Rare earth catalyst and preparation method thereof, rare earth catalyst composition comprising same, and application
A technology of rare earth catalyst and composition, which is applied in the field of rare earth catalyst composition, rare earth catalyst and its preparation, which can solve the problems of unsatisfactory polymer stereoregularity and high cost of cocatalyst, and achieve high tacticity and high catalytic activity.
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[0053] The present invention also provides a method for preparing the above rare earth catalyst, comprising: making the compound of formula II and the compound LnZ 1 Z 2 Z 3 An acid-base reaction occurs in an organic solvent to obtain a rare earth catalyst of formula VI;
[0054]
[0055] Wherein, Ln is a transition metal element of Group IIIB;
[0056] Z 1 ,Z 2 same or different, independently a substituent of Ln, Z 3 with Z 1 ,Z 2 The same or different, is a substituent;
[0057] D is a neutral ligand that coordinates with Ln, and n is an integer greater than or equal to 0;
[0058] R 1 , R 2 , R 3 , R 4 The same or different, independently selected from hydrogen, C1-C10 alkyl, C6-C30 aryl.
[0059] In the above reaction formula, the meanings of each symbol are the same as above, and will not be repeated here. Among them, Z 1 ,Z 2 and Z 3 same or different, in one embodiment, Z 1 ,Z 2 and Z 3 It can be independently an alkyl substituent containing a he...
Embodiment 1
[0076] Preparation of main catalyst 1
[0077]
[0078] At room temperature, the toluene solution of NNN ligand (1.00 g, Fw=503.24, 2 mmol) was slowly added to the toluene solution of Y tribenzyl compound (0.98 g, Fw=491.20, 2 mmol), and the reaction was continued for 24 hours at room temperature. Dry toluene solvent, add 20 mL of hexane solvent for washing, the obtained light yellow powder solid is rare earth metal complex 1 (main catalyst 1), yield 1.43 g, yield 83%, characterized by NMR.
[0079] NMR data: 1 H-NMR (600MHz, C6D6): 1.87 (s, 4H, Y-CH 2 ), 2.37(s, 12H, N-Me), 2.56(s, 6H, N-Me), 6.53(m, 2H, Ar-H), 6.61(m, 2H, Ar-H), 6.73(m, 2H, Ar-H), 6.85 (m, 4H, Ar-H), 7.01 (m, 4H, Ar-H), 7.07 (m, 2H, Ar-H), 7.30 (m, 5H, Ar-H) , 8.31(s, 1H, N=CH).
Embodiment 2-6
[0081] The synthesis of the complex shown in Example 2-6 refers to the synthesis of the main catalyst 1, and the rare earth central metal in the raw material is replaced by La, Pr, Nd, Sm, Gd respectively, the experimental steps are the same, and the obtained products are respectively pale yellow ( La), dark green (Pr), purple (Nd), brown-black (Sm), and pale yellow (Gd) powder solids in 70-85% yield; due to +3-valent La, Pr, Nd, Sm, Gd The paramagnetic characteristics of the compound cannot be characterized by NMR.
[0082]
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