Method for manufacturing goethite pigment

摘要

Steps: a) Dissolving ferric nitrate (III) in water, b) Treating the solution obtained according to step a) at a temperature in the range of 55 ° C. to 65 ° C., c) According to step b). Step of isolating gateite from the obtained suspension, d) step of suspending gateite isolated in step c) in water, e) step d) suspension of step d) under self-sustaining pressure 120 A method for producing gateite, which comprises a step of hydrothermally treating at a temperature of about 220 ° C., preferably 150 to 200 ° C.