Method for producing pigment-level iron oxide red by using titanium dioxide waste residue ferrous sulfate

Abstract

The invention discloses a method for producing pigment-level iron oxide red by using titanium dioxide waste residue ferrous sulfate and belongs to the technical field of chemical industry. The pigment-level iron oxide red with excellent performance can be prepared by the method. The method comprises the following steps of: a, removing impurities from the titanium dioxide waste residue ferrous sulfate to prepare a ferrous sulfate solution; b, oxidizing the ferrous sulfate in the solution obtained in the step a to obtain an iron oxide black sediment, and filtering to obtain a filter cake and a filtrate; and c, washing, drying and crushing the filter cake obtained in the step b, and calcining the crushed filter cake to obtain the pigment-level iron oxide red, preferentially, the crushed filter cake is calcined under an aerobic condition, wherein the calcining temperature is 600 to 750 DEG C, and the calcining time is 45 to 60 minutes. The method is low in raw material cost and low in environment pollution; the prepared product has the advantages of bright color and luster, and high tinting strength, oil absorption and dispersibility; and the yield reaches the top standard of an iron oxide red pigment stated by GB 1863-89.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes an effective way to make pure or colored magnetic iron nitrogen complex salt without any harmful chemical substances like mercury salts. By doing it with certain materials instead of expensive ones, these processes become more efficient at producing higher quality magnetite particles than previous methods. Additionally, there're technical benefits such as eliminating excessive use of environmentally friendly solvents during the sintered procedure while maintaining desired properties of the final product.

Problems solved by technology

Technological Problem addressed in this patents relates to producing highly concentrated black colored FeO nanoparticle powder called ferrite yellow without containing excessive amounts of fused tin chlorine during manufacturing processes due to their volatility and instability when exposed to various environments like humors. Existing technologies require expensive materials and consume significant resources while generating harmful substances. Therefore, an improved approach needs to develop new techniques for efficiently producing these valuable compounds.