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Integrated reaction-separation method and device for preparing mannitol

An integrated reaction, mannitol technology, applied in ion exchange treatment device, ion exchange, ion exchange regeneration and other directions, can solve the problems of heavy pollution, lack of market competitiveness of kelp extraction method, high energy consumption, etc., to achieve simple process, extraction High purity and efficiency, resulting in improved product quality

Active Publication Date: 2013-02-13
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The kelp extraction method is the earliest mannitol production method. Due to the decreasing trend of alginate and mannitol content in kelp in recent years, and the large energy consumption and heavy pollution during the evaporation process, the kelp extraction method is increasingly lacking in market competitiveness.

Method used

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  • Integrated reaction-separation method and device for preparing mannitol
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  • Integrated reaction-separation method and device for preparing mannitol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Turn on the constant current power supply to supply power to the mannitol electrochemical reactor R1 respectively, prepare an anode solution with a sulfuric acid concentration of 1 mol / L; prepare a cathode solution with a sodium sulfate concentration of 0.45 mol / L and a glucose concentration of 0.6 mol / L. Turn on the constant current power supply with a current density of 5A / dm 3 , the temperature is 30-60°C. After 2 hours of electrochemical reaction, a mixed solution of glucose and mannitol was obtained. At this point, it begins to enter the separation cycle process of 8 columns and 4 zones. During the separation process, 8 columns form 4 zones, and each zone is a small simulated moving bed process formed by two chromatographic separation columns connected in series. Separated products are cut out at different stages, such as the automatic control valve connected to the mannitol extraction tank during the extraction stage of mannitol in the separation process, the aut...

Embodiment 2

[0039] Turn on the constant current power supply to supply power to the mannitol electrochemical reactor R1 respectively, prepare an anode solution with a sulfuric acid concentration of 1 mol / L; prepare a cathode solution with a sodium sulfate concentration of 0.45 mol / L and a glucose concentration of 0.6 mol / L. Turn on the constant current power supply with a current density of 5A / dm 3 , the temperature is 30-60°C. After 2 hours of electrochemical reaction, a mixed solution of glucose and mannitol was obtained. At this point, it begins to enter the separation cycle process of 8 columns and 4 zones. During the separation process, 8 columns form 4 zones, and each zone is a small simulated moving bed process formed by two chromatographic separation columns connected in series. Separated products are cut out at different stages, such as the automatic control valve connected to the mannitol extraction tank during the extraction stage of mannitol in the separation process, the aut...

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Abstract

The invention relates to preparation of mannitol, and aims to provide an integrated reaction-separation method and device for preparing mannitol. The method comprises the following steps: carrying out electrochemical reaction on glucose in an electrochemical reactor to generate mannitol, and sending the electrochemical reaction products into a plurality of simulated moving beds capable of implementing series-parallel connection mode switchover control, thereby implementing purification and separation; and respectively sending waste liquor and the mannitol product into a waste liquor recovery groove and a mannitol extraction groove, communicating the unseparated mixture to the next region for further separation, and sending the glucose, which is firstly obtained by separation, into a circulating recovery groove, thereby implementing recycling and reutilization. By degrading the mannitol with an electrochemical method, the invention has the advantage of mild conditions, is easy to control, does not consume oxidant, and can enhance the product quality; the invention also has the advantages of short reaction time, high extraction purity and high efficiency, fully utilizes the raw material, and directly increases the yield; the eluent is pure water, thereby being environment-friendly; and the process is simple and convenient, and can easily implement integration, and the device can implement integrated continuous production.

Description

technical field [0001] The invention relates to the preparation of mannitol, in particular to an integrated reaction separation method and device for the preparation of mannitol, which adopts the coupling method of electrochemical reaction and chromatographic separation to extract mannitol. Background technique [0002] Mannitol is an important fine chemical product widely used in medicine, food, chemical industry and related fields. With the deepening of scientific research, the application field of mannitol is still expanding. Mannitol (D-mannitol or mannite) is scientifically known as hexyl alcohol, also known as D-mannitol, wood honey alcohol, molecular formula C 6 h 14 o 6 , and sorbitol are isomers. Mannitol is a colorless or white acicular or rhombohedral columnar crystal or crystalline powder, with a cool and sweet taste, and the sweetness is about 40%-50% of sucrose. Mannitol widely exists in the leaves, stems, roots, etc. of plants, and is more abundant in edi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/04B01D15/08C25B3/25
Inventor 杨健唐萍徐超郑津洋徐平
Owner ZHEJIANG UNIV
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