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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 requireme

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

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Example Embodiment

[0015] Example 1. Production of sorbitol and mannitol by hydrolyzing cellulose

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

[0017] The conversion rate of cellulose and the yield of sorbitol and mannitol were tested according to the following method:

[0018] The reaction product was analyzed by mass spectrometry, and the result showed that the mass-to-charge ratio of 183 molecular ion peak by mass spectrometry was consistent with the molecular ion peak of sorbitol and mannitol that gave a mass-to-charge ratio of 183 molecular weight on the mass spectrum; HPLC analysis and quantification, (Agilent 1100Series HPLC, purchased by Beijing Agilent Co., Ltd., separation column: HAMILTON HC-75 Calcium Form Cation Eechange, analysis conditions: 30℃, 0.6ml / min, ultrapure water a...

Example Embodiment

[0026] Example 2: Production of sorbitol and mannitol by hydrolyzing cellulose

[0027] Put 1g of natural cellulose (purchased from Beijing Reagent Company) in a 150ml reactor filled with sufficient water (50ml), add 0.1g Pt / C catalyst, and charge H 2 , Make the pressure in the reaction kettle 60atm, heat to 220°C, and react for 2 hours.

[0028] The conversion rate of cellulose and the yield of sorbitol and mannitol were tested according to the following method:

[0029] The reaction product was analyzed by mass spectrometry, and the result showed that the mass-to-charge ratio of 183 molecular ion peak by mass spectrometry was consistent with the molecular ion peak of sorbitol and mannitol that gave a mass-to-charge ratio of 183 molecular weight on the mass spectrum; High performance liquid phase analysis and quantification, (Agilent 1100Series HPLC, purchased by Beijing Agilent Co., Ltd., separation column: HAMILTON HC-75 Calcium Form Cation Eechange, analysis conditions: 30°C, ...

Example Embodiment

[0031] Example 3 Production of sorbitol and mannitol by hydrolyzing cellulose

[0032] Place 1g of microcrystalline cellulose (microcrystalline, purchased from Alfa Aesar) in a 150ml reactor filled with a sufficient amount of water (50ml), add 0.2g of Ru / C catalyst, and fill with H 2 , Make the pressure in the reaction kettle 20atm, heat to 240°C, and react for 1.5 hours.

[0033] The conversion rate of cellulose and the yield of sorbitol and mannitol were tested according to the following method:

[0034] The reaction product was analyzed by mass spectrometry, and the result showed that the mass-to-charge ratio of 183 molecular ion peak by mass spectrometry was consistent with the molecular ion peak of sorbitol and mannitol that gave a mass-to-charge ratio of 183 molecular weight on the mass spectrum; High performance liquid phase analysis and quantification, (Agilent 1100Series HPLC, purchased by Beijing Agilent Co., Ltd., separation column: HAMILTON HC-75 Calcium Form Cation Ee...

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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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