Coal gasification crude slag based complex flocculants by two-step acid leaching process: synthesis, flocculation and mechanisms.

36 However, when the temperature was raised to 50 °C, the acid leaching efficiency of HCl and HAc solution was reduced to 68.73% and 29.83%, and at the temperature of 60 °C, the leaching efficiency of HCl and HAc solution was similar to that at 50 °C and also had a weak trend of decline.

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