Red pigment extraction method

Abstract

The invention belongs to the technical field of natural product extraction and relates to a shrimp shell or crab shell red pigment extraction method which can be applicable to industrialized production. The extraction method comprises the following steps: cleaning shrimp shells or crab shells, removing oil on the surfaces of the shrimp shells or crab shells, then putting into water, boiling out for 14-20 minutes, then drying, and smashing into shrimp shell or crab shell powder particles of 50-70 meshes; adding an organic solvent into the shrimp shell or crab shell powder particles, controlling the temperature to be 50-60 DEG C, condensing and refluxing for 3-5 hours, filtering to obtain a dark red filtrate and shrimp shell or crab shell solids, adding a sodium hydroxide aqueous solution into the dried shrimp shells or crab shells, carrying out boiling water bath, then filtering, adding an organic solvent into a filtrate, condensing and refluxing under control of temperature, then carrying out liquid separation, mixing dark red filtrates at organic solvent layers, then concentrating, so that red oily matter is obtained, carrying out vacuum drying for 2-4 hours while temperature is controlled to be 0-10 DEG C, so that the shrimp shell or crab shell red pigment finished product is obtained. The red pigment extraction method provided by the invention has the advantages that a process route is simple, product quality is good, yield is high, industrial production and environmental friendliness can be realized, and energy conservation is strong.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of natural product extraction, and relates to a process for processing and utilizing raw materials of shrimp shells or crab shells, in particular to an industrially produced method for extracting red pigment from shrimp shells or crab shells. [0003] Background technique: [0004] At present, both at home and abroad are paying great attention to and admiring natural pigments, especially in the fields of food, health products and cosmetics, vigorously promoting the use of natural edible pigments. Most of the natural pigments widely used in recent years are available pigments extracted from plants: Chinese patent 201210179475.2 discloses a safflower yellow pigment extraction process, including medicinal material extraction, macroporous adsorption resin column adsorption, first elution, polymerization Amide column adsorption, second elution, concentration and spray drying, although this method can achie...

AI Technical Summary

Problems solved by technology

Most of the natural pigments widely used in recent years are available pigments extracted from plants: Chinese patent 201210179475.2 discloses a safflower yellow pigment extraction process, including medicinal material extraction, macroporous adsorption resin column adsorption, first elution, polymerization Amide column adsorption, second elution, concentration and spray drying, although this method can achieve pigment extraction, it is difficult to achieve high extraction rate; Chinese patent 201310670696.4 discloses a purple corn pigment extraction process, including solvent extraction, Enzyme treatment, filtratio...