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.