Lignin dispersant for phenol-water coal water slurry, and preparation method and application thereof

A technology of coal water slurry and dispersant, which is applied in the direction of fuel additives, petroleum industry, liquid carbon-containing fuel, etc., can solve the problems of poor stability and low efficiency of dispersant, and achieve good stability, excellent performance-price ratio, and excellent The effect of water solubility

Active Publication Date: 2013-08-28
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a lignin-based high-efficiency dispersant for phenol-water coal-water slurry in view of the problems of low efficiency and poor stability of the existing dispersant for phenol-water coal-water slurry

Method used

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  • Lignin dispersant for phenol-water coal water slurry, and preparation method and application thereof
  • Lignin dispersant for phenol-water coal water slurry, and preparation method and application thereof
  • Lignin dispersant for phenol-water coal water slurry, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Dissolve 100g of wood pulp alkali lignin solid in water, adjust the pH value to 10 with NaOH with a concentration of 30% by weight under stirring, and prepare an aqueous solution with a concentration of 45% by weight, heat it to 80°C while stirring, and add 5g Sodium sulfamate and 5g sodium sulfite were reacted for 1 hour, then 10g formaldehyde was added, and methylolation reaction was carried out for 1 hour to obtain hydroxymethylsulfonated alkali lignin;

[0040] Dissolve 10g of dipotassium hydrogen phosphate and 5g of sodium dihydrogen phosphate in water to prepare a solution with a concentration of 20% by weight, add 10g of epichlorohydrin, heat to 30°C, and react for 100 minutes to obtain hydroxypropyl phosphate compound;

[0041] Mix the hydroxymethylsulfonated alkali lignin and hydroxypropyl phosphate compound obtained by the reaction, adjust the pH to 11 with NaOH with a concentration of 30% by weight, heat up to 85°C, and then add 20g of benzaldehyde to carry o...

Embodiment 2

[0043] Take 100g reed alkali lignin solid and dissolve it in water, adjust the pH value to 9 with NaOH with a concentration of 30% by weight under stirring, and prepare an aqueous solution with a concentration of 40% by weight, heat it to 65°C while stirring, add 5g NaOH Sodium bisulfate, reacted for 2 hours, then added 5g of formaldehyde, and carried out methylolation reaction for 3 hours to obtain hydroxymethylsulfonated alkali lignin;

[0044] Dissolve 5g of disodium hydrogen phosphate in water to prepare a solution with a concentration of 35% by weight, add 10g of epichlorohydrin, heat to 50°C, and react for 120 minutes to obtain hydroxypropyl phosphate compounds;

[0045] Mix the hydroxymethylsulfonated alkali lignin and hydroxypropyl phosphate compound obtained by the reaction, adjust the pH to 12.5 with NaOH with a concentration of 30% by weight, heat up to 80°C, and then add 20g of furfural for polycondensation reaction5 After one hour, cool to room temperature; then a...

Embodiment 3

[0047] Dissolve 60g of bamboo pulp alkali lignin and 40g of bagasse alkali lignin solid in water, adjust the pH value to 12 with NaOH with a concentration of 30% by weight under stirring, prepare an aqueous solution with a concentration of 50% by weight, and heat while stirring To 70°C, add 9g sodium bisulfite and 6g ammonium sulfite, react for 1 hour, then add 15g formaldehyde, carry out methylolation reaction for 2 hours, and obtain hydroxymethylsulfonated alkali lignin;

[0048] Dissolve 15g of sodium dihydrogen phosphate in water to prepare a solution with a concentration of 25% by weight, add 5g of epichlorohydrin, heat to 85°C, and react for 30 minutes to obtain hydroxypropyl phosphate compounds;

[0049] Mix the hydroxymethylsulfonated alkali lignin and hydroxypropyl phosphate compounds obtained by the reaction, adjust the pH to 11.5 with NaOH with a concentration of 30% by weight, heat up to 100°C, and then add 10g of glutaraldehyde for polycondensation After reacting ...

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Abstract

The invention discloses a lignin dispersant for phenol-water coal water slurry, and a preparation method and application thereof. The preparation method comprises the following steps: adding a sulfonating agent into an alkaline alkali lignin solution, then adding formaldehyde, and reacting to obtain hydroxymethyl sulfonated alkali lignin; dissolving phosphate in water, adding epoxy chloropropane, and reacting to obtain a hydroxypropyl phosphate compound; and mixing the hydroxymethyl sulfonated alkali lignin and the hydroxypropyl phosphate compound, adding a condensing agent to perform condensation reaction, and then adding surfactant to obtain the lignin dispersant for phenol-water coal water slurry. The molecule of the lignin dispersant contains multiple hydrophilic functional groups such as sulfonic groups, phosphate groups and the like, so that the lignin dispersant has favorable dispersion/viscosity reduction capacity and stability for phenol-water coal water slurry in case of low consumption. The dispersion/viscosity reduction capacity of the lignin dispersant is far higher than that of the traditional lignosulfonate coal water slurry dispersant; and the dispersion stability of the prepared phenol-water coal water slurry is better in comparison with a naphthalene dispersant.

Description

technical field [0001] The invention relates to a phenol-water coal-water slurry dispersant, in particular to a lignin-based dispersant for phenol-water coal-water slurry and a preparation method and application thereof. Background technique [0002] Coal Water Slurry (CWS) is a new type of clean coal-based liquid fuel. Under the current situation of energy shortage and environmental pollution, CWS has received more and more attention. Coal water slurry technology is a liquefied new fuel made of coal with a certain particle size (about 60-70%), water (about 30-40%) and a small amount of additives. It not only maintains the original physical and chemical properties of coal, but also has good rheology, thixotropy and stability like petroleum. It can be pumped and atomized for combustion, which improves the efficiency of combustion. [0003] In recent years, in order to reduce fuel costs, water gas generators have been widely used in metallurgy, machinery, chemicals, ceramics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/26C10L10/18
Inventor 邱学青杨东杰郭闻源楼宏铭庞煜霞李旭昭
Owner SOUTH CHINA UNIV OF TECH
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