Loaded organic sulfoacid solid catalyst and preparation method thereof
A solid catalyst, organic sulfonic acid technology, applied in the field of catalysis, can solve problems such as low acidity, achieve the effects of high catalytic efficiency, good solvent stability, and increase acid content
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Embodiment 1
[0036] The supported organic sulfonic acid solid catalyst described in this embodiment is prepared by the following method:
[0037] (1) Impregnation load: Take 30g of macroporous activated carbon and soak it in 120g of 20% nitric acid aqueous solution for activation, and stir and react at 70°C for 2h. The reaction product was washed repeatedly with distilled water until the filtrate was neutral. After suction filtering to remove water, dry at 100°C for 24 hours for later use;
[0038] A 20% styrene solution with a mass fraction of 17ml (15.402g) of styrene and 68ml of dichloromethane was prepared, and 0.077g of azobisisobutyronitrile was added to prepare an impregnation solution. The activated carrier is impregnated in the manner of equal-volume impregnation using a titration operation method.
[0039] (2) Polymerization of styrene: After argon gas was filled into the reaction system from which the organic solvent was removed for 2 min, the reaction was carried out at 80° C...
Embodiment 2
[0044] The supported organic sulfonic acid solid catalyst described in this embodiment is prepared by the following method:
[0045] (1) Immersion loading: 30 g of diatomaceous earth was soaked in 240 g of 40% nitric acid aqueous solution for activation, and stirred and reacted at 90° C. for 2 h. The reaction product was washed repeatedly with distilled water until the filtrate was neutral. After suction filtering to remove water, dry at 100°C for 24 hours for later use;
[0046] 7.8ml of styrene (7.07g) and 11.7ml of acetone solution were used to prepare a 40% styrene solution, and 0.141g of benzoyl peroxide was added to prepare the impregnation solution. The activated carrier is impregnated by equal volume impregnation.
[0047](2) Polymerization of styrene: argon gas was filled into the reaction system from which the acetone solvent was removed for 2 minutes, and then reacted at 50° C. for 30 hours in a closed state, so that the supported styrene was polymerized. The obt...
Embodiment 3
[0052] The supported organic sulfonic acid solid catalyst described in this embodiment is prepared by the following method:
[0053] (1) Impregnation load: Take 30g of activated carbon and place it in 60g of 5% methanesulfonic acid solution for activation, and stir and react at 50°C for 2h. The reaction product was washed repeatedly with distilled water until the filtrate was neutral. After suction filtering to remove water, dry at 100°C for 24 hours for later use;
[0054] 24mL of styrene (21.84g) and 227mL of toluene were used to prepare an impregnation solution with a mass fraction of 10%, and 0.655g of azobisisobutyronitrile was added to prepare the impregnation solution. Take 10 g of the previously activated activated carrier and immerse it in the above impregnation solution, and impregnate the load by soaking in excess solution.
[0055] (2) Styrene polymerization: fill the reaction system with argon protection, stir at 110°C for 6 hours, then filter with suction, and ...
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