Rosin-based anionic coal water slurry dispersing agent and preparation method thereof
An anionic, coal-water slurry technology, applied in the field of coal-water slurry dispersant, can solve the problems of high pulp viscosity, difficult handling and high price, and achieve the effects of good dispersibility and stability and large adsorption capacity
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Embodiment 1
[0024] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6g of cyanuric chloride and 40.0g of chloroform into the reaction flask, and stir for 10min under ice-water bath. Add the above-mentioned dehydroabietylamine solution dropwise with a dropping funnel, and finish adding within 30 minutes. Then use 10% sodium hydroxide solution to keep the pH value of the system at 5, keep the reaction in an ice-water bath until the pH value remains unchanged, and obtain the intermediate product I.
[0025] 2) Add 10.0 g polyethylene glycol-400 and 40.0 g chloroform into another reaction flask, stir to dissolve. The temperature was raised to 35°C, and all the intermediate product I was slowly added dropwise to the reaction flask, and the dropwise addition was completed within 4 hours. Then use 10% sodium hydroxide solution to keep the pH value of the system at 6, keep the reaction until the pH value remains unchanged, and obtain the intermediate pr...
Embodiment 2
[0033] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6g of cyanuric chloride and 40.0g of chloroform into the reaction flask, and stir for 10min under ice-water bath. Add the above-mentioned dehydroabietylamine solution dropwise with a dropping funnel, and finish adding within 30 minutes. Then, the pH value of the system was maintained at 6 with a potassium hydroxide solution having a mass concentration of 10%, and the reaction was carried out in an ice-water bath until the pH value remained unchanged to obtain an intermediate product I.
[0034] 2) Add 15.0g polyethylene glycol-600 and 40.0g chloroform into another reaction flask, stir to dissolve. The temperature was raised to 40°C, and all the intermediate product I was slowly added dropwise to the reaction flask, and the dropwise addition was completed within 4 hours. Then use potassium hydroxide solution with a mass concentration of 10% to keep the pH value of the system at 6...
Embodiment 3
[0042] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6g of cyanuric chloride and 40.0g of chloroform into the reaction flask, and stir for 10min under ice-water bath. Add the above-mentioned dehydroabietylamine solution dropwise with a dropping funnel, and finish adding within 30 minutes. Then use 10% sodium hydroxide solution to keep the pH value of the system at 5, keep the reaction in an ice-water bath until the pH value remains unchanged, and obtain the intermediate product I.
[0043] 2) Add 29.9g polyethylene glycol-1200 and 40.0g chloroform into another reaction flask, stir to dissolve. The temperature was raised to 40°C, and all the intermediate product I was slowly added dropwise to the reaction flask, and the dropwise addition was completed within 4 hours. Then use 10% sodium hydroxide solution to keep the pH value of the system at 7, keep the reaction until the pH value remains unchanged, and obtain the intermediate pro...
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Abstract
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