Method for extracting pectin from pomegranate rind residues by using electrolytic water

The invention discloses a method for extracting pectin from pomegranate rind residues by using electrolytic water in order to solve the problems of large acid use amount, low extraction rate and low yield of existing extraction of pectin from pomegranate rind residues. The method concretely comprises the following steps: 1, preprocessing a raw material: drying the pomegranate rind residues in the sun, crushing the dried pomegranate rind residues, and drying the crushed residues to obtain a rind residue powder; 2, extracting the pectin by using the electrolytic water: adding weakly-acidic electrolytic water with the pH value of 5.2-5.7 to the pomegranate rind residue powder obtained in step 1 to prepare an acidic mixed solution, carrying out ultrasonic extraction, and collecting the obtained extract liquid; and 3, precipitating and drying the pectin: filtering the extract liquid obtained in step 2 by a gauze, centrifuging the filtered extract liquid, taking and collecting the obtained supernatant, concentratin