Coal water slurry dispersant and its preparation method and application
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, poor pulping performance, and poor dispersion performance of coal-water slurry, and achieve low preparation cost , Conducive to industrial production, the effect of less dosage
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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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