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A Multi-stage Membrane Separation and Series Process for Graded Utilization of Biomass Hydrothermal Liquefaction Liquid Phase Products

A technology for hydrothermal liquefaction and membrane separation, applied in semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., can solve problems such as shortage, and achieve the effect of development promotion, huge economic benefits, improvement effect and efficiency

Active Publication Date: 2016-04-20
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Public patents at home and abroad have been reported, but the research is mainly focused on the fields of membrane separation to obtain hemicellulose or the separation of acetic acid from concentrated sugars. Inventions with thermal liquefaction hydrolyzate as the research object are relatively lacking

Method used

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  • A Multi-stage Membrane Separation and Series Process for Graded Utilization of Biomass Hydrothermal Liquefaction Liquid Phase Products
  • A Multi-stage Membrane Separation and Series Process for Graded Utilization of Biomass Hydrothermal Liquefaction Liquid Phase Products
  • A Multi-stage Membrane Separation and Series Process for Graded Utilization of Biomass Hydrothermal Liquefaction Liquid Phase Products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The liquid phase product produced after hydrothermal liquefaction of rice straw, the filtrate after separation by 0.45um microfiltration membrane, is filtered with roll-type ultrafiltration membrane A with a molecular weight cut-off of 1000Da under the pressure of 0.2MPa and temperature of 30°C. The volume ratio of the filtrate to the concentrated liquid is 5:1, collect and store the concentrated liquid A at low temperature; take the filtrate A as a roll-type nanofiltration membrane B with a molecular weight cut-off of 360Da, and filter it under the pressure of 0.8 MPa and at a temperature of 40°C. The volume to concentrate volume ratio is 4:1, collect and store the concentrate B at low temperature; take the filtrate B as roll-type nanofiltration membrane C with a molecular weight cut-off of 150Da, and filter it under the pressure of 2.5MPa and the temperature of 40°C, the volume of the filtrate The volume ratio to the concentrate is 3:1, collect and store the concentrat...

Embodiment 2

[0035]The liquid phase product produced after hydrothermal liquefaction of rice straw, the filtrate after separation by 0.45um microfiltration membrane, is filtered with roll-type ultrafiltration membrane A with a molecular weight cut-off of 10000Da under the pressure of 0.2MPa and temperature of 30°C. The volume ratio of the filtrate to the concentrated liquid is 5:1, collect and store the concentrated liquid A at low temperature; take the filtrate A as a roll-type nanofiltration membrane B with a molecular weight cut-off of 360Da, filter it under 0.5 MPa pressure and a temperature of 40°C, and the filtrate The volume to concentrate volume ratio is 4:1, collect and store the concentrate B at low temperature; take the filtrate B as roll-type nanofiltration membrane C with a molecular weight cut-off of 150Da, and filter it under the pressure of 2.5MPa and the temperature of 40°C, the volume of the filtrate The volume ratio to the concentrate is 3:1, collect and store the concent...

Embodiment 3

[0038] The liquid phase product produced after hydrothermal liquefaction of rice straw, the filtrate after separation by 0.45um microfiltration membrane, is filtered with roll-type ultrafiltration membrane A with a molecular weight cut-off of 20000Da under the pressure of 0.2MPa and temperature of 30°C. The volume ratio of the filtrate to the concentrated liquid is 5:1, collect and store the concentrated liquid A at low temperature; take the filtrate A as a roll-type nanofiltration membrane B with a molecular weight cut-off of 360Da, and filter it under a pressure of 1.0MPa and a temperature of 40°C. The volume to concentrate volume ratio is 4:1, collect and store the concentrate B at low temperature; take the filtrate B as roll-type nanofiltration membrane C with a molecular weight cut-off of 150Da, and filter it under the pressure of 2.5MPa and the temperature of 40°C, the volume of the filtrate The volume ratio to the concentrate is 3:1, collect and store the concentrate C a...

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Abstract

The invention discloses that the invention provides an ultrafiltration membrane-nanofiltration membrane-nanofiltration membrane multi-stage membrane separation series process for extracting sugar, phenol and acid components 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. . The ultrafiltration membrane-nanofiltration membrane-nanofiltration membrane multi-stage membrane separation series process is used to treat the liquid phase products of biomass hydrothermal liquefaction. This process classifies the components with different molecular sizes in the hydrolyzate. Sugar enrichment solution, small molecule phenolic / cyclopentenone compound enrichment solution and acetic acid enrichment solution are ready for downstream separation and purification to extract high value-added products or other applications such as fermentation, and use as much as possible The product in the hydrolyzate can exert comprehensive economic benefits.

Description

technical field [0001] The invention belongs to the fields of environment, green chemical industry and new energy, and relates to the separation process of biomass hydrolyzate with complex components, and specifically relates to the process of treating biomass by adopting ultrafiltration membrane-nanofiltration membrane-nanofiltration membrane multi-stage membrane separation series process Hydrothermal liquefaction of liquid phase products, fractionation of components with different molecular sizes in the hydrolyzate, the whole process will obtain the enrichment solution of sugar, the enrichment solution of small molecule phenols / cyclopentenone compounds and the enrichment of acetic acid liquid. Background technique [0002] The two most important challenges in today's society are the increasing environmental damage and the pressure of energy shortage. A cross-cutting problem in these two fields is to seek and develop new clean and renewable energy sources. Because fossil e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/58
Inventor 张士成吕航陈凯绯杨潇郝诗来罗刚陈建民
Owner FUDAN UNIV
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