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A kind of extraction method of alginate and waste calcium water reuse method

A technology of alginate and extraction method, which is applied in the fields of chemical instruments and methods, natural water treatment, water/sewage multi-stage treatment, etc., and can solve the problems of complex recovery and utilization of waste calcium water, high unit consumption of diluting water, and glue Incomplete purification and other problems, to achieve the effect of improving comprehensive utilization efficiency, reducing water consumption, improving recycling and economic benefits

Active Publication Date: 2019-09-13
QINGDAO BRIGHT MOON SEAWEED GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high unit consumption of diluting water in the existing alginate extraction process, incomplete purification of glue solution after diluting, complex recovery and utilization technology of waste calcium water, environmental pollution and high reuse cost, the invention provides a seaweed The extraction method of acid salt and the reuse method of waste calcium water can effectively improve the purity of sodium alginate, and at the same time greatly reduce the unit consumption of alginate process water and recycle the method of waste calcium water, which improves the comprehensive utilization efficiency of resources and reduces the environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Immersion: Accurately weigh 100kg of dried kelp, add 800kg of water to soak for 2 hours, and clean and remove surface impurities;

[0037] (2) Crushing: the soaked kelp is chopped into 1×1cm pieces;

[0038] (3) Transformation: add 500kg of water and 15kg of sodium carbonate to the chopped kelp to adjust the water temperature to 40-55°C, and react for 1-1.5h;

[0039] (4) Dilution: After conversion, the material is diluted with water to the En's viscosity of 250s;

[0040] (5) Centrifugation and floating: After dilution, the glue solution is centrifuged with a decanter to remove water-insoluble impurities, and then left to float for 2.5 hours;

[0041] (6) Oxidation: After standing, release the supernatant liquid, add chlorine gas to the clear liquid, make the effective chlorine content in the glue liquid 30ppm, and let it stand for 30min.

[0042] (7) Separation: After standing and reacting, the glue solution is filtered with a 200-mesh fine mesh to remove impuri...

Embodiment 2

[0051] (1) Immersion: Accurately weigh 200kg of dried macroalgae, add 1800kg of clean water to soak for 24h, and clean and remove surface impurities;

[0052] (2) Crushing: The soaked macroalgae are chopped into blocks with a diameter of 2 mm;

[0053] (3) Transformation: add 1000kg of water and 48kg of sodium carbonate to the chopped macroalgae to adjust the water temperature to 50-55°C, and react for 8-10h;

[0054] (4) Dilution: After conversion, the material is diluted with water to an Enz viscosity of 300s;

[0055] (5) Centrifugation and floating: After dilution, the glue solution is centrifuged with a decanter to remove water-insoluble impurities, and then left to float for 2 hours;

[0056] (6) Oxidation: After standing, the supernatant is released, and the chlorine dioxide aqueous solution is evenly added to the clear liquid to make the effective chlorine content in the glue solution 40ppm, and the reaction is allowed to stand for 30min.

[0057] (7) Separation: add...

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PUM

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Abstract

The invention discloses an alginate extraction method and a waste calcium water reuse method. The steps are: 1) brown algae are broken after leaching, and sodium carbonate is added to react with water to obtain sodium alginate paste material; The paste material is diluted with water to obtain glue A; 2) After dilution, glue A is centrifuged to remove the water-insoluble residue, then left to float, and the upper layer of scum is removed to obtain clear liquid B; 3) Add oxidant to clear liquid B, stir evenly and let stand Set up the reaction; then filter to obtain purified gel liquid C; 4) Add calcium chloride aqueous solution to the purified gel liquid C and react to obtain calcium alginate, which can be used to extract alginate; and waste calcium water is generated at the same time. The invention can effectively improve the purity of sodium alginate, while significantly reducing the unit consumption of alginate process water and recycling waste calcium water, improving the comprehensive utilization efficiency of resources and reducing environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of alginate preparation, and in particular relates to a method for extracting alginate from brown algae, and a method for recycling the remaining waste calcium water after extracting the alginate. Background technique [0002] The cell wall of brown algae cells is mainly composed of alginate (mainly calcium alginate), fiber, pectin and protein. In the current production of alginate, the brown algae is soaked and then converted with sodium carbonate. The defect is: under high temperature and alkaline conditions, the cellulose and protein in the brown algae are also easily hydrolyzed. It is not easy to remove, and will eventually react with calcium chloride to precipitate and enter into calcium alginate, affecting the quality of alginate. For example, in the invention patent CN102060938B "A method for comprehensively extracting alginate from brown algae" filed on December 24, 2012, the diluting digestive glue...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/04C02F9/04C02F103/38
Inventor 徐泽斌窦有涛王超黑雅各
Owner QINGDAO BRIGHT MOON SEAWEED GROUP