Longbai Group has obtained a new patent that can transform difficult to handle ferrous ferrite into ferrous sulfate heptahydrate that is easy to be used downstream

On November 17, 2023, according to the announcement of the State Intellectual Property Office, Longbai Group Co., Ltd. obtained a project titled "A Titanium Dioxide Waste Acid Concentration System" with the publication number CN220026112U, and the patent application date is 2023.

The patent abstract shows that the utility model discloses a titanium dioxide waste acid concentration system, which comprises a beating tank, a first solid-liquid separation device, a heat exchanger, a vacuum evaporation concentration system, a crystallization tank and a second solid-liquid separation device which are connected in sequence; a secondary steam transmission pipeline is arranged between the vacuum evaporation concentration system and the heat exchanger; a ferrous sulfate monohydrate reflux pipeline is arranged between the second solid-liquid separation device and the beating tank. The titanium dioxide waste acid concentration system provided by the present application can convert difficult ferric yellow (ferrous sulfate monohydrate) produced by traditional concentration technology into ferrous sulfate heptahydrate, which can be directly used for downstream applications, such as preparing ferric phosphate or polyferric. Moreover, the method has simple process and short flow, can greatly save energy consumption, and is easy to industrial production.