Development of a Safe and Environmentally Friendly Sulfate Process for the Production of Titanium Oxide,Industrial & Engineering Chemistry Research

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Development of a Safe and Environmentally Friendly Sulfate Process for the Production of Titanium Oxide
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-01-20 , DOI: 10.1021/acs.iecr.1c03364
Mohammad Hasan Sadeghi ₁ , Mohsen Nasr Esfahany ₁

Affiliation

The current research was aimed at developing a safe and more environmentally friendly sulfate process for the production of titanium oxide. In this process, to leach titanium from ilmenite by relatively dilute sulfuric acid (50 wt %), a two-step leaching scheme using a series of stirred tank reactor (STR) and vertical stirred media reactors (SMRs) was devised for carrying out the chemical reaction and particle activation, respectively. The proposed modified sulfate process (MSP) efficiency was 76.5%. The amount of sulfuric acid discarded (100 wt %) from the hydrolysis step per ton of TiO₂ was about 100 kg, while this is about 1000 kg in the conventional sulfate process. About 600 kg of quick lime per ton of TiO₂ is also saved in the waste acid neutralization section, which ultimately reduces the production of scrap gypsum by about 1700 kg/ton TiO₂. The cost balance indicated that processing by the MSP brings about 185 US $/ton TiO₂ profit.

中文翻译：

开发安全环保的硫酸法生产氧化钛

目前的研究旨在开发一种安全且更环保的硫酸盐工艺来生产二氧化钛。在这个过程中，为了通过相对稀的硫酸（50 wt%）从钛铁矿中浸出钛，设计了一种使用一系列搅拌釜反应器（STR）和立式搅拌介质反应器（SMR）的两步浸出方案来进行分别是化学反应和粒子活化。提议的改良硫酸盐工艺 (MSP) 效率为 76.5%。每吨TiO ₂从水解步骤丢弃的硫酸量(100wt％)约为100kg，而在常规硫酸盐工艺中约为1000kg。_{每吨 TiO 2}约 600 kg 生石灰废酸中和工段也省去，最终减少废石膏产量约1700公斤/吨TiO ₂。成本结余表明，MSP 加工带来约 185 美元/吨 TiO ₂利润。

更新日期：2022-02-02

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