Method for extracting algae iodine by using aluminum ion secondary sedimentation and produced algae iodine salt using same

Abstract

The invention relates to a method for extracting algae iodine by using aluminum ion secondary sedimentation and produced algae iodine salt using same, which comprises the following steps: 1) taking a raw material and directly crushing, adding water of which the weight is equivalent to 10 times of that of the raw material, adding sodium carbonate of which the weight is equivalent to 1%-5% of weight of the raw material in a mixture, mixing and extracting for 6-18 hours under the temperature of 45-55 DEG C, and filtering to obtain a filtrate; 2) adding an aluminum compound aqueous solution in the filtrate drop by drop until mass precipitates are generated, filtering and centrifuging to obtain a supernatant; 3) adding a sodium carbonate aqueous solution in the supernatant, generating flocculent precipitates on the supernatant, and centrifuging and removing the precipitates; and 4) concentrating the extracted supernatant without generation of flocculent precipitates, and preparing to obtain the algae iodine concentrate. According to the invention, the heavy metals and most alga polysaccharides in the algae iodine products can be effectively removed by the method, the purity and the recovery rate can be substantially increased, the technology is simple, the cost is low, the standard algae iodine can be produced with large scale, and the prepared algae iodine concentrate can be used for preparing algae iodine crystal and algae iodine salt.

Description

technical field [0001] The invention belongs to the field of food processing, in particular to a method for extracting iodine-containing products and preparing seaweed iodized salt. Background technique [0002] Iodine is an essential trace element for the body. It is an indispensable component for the synthesis of thyroid hormones. Insufficient iodine in food can reduce thyroid secretion and reduce body metabolism, leading to goiter, endemic goiter and endemic cretinism. It can also cause growth retardation, mental retardation or dementia in children. All the effects on human development due to iodine deficiency are called "iodine deficiency diseases". Pregnant women, lactating mothers, and children are especially indispensable for iodine deficiency. [0003] Iodine is usually in a state of dynamic balance in the human body, and excess iodine will be excreted with urine. At present, the main way of supplementing iodine is potassium iodate, which is a kind of chemically sy...

AI Technical Summary

Problems solved by technology

The alcohol precipitation method is to hydrolyze the iodine-containing seaweed with water and alkali, settle with ethanol, and then evaporate the supernatant ethanol to concentrate and extract, but the alcohol precipitation method obtains a mixture of iodine-containing polysaccharides containing various seaweed components, and the extraction process flow Complicated, the loss of organic iodine is large, and the yield is low. The extracted seaweed iodine contains a large amount of seaweed polysaccharides soluble in water and ethanol, and the heavy metals in seaweed are not easy to remove in the seaweed iodine extract, and the residual amount is large.

Although the calcium ion precipitation method has basically solved the problem of heavy metal residues, glycerol is used as a protective agent and one-time sedimentation, and the content of glycerol and other seaweed components in the obtained seaweed iodine is relatively high, and the purity of seaweed iodine remains to be determined. improve

Images