Preparation method of water-soluble astaxanthin fucoidin ester
A fucoidan and astaxanthin diester technology is applied in the directions of polysaccharide/gum-containing food ingredients, function of food ingredients, food science, etc., which can solve problems such as poor water solubility of astaxanthin, achieve simple and feasible purification, and reduce production. cost effect
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Embodiment 1
[0032] S 1 56 grams of hexadienoic acid (sorbic acid), 60 grams of free astaxanthin (molar ratio 5:1) and 2.32 grams of molecular sieve HZSM-5 (based on the total mass of the aforementioned raw materials, 2%) were mixed together in about 80 mL of water of 1 volume, Add 8 mL of glass beads (total volume 5%), sand mill for 1 h under cooling, filter the glass beads, and obtain astaxanthin, sorbic acid, molecular sieve catalyst and water to form a uniform reaction slurry;
[0033] S 2 S 1 The prepared reaction slurry was reacted at 50°C for 10 h under the protection of Ar gas, and then 90 mL (1 volume) of 5% NaCl solution was added to break the emulsion, centrifuged, and the oil phase was separated to obtain the intermediate Dihexadienoate astaxanthin diester 49 grams, yield is about 70%;
[0034] S 3 49 grams 2 The prepared intermediate astaxanthin diexadienoate, 105 grams of fucoidan (the degree of polymerization is 300, the ratio of the number of moles of astaxanthin di...
Embodiment 2
[0036] S 1 59 grams of succinic acid, 30 grams of free astaxanthin (molar ratio 10:1) and 3.6 grams of molecular sieve ZSM-5 (based on the total mass of the aforementioned raw materials, 4%) were mixed together in 150 mL (3 times the volume) of water, and 20 mL of (total volume 10%) glass beads, sanding for 3 hours under cooling, filtering the glass beads to obtain astaxanthin, succinic acid, molecular sieve catalyst and water to form a uniform reaction slurry;
[0037] S 2 S 1 The prepared reaction slurry was reacted at 70°C for 6 hours. Ar gas protection was required during the reaction process. After completion, 300mL (1.5 times the volume) of 5% NaCl solution was added to break the emulsion, centrifuged, and the glass beads were filtered out. In the oil phase, 21 grams of the intermediate astaxanthin disuccinate was obtained, and the yield was about 60%;
[0038] S 3 21 grams 2 Prepared intermediate astaxanthin disuccinate, 90 grams of fucoidan (degree of polymeriz...
Embodiment 3
[0040] S 1 54 grams of oxalic acid, 24 grams of free astaxanthin (molar ratio 15:1), and 6.3 grams of molecular sieve HZSM-5 (based on the total mass of the aforementioned raw materials, 6%) were mixed together in 200 mL (5 times the volume) of water, and 40 mL ( 20% of the total volume) of glass beads, cooled and sanded for 5 hours, filtered off the glass beads to obtain astaxanthin, oxalic acid, molecular sieve catalyst and water to form a uniform reaction slurry;
[0041] S 2 S 1 The prepared reaction slurry was reacted at 80° C. for 3 hours. Ar gas protection was required during the reaction process. After completion, 500 mL (2 times the volume) of 5% NaCl solution was added to break the emulsion, centrifuged, and the oil phase was separated to obtain Intermediate astaxanthin oxalate diester 21.5 grams, the yield is about 80%
[0042] S 3 21.5 g S 2 Prepared intermediate diastaxanthin oxalate, 144 grams of fucoidan (polymerization degree 100, ratio of diastaxanthin...
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