Energy-saving environment-friendly chitin deacetylation processing method

The invention discloses an energy-saving environment-friendly chitin deacetylation processing method. The method comprises the steps of directly adding mitten crab carapace solid which is subjected toan acetic acid complex phosphoesterases acidolysis reaction and 6%-8% hydrochloric acid solution into an acidolysis tank to conduct secondary decalcification, detecting residual calcium of the mittencrab carapace after 4-6 hours, and stopping the reaction and moving the hydrochloric acid solution out of the acidolysis tank when no residue is left. According to the energy-saving environment-friendly chitin deacetylation processing method, acid liquid is fully used to make the acid liquid be saturated, and the purpose of achieving 'four desorption' is thoroughly achieved. The original waste acid is discharged after being basically consumed. Then new excessive hydrochloric acid is utilized to conduct secondary desorption, the left acid in the desorbed waste liquid is high and is used for conducting primary desalinat