A method for separating and purifying 2,6-dimethoxyphenol from biomass hydrothermal liquefaction liquid phase product

A technology of dimethoxyphenol and hydrothermal liquefaction, which is applied in the field of separation and purification of bio-based chemicals, can solve the problems of obtaining pure industrial chemicals and complex liquid-phase products, achieving huge economic benefits and accelerating the pace of research.

Inactive Publication Date: 2016-08-24
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Due to the complex components of the liquid phase products of biomass hydrothermal liquefaction, industrial chemicals with high purity cannot be obtained from the liquid phase products by a single separation and purification method. Therefore, it is urgent to develop a combination of multiple separation and purification process technologies

Method used

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  • A method for separating and purifying 2,6-dimethoxyphenol from biomass hydrothermal liquefaction liquid phase product
  • A method for separating and purifying 2,6-dimethoxyphenol from biomass hydrothermal liquefaction liquid phase product

Examples

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Effect test

Embodiment 1

[0030] The liquid phase product produced after hydrothermal liquefaction of rice straw, the filtrate after separation by 0.1um microfiltration membrane, under the pressure of 1.0MPa and the temperature of 25°C, is filtered with a roll-type polyamide nanofiltration membrane with a molecular weight cut-off of 160Da , take the membrane filtrate and extract it with dichloromethane, mix and shake and let it stand for 1h to form a well-defined organic phase and aqueous phase. Take the organic phase from the previous step and extract it with saturated aqueous sodium bicarbonate solution, mix and shake it and let it stand for 1 hour to form a well-defined organic phase and aqueous phase. Take the organic phase from the previous step and extract it with a 3g / L aqueous sodium hydroxide solution to adjust the aqueous phase The pH of the mixture was 11, mixed and oscillated and allowed to stand for 1 hour to form a well-defined organic phase and aqueous phase. Take the aqueous phase from t...

Embodiment 2

[0032] The liquid phase product produced after hydrothermal liquefaction of Salix salix, the filtrate after separation by 0.1um microfiltration membrane, under the pressure of 1.0MPa and the temperature of 25°C, is filtered by a roll-type polyamide nanofiltration membrane with a molecular weight cut-off of 160Da Filtrate, take the membrane filtrate and extract it with benzene, mix and shake it and let it stand for 1 hour to form a layered organic phase and an aqueous phase. Take the organic phase from the previous step and extract it with a saturated aqueous solution of sodium bicarbonate, mix it and shake it and let it stand for 1 hour to form a layer Clear organic phase and aqueous phase, take the organic phase from the previous step and extract with 5g / L sodium hydroxide aqueous solution, adjust the pH of the aqueous phase to 13, mix and shake and let stand for 1h to form a distinct organic phase and aqueous phase, Take the aqueous phase from the previous step and use concen...

Embodiment 3

[0034]The liquid phase product produced after hydrothermal liquefaction of water hyacinth, the filtrate after separation by 0.1um microfiltration membrane, under the pressure of 1.0MPa and the temperature of 25°C, is filtered with a roll-type polyamide nanofiltration membrane with a molecular weight cut-off of 160Da Filtrate, take the membrane filtrate and extract it with ethyl acetate, mix and oscillate and let stand for 1h to form a well-defined organic phase and water phase, take the organic phase from the previous step and extract with saturated aqueous sodium bicarbonate solution, mix and oscillate and let stand for 1h, Form a distinct organic phase and aqueous phase, take the organic phase from the previous step and extract it with 3g / L potassium hydroxide aqueous solution, adjust the pH of the aqueous phase to 13, mix and shake and let it stand for 1h to form a distinct organic phase and aqueous phase Phase, take the aqueous phase from the previous step and adjust the pH...

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Abstract

The invention discloses a method for separating and purifying 2,6-dimethoxyphenol from biomass hydrothermal liquefaction liquid phase products. Biomass hydrothermal liquefaction liquid products refer to the water phase substances produced by hydrothermal liquefaction, high pressure liquefaction and other biomass raw materials such as enteromorpha, microalgae, rice straw, Salix salix, tobacco stems, corncobs, sawdust, water hyacinth, etc. . This method first adjusts the acid-base extraction with different pH, then uses silica gel or alumina as the carrier for column chromatography separation, and eluted with organic solvents with different ratios to obtain organic acids, ketones, esters, phenols, etc. Different components, among them, the 2,6-dimethoxyphenol powder can be obtained through spray drying after pooling and concentrating some components. This separation method combines the traditional single-use distillation separation, solvent extraction, column chromatography and other methods to realize the separation of complex biomass hydrothermal liquefaction liquid phase products, and has the advantages of low energy consumption, mild conditions, high separation efficiency, leaching The lotion can be recycled and reused, and it is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of separation and purification of bio-based chemicals, and relates to a process for separating and purifying biomass hydrothermal liquefaction products with complex components, in particular to a process for separating and purifying 2,6-dimethoxy from biomass hydrothermal liquefaction liquid products phenolic method. Background technique [0002] At present, the large-scale exploitation and utilization of fossil energy such as coal, oil and natural gas and the problems caused by environmental pollution and global warming have made energy shortage and environmental degradation a bottleneck restricting the sustainable development of modern economy. The clean and renewable energy has been extensively studied by scholars from various countries. Biomass is the only renewable resource that can be stored, and its own carbon cycle can realize CO 2 Zero emission is a renewable carbon source, and biomass reserves are abundant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/34C07C43/23
CPCC07C41/34C07C41/36C07C41/38C07C41/40C07C43/23
Inventor 张士成吕航郝诗来杨潇陈凯绯曹磊昌陈建民
Owner FUDAN UNIV
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