Method of refining wood vinegar based on emulsion liquid membrane

A technology of emulsified liquid membrane and wood vinegar, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effects of simplified technical process, small investment in personnel and equipment, and simple unit operation

Pending Publication Date: 2017-02-22
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Refining wood vinegar by emulsified liquid membrane method has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Emulsion preparation conditions: at room temperature, take 33.8 mL of kerosene as the film phase solvent, 2 mL of liquid paraffin as a stabilizer, 3.2 mL of surfactant T154, and 1 mL of carrier TBP in an emulsifying beaker, ultrasonic for 5-10 min, 1500 r / min Slowly add 40 mL of 0.3 mol / L NaOH solution dropwise, and emulsify at 4500 r / min for 20 min.

[0017] Liquid film dephenolization conditions: At room temperature, take 20 mL of the emulsion prepared under the above conditions, and 60 mL of jujube husk wood vinegar solution for mass transfer at 300 r / min for 15 min.

[0018] The removal rate of phenols in wood vinegar was 57.09% under this technology.

Embodiment 2

[0020] Emulsion preparation conditions: at room temperature, take 33.6 mL of kerosene as the film phase solvent, 2 mL of liquid paraffin as a stabilizer, 3.2 mL of surfactant T154, and 1.2 mL of carrier TBP in an emulsifying beaker, ultrasonic for 5-10 min, 1500 r / min Slowly add 40 mL of 0.5 mol / L NaOH solution dropwise, and emulsify at 4500 r / min for 20 min.

[0021] Liquid film dephenolization conditions: At room temperature, take 20 mL of the emulsion prepared under the above conditions, and 60 mL of jujube husk wood vinegar solution for mass transfer at 300 r / min for 15 min.

[0022] The removal rate of phenols in wood vinegar was 56.35% under this technology.

Embodiment 3

[0024] Emulsion preparation conditions: at room temperature, take 33.6 mL of kerosene as the film phase solvent, 2 mL of liquid paraffin as a stabilizer, 3.2 mL of surfactant T154, and 1.2 mL of carrier TBP in an emulsifying beaker, ultrasonic for 5-10 min, 1500 r / min Slowly add 48 mL of 0.6 mol / L NaOH solution dropwise, and emulsify at 4500 r / min for 20 min.

[0025] Liquid film dephenolization conditions: At room temperature, take 20 mL of the emulsion prepared under the above conditions, and 60 mL of jujube husk wood vinegar solution for mass transfer at 300 r / min for 15 min.

[0026] The removal rate of phenols in wood vinegar was 51.58% under this technology.

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Abstract

The invention discloses a method of refining the wood vinegar based on an emulsion liquid membrane. The method specifically comprises the following steps: (1) preparing an emulsion liquid membrane through adopting the following components in concentration: 5% of liquid paraffin, 2-10% of surfactant T154, 0-3.5% of tri-n-butyl phosphate as a carrier and 0.2-1 mol/L of internal-phase NaOH, wherein the volume ratio of the oil phase of the membrane to the aqueous NaOH solution is 5:2 - 5:8; subjecting above materials to ultrasonic treatment for 5-10 minutes, and then subjecting the materials to emulsification treatment for 5-30 minutes at 4500 r/min, wherein the concentration of each of the above materials is respectively the volume percentage of the material to the total volume of the oil phase of the membrane and the oil phase solvent of the membrane is composed of kerosene; (2) dephenolizing the emulsion liquid membrane with the volume ratio of the emulsion liquid membrane to the to-be-processed wood vinegar to be 1:2 - 1:10, wherein the mass transfer time is 5 -40 minutes, and the stirring speed is 150 - 500 r/min. the method is simplified in technical process, simple in unit operation, small in personnel and equipment investment and low in energy consumption. Meanwhile, the repeated recycle and reuse is enabled.

Description

technical field [0001] The invention belongs to the technical field of refining wood vinegar, in particular to a method for refining wood vinegar with an emulsified liquid film. Background technique [0002] Wood vinegar, also known as plant acid, is an important biomass chemical product, which is widely used in various industries such as agriculture, medicine, food additives, and cosmetics. However, due to the complex composition of crude wood vinegar, which contains tar, phenols, benzene and benzene derivatives and other toxic components to organisms, and some chemical components are easily oxidized, polymerized and discolored, the chemical properties of crude wood vinegar It is unstable and cannot be directly applied to industries such as medicine and food. Therefore, wood vinegar needs to be refined according to its application. At present, the refining methods used in wood vinegar are: distillation, low temperature freezing and thawing, ion exchange resin adsorption, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/40C10C5/00
CPCB01D61/40C10C5/00Y02E50/10
Inventor 赵彦巧朱志勇李建颖段茜男
Owner TIANJIN UNIV OF COMMERCE
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