On August 21, 2024, Tianyan's intellectual property information showed that Longbai Group Co., Ltd. applied for a project titled "A Method for Continuous Washing of Titanium Dioxide by Sulfuric Acid Method" with the Publication Number CN202410526991.0, and the application date is 2024. April.

The patent abstract shows that the present application discloses a method for continuous water washing of titanium dioxide by sulfuric acid method, which comprises the following steps: S1. First washing: conveying the hydrolyzed material to a filter press for primary washing;S2. Reduction treatment: after the primary washing, circulating a soluble organic reductant solution to the filter press for reduction treatment;S3. Second washing: after the cycle, using deionized water to carry out secondary washing until the secondary washing is qualified. The method provided by the present application can continuously carry out primary washing, cyclic bleaching reduction and secondary washing by using a filter press to realize continuous water washing of titanium dioxide. The method is continuously operated and has a high degree of automation, which can improve production capacity and reduce the number of equipment. At the same time, the addition of Ti3 + solution, 98% sulfuric acid and the use of steam in the bleaching stage are reduced, significantly reducing production costs.