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Solid catalyst component and catalyst for olefin polymerization and application thereof
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A solid catalyst, olefin polymerization technology, applied in the field of solid catalyst components, can solve the problem of narrow molecular weight distribution of polymers
Pending Publication Date: 2021-05-07
CHINA PETROLEUM & CHEM CORP +1
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However, when the aromatic dicarboxylic acid ester compound is used as the internal electron donor of the olefin polymerization catalyst, there is a defect that the molecular weight distribution of the obtained polymer is narrow.
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[0024] According to some embodiments of the present invention, the substituent is selected from halogen, hydroxyl, amino, C 6 -C 20 Aryl, C 7 -C 20 Aralkyl, C 7 -C 20 Alkaryl, C 1 -C 10 Alkyl and C 1 -C 20 Alkoxy, preferably selected from halogen, hydroxy, amino, phenyl, naphthyl, benzyl, phenethyl, C 1 -C 6 Alkyl-substituted phenyl, C 1 -C 10 Alkyl and C 1 -C 20 Alkoxy, more preferably selected from fluorine, chlorine, bromine, iodine, hydroxyl, amino, phenyl, naphthyl, benzyl, phenethyl, methyl, ethyl, isopropyl, n-propyl, n-butyl base, isobutyl, tert-butyl, n-pentyl, isopentyl, n-hexyl, methoxy, ethoxy, isopropoxy, n-propoxy, n-butoxy, isobutoxy, tert One or more of butoxy, n-pentyloxy, isopentyloxy, and n-hexyloxy.
[0025] According to some embodiments of the present invention, R 1 and R 2 each independently selected from hydrogen, C with or without substituents 1 -C 20 Alkyl, C with or without substituents 2 -C 20 Alkenyl, C with or without substitue...
Embodiment
[0091] The following examples are given in order to illustrate the present invention, but not to limit the present invention.
[0092] (1) Synthesis of compounds
[0093] Synthesis of (4-phenylimino-2-pentyl ester) (N-1) benzoic acid
[0094]
[0095] In a 250 ml three-necked flask, 3.26 g of 4-phenylimino-2-pentanol, 100 ml of THF and 2.15 ml of triethylamine were added after purging with nitrogen, and 2.80 g of benzoyl chloride was added dropwise at room temperature, Stir well. Stir the reaction for 4 hours, then raise the temperature and reflux for 8 hours. After concentrating under reduced pressure, recrystallize from a mixed solution of diethyl ether / petroleumether (1:50) to obtain pale yellow crystals, and dry in vacuo to obtain 3.37 g of the product (60% yield). 1 H-NMR (δ, ppm, TMS, CDCl 3 ):8.01~7.99(2H,m,ArH),7.78~7.75(2H,m,ArH),7.46~7.44(2H,m,ArH),7.36~7.34(2H,m,ArH),7.35~7.32( 3H,m,ArH),7.26~7.24(2H,m,ArH),4.15~4.13(1H,t,OCH),1.95~1.93(1H,m,CH 2 ),1.58~1....
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Abstract
The invention discloses a catalyst component and a catalyst for olefin polymerization and application thereof. The catalyst component for olefin polymerization comprises magnesium, titanium, halogen and an internal electron donor, wherein the internal electron donor comprises an imino ester compound as shown in a formula I and an aromatic carboxylic ester compound as shown in a formula II. By using the compound internal electron donor compound disclosed by the invention, a catalyst with excellent comprehensive performance can be obtained, and development of polypropylene grades is facilitated.
Description
technical field [0001] The present invention relates to a solid catalyst component for olefin polymerization, the catalyst and its application. Background technique [0002] For traditional Ziegler-Natta catalysts, with the development of electron donor compounds in the catalyst, polyolefin catalysts are constantly updated, and the process technology of polypropylene is also improved. Catalyst research and development from the first / second generation TiCl 3 Alkyl aluminum system to the third generation of magnesiumchloride as a carrier, TiCl 4 As the active center, add monoester or aromatic dibasic acid ester as the internal electron donor and silane as the external electron donor of TiCl 4 · ED · MgCl 2 / AlR 3 · In ED system, the catalytic olefin polymerization activity of the catalyst and the high isotacticity of the obtained polypropylene have been greatly improved. In the prior art, most catalyst systems for propylene polymerization use magnesium, titanium, halogen...
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