{"id":24013,"date":"2025-11-08T15:04:22","date_gmt":"2025-11-08T07:04:22","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&p=24013"},"modified":"2025-11-08T15:10:15","modified_gmt":"2025-11-08T07:10:15","slug":"the-evolution-of-tio2-manufacturing-existing-and-emerging-technologies","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/id\/new\/the-evolution-of-tio2-manufacturing-existing-and-emerging-technologies\/","title":{"rendered":"The Evolution of TiO2 Manufacturing: Existing and Emerging Technologies"},"content":{"rendered":"

Titanium dioxide (TiO2)<\/strong>, commonly known as titanium white<\/strong>, is one of the most widely used white pigments in industries ranging from paints and coatings to plastics, paper, and cosmetics. As global demand continues to rise, manufacturers are increasingly focused on optimizing production processes to improve efficiency, reduce environmental impact, and enhance product quality. This article explores both conventional and emerging technologies in titanium dioxide manufacturing, highlighting key advancements shaping the future of this essential industrial material.<\/p>\n

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\"titanium-dioxide\"<\/a>
titanium-dioxide<\/figcaption><\/figure>\n

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Titanium Dioxide Production Process Technology<\/h2>\n

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<\/b>1. Overview of Existing Processes<\/h3>\n

In titanium dioxide production, the primary titanium ore<\/a> raw materials used include rock ores and sand ores. These materials undergo a series of mineral processing steps\u2014such as gravity separation, magnetic separation, and electrostatic separation<\/strong>\u2014to refine them into high-titanium slag. Subsequently, through advanced processing steps<\/b><\/strong> like iron reduction and chemical treatment, the final product is synthetic rutile<\/b><\/strong>, a key intermediate in titanium dioxide manufacturing.<\/p>\n

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\u25c6 Sulfuric Acid Process<\/h4>\n

The history of titanium dioxide production via the sulfuric acid process dates back to 1918. Today, sulfuric acid-based titanium dioxide rivals chloride-process titanium dioxide in product quality <\/b><\/strong>and is favored for its ability to cost-effectively produce anatase titanium dioxide. In Europe, up to 70% of titanium dioxide production employs the sulfuric acid process. The following is a process flow diagram for sulfuric acid-based titanium dioxide production<\/b><\/strong>:<\/p>\n

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\"Sulfuric<\/a><\/p>\n

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The modern advanced sulfuric acid processes have achieved effective treatment and recycling of waste acid, waste gas, and wastewater.<\/p>\n

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\u25c6 Chlorination Process<\/h4>\n

Advanced chlorination processes have comprehensively optimized chlorine recycling and waste treatment. When producing titanium dioxide from rutile ore<\/a>, recovery rates typically reach 93% to 95%. while using a mixed ore of titanium concentrate and ilmenite yields a recovery rate of approximately 90%. Notably, the recovery rate of titanium dioxide from titanium slag exceeds that from rutile<\/b><\/strong>, primarily because both slag and natural rutile possess larger particle sizes, resulting in less fine powder being carried away during chlorination. To address this issue, researchers have developed a novel circulating fluidized bed chlorination reactor.<\/p>\n

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\"Chlorination<\/a><\/p>\n

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The chlorination process comprises three primary stages: chlorination, oxidation, and post-treatment. This method is regarded as the future direction for titanium dioxide production technology. The entire titanium dioxide production process using this method can be divided into three key segments: the chlorination stage, the oxidation stage, and the post-treatment section.<\/p>\n

During the chlorination stage, high-purity coke is mixed with ore and reacts chemically with chlorine gas at high temperatures to produce titanium chloride containing significant impurities\u2014namely, crude TiCl\u2084. Subsequently, chemical treatment agents or distillation methods are employed to refine the crude TiCl\u2084, removing various ions such as chromium, manganese, iron, and vanadium. The refined titanium tetrachloride requires further oxidation to convert into titanium dioxide. Finally, the reaction product is quenched with low-temperature circulating chlorine gas to extract titanium dioxide from the gas. This is followed by dechlorination to obtain pure titanium dioxide.<\/p>\n

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<\/b>2. New Production Process<\/h3>\n

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\u25c6 REPTILE Process<\/h4>\n

The REPTILE process is an innovative titanium dioxide production method that incorporates chlorination. It partially chlorinates iron in titanium concentrate to form ferric chloride, which then undergoes oxidation to yield iron oxide and chlorine gas. The generated chlorine gas is recycled back into the chlorination system for reuse. This process simultaneously yields rutile and iron oxide products during raw material processing.<\/p>\n

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\u25c6 ERMSSR Process<\/h4>\n

The ERMSSR process, meticulously developed and successfully demonstrated in industrial trials by Australia’s AUSTPAC, represents an innovative acid-cycle, zero-waste method for producing synthetic rutile. <\/b><\/strong>The rutile produced by this process exhibits exceptional particle fineness, comparable to natural rutile. The entire process comprises two key components: first, the roasting and magnetic separation of ilmenite, abbreviated as ERMS; second, the waste acid recovery system, known as EARS.<\/p>\n

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\u25c6 Altair Hydrochloric Acid Process<\/h4>\n

The Altair hydrochloric acid process for titanium dioxide production offers multiple advantages, enabling the manufacture of both rutile and anatase titanium dioxide, as well as the further preparation of nano-sized titanium dioxide. During production, ferrous chloride separated after cooling and crystallization undergoes pyrolysis to convert into solid iron oxide. The generated hydrogen chloride gas and water vapor are recovered and reintroduced into the initial decomposition process, achieving a closed-loop circulation of hydrochloric acid<\/b><\/strong>. The only byproduct of this process is iron oxide slag, which requires no deep-well disposal and can be directly used as raw material for steel or other iron-based products, thereby reducing production costs. Additionally, this process features low titanium raw material costs, reduced energy consumption, simplified process conditions, and flexible production capabilities.<\/p>\n

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\u25c6  Alkali Leaching Process<\/h4>\n

The alkali leaching process involves roasting ilmenite with alkali at high temperatures between 850 and 875\u00b0C, followed by extraction using organic acids to effectively remove impurities. After this series of steps, synthetic rutile is obtained. In the chlorination process for producing titanium dioxide, this material consumes only one-twentieth of the chlorine required by traditional methods.<\/b><\/strong> Notably, several Chinese research institutions have conducted in-depth studies on the alkali fusion process.<\/p>\n