5-hydroxymethylfurfural production technology

A technology of hydroxymethyl furfural and production process, which is applied in the field of chemical industry to achieve the effects of eliminating excessive reaction, improving synchronicity and enhancing micro-mixing effect

Inactive Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the deficiencies in the prior art, the present invention provides a new method for efficiently producing 5-hydroxymethylfurfural and simultaneously reclaiming by-product formic acid and acetic acid, and a kind of impingement flow reactor that is particularly suitable for the process, which passes through multiple The impact realizes the fluid mixing, which has a good microscopic mixing effect. The mixed liquid pushes and flows outside the impact area, providing sufficient residence time for the material, realizing the cascade reaction, and achieving the target conversion rate through the design of the flow channel and liquid flow rate, overcoming Eliminate the shortcomings of current impingement flow reactors that cannot achieve high conversion rates through a single reactor

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0052] The crushed corn stalks and water were injected into the hydrolysis tank according to the mass ratio of 1:1. The pre-hydrolysis temperature was 240°C and the pre-hydrolysis time was 20 min. %.

[0053] The compound extractant used is dimethyl phthalate, n-nonanol, ethyl triphenylphosphine hexafluorophosphate mixed solvent, wherein, dimethyl phthalate accounts for 40wt%, n-octanol accounts for 20wt%, Ethyl triphenylphosphine hexafluorophosphate accounts for 40wt%.

[0054]The feed ratio of extractant and glucose solution is 3:1 (volume ratio), and the feed rate of extractant and glucose solution is equal to the impact flow reactor volume (that is, the feed volume space velocity is 1h -1 , that is, the reaction time is 1h), and the circulating material rate is 200% of the feed amount. Control the reaction temperature to 220°C and the reaction pressure to 3 MPa.

[0055] The experimental results showed that the conversion rate of glucose was 97.1wt%, the yield of 5-hydr...

Embodiment 2

[0057] According to the method of Example 1, the difference is that the feed rate is twice the volume of the impinging flow reactor, that is, the reaction time is 0.5 h.

[0058] The experimental results showed that the conversion rate of glucose was 77wt%, the yield of 5-hydroxymethylfurfural was 60.9wt%, the recovery rate of acetic acid was 93.9wt%, and the recovery rate of formic acid was 90.7wt%.

Embodiment 3

[0060] According to the method of Example 1, the difference is that the feed rate is 0.67 times the volume of the impinging flow reactor, that is, the reaction time is 1.5 h.

[0061] The experimental results showed that the conversion rate of glucose was 99%, the yield of 5-hydroxymethylfurfural was 82.4%, the recovery rate of acetic acid was 94.1%, and the recovery rate of formic acid was 90.7%.

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Abstract

The invention discloses a novel technology for producing 5-hydroxymethylfurfural and simultaneously recovering formic acid and acetic acid. The technology utilizes an impinging stream reactor especially suitable for the technology. Through multiple impinging processes, fluid mixing is realized and good microscopic mixing effects are obtained. The mixed liquid is horizontally pushed to flow outside an impinging zone so that enough staying time is supplied for materials, a stepwise reaction is realized and a desired conversion rate is realized through channel and liquid flow rate designs. The technology solves the problem that the existing impinging stream reactor cannot realize a high conversion rate through a single reactor, simplifies processes, reduces a production cost and an equipment investment and guarantees long-term equipment operation. The technology does not discharge a waste liquid in production and is a green environmental protection technology.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to the production technology of 5-hydroxymethylfurfural, in particular to a process for continuously producing 5-hydroxymethylfurfural by using an impingement flow reactor. Background technique [0002] Biomass is an inexhaustible renewable resource and the only renewable carbon source. After decades of exploration, people have reached a consensus: the production of bio-based chemicals from biomass and the gradual replacement of fossil resources are currently the most feasible, best or only option. How to efficiently prepare bio-based platform chemicals from biomass sugar platform has become a research hotspot of scholars all over the world. [0003] 5-Hydroxymethylfurfural has a boiling point of 183°C and a melting point of 35.2°C under normal pressure. There are functional groups such as aldehyde groups, dienes, and cyclic ethers in its molecular structure, so it has the properties ...

Claims

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Application Information

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IPC IPC(8): C07D307/46C07C51/46C07C51/48C07C53/02C07C53/08
CPCC07D307/46C07C51/46C07C51/48C07C53/02C07C53/08
Inventor 薄德臣孟凡忠张英高明张伟
Owner CHINA PETROLEUM & CHEM CORP
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