Preparation of Calcium Pyruvate From Egg Shell

The technological processing of calcium Pyruvate form egg shell is studied.The Optimal conditions are shown as follows: the egg shell reduced to ashes at 1000℃ for 2h,then put water(10ml) into ash contents (1g) so as to form linweash,finally,the 7～8 ml 6 mol/L Pyruvatic acid is added into the limewash and kept at 50～60℃,after filtration,the product is dried to yellow powder.The yield is 95%,and the content of Calcium Pyruvate is 87.6%.