| abstract |
The invention discloses a kind of preparation methods of copper-chrome black, using Gerhardite, Chromium nitrate (Cr(NO3)3),nonahydrate as raw material, carry out coprecipitation reaction with excessive urea and Co-precipitation Precursor is made；Then burning pretreatment is carried out to the Co-precipitation Precursor, obtains predecessor pretreatment product；The predecessor pretreatment product is calcined, copper-chrome black is obtained.This invention simplifies preparation process; discharge and the complete precipitating reagent pollution on the environment of unreacted of waste water and waste ethanol are avoided simultaneously; environmentally friendly protection simultaneously reduces production cost; and obtained product purity is high, particle is uniform, crystal form is complete, is conducive to the progress and development for promoting and applying and promoting copper-chrome black technology. |