Catalyst for olefine polymerizing reaction and its components

A technology for olefin polymerization and catalyst, which is applied in the field of catalyst components and catalysts for olefin polymerization, and can solve the problems of low catalytic activity of catalysts, unfavorable polymer development, and narrow polymer molecular weight distribution.

Active Publication Date: 2003-11-05

CHINA PETROLEUM & CHEM CORP +1

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AI-Extracted Technical Summary

Problems solved by technology

[0005] However, the catalysts for olefin polymerization prepared using the above-mentioned dibasic aromatic carboxylate compounds, 1,3-diether compounds containing two ether groups and dibasic aliphatic carboxylate compounds There are certain defects in practical application, for example, the catalytic activity of the catalyst using binary aromatic carboxylate compounds is low, and the molecular weight distribution of the obtained polymer is also ...

Abstract

The present invention provides one kind catalyst component for CH2=CHR olifine polymerization, where R is H or alkyl radical or aryl radical of C1-C6. The catalyst component contains Mg, Ti, halogenand electron donor.

Technology Topic

Electron donorAryl radical +5

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Examples

Experimental program(46)
Comparison scheme(1)

Example Embodiment

[0040] The compound sample is placed in an extractor and extracted with boiling heptane for 6 hours, and the residue is dried to a constant weight. The ratio of the obtained polymer weight (g) to 2 is isotacticity. 5. Determination of infrared spectrum: adopt MAGNA-IR 760 infrared spectrometer of NICOLET company, conventional analysis method. 6. Determination of Polymer Melt Index: According to ASTM D1238-99 Determination of Synthesis Example 12, Synthesis of 4-Pentanediol Dibenzoate

[0041] (1) Preparation of 2,4-pentanediol

[0042]A mixture of 10g of 2,4-pentanedione and 30ml of methanol was added dropwise to a mixed solution of 2.5g of sodium borohydride, 0.1g of sodium hydroxide and 25ml of water at 0-10°C. After the addition, the solvent was removed under reduced pressure and extracted continuously with 40ml of ethyl acetate for 15h. The solvent was removed and column chromatography was performed to obtain 9.4 g of colorless liquid 2,4-pentanediol with a yield of 90%. IR spectrum at 3400cm -1 There is a strong absorption peak at 1700cm -1 There are no absorption peaks on the left and right, which proves that the reduction reaction is complete.

[0043] (2) Preparation of 2,4-pentanediol dibenzoate

[0044] Add 30ml tetrahydrofuran and 7.1g (0.09mol) pyridine to 2,4-pentanediol (3.1g, 0.03mol), add 10.5g (0.075mol) benzoyl chloride under stirring, and heat to reflux for 4h. After cooling, add 20ml of saturated brine, extract with ethyl acetate, anhydrous Na 2 SO 4 Dry and remove solvent. Column chromatography gave 8.9 g of 2,4-pentanediol dibenzoate as a colorless liquid, with a yield of 95%.

Example Embodiment

[0045] 1 H NMR (TMS, CDCl 3 , ppm): δ1.3~1.4 (8H, m, methyl H), 2.0~2.1 (2H, m, methylene H), 5.2~5.3 (2H, m, methine H of ester group), 7.3~8.0 (10H, m, benzene ring H) Example 2 Synthesis of (2S, 4S)-(+)-2,4-pentanediol dibenzoate

[0046] (2S,4S)-(+)-2,4-Pentanediol 3.1g, 30ml tetrahydrofuran and 0.09mol pyridine were added to 0.03mol, 0.075mol benzoyl chloride was added under stirring, and heated to reflux for 4 hours. After cooling, add 20ml of saturated brine, extract with ethyl acetate, anhydrous Na 2 SO 4 Dry and remove solvent. Column chromatography gave 8.9 g of (2S,4S)-(+)-2,4-pentanediol dibenzoate as a colorless liquid, with a yield of 95%.

[0047] 1 H NMR (TMS, CDCl 3 , ppm): δ1.2~1.4 (8H, m, methyl H), 2.0~2.1 (2H, m, methylene H), 5.2~5.3 (2H, m, methine H of ester group), δ7.3~8.0 (10H, m, benzene ring H). Embodiment 3 (2R, 4R)-(+)-2, the synthesis of 4-pentanediol dibenzoate

Example Embodiment

3-Butyl-2,4-pentanediol bis(p-methylbenzene

[0048] The method is the same as that of Preparation Example 2, except that (2R,4R)-(+)-2,4-pentanediol is used instead of (2S,4S)-(+)-2,4-pentanediol. 1 HNMR (TMS, CDCl 3 , ppm): δ1.3~1.4 (8H, m, methyl H), 2.0~2.1 (2H, m, methylene H), 5.2~5.3 (2H, m, methine H of ester group), 7.3-8.0 (10H, m, benzene ring H). Embodiment 42, the preparation of 4-pentanediol two (m-chlorobenzoic acid) esters

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