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Catalyst, preparation method, catalyst system with polymer porous microspheres as carrier and use method

A technology of porous microspheres and catalysts, applied in the field of polypropylene Ziegler-Natta catalysts, can solve problems such as single catalytic system

Active Publication Date: 2019-03-08
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is estimated that 90% of polypropylene is currently catalyzed by the Ziegler-Natta catalytic system with magnesium chloride as the carrier, and the catalytic system is relatively simple.

Method used

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  • Catalyst, preparation method, catalyst system with polymer porous microspheres as carrier and use method
  • Catalyst, preparation method, catalyst system with polymer porous microspheres as carrier and use method
  • Catalyst, preparation method, catalyst system with polymer porous microspheres as carrier and use method

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preparation example Construction

[0042] The present invention also provides a preparation method of the catalyst, which uses the metal organohalogen compound as a bridge to connect the organometallic compound of magnesium halide to the cyano-functionalized carrier, and then to the active center, that is, "-CN-Mg -Active Center-"The "double carrier" structure of the bonding mode, its preparation steps and conditions are as follows:

[0043] Step 1: preparing carrier cyano-functionalized monodisperse porous styrene-divinylbenzene copolymer microspheres;

[0044] Step 2: reacting the carrier in step 1 with a metal organohalogen compound to obtain a suspension;

[0045] Step 3: React the suspension obtained in Step 2 with an internal electron donor, and then add a transition metal titanium halide to react to obtain a catalyst.

[0046] According to the present invention, the cyano-functionalized monodisperse porous styrene-divinylbenzene copolymer microspheres are first prepared by "two-step seed swelling method...

Embodiment 1

[0069] Embodiment 1: the preparation of polystyrene (PS) seed microsphere

[0070] Add 10g of refined styrene, 22g of ethanol, 66g of ethylene glycol monomethyl ether, 0.1g of refined azobisisobutyronitrile and 2g of PVP-K30 into a 250mL all-necked Erlenmeyer flask, and seal it under argon protection; at 70°C , 80rpm, shake in a constant temperature water bath for 24h. After the reaction, the reaction solution was settled by centrifugation, the supernatant was removed, the precipitate was washed several times with ethanol and deionized water, and dried in vacuum to obtain PS seed microspheres with an average particle size of 4.81 μm and a viscosity-average molecular weight of 33,000. Make PS-1#.

Embodiment 2

[0071] Embodiment 2: the preparation of polystyrene (PS) seed microsphere

[0072] Add 10g of refined styrene, 44g of ethanol, 44g of ethylene glycol monomethyl ether, 0.1g of refined azobisisobutyronitrile and 2g of PVP-K30 into a 250mL all-necked Erlenmeyer flask, and seal it under argon protection; at 70°C , 80rpm, shake in a constant temperature water bath for 24h. After the reaction, the reaction solution was settled by centrifugation, the supernatant was removed, the precipitate was washed several times with ethanol and deionized water, and dried in vacuum to obtain PS seed microspheres with an average particle size of 1.93 μm and a viscosity-average molecular weight of 78,000. Make PS-2#.

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Abstract

The invention provides a catalyst, a preparation method, a catalyst system with polymer porous microspheres as a carrier and a use method, and belongs to the technical field of catalysts. The catalystis prepared by the following steps: firstly, carrying out combined action on a metal organic halogen compound and the carrier; secondly, treating with internal donors; enabling a treated substance toreact with halide of transition metal titanium and washing to obtain an immobilized solid catalyst; the carrier is a cyanide functionalized monodispersed porous styrene-divinyl benzene copolymer microsphere; the internal donors are phthalate compounds, succinate compounds, alkyl substituted diether compounds or aryl substituted diether compounds. The invention also provides the catalyst system which takes polymer porous microspheres as the carrier; the catalyst system comprises the catalyst and a cocatalyst, or the catalyst, the cocatalyst and the internal donors. The invention also providesthe use method of the catalyst system. The catalyst provided by the invention has high catalytic efficiency and good product morphology.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst, a preparation method, a polypropylene Ziegler-Natta catalyst with polymer porous microspheres as a carrier and a use method. Background technique [0002] Polypropylene has the characteristics of regular structure, strong mechanical properties and good thermal properties. It is widely used in daily life and industrial production, and is one of the five general-purpose plastics. In 2016, domestic polypropylene production and apparent consumption reached 17.9 million tons and 20.7 million tons respectively, and the import volume was about 3 million tons. Polypropylene has the shortest industrial production history in general plastics, and its rapid development and growth has an important relationship with the continuous and vigorous development of polypropylene catalytic technology. At present, industrial polypropylene catalysts have been developed to the...

Claims

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Application Information

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IPC IPC(8): C08F110/06C08F4/02C08F4/645C08F4/646
CPCC08F110/06C08F2500/15C08F4/645C08F4/027
Inventor 周光远刘博聂赫然杨正军
Owner 芜湖万隆新材料有限公司
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