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Method of producing sorbic alcohol and mannitol by utilizing cellulose

A cellulose and sorbitol technology, applied in organic chemistry, hydrolysis preparation and other directions, can solve the problems of inevitable equipment corrosion, increased equipment investment cost, low reaction efficiency, etc., and achieves a small investment, low equipment requirements, and simple reaction system. Effect

Active Publication Date: 2007-10-24
PEKING UNIV
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AI Technical Summary

Problems solved by technology

The problems with this approach are: (1) H 3 PO 4 Adding is not a green process, there is waste acid discharge, causing environmental pollution; (2)H 3 PO 4 The addition of 160°C-200°C reaction temperature puts forward strict requirements on the equipment, and at the same time inevitably causes corrosion of the equipment and increases the investment cost of the equipment
The problem of this method is: the reaction time is too long, and the reaction efficiency is very low

Method used

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  • Method of producing sorbic alcohol and mannitol by utilizing cellulose
  • Method of producing sorbic alcohol and mannitol by utilizing cellulose
  • Method of producing sorbic alcohol and mannitol by utilizing cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, hydrolyzing cellulose to produce sorbitol and mannitol

[0016] 1g of microcrystalline cellulose (microcrystalline cellulose, available from Alfa Aesar) was placed in a 150ml reactor filled with sufficient water (50ml), 0.4g of Pd / C catalyst was added, and filled with H 2 , the pressure in the reactor was 60atm, heated to 290°C, and reacted for 1 hour.

[0017] According to the following method, the conversion rate of cellulose and the productive rate of sorbitol and mannitol are detected:

[0018] Reaction product is carried out mass spectrometry, and the result shows, mass spectrometry gives the molecular ion peak that mass-to-charge ratio is 183, provides the molecular ion peak of mass-to-charge ratio 183 molecular weight on mass spectrum with the standard sample of sorbitol and mannitol coincides; The reaction product is carried out High-performance liquid phase analysis and quantification, (Agilent 1100Series HPLC, purchased by Beijing Agilent Co., L...

Embodiment 2

[0026] Embodiment 2, hydrolyzing cellulose to produce sorbitol and mannitol

[0027] 1g of natural cellulose (purchased from Beijing Reagent Company) was placed in a 150ml reaction kettle filled with sufficient water (50ml), added 0.1g of Pt / C catalyst, charged with H 2 , the pressure in the reactor was 60atm, heated to 220°C, and reacted for 2 hours.

[0028] According to the following method, the conversion rate of cellulose and the productive rate of sorbitol and mannitol are detected:

[0029] Reaction product is carried out mass spectrometry, and the result shows, mass spectrometry gives the molecular ion peak that mass-to-charge ratio is 183, provides the molecular ion peak of mass-to-charge ratio 183 molecular weight on mass spectrum with the standard sample of sorbitol and mannitol coincides; The reaction product is carried out High-performance liquid phase analysis and quantification, (Agilent 1100Series HPLC, purchased by Beijing Agilent Co., Ltd., separation column...

Embodiment 3

[0031] Embodiment 3, hydrolyzing cellulose to produce sorbitol and mannitol

[0032] 1g of microcrystalline cellulose (microcrystalline, available from Alfa Aesar) was placed in a 150ml reactor filled with sufficient water (50ml), 0.2g of Ru / C catalyst was added, and filled with H 2 , the pressure in the reactor was 20atm, heated to 240°C, and reacted for 1.5 hours.

[0033] According to the following method, the conversion rate of cellulose and the productive rate of sorbitol and mannitol are detected:

[0034] Reaction product is carried out mass spectrometry, and the result shows, mass spectrometry gives the molecular ion peak that mass-to-charge ratio is 183, provides the molecular ion peak of mass-to-charge ratio 183 molecular weight on mass spectrum with the standard sample of sorbitol and mannitol coincides; The reaction product is carried out High-performance liquid phase analysis and quantification, (Agilent 1100Series HPLC, purchased by Beijing Agilent Co., Ltd., se...

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Abstract

The invention discloses a manufacturing method of sorbitol and mannitol through cellulose, which is characterized by the following: placing cellulose in the water; adding catalyst to react to produce sorbitol and mannitol under 190-350 deg. c; coupling the hydrolyzed intermediate to hydrogenate; obtaining the product without adding inorganic acid; reducing investment; lengthening the lifetime of catalyst.

Description

technical field [0001] The invention relates to a method for producing sorbitol and mannitol from cellulose. Background technique [0002] Definition of biomass: Under the conditions of photosynthesis, green plants use solar energy to convert CO 2 , H 2 O is transformed into plants; forests, forest industrial waste, agricultural waste, aquatic plants, oil plants, urban and industrial organic waste, etc., all belong to biomass. Therefore, biomass is a renewable resource and comes from a wide variety of sources. Current energy is based on coal, oil, and natural gas, and these fossil resources will eventually be exhausted. Based on the definition and origin of biomass, it would be an ideal substitute for fossil resources. 60% to 80% of the composition of biomass is cellulose. Therefore, the effective conversion of cellulose is a key step for biomass to replace fossil energy. Cellulose is a macromolecule polymerized by glucose units through β-1,4-glucosidic bonds. The intr...

Claims

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Application Information

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IPC IPC(8): C07C31/26C07C29/09
Inventor 刘海超罗琛
Owner PEKING UNIV
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