Modified silica gel air drying agent and preparation method thereof
A technology of air drying and silica gel, applied in the direction of separation methods, chemical instruments and methods, silicon compounds, etc., can solve the problems of capillary condensation adsorption, solid adsorption, fast drying air desiccant, etc.
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Embodiment 1
[0031] 1. Take 10 grams of silica gel with a drying temperature of 110°C and a drying time of 1 hour in a glass vessel, add 100 ml of 1mol / L aluminum chloride solution and place it in an oscillator at an ambient temperature of 20°C for 4 hours. , and then take out the crude modified silica gel, dry it in an oven for 1 hour, and after cooling to room temperature, take 10 grams of the dried crude modified silica gel and place it in a glass vessel, add 100 milliliters of 2mol / L zinc chloride solution and Shake in an oscillator at an ambient temperature of 20°C for 4 hours, cool to room temperature, then dry in an oven at a drying temperature of 110°C for 1 hour, and cool to room temperature to obtain a modified silica gel air desiccant.
[0032] 2. Take 5 grams of modified silica gel air desiccant and place it in a container with a relative humidity of 100%. After 30 hours of analysis, the water absorption rate of the modified silica gel air desiccant is 92%.
[0033] 3. Take 2 g...
Embodiment 2
[0035]1. Take 5 grams of silica gel with a drying temperature of 110 °C and a drying time of 2 hours in a glass vessel, add 100 ml of 0.1 mol / L aluminum chloride solution and place it in an oscillator at an ambient temperature of 40 °C to shake 3 After 1 hour, the crude modified silica gel was taken out, dried in an oven for 2 hours, after cooling to room temperature, 5 grams of dried crude modified silica gel was placed in a glass vessel, and 100 milliliters of 3mol / L zinc chloride solution was added And placed in an oscillator with an ambient temperature of 30°C for 3 hours, cooled to room temperature, placed in an oven with a drying temperature of 110°C for 2 hours, and cooled to room temperature to obtain a modified silica gel air desiccant.
[0036] 2. Take 10 grams of modified silica gel air desiccant and place it in a container with a relative humidity of 80%. After 35 hours of analysis, the water absorption rate of the modified silica gel air desiccant is 85%.
[0037]...
Embodiment 3
[0039] 1. Take 20 grams of silica gel with a drying temperature of 110°C and a drying time of 2.5 hours in a glass container, add 100 ml of 3mol / L aluminum chloride solution and place it in an oscillator at an ambient temperature of 40°C for 2 hours. , and then take out the crude modified silica gel, dry it in an oven for 4 hours, and after cooling to room temperature, take 20 grams of the dried crude modified silica gel and place it in a glass vessel, add 100 ml of 0.1mol / L zinc chloride solution And place it in an oscillator at an ambient temperature of 70°C for 2 hours, cool to room temperature, place it in an oven with a drying temperature of 110°C for 2.5 hours, and cool to room temperature to obtain a modified silica gel air desiccant.
[0040] 2. Take 8 grams of modified silica gel air desiccant and place it in a container with a relative humidity of 60%. After 40 hours of analysis, the water absorption rate of the modified silica gel air desiccant is 78%.
[0041] 3. T...
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Abstract
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