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Preparation of furfural compounds, and mixture for preparing the same

一种混合溶液、化合物的技术，应用在有机化学等方向，能够解决不易分离纯化、不易控制副反应、反应效率低等问题

Active Publication Date: 2013-01-23
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] HMF, which belongs to furfural, can inhibit the growth of microorganisms in the solution, and cannot be synthesized by biological fermentation. It can only be converted from six-carbon sugar by chemical method, but the reaction efficiency is low and difficult to separate and purify due to the difficulty in controlling side reactions.

Method used

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  • Preparation of furfural compounds, and mixture for preparing the same
  • Preparation of furfural compounds, and mixture for preparing the same
  • Preparation of furfural compounds, and mixture for preparing the same

Examples

Experimental program
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Effect test

Embodiment

[0011] The embodiment proposes a preparation method of furfural compounds and a mixed solution thereof. In one embodiment, a method for preparing furfural compounds (taking 5-hydroxymethylfurfural or furfural as an example) includes the following steps. An organic ammonium salt is mixed with a hydroxyl-containing organic solvent to form a solution composition. Next, a carbohydrate is mixed into the solution composition to form a mixed solution. Heating the mixed solution to a reaction temperature converts the carbohydrate into furfural compounds such as 5-hydroxymethylfurfural (HMF) or furfural. The molar ratio of the organic ammonium salt to the hydroxyl group-containing organic solvent is 1 to 9, or 2.5 to 4; the proportion of carbohydrates in the mixed solution is 5 to 20 wt%, or 10 wt%.

[0012] In one embodiment, the organic ammonium salt may be a chain organic ammonium salt or a cyclic organic ammonium salt.

[0013] In one embodiment, the chain organic ammonium salt ...

Embodiment 1

[0028] Choline chloride is mixed with different hydroxyl-containing organic solvents, and in CrCl 2 Catalyst converts glucose to HMF

[0029] In embodiment one, select choline chloride as organic ammonium salt, CrCl 2 as catalyst, and glucose as carbohydrate. Mix choline chloride with each hydroxyl-containing organic solvent according to the required molar ratio and heat to 100°C (heating temperature is less than 120°C) to form a solution composition. After mixing glucose, add CrCl relative to the number of moles of glucose 2 Catalyst, reaction at 100°C (conversion temperature, eg, 100°C-120°C) into HMF product. Table 2 lists each experimental condition and the experimental result of HMF productive rate among the embodiment one.

[0030]Among them, embodiment 1-1 selects 1,3-propanediol as the hydroxyl-containing organic solvent, embodiment 1-2 selects 1,4-butanediol as the hydroxyl-containing organic solvent, and embodiment 1-3 selects diethylene glycol as the hydroxyl-co...

Embodiment 2

[0034] choline chloride and diethylene glycol solvent are mixed according to different ratios or change glucose concentration, and in CrCl 2 Catalyst converts glucose to HMF

[0035] In embodiment two, select choline chloride as organic ammonium salt, diethylene glycol is the hydroxyl organic solvent, CrCl 2 as the catalyst, and glucose as the carbohydrate. Mix choline chloride to diethylene glycol solvent according to the required molar ratio and heat to 100°C to form a solution composition. After mixing glucose, add 6 mol% (relative to the number of moles of glucose) CrCl 2 Catalyst, react at a temperature of 100°C to convert to HMF product.

[0036] Table 3 lists each experimental condition and the experimental result of HMF productive rate among the embodiment two. Among them, in Example 2-1 to Example 2-3, the yields of HMF were 57%, 61% and 56% respectively.

[0037] table 3

[0038]

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Abstract

A method of preparing furfural compounds and a mixture for preparing the same are disclosed. First, a solution is prepared by mixing an organic ammonium salt and a hydroxyl organic solvent. Then, a carbohydrate is mixed with the solution to form a mixture. The mixture is heated to a reaction temperature for conversion of the carbohydrate to produce the furfural compounds.

Description

technical field [0001] The invention relates to a preparation method of furfural compounds and a mixed solution thereof, and in particular to a preparation method capable of high yield of furfural compounds and reducing production cost. Background technique [0002] HMF belongs to the class of furfurals. Furfural (furfural, furfural) is an industrial chemical that can be extracted from various agricultural by-products. It is also an aromatic aldehyde with the chemical formula C 5 h 4 o 2 , the ring structure is shown below. HMF can be produced by dehydration of fructose or glucose. Today, when oil is gradually exhausted and renewable energy is on the rise, HMF has also become a shining star of tomorrow. HMF is an organic compound containing hydroxyl and aldehyde groups. Its structure contains a heterocyclic ring composed of four carbon atoms and one oxygen atom. The molecular formula is C 6 h 6 o 3 , the ring structure is shown below. [0003] [0004] Furfural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/48C07D307/46C07D307/50
CPCC07D307/48C07D307/46
Inventor 施瑞虎许希彦汪进忠
Owner IND TECH RES INST
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