Research progress of oxidation mechanism in the chloride process for titanium dioxide production

doi:10.16085/j.issn.1000-6613.2017-0781

Abstract

Abstract: Chlorination is the main method of producing high-grade rutile titanium white. The products has good quality and the process is of low environmental pollution, high degree of automation,and low comprehensive energy consumption,and has the very high application value in the field of titanium white production and development prospects,but the oxidation reaction mechanism of titanium tetrachloride is still unknown. So the study of titanium tetrachloride oxidation reaction mechanism becomes a research and development focus. The paper elaborates the development, present situation and basic principle of the chlorination process. It is pointed out that the oxidation reaction mechanism of titanium tetrachloride has guiding significance for the oxidation reactor design and scale,the product morphology control and scar preventing.

Key words: chlorination process, titanium white, oxidation, reaction kinetics, nucleation, additive

摘要： 氯化法是国际上生产高档金红石钛白的主要方法，具有产品质量好、环境污染小、自动化程度高、综合能耗低等优点，在钛白生产领域具有很高的应用价值和发展前景，但对于四氯化钛的氧化反应机理却尚未明确，因此探明四氯化钛氧化反应机理已成为氯化法钛白生产技术的研发重点。本文从表观反应机理、微观反应机理角度论述四氯化钛氧化反应机理研究概况，并对二氧化钛的气相成核、晶核表面生长及三氯化铝的作用机制等研究进展进行分析，展望四氯化钛微观氧化反应机理的研究方向。最后指出，四氯化钛氧化反应机理的研究对氧化反应器的放大设计、产品的形态控制、避免结疤等工业生产具有重要指导意义。

关键词: 氯化法, 钛白, 氧化, 反应动力学, 成核, 添加剂

CLC Number:

TF823

HUANG Jun, LI Rongxing, TIAN Lin, YU Xiaohua, HOU Yanqing, LI Wei. Research progress of oxidation mechanism in the chloride process for titanium dioxide production[J]. Chemical Industry and Engineering Progress, 2018, 37(03): 1054-1061.

黄俊, 李荣兴, 田林, 俞小花, 侯彦青, 李威. 氯化法钛白生产工艺中四氯化钛氧化微观反应机理研究进展[J]. 化工进展, 2018, 37(03): 1054-1061.

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