lithopone red pigments suppliers

Lithopone, a versatile and widely used white pigment, is a blend of zinc sulfide (ZnS) and barium sulfate (BaSO4). This unique combination offers exceptional optical properties, making it an essential ingredient in various industries, particularly in paints, plastics, printing inks, and paper coatings. As a key player in the global market, lithopone ZnS-BaSO4 suppliers play a crucial role in ensuring consistent quality and availability to meet the ever-growing demand.

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The raw material used in this method is FeSO4. In order to maintain the Fe3 + concentration in the reaction medium in a specific range, reducing agent iron sheet is added in the reaction process. Iron yellow crystal seed was added and air was introduced to synthesize iron yellow under certain pH conditions. The method mainly includes two steps: (1) firstly, FeSO4 · 7H2O is used as raw material, NaOH or NH3 · H2O is used as precipitant or pH regulator, and air is used as oxidant to prepare crystal seed; (2) Iron yellow is produced by two-step oxidation with crystal seed, FeSO4, iron sheet and air.

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In addition, with the increasing demand for zinc compounds and lithopone, the continuous exploitation of zinc resources in China, the increasingly poor, fine and complex mineral resources, the comprehensive utilization and environmental protection requirements continue to improve, people have begun to study the recovery of low-zinc raw materials. Use technology. The so-called low-zinc raw materials are mainly low-grade zinc oxide ore, but in addition to low-grade oxidation In addition to zinc in zinc ore, zinc is also present in the acid leaching residue.

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