Preparation and Influencing Factors Study of Copper Methionine
Copper methionine,as a new type of high-efficiency feed additive,can provide copper and balanced amino acids to animals at the same time.In this paper,Copper methionine(Cu(Met)2)was optimized and synthesized by aqueous synthesis method with DL-methionine and industrial grade copper sulfate as raw materials.The effects of pH,temperature and time on the preparation of copper methionine were investigated,and the products were characterized by XRD and FTIR.The results showed that the optimum synthesis process of copper methionine was as follows:n(methionine)∶n(Cu2+)=2∶1,adding 10 times of water with methionine dosage,adjusting pH to 5,reacting at 90℃for 2 h,and Subsequently,perform hot filtration,washing,and drying.The synthesized product was determined to be copper methionine by XRD and FTIR characterization methods.Through the mother liquor reuse test,the optimal number of cycles of the mother liquor was determined to be 2 times,which reduced the disposal cost of tail wastewater in industrial production and was conducive to industrialization.
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