Spherical double mesoporous attapulgite composite carrier and its preparation method and application
The technology of attapulgite and composite carrier is applied to spherical double mesoporous attapulgite composite carrier, and the application field of spherical double mesoporous attapulgite composite carrier in preparing supported polyolefin catalyst can solve the problem of large water consumption, Pollution of the environment, low load rate, etc.
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[0051] According to the present invention, the preparation method of the supported polyolefin catalyst can be a conventional method for preparing a supported polyolefin catalyst in the art, and the specific process can include: in the presence of an inert gas, the spherical double mesoporous concave-convex provided by the present invention The rod stone composite carrier is impregnated in the catalyst mother liquor containing magnesium salt and / or titanium salt, and then filtered and dried in sequence.
[0052] According to the present invention, the method for carrying out olefin polymerization using the supported polyolefin catalyst can be a conventional olefin polymerization method in the art, and the specific process can include: under the polymerization reaction conditions, in the presence of the supported polyolefin catalyst provided by the present invention Next, the olefin monomer is polymerized.
[0053] According to the present invention, the reaction conditions of t...
Embodiment 1
[0070] (1) Preparation of spherical double mesoporous attapulgite composite carrier
[0071] At 80°C, cetyltrimethylammonium bromide and tetraethyl orthosilicate are added to a 25% by weight ammonia solution, and then deionized water is added, wherein the amount of tetraethyl orthosilicate is 1g, ethyl tetrasilicate, hexadecyltrimethylammonium bromide, ammonia in ammonia water and water in a molar ratio of 1:0.37:2.8:142, and stirred at 80°C for 4 hours to obtain two Mesoporous molecular sieve material A1 with three-dimensional hexagonal channel distribution.
[0072] Concentration is that the water glass of 15% by weight and the sulfuric acid solution of 12% by weight are mixed with a weight ratio of 5:1 and contacted for 1.5h at 30° C., and then adjusted to pH with 98% by weight of sulfuric acid. 3. Obtain the reaction product silica gel B1.
[0073] Stir and mix 10g of mesoporous material A1, 10g of silica gel B1 and 10g of attapulgite prepared above, pass the mixed mater...
Embodiment 2
[0088] (1) Preparation of spherical double mesoporous attapulgite composite carrier
[0089] At 50°C, cetyltrimethylammonium bromide and tetraethyl orthosilicate are added to the ammonia solution with a concentration of 25% by weight, and then deionized water is added, wherein the amount of tetraethyl orthosilicate is 1g, ethyl tetrasilicate, hexadecyltrimethylammonium bromide, ammonia in ammonia water and water in a molar ratio of 1:0.5:1.5:180, and stirred at 50°C for 7 hours to obtain two Mesoporous molecular sieve material A2 with hexagonal channel distribution.
[0090] The water glass with a concentration of 15% by weight and the sulfuric acid solution with a concentration of 12% by weight are mixed in a weight ratio of 4:1 and contacted for 2 hours at 40° C., and then the pH value is adjusted to 2 with a concentration of 98% by weight sulfuric acid. , to obtain the reaction product silica gel B2.
[0091] Stir and mix 20g of mesoporous material A2, 10g of silica gel B...
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