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Modified styrene adsorption resin, preparation method of modified styrene adsorption resin and application of modified styrene adsorption resin to refining of lignocellulose hydrolysate

A lignocellulosic and styrene-based technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as poor adsorption performance, and achieve improved hydrophilicity and high selectivity resistance, reducing the effect on microbial growth and fermentation

Active Publication Date: 2018-08-03
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to its strong hydrophobicity, in addition, its pore structure is mainly concentrated in the mesopore and macropore regions, resulting in poor adsorption performance for small molecule hydrophilic inhibitors in lignocellulose hydrolyzate. This problem needs to be solved urgently to realize the Efficient Utilization of Lignocellulosic Biomass Resources

Method used

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  • Modified styrene adsorption resin, preparation method of modified styrene adsorption resin and application of modified styrene adsorption resin to refining of lignocellulose hydrolysate
  • Modified styrene adsorption resin, preparation method of modified styrene adsorption resin and application of modified styrene adsorption resin to refining of lignocellulose hydrolysate
  • Modified styrene adsorption resin, preparation method of modified styrene adsorption resin and application of modified styrene adsorption resin to refining of lignocellulose hydrolysate

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Embodiment 1

[0034] Such as Figure 1~4 Shown, the preparation of modified styrene-based adsorption resin comprises the following steps:

[0035] 1) Precursor resin synthesis

[0036] The precursor resin is synthesized by suspension polymerization, and the specific steps are as follows: 240mL of the water phase (the water phase contains 0.75% polyvinyl alcohol and 3-5 drops of 1% methylene blue solution by mass fraction) is added with a mechanical Stir, place in a 500mL three-neck flask with a thermometer and a serpentine condenser, place in an oil bath and heat to 50°C, then add the oil phase to the water phase (add 4g of styrene monomer, 20g of divinylbenzene, methacrylic acid Glycidyl ester 16g, toluene 20g, n-heptane 20g and benzoyl peroxide 0.4g), feed nitrogen 5min after, adjust stirring speed to be 160rpm, control oil droplet size. Then slowly raise the temperature to 80°C and react for 5 hours. After the reaction, the products obtained are washed alternately with hot water and de...

Embodiment 2

[0046] Same as Example 1, except that 18 g of styrene and 2 g of glycidyl methacrylate were added to obtain the modified styrene-based adsorption resin St-DVB-10% GMA-10h-pc.

[0047] The BET specific surface area of ​​St-DVB-10%GMA-10h-pc is 544.66m 2 / g, the pore volume is 1.03cm 3 / g, the average pore diameter is 8.74nm.

Embodiment 3

[0049] Same as Example 1, except that glycidyl methacrylate was replaced by methyl acrylate to obtain modified styrene-based adsorption resin St-DVB-80%MA-10h-pc.

[0050] The BET specific surface area of ​​St-DVB-80%GMA-10h-pc is 475.29m 2 / g, the pore volume is 1.36cm 3 / g, the average pore diameter is 11.48nm.

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Abstract

The invention provides modified styrene adsorption resin, a preparation method of the modified styrene adsorption resin and application of the modified styrene adsorption resin to refining of lignocellulose hydrolysate. The preparation method of the modified styrene adsorption resin comprises the following steps: sequentially adding an acrylate monomer, a styrene monomer, a cross-linking agent, aninitiating agent a pore-forming agent to an aqueous solution containing a dispersing agent, and performing suspension polymerization reaction to obtain precursor resin; and performing Friedel-Craftsreaction on the precursor resin under the action of Lewis acid as a catalyst to obtain the modified styrene adsorption resin. By modifying the acrylate unit in the styrene adsorption resin, the acrylate unit contains an ester group which can form intermolecular hydrogen bonding with water molecules, thereby greatly improving the hydrophilicity of the modified styrene adsorption resin and being favorable for adsorbing hydrophilic fermentation inhibitors in the lignocellulose hydrolysate.

Description

Technical field: [0001] The invention belongs to the technical field of comprehensive utilization of lignocellulosic biomass, and in particular relates to a modified styrene-based adsorption resin, its preparation method and its application in refining lignocellulose hydrolyzate. Background technique: [0002] Lignocellulose is a general term for a class of substances formed by the tight combination of cellulose, hemicellulose, and lignin through covalent or non-covalent bonds. It is a biological resource with a wide range of sources and low prices in nature. Using lignocellulose as raw material to prepare biofuels and high value-added chemical products is an effective way to solve the energy crisis. However, the process of converting lignocellulose into biofuel is a complex reaction process, which mainly includes three processes of pretreatment, hydrolysis and fermentation. Among them, in the hydrolysis process, in addition to producing fermentative sugars (glucose, xylose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C08F212/36C08F212/08C08F220/32C08F220/14C08F222/14
CPCB01J20/261B01J20/265B01J20/28054C08F212/08C08F212/36C08F220/14C08F222/1006C08F222/102C08F220/325C08F220/18
Inventor 陈新德黄前霖陈雪芳林晓清张海荣熊莲黄超郭海军王璨
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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