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Amphoteric humate coal water slurry dispersant as well as preparation and application thereof

A humate and humic acid technology, applied in the field of coal-water slurry dispersants, can solve the problems of poor hydrophilicity, poor stability, good dispersibility, etc., and achieve the effects of reducing apparent viscosity, low price, and small amount of addition

Inactive Publication Date: 2014-11-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to previous research results, it was found that when humate is used as a dispersant for coal-water slurry, it has the problem of good dispersibility but poor hydrophilicity and stability, which leads to the need to use a certain amount of stabilizer when used in the preparation of coal-water slurry

Method used

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  • Amphoteric humate coal water slurry dispersant as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) In the 50kg sodium humate reactor, add 150kg water, after stirring and dissolving at room temperature, adjust the pH to 10 with sodium hydroxide, then add 20kg formaldehyde and 10kg sulfonating agent sodium bisulfite, stir and heat up to 80°C, after 4 hours of reaction, it was cooled to room temperature.

[0021] (2) Get the cationic etherifying agent 3-chloro-2-hydroxypropyl-trimethylammonium chloride relative to 8% of the sodium humate quality, after dissolving with an appropriate amount of water, join step (1) reactor , stirring and reacting for 2 hours; then adding 3% glutaraldehyde relative to the mass of sodium humate at one time, continuing to stir and react for 2 hours, and spray drying to obtain a new type of amphoteric humate coal-water slurry dispersant powder.

Embodiment 2

[0023] (1) In the 50kg potassium humate reactor, add 100kg of water, stir and dissolve at room temperature, adjust the pH to 11 with sodium hydroxide, then add 10kg of formaldehyde and 10kg of sulfonating agent sodium bisulfite, stir and heat up to 70°C, reacted for 3 hours and then cooled down to room temperature.

[0024] (2) Get the cationic etherification agent 3-chloro-2-hydroxypropyl-trimethylammonium chloride relative to the 6% of potassium humate quality, after dissolving with an appropriate amount of water, join step (1) reactor , stirring and reacting for 2 hours; then adding 4% epichlorohydrin relative to the mass of potassium humate at one time, continuing to stir and react for 3 hours, and spray drying to obtain a new type of amphoteric humate coal-water slurry dispersant powder.

Embodiment 3

[0026] (1) In the reactor that 50 parts by mass of ammonium humate is housed, add 130kg of water, after stirring and dissolving at room temperature, adjust the pH to 10 with sodium hydroxide, then add 20kg of formaldehyde and 15kg of sulfonating agent sodium sulfite, stir and heat up to 65 °C, and cooled to room temperature after 3 hours of reaction.

[0027] (2) Get the cationic etherifying agent 3-chloro-2-hydroxypropyl-trimethylammonium chloride relative to 5% of the ammonium humate quality, after dissolving with an appropriate amount of water, join step (1) reactor , stirring and reacting for 1.5 hours; then adding 3% glyoxal relative to the mass of ammonium humate at one time, continuing to stir and react for 3 hours, and spray drying to obtain a new type of amphoteric humate coal-water slurry dispersant powder.

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Abstract

The invention discloses a preparation method of an amphoteric humate coal water slurry dispersant. The preparation method comprises the following steps: preparing sulfomethylated humic acid by reaction of humic acid, formaldehyde and a sulfonating agent; then further performing cationization reaction on sulfomethylated humic acid and a cationic etherifying agent and finally dropping a cross-linking agent to perform cross-linking reaction so as to obtain the novel amphoteric humate coal water slurry dispersant. The method for preparing the coal water slurry dispersant comprises three steps of sulfomethylation, cationization and cross-linking reaction, and anionic and cationic groups are introduced on a matrix of the humic acid, so that the relative molecular weight of the dispersant is also increased; by using the novel dispersant, the apparent viscosity of the coal water slurry can be effectively reduced and the stability of the coal water slurry can be also obviously improved.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry dispersants, and in particular relates to an amphoteric humic acid-based coal-water slurry dispersant and its preparation and application. Background technique [0002] Coal water slurry is a new type of liquid fuel that replaces oil with coal. Generally, it is a stable solid-liquid system formed by mixing and uniformly dispersing about 70% of coal, about 30% of water and about 1% of dispersant. , it not only retains the flammability and reduction properties of the original coal, but also has the same fluidity and stability as petroleum, which is convenient for pipeline transportation, has the advantages of high combustion efficiency, low pollution emissions and low cost. [0003] The traditional dispersants commonly used at present mainly include naphthalenesulfonic acid condensates and lignosulfonates, which are not ideal in terms of dispersibility, stability, and price and cost. Humi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
Inventor 张光华贾宇荣李俊国朱军锋
Owner SHAANXI UNIV OF SCI & TECH
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