Superabsorbent resin for green roof and preparation method thereof
A super absorbent resin, roof greening technology, applied in the field of functional polymer material synthesis, can solve problems such as difficulty, insufficient water supply, volatile moisture maintenance, etc.
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Embodiment 1
[0051] The preparation method of solid acid catalyst: first ZrOCl 2 ·8H 2 Dissolve O in distilled water, slowly add concentrated ammonia water with a concentration of 10mol / L under stirring, adjust the pH value to 9, and form a gel, then age at room temperature until the upper layer solution is clear, filter with suction, and wash until there is no Cl - was detected, and Zr(OH) was obtained 4 , followed by Zr(OH) 4 Dry in an oven at 105°C for 20 hours, grind into a fine powder, pass through a 120-mesh sieve to obtain a solid powder, and then use dilute H with a concentration of 1.0mol / L 2 SO 4 After impregnation, filter with suction, dry the filter cake in an oven at 100°C for 20 hours, and finally roast it at 650°C for 1 hour, grind it into fine powder, and pass it through a 200-mesh sieve to obtain a solid acid catalyst.
Embodiment 2
[0053] The preparation method of solid acid catalyst: first ZrOCl 2 ·8H 2 Dissolve O in distilled water, slowly add concentrated ammonia water with a concentration of 12 mol / L under stirring, adjust the pH value to 9.5, and form a gel, then age at room temperature until the upper layer solution is clear, filter with suction, and wash until there is no Cl - was detected, and Zr(OH) was obtained 4 , followed by Zr(OH) 4 Dry in an oven at 108°C for 22 hours, grind into a fine powder, pass through a 135-mesh sieve to obtain a solid powder, and then use dilute H with a concentration of 1.2mol / L 2 SO 4 After impregnation, filter with suction, dry the filter cake in an oven at 102°C for 22 hours, and finally roast it at 675°C for 2 hours, grind it into fine powder, and pass it through a 225-mesh sieve to obtain a solid acid catalyst.
Embodiment 3
[0055] The preparation method of solid acid catalyst: first ZrOCl 2 ·8H 2 Dissolve O in distilled water, slowly add concentrated ammonia water with a concentration of 13mol / L under stirring, adjust the pH value to 10, and form a gel, then age at room temperature until the upper layer solution is clear, filter with suction, and wash until there is no Cl - was detected, and Zr(OH) was obtained 4 , followed by Zr(OH) 4 Dry in an oven at 110°C for 24 hours, grind into a fine powder, pass through a 150-mesh sieve to obtain a solid powder, and then use dilute H with a concentration of 1.5mol / L 2 SO 4 After impregnation, filter with suction, dry the filter cake in an oven at 105°C for 24 hours, and finally roast it at 700°C for 3 hours, grind it into fine powder, and pass through a 250-mesh sieve to obtain a solid acid catalyst.
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Abstract
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