Separation method for solid-phase biomass hydrothermal liquefaction products

The technology of a hydrothermal liquefaction and separation method is applied in the field of biomass waste resource utilization, which can solve the problems of inability to obtain high value-added chemicals of biomass hydrothermal liquefaction products, inability to separate compounds, and high cost, thereby achieving huge economic benefits. Effectiveness and eco-efficiency, accelerated research pace, low-cost effect

Active Publication Date: 2014-04-30
FUDAN UNIV
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Problems solved by technology

The Chinese patent application with application number 201210050527.6 discloses a method for separating and upgrading bio-oil. This method uses a complexing agent to separate phenolic compounds and metal salts. Separation of four types of pentenones
However, some other methods of refining biomass hydrothermal liquefaction products, such as catalytic hydrogenation, can only improve the quality of biomass hydrothermal liquefaction products, and cannot obtain high value-added chemicals of biomass hydrothermal liquefaction products, and are expensive

Method used

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  • Separation method for solid-phase biomass hydrothermal liquefaction products
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  • Separation method for solid-phase biomass hydrothermal liquefaction products

Examples

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Effect test

Embodiment 1

[0032] Weigh 20.00 g of rice straw hydrothermal liquefaction solid phase product, the water content is 62.13%. Dissolve it in 100ml of 3.5 wt.% NaOH solution, put it on a magnetic stirrer and stir for 30 min, after fully reacting, separate the solid from the liquid.

[0033] 10% HCl solution was added dropwise to the liquid phase to adjust the pH value to 2, and the solution was acidic. The solubility of phenolic substances decreased, dissolved and precipitated, and the supernatant was evaporated in an oven at 65 °C to remove water, and the insoluble matter was sodium chloride. Produce viscous precipitate, mainly phenolic compounds. The precipitate was extracted by adding 100ml of weak polar organic solvent dichloromethane, and the filtrate and residue were obtained by filtration. After the filtrate was rotary evaporated, the product A-1 was obtained. A-1 was mainly rich in phenolic compounds, and the product quality was 0.79g; the residue was further added 100ml of tetrahyd...

Embodiment 2

[0036] Weigh 20.00 g of rice straw hydrothermal liquefaction solid phase product, the water content is 62.13%. Dissolve it in 100ml of 3 wt.% NaOH solution, put it on a magnetic stirrer and stir for 30 min, after fully reacting, separate the solid from the liquid.

[0037] 10% HCl solution was added dropwise to the liquid phase to adjust the pH value to 1.5, and the solution was acidic. The solubility of phenolic substances decreased, dissolved and precipitated, and the supernatant was evaporated in an oven at 65 °C to remove water, and the insoluble matter was sodium chloride. The precipitate is thick, containing a small amount of water, mainly phenolic compounds. The precipitate was viscous, mainly phenolic compounds. The precipitate was extracted by adding 100ml weak polar organic solvent ether, and the filtrate and residue were obtained by filtration. After the filtrate was rotary evaporated, the product A-1 was obtained. A-1 was mainly rich in phenolic compounds, and th...

Embodiment 3

[0040] Weigh 20.00 g of rice straw hydrothermal liquefaction solid phase product, the water content is 62.13%. It was dissolved in 100ml of 4 wt.% NaOH solution, placed on a magnetic stirrer and stirred for 30 min, and after fully reacting, the solid and liquid were separated.

[0041] 10% HCl solution was added dropwise to the liquid phase to adjust the pH value to 1.5, and the solution was acidic. The solubility of phenolic substances decreased, dissolved and precipitated, and the supernatant was evaporated in an oven at 65 °C to remove water, and the insoluble matter was sodium chloride. The precipitate is thick, containing a small amount of water, mainly phenolic compounds. The precipitate was viscous, mainly phenolic compounds. The precipitate was extracted by adding 100ml of weak polar organic solvent ethyl acetate, and the filtrate and residue were obtained by filtration. After the filtrate was rotary evaporated, the product A-1 was obtained. A-1 was mainly rich in ph...

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Abstract

The invention belongs to the field of resource utilization of biomass waste, and particularly relates to a separation method for solid-phase biomass hydrothermal liquefaction products. The solid-phase biomass hydrothermal liquefaction products refer to solid-phase products (comprising oil-phase products and solid residues) obtained by the hydrothermal liquefaction reaction of biomasses, wherein the biomasses comprise enteromorpha, microalgae, rice straws, salix psammophila, tobacco stems, corncobs, sawdust, water hyacinths and the like. According to the method, the solid-phase biomass hydrothermal liquefaction products are mainly used as raw materials, a separation scheme of performing alkali washing and acidification and sequentially and stepwise extracting products by using organic solvents with different polarities is adopted, and the obtained products are analyzed, so that phenol, fatty acid, furan and cyclopentenone compounds can be separated in a way of combining multi-stage solution pH regulation and multi-stage stepwise extraction with the organic solvents with different polarities; the separation method is simple and convenient, environment-friendly, less in pollution, low in cost and favorable for industrial production, and the solvents can be recycled.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of biomass waste, and in particular relates to a method for separating solid-phase products of biomass hydrothermal liquefaction. Background technique [0002] Today's society mainly relies on traditional fossil energy, and 74% of the world's total energy consumption comes from fossil energy such as coal, oil, and natural gas. The application of fossil energy has promoted the development of society, but resources are increasingly depleted. Biomass is the only renewable resource that can be stored. Its own carbon cycle can realize zero emission of carbon dioxide in the process of utilization. The more important the status has become a research hotspot. [0003] Biomass can be converted into bio-based chemicals through physical, chemical, biological and other technical means. Biomass hydrothermal liquefaction product is a research hotspot in recent years. Biomass hydrothermal liquef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B63/00
Inventor 张士成张婷婷李长军杨潇张哲陈建民
Owner FUDAN UNIV
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