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Method for preparing surfactant by taking lignin thermo-chemically degraded phenol product as raw material

A surfactant and thermochemical technology, applied in chemical instruments and methods, lignin derivatives, chemical/physical processes, etc., can solve problems such as unsatisfactory performance and application limitations, and achieve excellent water solubility, good economic benefits, The effect of improving responsiveness

Inactive Publication Date: 2012-06-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lignin raw material is cheap, non-toxic, and has certain biodegradability, so it has strong competitiveness among many surfactant raw materials, but its application is limited due to its unsatisfactory performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Alkaline pulping black liquor is subjected to acid precipitation and purification treatment to obtain alkali lignin. Take 50g of alkali lignin and another 200ml of phenol, stir the two evenly, add 2.5g of ferrous sulfide as a catalyst, Liquefaction reaction at ℃ for 1.5h to obtain the liquefied product;

[0030] (2) Add about 100ml of the liquefied product into 200ml of ethanol and stir, the phenolic lignin of the liquefied product precipitates out, let it stand for 0.5h, remove the upper liquid, wash the precipitate with ethanol 3 times, and then vacuum at 50°C Drying to obtain a purified liquefied alkali lignin product;

[0031] (3) Dissolve 5 g of the purified liquefied alkali lignin product in 80 ml of acetone, then add 20 ml of 100 g / L NaOH solution, adjust the water bath to 50 ° C, and add 0.125 mol of 3-chloro-2-hydroxypropyl tris Methyl ammonium chloride, the stirring speed is 300r / min, react for 5h, obtain the modified product;

[0032] (4) Add 10% dilute...

Embodiment 2

[0039](1) Take 70g of lignosulfonate (from acidic sulfite pulping waste liquid), 210ml of ethylene glycol, stir the two evenly, add 0.7g of aluminum silicate as a catalyst, and liquefy at 200°C 2h, obtain the product after liquefaction;

[0040] (2) Add about 100ml of the liquefied product into 200ml of ether and stir, the liquefied lignin product precipitates out, let stand for 0.5h, remove the upper liquid, wash the precipitate with ether for 5 times, and vacuum filter the solid precipitate , followed by vacuum drying at 55°C to obtain a purified lignosulfonate liquefaction product;

[0041] (3) Dissolve 10g of the purified lignosulfonate liquefaction product in 70ml of isopropanol, add 30ml of 100g / L NaOH solution, adjust the reaction temperature to 60°C, and add 0.075mol of propylene oxide under stirring conditions Trimethyl ammonium chloride, the stirring speed is 250r / min, react for 5h, obtain the modified product;

[0042] (4) Add the concentrated modified product to ...

Embodiment 3

[0047] (1) The hydrolyzate in the process of biomass acid hydrolysis and enzymolysis is concentrated and treated with dioxane aqueous solution to extract the lignin. Take 50g of the hydrolyzed lignin and 200ml of ethylene glycol, and stir the two evenly. Add 1.0 g of ferrous sulfide as a catalyst, and liquefy at 240°C for 1.5 hours to obtain a liquefied mixed product;

[0048] (2) Take 40ml of dioxane and 160ml of water in the same 500ml beaker, stir evenly, and take another 100ml of the liquefied mixed product; extract the liquefied mixed product with the above dioxane aqueous solution, and the phenol in the mixed product Lignin phenols are extracted into the upper dioxane aqueous solution, the upper liquid phase is taken, the solvent dioxane and water are distilled off, and the remaining solid is the liquefied lignophenols product, which is vacuum-dried at 50°C to obtain Purified lignophenols products;

[0049] (3) Dissolve 20g of the purified lignophenols in 80ml of water,...

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Abstract

The invention relates to a method for preparing a surfactant by taking a lignin thermo-chemically degraded product as a raw material. The method comprises the following steps of: mixing lignin in a pulping waste liquid or lignin obtained from a waste liquid produced in wood hydrolyzing and biomass smelting processes with high-boiling-point alcohol in the liquid-solid ratio of 3:1-5:1; in the presence of an acid metal salt catalyst, performing liquefying treatment at the temperature of 150-350 DEG C to obtain a liquefied product in which phenols are taken as main materials; and purifying the liquefied product and adding various etherification, esterification, graft copolymerization or crosslinking modification reagents at the temperature of 40-90 DEG C to obtain the surfactant. The surfactant with the method has high water solubility, a wide application range and high surface activity; and the lignin which is subjected to liquefying treatment has the characteristics of suitability for various chemical modifications, low cost and wide application range.

Description

technical field [0001] The invention relates to the field of lignin modification, in particular to a method for preparing surfactants by using lignin thermochemically degraded phenolic products as raw materials. Background technique [0002] In recent years, with the continuous reduction of the total amount of non-renewable fossil resources such as coal, oil, and natural gas, the development and utilization of new energy has become a hot spot in human research, and biomass energy is an important form of solar energy. Inexhaustible, with the advantages of renewable, low pollution, wide distribution, large reserves, etc., is one of the most potential ways to solve the future energy crisis. [0003] The raw materials for the current production of surfactants mainly fall into the following two categories: one is mineral fossil resources, and the other is renewable biomass resources. For now, petroleum raw materials are the most important in the former, followed by fatty acid sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07G1/00C08H7/00B01F17/50C09K23/50
Inventor 武书彬毛翠平赵媛媛李擘
Owner SOUTH CHINA UNIV OF TECH
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