The invention discloses a method for preparing cuprous
oxide and belongs to the technical field of cuprous
oxide preparation.The method includes the steps that bottom mud of a
metallurgy sewage treatment
plant is collected, after the bottom mud is mixed with water and a
mercury nitrate solution and centrifuged, supernate containing mercury
clostridium is obtained, then a culture solution is prepared from methyl
cobalt ammonia,
glycine betaine and the like, rocking
bed shaking culture is conducted on the culture solution, after standing and filtering are conducted, triphosadenine is added to filtrate and mixed,
diethyl ether is added for extraction,
formaldehyde is added to extraction liquor, after anaerobic reduction is conducted, the mixture is mixed with copric
chloride dihydrate and soaked for a reaction,
starch is added for anaerobic
fermentation, then
aeration is conducted on the mixture,
centrifugation is conducted,
sediment on the lower layer is taken, and the cuprous
oxide is obtained after washing,
drying and
grinding are conducted.The method has the advantages that the preparation steps are simple, purity of an obtained product is 19.2% or above higher than that of other products, and the particle size is small and uniform; particles are not prone to clustering in the formation process, dispersing performance is high, and the yield is raised by 30-40%.