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A method for synergistically catalyzing the one-step conversion of cellulose to 1,4-sorbitol

A technology of sorbitan and synergistic catalysis, which is applied in the field of catalysis to achieve the effects of avoiding corrosion and environmental problems, reducing costs and reducing dosage

Active Publication Date: 2020-05-12
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing reactions for the synthesis of 1,4-sorbitol from biomass and its derivatives generally use sorbitol as the starting material, but there are few reports on the one-step synthesis of 1,4-sorbitol from cellulose However, there are many reports on one-step conversion of cellulose into isosorbide

Method used

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  • A method for synergistically catalyzing the one-step conversion of cellulose to 1,4-sorbitol
  • A method for synergistically catalyzing the one-step conversion of cellulose to 1,4-sorbitol
  • A method for synergistically catalyzing the one-step conversion of cellulose to 1,4-sorbitol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Evaluation of the catalytic performance of niobium phosphate obtained at different calcination temperatures to catalyze the conversion of cellulose into 1,4-sorbitan.

[0023] Add 30ml of water into the reaction kettle as a solvent, add 0.3g of α-cellulose as a raw material, add 0.03g of Ru / C (5wt%, Aladdin), 0.3g of niobium phosphate catalyst, and react at 220°C for 3h under a hydrogen atmosphere of 5MPa. After the reaction was cooled down, the liquid phase product was detected and quantitatively analyzed by high performance liquid chromatography.

[0024] Described niobium phosphate catalyst is prepared by hydrothermal method, and its preparation method comprises the following steps:

[0025] Step 1: Preparation of niobium hydroxide: hydrofluoric acid with a molar ratio of 5:1 and niobium pentoxide heated in water at 100°C for 12 hours to obtain niobium fluoride solution; after cooling, titrate with ammonia water until alkaline to obtain niobium hydroxide p...

Embodiment 2

[0031] Embodiment 2: change the catalytic performance evaluation of reacting to the catalyst dosage of niobium phosphate

[0032] The difference between this example and Example 1 is that niobium phosphate (calcined at 450° C.) with better catalytic effect is selected as the catalyst, and the amount of the niobium phosphate catalyst is different.

[0033] Catalytic Performance Evaluation:

[0034] Add 30ml of water as a solvent, 0.3g of α-cellulose as a raw material, 0.03g of Ru / C, and 0.1-0.7g of niobium phosphate as a catalyst in the reaction kettle, and react at 220°C for 3 hours under a 5MPa hydrogen atmosphere. The catalytic effect is shown in Table 2:

[0035] Table 2 Catalytic Performance Evaluation of Different Niobium Phosphate Catalyst Consumption on Reaction

[0036]

Embodiment 3

[0037] Embodiment 3: change Ru / C catalyst consumption to the catalytic performance evaluation of reaction

[0038]The difference between this example and Example 1 is that niobium phosphate (calcined at 450° C.) with better catalytic effect is selected as the acid catalyst, but the amount of Ru / C catalyst is different.

[0039] Catalytic Performance Evaluation:

[0040] Add 30ml of water as a solvent, 0.3g of α-cellulose as a raw material, 0.3g of niobium phosphate, and 0.02-0.07g of Ru / C into the reaction kettle, and react at 220°C for 3 hours under a 5MPa hydrogen atmosphere. The catalytic effect is shown in Table 3:

[0041] Table 3 Catalytic performance evaluation of Ru / C catalyst dosage on the conversion of cellulose to 1,4-sorbitol

[0042]

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PUM

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Abstract

The invention discloses a method for synergistically catalyzing one-step conversion of cellulose into 1,4-sorbitan. The method comprises the following steps: placing cellulose powder into water, and reacting for 1-10 h at 180-260 DEG C and under the hydrogen pressure of 1-7 MPa under a synergistic action of a rhodium phosphate catalyst and a hydrogenation catalyst to obtain the 1,4-sorbitan. By the method, through the synergistic action of the two catalysts and the control of a reaction condition, three processes of hydrolysis, hydrogenation and dehydration are coordinated, the occurrence of aside reaction is suppressed and the one-step conversion of the cellulose into the 1,4-desilaphthol is achieved.

Description

Technical field: [0001] The invention relates to the technical field of catalysis, in particular to a method for synergistically catalyzing the conversion of cellulose into 1,4-sorbitol in one step. Background technique: [0002] The increasing depletion of traditional energy has made the use of renewable resources more and more important. Biomass is abundant in nature, widely distributed, and is the only renewable resource containing carbon. Among them, cellulose is an important component of biomass, and its carbon content accounts for more than 50% of the carbon content in the plant kingdom. The utilization and conversion of cellulose is of great significance to the development of renewable energy. The high-value utilization of cellulose is mainly to convert cellulose into various platform compounds, and then convert these platform compounds into various high-value chemicals and chemical fuels. 1,4-Sorbitan, another name: 1,4-Sorbitan; 1,4-Sorbitan; 1,4-Anhydro-D-Sorbito...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/20
CPCC07D307/20
Inventor 刘琪英张彩红马隆龙王晨光王海永朱长辉李丹
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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