Alkoxy magnesium catalyst carrier as well as preparation method and application thereof

A technology of alkoxymagnesium catalyst and catalyst carrier, which is applied in the field of catalyst and its preparation, which can solve the problems of low bulk density, damage to particle shape, and complicated operation, and achieve uniform particle shape, avoid violent reaction, and simple operation

Active Publication Date: 2018-04-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] But all there are various shortcomings in the existing above-mentioned method, such as, in method one, mechanical pulverization can destroy the original shape of particle; The research 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 uniformity. round particles; if forcibly stirred, 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; in methods 3 to 5, the operation is very complicated, and in addition to Mg and ROH, other raw materials are required, so it cannot be used as a manufacturing method that meets the requirements.

Method used

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  • Alkoxy magnesium catalyst carrier as well as preparation method and application thereof
  • Alkoxy magnesium catalyst carrier as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a magnesium alkoxide catalyst carrier, which is prepared by the following steps:

[0035] In a reactor with a stirrer, install a reflux condenser, thermometer and burette. The upper part of the reflux condenser is connected with a pipe, and the other end of the pipe is connected with an oil seal device for easy observation of H 2 The production. After fully replacing with nitrogen, add 2g of magnesium powder, 10mL of decane, 30mL of absolute ethanol, 0.2g of iodine and 1.5mL of n-butyl titanate to the reactor, and start the activation reaction for 15 minutes until it reaches the reaction temperature of the reaction system , Every time the reaction system no longer emits H 2 After adding the same amount of magnesium powder, alcohol, iodine and decane as the previous addition, adding 5 times in total, after adding the last raw material and the reaction does not produce H 2 After that, the maturation reaction was continued for 2h. After the final rea...

Embodiment 2

[0038] This embodiment provides a magnesium alkoxide catalyst carrier, which is prepared by the following steps:

[0039] The same method as in Example 1 was carried out, except that 1.5 mL of tributyl phosphate was added to the reaction system and reacted at 78°C for 4 hours. After the final reaction, the product was washed, separated and dried to obtain a good Liquid white solid powder.

[0040] The obtained product was characterized using the same method as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0042] This embodiment provides a magnesium alkoxide catalyst carrier, which is prepared by the following steps:

[0043] Carry out the same method as Example 1, except that 1.5 mL of di-n-butyl phthalate is added to the reaction system and reacted at 78°C for 4 hours. After the final reaction, the product is washed, separated and dried. A white solid powder with good fluidity is obtained.

[0044] The obtained product was characterized using the same method as in Example 1, and the results are shown in Table 1.

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Abstract

The invention provides an alkoxy magnesium catalyst carrier as well as a preparation method and application thereof. The preparation method of the alkoxy magnesium catalyst carrier comprises the following steps: at 0-90 DEG C, in the presence of an inert gas atmosphere, mixing a magnesium metal, monohydric alcohol, a halogenating agent and a surfactant, and washing with an inert solvent, thereby obtaining the alkoxy magnesium catalyst carrier. The invention further provides the alkoxy magnesium catalyst carrier prepared by using the method, and the alkoxy magnesium catalyst carrier can be applied to olefin polymerization catalysis. The alkoxy magnesium catalyst carrier prepared by using the method is excellent in granular morphology, controllable in size and applicable to preparation of apolyolefin catalyst.

Description

Technical field [0001] The invention relates to a catalyst carrier and a preparation method thereof, in particular to a magnesium alkoxide catalyst carrier and a preparation method thereof, and belongs to the technical field of catalysts and preparation thereof. Background technique [0002] Currently, one of the most widely used olefin polymerization catalysts is the Ziegler-Natta catalyst supported by magnesium chloride. The Ziegler-Natta catalyst supported by magnesium chloride is usually a solid catalyst component composed of magnesium, titanium, halogen and electron-donating organic compounds. When used in the polymerization of α-olefins such as propylene, it can be mixed and used in an appropriate ratio with an organoaluminum compound as a co-catalyst and an organosilane compound as a stereoregularity regulator. Since supported solid catalysts for olefin polymerization are used in various commercial polymerization processes, such as slurry polymerization, bulk polymerizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/02
CPCC08F4/02C08F10/00C08F2410/01C08F2410/06C08F4/6548
Inventor 义建军王科峰胡杰陈兴峰袁苑崔伟松崔亮李志飞李荣波
Owner PETROCHINA CO LTD
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