Low-odor water-soluble copper chlorophyllin and preparation method and use thereof

A method for preparing a low-odor water-soluble copper chlorophyllin, comprising:

• (1) deodorization:
• washing a copper chlorophyllin paste with an alcohol solution containing a phosphate or disodium ethylenediaminetetraacetate while stirring, conducting a solid-liquid separation to obtain an alcohol solution and a precipitate;
• (2) concentration:
• removing residual alcohols in the precipitate prepared in the step (1) by evaporation under vacuum to obtain a low-odor refined copper chlorophyllin ointment;
• (3) dilution:
• diluting the low-odor refined copper chlorophyllin ointment prepared in the step (2) with vegetable oil to obtain a low-odor copper chlorophyllin raw material with good fluidity;
• (4) emulsification and homogenization:
• mixing the low-odor copper chlorophyllin raw material prepared in the step (3) as a core material with a solution of a colloidal wall material, followed by vacuum high-speed emulsification and ultra-high-pressure homogenization to obtain a low-odor water-soluble copper chlorophyllin emulsion;
• and
• (5) secondary microencapsulation:
• carrying out spray granulation of the low-odor water-soluble copper chlorophyll emulsion prepared in the step (4), and simultaneously spraying a coating material for secondary encapsulation in the spray granulation process;
• and finally drying to obtain the low-odor water-soluble copper chlorophyllin,
• wherein the colloidal material in the step (4) is at least one selected from the group consisting of sodium octenylsuccinate starch, hydroxypropyl starch, acetate starch, carboxymethyl starch, phosphate starch, resistant dextrin, microporous starch, acacia gum, ghatti gum, xanthan gum, pullulan, fucoidan, trehalose, and lactose.