Preparation method of high-viscosity instant alginate
A technology of alginate and high viscosity, applied in the field of preparation of high-viscosity instant alginate, can solve problems such as poor instant solubility of alginate, and achieve the effects of instant solubility, improved water-soluble effect and stable viscosity
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[0020] The invention provides a method for preparing high-viscosity instant alginate, the method comprising:
[0021] (1) Soak and wash the brown algae in water, mix and digest them with an alkali agent, dilute with water and carry out high-speed centrifugal sedimentation and floating separation to obtain a clarified glue solution, and then add a filter aid to filter to obtain a brown alginate glue solution; brown algae include kelp, wakame, One or more of Ascophyllum nodosum and macroalgae, the soaking time is 4h-13h, the soaking temperature is 10-25°C, and the water consumption is 2-5 times the quality of the brown algae; the alkali agent is sodium carbonate, alkali The dosage of the agent is 15-35% of the mass of brown algae, the digestion temperature is 40-60°C; the digestion time is 5-6h; the filter aid is one or more of diatomite, activated carbon and acid clay, and the filter aid The dosage is 0.6-2.0% of the quality of brown algae.
[0022] High-efficiency fine filtra...
Embodiment 1
[0030] (1) Soak macroalgae in water at 25°C for 8 hours, the amount of water used is 4 times the weight of dry brown algae; add 30% of the weight of dry brown algae in sodium carbonate and digest at 40°C for 6 hours; add water to dilute and carry out high-speed centrifugation Separated from floating, then add 0.8% diatomaceous earth to filter to obtain alginate liquid;
[0031] (2) Utilize 20% calcium chloride to carry out continuous calcification to the alginate liquid, then add acid to decalcify to obtain alginic acid; the water content of alginic acid is 65%, the dry basis calcium content of alginic acid is 2.3%, and the relative calcium content range Can be controlled within 0.5%;
[0032] (3) Add alginic acid to 12% sodium carbonate for solid-phase neutralization and convert it into alginate, then granulate and dry until the water content of alginate is 10%; then crush and classify by special crushing equipment to obtain the target The number is 60-120 mesh alginate powd...
Embodiment 2
[0035] (1) Soak macroalgae in water at 25°C for 9 hours, the amount of water used is 4 times the weight of dry brown algae; add 30% of the weight of dry brown algae in sodium carbonate and digest at 40°C for 6 hours; add water to dilute and carry out high-speed centrifugation Separated from floating, then add 0.8% diatomaceous earth to filter to obtain alginate liquid;
[0036] (2) Utilize 20% calcium chloride to carry out continuous calcification to the alginate liquid, then add acid to decalcify to obtain alginic acid; the water content of alginic acid is 70%, the dry basis calcium content of alginic acid is 1.6%, and the relative calcium content range Can be controlled within 0.5%;
[0037] (3) Add alginic acid to 12% potassium carbonate for solid-phase neutralization and convert it into alginate, then granulate and dry until the water content of alginate is 8%; then crush and classify by special crushing equipment to obtain the target The number is 60-120 mesh alginate po...
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