Preparation method of resin for high-selectivity adsorption of gardenia yellow

Abstract

The invention discloses a preparation method of resin for high-selectivity adsorption of gardenia yellow. The preparation method comprises the following steps: (1) adding a skeleton raw material, a cross-linking agent and an additive to de-ionized water for conducting a polymerization reaction namely, warming up mixed liquor to 60-80 DEG C within 35-55min and preserving heat for 0.5-2.5h; then warming up the mixed liquor to 60-80 DEG C within 15-20min and preserving heat for 3-5h; and then warming up the mixed liquor to 70-90 DEG C within 20-25min and preserving heat for 3-5h; finally, warming up the mixed liquor to 90-95 DEG C within 20-25min and preserving heat for 3-5h, and conducting solid-liquid separation; (2) cleaning solid phase with water for 2-3 times to obtain milk white spherical particles; and (3) cleaning the milk white spherical particles with vapor to obtain the resin. The prepared resin is high in stability, large in specific surface area, large in adsorption capacity, good in selectivity, rapid in adsorption speed and is capable of efficiently adsorbing gardenia yellow, and the obtained gardenia yellow is high in color value and purity; and in addition, the resin is capable of conveniently conducting regeneration treatment, long in service life and low in production cost.

Description

technical field [0001] The invention provides a preparation method of a resin capable of highly selectively adsorbing gardenia yellow, belonging to the technical field of polymer chemistry. Background technique [0002] Gardenia yellow pigment is a yellow pigment extracted from gardenia fruit. It is a rare water-soluble carotenoid pigment in nature. It is a natural pigment. It can be used alone or together with gardenia blue pigment and gardenia red Pigments can be compounded to obtain a series of pigments of different hues, which are bright in color, non-toxic, good in stability and strong in dyeing ability, and are widely used in the fields of food, medicine and cosmetics. In recent years, due to the emergence of food safety problems of synthetic pigments, the market of natural pigments such as gardenia pigments has expanded rapidly. The extraction method of gardenia yellow pigment mainly contains: macroporous adsorption resin method, ultrafiltration, reverse membrane osm...

AI Technical Summary

Problems solved by technology

The Chinese patent with the patent number CN102911513 disclosed a method for extracting gardenia yellow pigment on March 12, 2014. In this method, a macroporous resin adsorption method is used, but the adsorption effect is not ideal, and the fruit needs to be peeled. In order to achieve a certain adsorption effect, the operation is cumbersome, the process is long, and the loss of active ingredients is relatively increased, which increases the difficulty of the process and increases the extraction cost.