Process for extracting mannitol from kelp

A technology of mannitol and kelp, which is applied in the field of extracting mannitol, can solve the problems of low extraction yield, lower production cost, and high extraction yield of mannitol, and achieve the effect of increasing extraction yield and reducing production cost

Inactive Publication Date: 2006-10-04
XUSN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art that it takes a long time and a large amount of fresh water to obtain the kelp water soaking solution containing mannitol, the labor cost required for sun-dried kelp is high, and the loss of mannitol duri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The fresh kelp harvested at sea is selected as the raw material, and after weighing 100 kg, it undergoes the following treatment process:

[0015] (A), soaking: freshly harvested 100 kilograms of fresh kelp are chopped, pumped to the soaking pool and soaked in 200 kilograms of water for 30 minutes; the soaking method adopts the double soaking method, and uses the second soaking water for the second time Carry out soaking for the first time, improve the iodine, mannitol content of soaking water;

[0016] (B), purification: put the above-mentioned kelp soaking liquid in the floating pool, add liquid caustic soda to adjust the pH value of the soaking water at 12, so that organic colloidal impurities such as sugar and gum are condensed; simultaneously, pump air into it with a circulation pump to carry out aeration After 20 minutes, rest and float for 2 hours, the clear liquid can be released from the lower part;

[0017] (C), acidification and oxidation: add industrial hyd...

Embodiment 2

[0022] The fresh kelp harvested at sea is selected as the raw material, and after weighing 500 kg, it undergoes the following treatment process:

[0023] (A), soaking: 500 kilograms of fresh kelp newly harvested are chopped, pumped to the soaking pool and soaked in 1000 kilograms of water for 50 minutes; the soaking method adopts the double soaking method, and the second soaking water is used for the second time Carry out soaking for the first time, improve the iodine, mannitol content of soaking water;

[0024] (B), purification: put the above-mentioned kelp soaking liquid in the floating pool, add liquid caustic soda to adjust the pH value of the soaking water at 12, so that organic colloidal impurities such as sugar and gum are condensed; simultaneously, pump air into it with a circulation pump to carry out aeration After 30 minutes, stand still and float for 3 hours, then the clear liquid can be released from the lower part;

[0025] (C), acidification and oxidation: add ...

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PUM

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Abstract

The disclosed method to extract mannitol from kelp comprises: with fresh kelp as material, cutting up, adding 200wt% water to dip for 30-50min; adjusting pH value with alkali, filtering to obtain the clear liquid with I2 and mannitol; acidifying and oxidizing to obtain dissociative I2, adsorbing and extracting I2 by exchange resin; adding alkali to regulate pH value for residual liquid, evaporating and concentrating to separate deposition; then evaporating the liquid, cooling to crystallize, centrifuging and cleaning to obtain the semi finished product; heating and dissolving, discoloring with active carbon, filtering the carbon; diluting the filtered liquid, desalting, vacuum concentrating, crystallizing, separating, and drying to obtain the final product. This invention reduces cost, and improves yield.

Description

technical field [0001] The invention relates to seaweed chemical technology, in particular to a method for extracting mannitol from seaweed. Background technique [0002] Mannitol can be used as injections and oral medicines for the treatment of eye, brain, diabetes, hypertension and other diseases, and its derivatives can be used as emulsifiers and used in the manufacture of foam plastics and explosives. In the traditional method of extracting mannitol from kelp, the raw material of kelp used is dried kelp that has been sun-dried, and the following process: add 4-16 times of tap water to the dried kelp, soak for 1-2 hours, and obtain iodine-containing , mannitol kelp water soaking solution, add caustic soda to the kelp water soaking solution to adjust the pH value to about 12, settling for 8 hours, get purified water and then add hydrochloric acid to adjust the pH value to 2, then add sodium hypochlorite and stir evenly to make it brown Red, when it is close to oxidation, ...

Claims

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Application Information

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IPC IPC(8): C07C31/26C07C29/76
Inventor 王清印李长清冷凯良卞永平
Owner XUSN GROUP
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