2023-12-14

摘要/Abstract

摘要： 通过“前期硫酸沉淀一后期碳化沉淀”分步沉淀工艺制备食品级白炭黑，考察了硫酸化终点 pH、前驱体Na,SiO,浓度、反应温度、PEC 6000 添加量等工艺条件对产品白炭黑性能的影响。研究表明，无机酸分段沉淀法最佳工艺条件为:硫酸化阶段终点 H 值为9.5、前驱体 Na,Si0的质量浓度为 40g/L、反应温度为 80添加剂 PEC 6000 的加入量为2g/L。在此条件下，产品的比表面积和 DBP 吸油值分别为 232.7m/g和2.87 cm/g，达到国家标准食品级白炭黑的要求。

关键词: 食品级白炭黑, 分步沉淀工艺:比表面积, DBP 吸油值

Abstract: In this paper, food grade silica was prepared by fractional precipitation process of prophasesulfuric acid precipitation and late carbonization precipitation. The influences of the end point pH of sulfuric acid precipitation, Na,Si0, concentration, reaction temperature and PEC 6000 addition amount onthe properties of silica were investigated. The results showed that the optimum conditions for the fraction-al precipitation of inorganic acid were: pH value of the end point of sulfuric acid precipitation was 9.5the concentration of Na,Si0, was 40 g/L, the reaction temperature was 80°C , and the additive PEC 6000was 2 g/L. Under this condition, the specific surface area and DBP oil absorption value of the productare 232. 7 m'/g and 2.87 cm’/g respectively, which meet the requirements of national food grade silica.

Key words: food grade silica, fractional precipitation process, specific surface, DBP absorption value

中图分类号:

TQ170.1

张金梁, 卢萍, 张凤霞, 黄卉. 无机酸分步沉淀法制备食品级白炭黑的工艺研究[J]. 昆明冶金高等专科学校学报, 2020, 36(5): 73-.

ZHANG Jinliang, LU Ping, ZHANG Fengxia, HUANG Hui. Study on Preparation of Food Grade Silica by Fractional Precipitation of Inorganic Acid [J]. Journal of Kunming Metallurgy College, 2020, 36(5): 73-.

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无机酸分步沉淀法制备食品级白炭黑的工艺研究

Study on Preparation of Food Grade Silica by Fractional Precipitation of Inorganic Acid

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