Method of producing eggshell powder

摘要

The invention relates to producing dried eggshell powder in conditions of high temperatures, preferably in first, second and third heating stages to isolate specific components of the eggshell. These components have nutritional and anti-microbial activity.

主权项

1. A method of producing a zinc oxide antibacterial agent from eggshells comprising the steps of
reducing the size of raw eggshells to a particle size sufficient for the intended use of the eggshell; removing any excessive liquid from the sized eggshell particles; heating the sized eggshell particles in a heating zone at a calcining temperature of about 350° C. to about 400° C. for an effective amount of time to produce zinc oxide and removing the calcined eggshells containing zinc oxide from the heat; cooling the heated eggshell particles; drying the eggshell particles; and reducing the size of the heated, dried eggshell particles a second time to produce a calcined eggshell powder with antibacterial properties containing zinc oxide.