Coal water slurry dispersant and its preparation method and use

A technology of coal-water slurry and dispersant, which is applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problems of low concentration of coal-water slurry, poor pulping performance, poor dispersion performance, etc., and achieve low preparation cost , Conducive to industrial production, the effect of less dosage

Active Publication Date: 2015-11-04
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main types of coal water slurry dispersants at home and abroad are: 1) naphthalene sulfonate formaldehyde condensate; 2) copolymerization products of acrylic acid and acrylic monomer; 3) polyolefin series; 4) carboxylic acid and phosphate series ; 5) humic acid and sulfonated humic acid series; 6) lignin sulfonate; at present, the additive used in domestic production of coal water slurry is stabilized by naphthalene dispersant, which has the advantage of good dispersion performance, but its raw material It is more expensive and toxic; phosphoric acid or humic acid is used as a dispersant, although the cost is low, but the dispersion performance is poor, and the concentration of coal water slurry is low, so it still needs to be used in combination with a high-efficiency dispersant; Lignosulfonate substances are also reported as dispersants for pulping, such as Jiang Hongyan. The report on the application of bamboo pulp lignin-based high-efficiency dispersants in coal-water slurry is a lignin-based dispersant, but its pulping performance Still relatively poor, therefore, seeking a kind of preparation cost is low, and the good coal-water slurry dispersant of pulping performance is the technical problem that needs to be solved at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 100g of corncobs were crushed, added with 8g of sulfurous acid, 1.4g of phosphoric acid, and 0.5g of sodium sulfite to hydrolyze at 140°C and 0.5Mpa. After the hydrolysis was completed, the solid and liquid were separated to obtain sugar liquid and xylose residue; Washing at 100°C twice as much, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combined sugar liquid, xylose residue is washed with twice 100°C water, and xylose residue and sugar liquid are obtained after solid-liquid separation.

[0052] Concentrate the obtained sugar solution to a solution with a solid content of 45 wt%, and then settle at 50°C for 48 hours, and add sodium hydroxide at 55°C for neutralization reaction to obtain a solution with a pH value of 5.

[0053] The obtained solution with a pH of 5 is subjected to plate-and-frame filtration twice at a temperature of 50°C. The pre-coating agent for the plate-and-frame filter is diatomaceous earth and waste activated ca...

Embodiment 2

[0059] Grind 100g corncobs, add 6.5g sulfurous acid, 1.5g oxalic acid, 0.55g sodium sulfite to hydrolyze at 160°C and 0.5Mpa, after hydrolysis, separate solid and liquid to obtain sugar liquid and xylose residue; combine sugar liquid and xylose residue Add four times of 100°C water for washing, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combine the sugar liquid, add twice the 100°C water for washing the xylose residue, and obtain xylose residue and sugar liquid after solid-liquid separation.

[0060] Concentrate the obtained sugar solution to a solution with a solid content of 45 wt%, and then settle at 50°C for 48 hours, and add sodium hydroxide at 55°C for neutralization reaction to obtain a solution with a pH value of 5.

[0061] The obtained solution with a pH of 5 is subjected to plate-and-frame filtration twice at a temperature of 50°C. The pre-coating agent for the plate-and-frame filter is diatomaceous earth and waste activated carb...

Embodiment 3

[0067] 300g of corncobs were crushed, added 10g of sulfurous acid, 5g of sulfuric acid, and 1.3g of sodium sulfite to hydrolyze at 150°C and 0.6Mpa. After the hydrolysis was completed, the solid and liquid were separated to obtain sugar liquid and xylose residue; Washing at 100°C twice as much, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combined sugar liquid, xylose residue is washed with twice 100°C water, and xylose residue and sugar liquid are obtained after solid-liquid separation.

[0068] The obtained sugar solution was concentrated to a solution with a solid content of 45 wt%, and then settled at 50°C for 48 hours, and sodium hydroxide was added at 55°C for neutralization reaction to obtain a solution with a pH value of 4.

[0069] The obtained solution with a pH of 5 is subjected to plate-and-frame filtration twice at a temperature of 50°C. The pre-coating agent for the plate-and-frame filter is diatomaceous earth and waste activate...

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PUM

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Abstract

The invention provides a coal water slurry dispersant and its preparation method and use. The coal water slurry dispersant is prepared by mixing reaction of aldehyde and lignosulfonate prepared from liquid glucose, wherein in the reaction, reaction pH is controlled in a range of 9-11 and the aldehyde comprises one or more of formaldehyde, acetaldehyde and propionaldehyde. The coal water slurry dispersant is used in coal water slurry so that the coal water slurry has high slurry concentration, has a small use amount, a low preparation cost and a wide raw material sources, and is conducive to industrial production.

Description

technical field [0001] The invention relates to a coal water slurry dispersant and its preparation method and application. Background technique [0002] Coal water slurry is a new type of clean coal-based liquid fuel. It is a liquefied new fuel made of 60-70wt% coal with a certain particle size, 30-40wt% water and a small amount of additives. It not only maintains the original coal Physical and chemical properties, but also have good rheology, thixotropy and stability like petroleum, can be pumped, atomized and burned, and improve the efficiency of combustion; in the current situation of energy shortage and increasing environmental pollution, coal water slurry has received more and more attention. [0003] Dispersant is the key factor affecting the performance of coal water slurry, because coal water slurry is a thermodynamically unstable system, low viscosity, high concentration, good fluidity and stability are the most important properties of coal water slurry, coal is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C08H7/00
Inventor 唐一林江成真张茜高绍丰张静李国辉
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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