Method for preparing activated carbon with high adsorption performance by using pulping black liquor
A technology for pulping black liquor and activated carbon, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of not achieving high-efficiency adsorption, achieve excellent electrochemical performance, reduce waste, and save the effect of separation process
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Embodiment 1
[0027] A kind of method utilizing pulping black liquor to prepare high adsorption performance activated carbon, comprises the following steps:
[0028] (1) Selection of raw materials: pulping black liquor produced during the pulping process with Acacia Mazhan and Acacia Heijing as raw materials (refer to the pulping and cooking waste liquor obtained by the method of Example 1 of CN201910932209.4); black liquor components (g / L): lignin 43.29~44.01g / L, hemicellulose 23.47~24.24g / L, ash content 40.18~41.20g / L, solid content 140.88~160.39g / L, pH value 12.79~12.83;
[0029] (2) Raw material pretreatment: pulping black liquor was sealed and heated at 240°C for 5 hours, then cooled naturally to room temperature, filtered (filter membrane pore size 10 μm), to obtain the filtrate and solid product A; the filtrate was adjusted to pH 5.1 with sulfuric acid, and the The mass ratio of cystine to cystine is 1:0.06. Add cystine, stir at 80°C for 2 hours, filter (filter membrane pore size 2 ...
Embodiment 2
[0035] A kind of method utilizing pulping black liquor to prepare high adsorption performance activated carbon, comprises the following steps:
[0036] (1) Selection of raw materials: pulping black liquor produced during the pulping process with Acacia Mazhan and Acacia Heijing as raw materials (refer to the pulping and cooking waste liquor obtained by the method of Example 1 of CN201910932209.4); black liquor components (g / L): lignin 43.29~44.01g / L, hemicellulose 23.47~24.24g / L, ash content 40.18~41.20g / L, solid content 140.88~160.39g / L, pH value 12.79~12.83;
[0037](2) Raw material pretreatment: pulping black liquor was sealed and heated at 221°C for 6 hours, then cooled naturally to room temperature, filtered (filter membrane pore size 10 μm), to obtain the filtrate and solid product A; the filtrate was adjusted to pH 5.1 with sulfuric acid, and the The mass ratio of cystine to cystine is 1:0.06. Add cystine, stir at 60°C for 2 hours, filter (filter membrane pore size 2 μ...
Embodiment 3
[0043] A kind of method utilizing pulping black liquor to prepare high adsorption performance activated carbon, comprises the following steps:
[0044] (1) Selection of raw materials: pulping black liquor produced during the pulping process with Acacia Mazhan and Acacia Heijing as raw materials (refer to the pulping and cooking waste liquor obtained by the method of Example 1 of CN201910932209.4); black liquor components (g / L): lignin 43.29~44.01g / L, hemicellulose 23.47~24.24g / L, ash content 40.18~41.20g / L, solid content 140.88~160.39g / L, pH value 12.79~12.83;
[0045] (2) Raw material pretreatment: pulping black liquor was sealed and heated at 240°C for 5 hours, then cooled naturally to room temperature, filtered (filter membrane pore size 10 μm), to obtain the filtrate and solid product A; the filtrate was adjusted to pH 4.0 with sulfuric acid, and the filtrate The mass ratio of cystine to cystine is 1:0.03, add cystine, stir at 80°C for 2 hours, filter (filter membrane por...
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