Method for extracting iodine-containing amino acid from fresh kelp

An amino acid and kelp technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as few studies, and achieve the effect of simple extraction methods

Inactive Publication Date: 2010-06-23
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the international research on iodine in seaweed mainly focuses on theoretical analysis and research, such as using neutron method or polarography to analyze the organic or inorganic form of seaweed iodine, the ratio of organic state and inorganic state and the content of organic iodine. The chemical organization, especially of iodine-containing amino acids, has been poorly studied

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  • Method for extracting iodine-containing amino acid from fresh kelp
  • Method for extracting iodine-containing amino acid from fresh kelp

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Take 100 kg of artificially cultured kelp, wash it with water to remove impurities and foreign matter. Use a shredder to cut the dry kelp that does not contain moisture on the surface into 1-2cm fritters, transfer it to 1000 kilograms of interlayer conical reactors, add mass concentration 15% formic acid (HCOOH, adopt mass concentration 85% formic acid stock solution Allotment) 300 kilograms, and the reactor automatically stirred and extracted for 16 hours. The filtrate is filtered with a plate filter, and the collected filtrate is concentrated to 20 kg with a steam three-effect concentration tank. Adjust the pH to 2.0, and concentrate on a 732 cation exchange resin column (30×150cm), and use 20 kilograms of 1mol / L NH 4 OH was eluted, and continued to concentrate to dryness with a steam three-effect concentration tank, and the obtained product contained 340 grams of iodine-containing amino acid crude product.

[0027] The chemical structure of iodine-containing amino ...

Embodiment 2

[0030] Take 100 kg of artificially cultured kelp, wash it with water to remove impurities and foreign matter. Use a shredder to cut the dry sea-tangle that does not contain moisture on the surface into 1-2cm fritters, transfer it to 1000 kilograms of interlayer conical reactors, add mass concentration 18% formic acid (HCOOH, adopt mass concentration 85% formic acid stock solution Allotment) 400 kilograms, and the reactor automatically stirred and extracted for 20 hours. The filtrate is filtered with a plate filter, and the collected filtrate is concentrated to 30 kg with a steam three-effect concentration tank. Adjust the pH to 3.0, and concentrate on a 732 cation exchange resin column (30×150cm), and use 30 kilograms of 1.5mol / L NH 4 OH was eluted, and continued to concentrate to dryness with a steam three-effect concentration tank, and the obtained product contained 370 grams of iodine-containing amino acid crude product.

Embodiment 3

[0032] Take 100 kg of artificially cultured kelp, wash it with water to remove impurities and foreign matter. Put the clean kelp in a hanging cage of 1m in length x width x height to control the water for 1 hour, cut the water-controlled kelp into small pieces of 3-5cm with a shredder, put it into a tissue grinder and homogenize it for 2 minutes. Collect the kelp homogeneous solution, add 350 kg of 6mol / L HCl solution in a stainless steel stirring pot, stir and extract continuously at room temperature for 20 hours, filter on a plate, and concentrate the filtrate to 17 kg with a three-effect concentration evaporator, and adjust the pH to 2.5; 732 cation exchange resin column (30×150cm) was concentrated, eluted with 17 kg of 0.05mol / L NaOH, and concentrated to dryness with a concentration evaporator to obtain 600 grams of iodine-containing amino acid crude product.

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Abstract

The invention provides a method for extracting iodine-containing amino acid from fresh kelp. The method comprises: 1) removing impurities and foreign objects from fresh kelp and drying water on the surface of the kelp; 2) adding the kelp to extract solution which is formic acid solution 3 to 4 times the weight of the kelp and is in a mass concentration of 13 to 18 percent or 5 to 6 mol/L of HCl solution, stirring and extracting for 16 to 20 hours, filtering the obtained product and obtaining extract liquid; 3) using a steam three-effect concentration tank to concentrate the extract liquid to be 4 to 10 percent of the total weight of the original extract liquid, obtaining concentrated solution and regulating pH between 2 and 3; 4) passing the obtained product through a large-scale 732 cation exchange resin column under the condition of pH between 2 and 3, using 1 to 1.5 mol/L of NH4OH which is 0.5 to 2 the volume of the concentrated solution or 0.05 to 0.1 mol/L of NaOH for elution; and 5) using the three-effect concentration tank again to concentrate the obtained product to be dry and obtaining a crude product of iodine-containing amino acid. The method has the advantages of abundant raw materials, relative simplicity, easy implementation and suitability for enterprise production.

Description

technical field [0001] The invention relates to the extraction of iodine in seaweed, in particular to an industrial extraction technology of iodine-containing amino acid in fresh seaweed. Background technique [0002] my country's production of seaweed resources ranks first in the world. According to the statistics of the International Food and Agriculture Organization in 1999, the world's seaweed production is about 8 million tons, and my country accounts for 61% of about 4.8 million tons, most of which are artificially cultivated kelp. [0003] Iodine is a rare element in nature and the most basic element that constitutes plants. The study of iodine began in 1811. Frenchman Bernard Coutois discovered a black powder in seaweed ash, which was identified as a new element after research by scientist Gay-Lussac and named iodine. Later, it was found that iodine exists in all marine and terrestrial organisms, and plays a very important role in the metabolic activities of organis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C227/40C07C229/36
Inventor 韩丽君李敬袁毅史大永
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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