Preparation method of alkoxy magnesium carrier for olefin polymerization catalyst

A technology for alkoxymagnesium carrier and olefin polymerization, which is applied in the preparation of metal alcohols, organic chemistry, and magnesium organic compounds. The effect of tight structure and easy control of response

Active Publication Date: 2016-06-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Method 2 stipulates that the ratio of magnesium to ethanol should be controlled within the range of 1 / 9 to 1 / 15, but research has found that if the addition ratio is fixed at 1 / 9, the viscosity of the reaction system will rise sharply in the second half of the reaction. When the reaction rate exceeds 80%, if the stirring is not carried out sufficiently, the particles will agglomerate, and the experiment cannot finally obtain uniform round particles; if the stirring is forced, the shape of the particles will be destroyed (JP8073388)
If the initial addition ratio is fixed at 1 / 15, so that the reaction occurs under the condition of a large amount of ethanol, in the final stage of the reaction, when the viscosity rises, although the stirring can proceed smoothly, the shape of the obtained particles will not be round enough. Moreover, the bulk density is also very low, and particles that meet the conditions cannot be obtained.
Among the various methods of three to five, the operation is very complicated, and other raw materials are required in addition to Mg and ROH, so it cannot be used as a satisfactory manufacturing method

Method used

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  • Preparation method of alkoxy magnesium carrier for olefin polymerization catalyst
  • Preparation method of alkoxy magnesium carrier for olefin polymerization catalyst
  • Preparation method of alkoxy magnesium carrier for olefin polymerization catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0059] 1) In a reactor with a stirrer, a reflux condenser, a thermometer and a burette are installed. The top of the reflux condensing pipe is connected to the conduit, and the other end of the conduit is connected to the oil seal device, which is convenient for observing the H 2 generation. After fully replaced with nitrogen, add 0.2g of magnesium powder, 10ml of decane and 0.2ml of iodine in absolute ethanol (0.0266g / ml) to the reactor, activate the reaction for 15min, and then add 10ml of absolute ethanol. Start to heat up until reaching the reaction temperature of the reaction system, each time the reaction system no longer discharges H 2 Add the dehydrated ethanol solution (0.0266g / ml) and decane of the same magnesium powder, alcohol, iodine as the previous charging amount, add altogether 5 times, add the last raw material and the reaction does not produce H 2 After that, the aging reaction was continued for 2h.

[0060] 2) After the aging reaction, 1.418g of pentaeryt...

Embodiment 2

[0063] Carry out the same method as Example 1, the difference is to add 1.418g pentaerythritol (n pentaerythritol: n metal magnesium=0.25) in the reaction system, react at 80 ℃ for 5 hours, after the end of the final reaction, the product is washed and separated and drying to obtain a white solid powder with good fluidity.

[0064] The obtained product was characterized using the same method as in Example 1. The results are shown in Table 1.

Embodiment 3

[0066] Carry out the same method as Example 1, the difference is to add 1.418g pentaerythritol (n pentaerythritol: n metal magnesium=0.25) in the reaction system, react at 80 ℃ for 3 hours, after the end of the final reaction, the product is washed and separated and drying to obtain a white solid powder with good fluidity.

[0067] The obtained product was characterized using the same method as in Example 1. The results are shown in Table 1.

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Abstract

The invention relates to a preparation method of an alkoxy magnesium carrier for an olefin polymerization catalyst. The preparation method comprises that magnesium, monohydric alcohol, a halogenation agent and an inert organic solvent are added into a reactor in an inert gas atmosphere and undergo a reaction in the inert gas atmosphere at a temperature of 0-90 DEG C for 1-30h to produce an alkoxy magnesium carrier, polyol is added into the alkoxy magnesium carrier, the mixture undergoes a reaction at a reaction temperature of 30-100 DEG C for 1-30h, the reaction product is stood and filtered and the filter residues are washed so that the alkoxy magnesium carrier for an olefin polymerization catalyst is obtained. The amorphous alkoxy magnesium carrier has a good particle form and high bulk density.

Description

technical field [0001] The invention relates to a preparation method of an alkoxymagnesium carrier used for an olefin polymerization catalyst. Background technique [0002] Currently, one of the most widely used olefin polymerization catalysts is the Ziegler-Natta catalyst supported on magnesium chloride. Magnesium chloride-supported Ziegler-Natta catalysts are generally solid catalyst components composed of magnesium, titanium, halogens, and electron-donating organic compounds. When used in polymerizing α-olefins such as propylene, it may be mixed with an organoaluminum compound as a cocatalyst and an organosilane compound as a stereoregularity regulator in an appropriate ratio and used. Since supported solid catalysts for olefin polymerization are used in various commercial polymerization processes such as slurry polymerization, bulk polymerization, gas phase polymerization, etc., they need to meet various requirements regarding particle morphology, such as suitable parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/02C07F3/02C07C31/28C07C29/70C07C31/24
Inventor 义建军高克京黄启谷谭魁龙程璐毛静王科峰崔伟松王永刚
Owner PETROCHINA CO LTD
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