Method for synthesis of calcium alginic acid monosaccharide from shells and alginic acid

A technology for the synthesis of alginic acid monosaccharides, which is applied in chemical instruments and methods, sugar compounds with non-glycosyl groups, sugar derivatives, etc., can solve problems such as little research, and achieve easy absorption and utilization and high product safety , the effect of a wide range of sources

Inactive Publication Date: 2013-11-27
QINGDAO UNIV
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Problems solved by technology

[0003] The complete degradation products of alginic acid are D-mannuronic acid and L-guluronic acid, both of which have unique physiological activities: D-mannuronic acid has the functions of anticoagulation, reducing blood visco

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: Soak 130 grams of clam shells in 0.05M hydrochloric acid solution for 1 hour, then scrub to remove the silt and other adsorbents on the surface of the shells, dry them at 80°C, crush them through a 60-mesh sieve, and then process them with tap water and dry them. Dry to obtain 110 grams of calcium source shell powder for synthesizing alginate monosaccharide calcium. Dissolve 150g of alginic acid in 12L of hydrogen peroxide solution with a concentration of 3% by mass, and adopt a staged programmed heating degradation method combining water bath heating and microwave heating, that is, 80°C water bath oscillation for 1h-microwave for 1.5h-80°C water bath oscillation 1h-microwave 1h, centrifuge the degradation product (8000rpm) to take the supernatant, add 4 times the volume of 95% ethanol: acetone (v:v=1:1) mixed solvent, stir for 10 minutes, filter to remove the precipitate, and remove the supernatant First recover the solvent by rotary evaporation, then concen...

example 2

[0018] Example 2: The steps and method are the same as in Example 1. The raw materials are oyster shells or scallop shells, and the quality of the product prepared with monosaccharide calcium alginate is the same as that of clam shells.

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Abstract

The invention relates to a method for synthesis of calcium alginic acid monosaccharide from shells and alginic acid. The method comprises shell pre-treatment, alginic acid degradation, synthesis, crystallization, and drying. The method comprises the following steps of 1, immersing shells in hydrochloric acid having the content of 0.05M, carrying out drying, carrying out crushing, carrying out treatment by an elutriation method to obtain calcium-source shell powder, adding alginic acid into an appropriate amount of a H2O2 solution having the content of 3%, carrying out heating degradation by a water-bath heating and microwave heating combined method, wherein in the heating degradation, a water-bath heating process is carried out at a temperature of 80 DEG C for 1h, then a microwave heating process is carried out for 1.5h, then a water-bath heating process is carried out at a temperature of 80 DEG C for 1h and then a microwave heating process is carried out for 1h, and carrying out centrifugation, purification, concentration and drying of the degradation products to obtain white alginic acid monosaccharide, and 2, dissolving the white alginic acid monosaccharide in an appropriate amount of distilled water, adding the calcium-source shell powder into the alginic acid monosaccharide solution according to a mole ratio of the alginic acid monosaccharide to the shell powder of 2: 1.0-1.2, wherein the calcium carbonate content is 95%, carrying out a reaction in a water bath at a temperature of 30 DEG C for 0.75h, carrying out suction filtration, and carrying out reduced pressure concentration, alcohol precipitation crystallization and drying of the supernatant. The method has simple processes. The calcium alginic acid monosaccharide can be used as a novel calcium supplement agent. The method realizes high-value utilization of alginic acid and a plurality of shells.

Description

technical field [0001] The invention relates to a method for synthesizing alginic acid monosaccharide calcium by using shellfish processing waste and alginic acid as raw materials through high-value and clean process steps to realize high-efficiency utilization of shellfish processing waste and alginic acid. Background technique [0002] Calcium is one of the indispensable nutrients for the human body. It plays an important role in bone formation, muscle contraction, heart beating and brain thinking activities, eliminating fatigue, strengthening the brain and delaying aging. At present, most calcium supplements that have been widely used are calcium carbonate, calcium gluconate, calcium lactate, etc. my country is rich in aquatic product resources, but a large amount of waste (oyster shells, scallop shells and clam shells, etc.) produced by shellfish processing has yet to be developed and applied. [0003] The complete degradation products of alginic acid are D-mannuronic a...

Claims

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Application Information

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IPC IPC(8): C07H7/033C07H1/00
Inventor 魏玉西崔育倩丛爽李冉张菲张翼飞赵婕
Owner QINGDAO UNIV
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