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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[0023] Example 1
[0024] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6 g of cyanuric chloride and 40.0 g of chloroform into the reaction flask, and stir for 10 min under an ice water bath. Add the above dehydroabietylamine solution dropwise with a dropping funnel and complete the addition within 30 minutes. Then, the pH value of the system is maintained at 5 with a sodium hydroxide solution with a mass concentration of 10%, and the reaction is kept in an ice-water bath until the pH value does not change. Intermediate product I is obtained.
[0025] 2) Add 10.0 g of polyethylene glycol-400 and 40.0 g of chloroform into another reaction flask and 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 addition was completed in 4 hours. Then, the pH value of the system is maintained at a pH value of 6 with a sodium hydroxide solution with a mass ...
Example Embodiment
[0032] Example 2
[0033] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6 g of cyanuric chloride and 40.0 g of chloroform into the reaction flask, and stir for 10 min under an ice water bath. Add the above dehydroabietylamine solution dropwise with a dropping funnel, and complete the addition within 30 minutes. Then, the pH value of the system is maintained at a pH of 6 with a potassium hydroxide solution with a mass concentration of 10%, and the temperature is kept in an ice-water bath until the pH value does not change. Intermediate product I is obtained.
[0034] 2) Add 15.0 g of polyethylene glycol-600 and 40.0 g of chloroform into another reaction flask and 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 addition was completed in 4 hours. Then, the pH of the system is maintained at a pH of 6 with a potassium hydroxide solution with a...
Example Embodiment
[0041] Example 3
[0042] 1) Dissolve 7.1 g of dehydroabietylamine in 50.0 g of chloroform to make a solution. Add 4.6 g of cyanuric chloride and 40.0 g of chloroform into the reaction flask, and stir for 10 min under an ice water bath. Add the above dehydroabietylamine solution dropwise with a dropping funnel and complete the addition within 30 minutes. Then, the pH value of the system is maintained at 5 with a sodium hydroxide solution with a mass concentration of 10%, and the reaction is kept in an ice-water bath until the pH value does not change. Intermediate product I is obtained.
[0043] 2) Add 29.9 g of polyethylene glycol-1200 and 40.0 g of chloroform into another reaction flask and 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 addition was completed in 4 hours. Then, the pH value of the system is maintained at a pH of 7 with a sodium hydroxide solution with a mass conce...
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