Ionic liquid microemulsion and its preparation method and use

A technology of ionic liquid and microemulsion, which is applied in the direction of mixing methods, chemical instruments and methods, and dissolution, can solve the problems of high viscosity of ionic liquids, low accessibility and low permeability of fiber raw materials, and improve the efficiency of enzymatic hydrolysis and saccharification. The effect of improving pretreatment efficiency and low price

Inactive Publication Date: 2015-03-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be used as a pretreatment solvent to initially open the internal structure of lignocellulosic raw materials, but due to the high viscosity of ionic liquids, there are problems of low accessibility and permeability to fiber raw materials

Method used

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  • Ionic liquid microemulsion and its preparation method and use
  • Ionic liquid microemulsion and its preparation method and use
  • Ionic liquid microemulsion and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] With hydrophilic ionic liquid [BMIM]Cl as the main body, lipophilic ionic liquid [BMIM]PF 6 As the core, the cationic surfactant CTAB (cetyltrimethylammonium bromide) and the co-surfactant n-butanol are used as the mixed interfacial film to form [BMIM]PF 6 / [BMIM]Cl type ionic liquid microemulsion, its preparation method is as follows:

[0030] Add the four components of the microemulsion according to the mass ratio m (surfactant): m (co-surfactant): m (hydrophilic ionic liquid): m (lipophilic ionic liquid) = 1:6:8:4 In a transparent glass reaction container, after adding a magnetic stirrer, place the container in a magnetic stirring constant temperature water bath, set the temperature at 40°C, and stir at a speed of 300r / min for 20min until the system is clear and transparent and centrifuged at a high speed of 30000r / min for 5min. layered. After the ionic liquid microemulsion is prepared, it is placed in a grinding bottle for later use. At the same time, the electri...

Embodiment 2

[0035] Add the four components of the microemulsion according to the mass ratio m (surfactant): m (co-surfactant): m (hydrophilic ionic liquid): m (lipophilic ionic liquid) = 1:10:12:4 In a transparent glass reaction container, after adding a magnetic stirrer, place the container in a magnetic stirring constant temperature water bath, set the temperature at 50°C, and stir at a speed of 300r / min for 20min until the system is clear and transparent and centrifuged at a high speed of 30000r / min for 5min. layered. After the ionic liquid microemulsion is prepared, it is placed in a grinding bottle for later use. At the same time, the electrical conductivity and wood permeability of the configured ionic liquid microemulsion were characterized and tested.

[0036] The prepared ionic liquid microemulsion and 80 mesh masson pine wood powder (water content 7%) are added in the round bottom flask with condensing system according to the liquid-solid ratio 30:1ml / g (wood powder is calculat...

Embodiment 3

[0040]Add the four components of the microemulsion according to the mass ratio m (surfactant): m (co-surfactant): m (hydrophilic ionic liquid): m (lipophilic ionic liquid) = 1:14:12:6 In a transparent glass reaction container, after adding a magnetic stirrer, place the container in a magnetic stirring constant temperature water bath, set the temperature at 50°C, and stir at a speed of 300r / min for 20min until the system is clear and transparent and centrifuged at a high speed of 30000r / min for 5min. layered. After the ionic liquid microemulsion is prepared, it is placed in a grinding bottle for later use. At the same time, the electrical conductivity and wood permeability of the configured ionic liquid microemulsion were characterized and tested.

[0041] The prepared ionic liquid microemulsion and 80 mesh masson pine wood powder (water content 7%) are added in the round bottom flask with condensing system according to the liquid-solid ratio 25:1ml / g (wood powder is calculate...

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Abstract

The invention discloses an ionic liquid microemulsion and its preparation method and use. The ionic liquid microemulsion is a [BMIM]PF6 / [BMIM]Cl type ionic liquid microemulsion composed of a hydrophilic ionic liquid [BMIM]Cl as a main body, a lipophilic ionic liquid [BMIM]PF6 as a core, and a cationic surface active agent CTAB and a cosurfactant n-butanol as a mixed interfacial film. The preparation method comprises the following steps of adding the four components of the microemulsion into a reaction container, after adding a magnetic stirrer, putting the container into a magnetic stirring constant-temperature water bath kettle, keeping the temperature between 40 and 60 DEG C, and carrying out stirring until the system is clear and transparent and is not layered after being centrifugation at a high rate of 30000r / min for 5min. The ionic liquid microemulsion can be used for pre-treatment on wood fiber biomass. The ionic liquid microemulsion can reduce ionic liquid system viscosity and improves permeability and accessibility of drugs into a biomass raw material.

Description

technical field [0001] The invention relates to a novel ionic liquid microemulsion, in particular to a preparation method of the ionic liquid microemulsion and its application in lignocellulosic biomass pretreatment. Background technique [0002] With the depletion of petroleum energy and serious environmental degradation, people urgently need to find a green alternative energy while reducing its negative impact on the environment. Lignocellulosic biomass is the most abundant and cheapest renewable resource on earth, with a total annual output of up to 1×10 10 Mt, so the preparation of bioethanol has been paid more and more attention by domestic and foreign scholars and entrepreneurs. However, due to the complex and dense structure of biomass itself, the technology of producing ethanol from woody biomass still has problems such as high cost and low efficiency, among which the immature raw material pretreatment technology has become one of the bottlenecks limiting the high-v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F3/08C12P7/06
CPCY02E50/17Y02E50/10
Inventor 杨仁党李龙刘德桃杨飞
Owner SOUTH CHINA UNIV OF TECH
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