Solid catalyst of bonded type organic sulfonic acid and its preparation method
A solid catalyst and organic sulfonic acid technology, applied in the field of catalysis, can solve the problem of low acidity, achieve high catalytic efficiency, good solvent resistance and high temperature resistance, and increase the effect of acid content
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Embodiment 1
[0055] The structural formula of the bonded organic sulfonic acid solid catalyst described in the present embodiment is:
[0056]
[0057] Described catalyst is prepared by following method:
[0058] (1) Carrier modification: take 30g of silica gel and place it in 150g of methanesulfonic acid aqueous solution with a mass fraction of 15% for soaking and activation, stir at reflux temperature for 4h, separate the reaction product and wash repeatedly with distilled water until the filtrate is neutral; remove the water by suction filtration Finally, after vacuum drying at 100°C for 24 hours, it is ready for use;
[0059] Take 10 g of activated silica gel and add it to 40 mL of 50% ethanol solution, add 10 mL of γ-(methacryloyloxy)propyltrimethoxysilane (CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 ), react at a constant temperature at 50°C for 24h, and extract the product after suction filtration with 50% ethanol for 2h, and dry it in vacuum for 24h to obtain the required modi...
Embodiment 2
[0072] The structural formula of the bonded organic sulfonic acid solid catalyst described in the present embodiment is:
[0073]
[0074] Described catalyst is prepared by following method:
[0075] (1) Carrier modification: take 30g of diatomite and place it in 240g of methanesulfonic acid aqueous solution with a mass fraction of 5% for soaking and activation, stir at reflux temperature for 4h, separate the reaction product and wash repeatedly with distilled water until the filtrate is neutral; suction filtration After removing moisture, vacuum dry at 100°C for 24 hours, and set aside;
[0076] Take 10g of activated silica gel and add it to 120mL of 50% methanol solution, add 50mL of γ-(methacryloyloxy)propyltrimethoxysilane (CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 ), react at a constant temperature at 150°C for 24h, and extract the product after suction filtration with 50% methanol for 2h, and dry it in vacuum for 24h to obtain the required modified silica gel. The...
Embodiment 3
[0083] The structural formula of the bonded organic sulfonic acid solid catalyst described in the present embodiment is:
[0084]
[0085] Described catalyst is prepared by following method:
[0086] (1) Carrier modification: take 30g of diatomaceous earth and place it in 60g of dilute nitric acid solution with a mass fraction of 15% for soaking and activation, stir at reflux temperature for 4h, separate the reaction product and wash repeatedly with distilled water until the filtrate is neutral; remove by suction After moisture, vacuum dry at 100°C for 24 hours, and set aside;
[0087] Take 10g of activated silica gel and add it to 160mL of 50% acetone solution, add 5mL of vinyltriethoxysilane (CH 2 =CHSi(OC 2 h 5 ) 3 ), react at a constant temperature at 100°C for 24h, and extract the product after suction filtration with 50% acetone for 2h, and dry it in vacuum for 24h to obtain the required modified silica gel. The structural formula is as follows:
[0088]
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Abstract
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