Rare earth catalysis system, preparation method of rare earth catalysis system and preparation method of poly(1,3-pentadiene)
A technology of polypiperylene and rare earth catalysis, applied in the field of polymers, can solve the problems of unfavorable rare earth catalysts widely used, demanding technical parameters, complicated preparation process, etc., and achieve low requirements for reaction conditions, simple operation, and high preparation process The effect of simple process
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[0064] The invention provides a preparation method of a rare earth catalytic system, comprising the following steps:
[0065] mixing the rare earth oxide complex and the alkylaluminum compound, and aging the obtained mixed system to obtain a rare earth catalytic system;
[0066] The rare earth oxide complex has a chemical composition represented by formula (I):
[0067] ln 2 o 3 xR yL(I);
[0068] Wherein, Ln is a rare earth element;
[0069] R is an acidic compound;
[0070] L is an electron-donating ligand compound;
[0071] 0
[0072] In the present invention, preferably, the rare earth oxide complex and the alkylaluminum compound are sequentially added into a reaction vessel for mixing, and then the obtained mixed system is subjected to aging treatment to obtain a rare earth catalytic system. In the present invention, the mixed system preferably further includes an organic solvent. In the present invention, the rare earth oxide complex, the alkylaluminum...
Embodiment 1
[0087] will Nd 2 o 3 and HCF 3 SO 3 According to the molar ratio of 1:3, it was added into the grinder and ground for 30 hours to obtain the rare earth oxide complex.
[0088] The present invention tests the rare earth oxide complexes obtained in Example 1, and the test results are shown in Table 1. Table 1 shows the chemical compositions of the rare earth oxide complexes obtained in Examples 1 to 13 of the present invention.
[0089] Under the protection of nitrogen, add 0.6×10 -4 mol of the rare earth oxide complex prepared above, 2.0mol / L of AlEt 3 Hexane solution 1.8mL, then add the hexane of 1.2mL in the mixed solution that obtains, the molar concentration that obtains rare earth element is 4 * 10 -5 mol / mL solution, the resulting solution was aged at 60°C for 8 hours to obtain a rare earth catalyst system.
Embodiment 2
[0091] La 2 o 3 , HCOOH and (CH 3 ) 2 CHOH was added into the grinder at a molar ratio of 1:4:3, and ground for 60 hours to obtain the rare earth oxide complex.
[0092] The present invention tests the rare earth oxide complex obtained in Example 2, and the test results are shown in Table 1.
[0093] Under the protection of nitrogen, add 0.75×10 -4 mol of the above-mentioned prepared rare earth oxide complex, 2.0mol / L of Al(i-Bu) 3 Hexane solution 1.5mL, then add the hexane of 1.5mL in the mixed solution that obtains, the molar concentration that obtains rare earth element is 5 * 10 -5 mol / mL solution, the resulting solution was aged at 20°C for 24 hours to obtain a rare earth catalyst system.
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