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Hydrophilous slurry additive with mediben lignin and production thereof

A wheat straw alkali lignin and coal-water slurry technology, applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of good dispersion viscosity reduction performance, low additive efficiency, poor dispersion viscosity reduction performance, etc. Excellent viscosity, low production cost, improved dispersion and viscosity reduction

Inactive Publication Date: 2006-08-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of wheatgrass alkali lignin coal-water slurry additive for the defects of low efficiency and poor dispersion and viscosity-reducing performance of the existing lignosulfonate coal-water slurry additive, and the obtained additive has dispersion and viscosity-reducing performance Good, the shear resistance of the pulp is good, which effectively overcomes the phenomenon of lignosulfonate additive pulping plugging

Method used

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  • Hydrophilous slurry additive with mediben lignin and production thereof
  • Hydrophilous slurry additive with mediben lignin and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 100g of dry wheatgrass alkali lignin powder, add 150g of water, and add NaOH aqueous solution with a mass concentration of 20% to adjust the pH value to 9, heat to a certain operating temperature while stirring, and the operating temperature is controlled at 90°C. Add 20g of formaldehyde for methylolation reaction for 1 hour; take 60g of the mixture of sodium metabisulfite and sodium bisulfite, add 100g of water and stir to dissolve, heat up to 45°C, add 40g of acetylacetone, and react for 30 minutes; The reaction intermediates were mixed, and adding mass concentration while stirring was 50% H 2 SO 4 The pH value of the aqueous solution was adjusted to 5, and the temperature was raised to 90° C. During this process, 20 g of formaldehyde was added dropwise to carry out polycondensation reaction, and the reaction was carried out for 3 hours. After cooling, the high-efficiency coal-water slurry additive liquid product can be obtained, and then the powder product can ...

Embodiment 2

[0035] Take 100g of dried wheatgrass alkali lignin powder, add 200g of water, and add 20% NaOH aqueous solution to adjust the pH value to 9.5, and heat to a certain operating temperature while stirring, and the operating temperature is controlled at 85 ° C. During this process, drop Add 30g of glyoxal for methylolation reaction for 1.5 hours; take 40g of sodium sulfite, add 120g of water and stir to dissolve, heat up to 50°C, add 30g of ketene, and react for 30 minutes; mix the two reaction intermediates obtained above, and Add dropwise H2O with a mass concentration of 50% while stirring 2 SO 4The pH value of the aqueous solution was adjusted to 6, and the temperature was raised to 85°C. During this process, 10 g of glyoxal was added dropwise to carry out polycondensation reaction, and the reaction lasted for 3.5 hours. After cooling, the high-efficiency coal-water slurry additive liquid product can be obtained, and then the powder product can be obtained after drying.

Embodiment 3

[0037] Take 100g of dry wheatgrass alkali lignin powder, add 180g of water, and add NaOH aqueous solution with a mass concentration of 20% to adjust the pH value to 9, heat to a certain operating temperature while stirring, and the operating temperature is controlled at 90 ° C. During this process, drop Add 30g of propionaldehyde for methylolation reaction for 1.5 hours; take 30g of sodium metabisulfite, add 150g of water and stir to dissolve, heat up to 45°C, add 45g of a mixture of cyclohexanone and acetylacetone, and react for 35 minutes; The reaction intermediates were mixed, and while stirring, the mass concentration of 50% H was added dropwise. 2 SO 4 The pH value of the aqueous solution was adjusted to 5, and the temperature was raised to 80° C. During this process, 20 g of a mixture of formaldehyde and propionaldehyde was added dropwise to carry out polycondensation reaction for 4 hours. After cooling, the high-efficiency coal-water slurry additive liquid product can ...

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Abstract

The invention is about the addition agent of the straw alkali lignin water coal paste. The process is: (1) put the straw alkali lignin powder into the water and adjusts the pH to 9-10, then adds the aldehyde, hydroxylating for 1-1.5h at 80-90 DEG C to get the intermediate; (2) Dissolve the sulphonating agent in the water and add the ketone, then react for 25-35min at 45-55 DEG C to get the intermediate; (3)mix the above two intermediates and adjust the pH to 5-6h, the temperature is 80-90 DEG C, react for 3-4h, last to cool to get the product. The agent can improve the ability of the dispersion reducing viscidity; it is higher than the lignosulphonate mud, so it can replace the naphthalin water coal paste.

Description

technical field [0001] The invention relates to a wheatgrass alkali lignin high-efficiency coal-water slurry additive and a preparation method thereof. Specifically, the by-product wheat straw alkali lignin recovered from alkaline pulping is used as raw material to prepare high-efficiency coal water slurry additives through hydroxymethylation, sulfomethylation, and graft copolymerization. Branch copolymerization chemical modification technical field. Background technique [0002] Coal water slurry is a new type of fuel that uses physical methods to liquefy coal. It is prepared from coal with a certain particle size (about 60% to 70%), water (about 30% to 40%) and a small amount of additives. The additive disperses the hydrophobic coal particles in water, and maintains low viscosity, good fluidity and stability at high coal powder concentration, making it valuable for industrial application. [0003] Commonly used additives are mainly anionic and n...

Claims

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Application Information

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IPC IPC(8): C10L1/32
Inventor 邱学青周明松杨东杰楼宏铭庞煜霞
Owner SOUTH CHINA UNIV OF TECH
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