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Carbon-based catalyst, preparation method thereof and catalyst system for dicyclopentadiene polymerization

A carbon-based catalyst, dicyclopentadiene technology, applied in the direction of chemical recycling, etc., can solve the problems such as the power supply of the coordination group is not as good as that of the phenoxy group, the catalyst utilization rate is low, and the specific surface area is small.

Active Publication Date: 2021-07-30
长春三友智造科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polystyrene-supported tungsten catalyst belongs to physical embedding, its specific surface area is small, and the utilization rate of the catalyst is low. Although the molecular sieve has a large specific surface area, the coordination group on its surface is not as good as the phenoxy group. , and the dispersion of molecular sieves in dicyclopentadiene also has some problems, which will affect the properties of polydicyclopentadiene

Method used

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  • Carbon-based catalyst, preparation method thereof and catalyst system for dicyclopentadiene polymerization
  • Carbon-based catalyst, preparation method thereof and catalyst system for dicyclopentadiene polymerization
  • Carbon-based catalyst, preparation method thereof and catalyst system for dicyclopentadiene polymerization

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preparation example Construction

[0034] The invention provides a method for preparing a carbon-based catalyst, comprising the following steps:

[0035] (1) Pre-activating the carbon carrier with an acid to obtain an activated carbon carrier;

[0036](2) impregnating the activated carbon support and the mixed solution of active components to obtain a carbon-based catalyst; the active components in the mixed solution of active components include transition metal oxychloride complexes.

[0037] The invention uses acid to activate and pretreat the carbon support to obtain the activated carbon support. The invention uses acid to activate and pretreat the carbon support to obtain the activated carbon support. In the present invention, the carbon carrier is preferably one or more of activated carbon, carbon black and mesoporous carbon; the specific surface area of ​​the carbon carrier is preferably 500-3000m 2 / g, more preferably 1500-2000m 2 / g, the particle size is preferably 1 to 20 μm, more preferably 1 to 5 ...

Embodiment 1

[0064] Embodiment 1: Preparation of carbon-supported tungsten catalyst

[0065] (1) Under the condition of nitrogen protection, tert-butanol, WCl 6 , dry toluene mixed and stirred for 10h, wherein WCl 6 The dosage is 20g, the volume of toluene is 70mL, tert-butanol and WC1 6 Molar ratio is 0.25, obtains the reaction solution, WC1 in the reaction solution 6 and WOC1 4 The total concentration of 0.73mol / L, WC1 6 with WOCl 4 The molar ratio is 3:1.

[0066] (2) 11.1g of nonylphenol is added in 30 milliliters of toluene to obtain nonylphenol solution, and the nonylphenol solution is added in the reaction solution of step (1), then use N 2 The HCl was removed by bubbling for 1 hour, after which 10.1 g of 2,4-pentanedione was added by syringe, again with N 2 The HCl was removed by bubbling for 1 h to obtain a solution of mixed active ingredients.

[0067] (3) The activated carbon is activated and pretreated with 1mol / L nitric acid, the weight ratio of carbon support and nitr...

Embodiment 2

[0069] Embodiment 2: Preparation of carbon-supported molybdenum catalyst

[0070] (1) Under the condition of nitrogen protection, di-tert-butyl-p-cresol, MoCl 5 , dry toluene mixed and stirred for 10h, where MoCl 5 The dosage is 10g, the volume of toluene is 50mL, di-tert-butyl p-cresol and MoCl 5 Molar ratio is 0.25, obtains reaction solution, and in reaction solution MoCl 5 and MoOC1 3 The total concentration of 0.73mol / L, MoC1 5 with MoOCl 4 The molar ratio is about 3:1.

[0071] (2) 11.1g of nonylphenol is added in 30 milliliters of toluene to obtain a nonylphenol solution, and the nonylphenol solution is added to the reaction solution of step (1), then use N 2 The HCl was removed by bubbling for 1 hour, after which 10.1 g of 2,4-pentanedione was added by syringe, again with N 2 The HCl was removed by bubbling for 1 h to obtain a solution of mixed active ingredients.

[0072] (3) The activated carbon is activated and pretreated with 1mol / L acetic acid, the weight r...

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Abstract

The invention relates to the technical field of dicyclopentadiene polymerization catalysts, and provides a carbon-based catalyst, a preparation method thereof and a catalyst system for dicyclopentadiene polymerization. According to the invention, the carbon carrier is subjected to activation pretreatment by using acid, so that a large number of phenolic hydroxyl groups are formed on the surface of the carbon carrier; and then the active component is loaded on the carbon carrier through chelation of transition metal ions and the phenolic hydroxyl groups, so that the activity and stability of the catalyst are improved. The carbon-based catalyst provided by the invention has relatively high activity and stability, is stable to air, and can be used as a main catalyst for dicyclopentadiene polymerization, so that the mechanical property of a product can be improved, a polymerization reaction has a proper operation window, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the technical field of dicyclopentadiene polymerization catalysts, in particular to a carbon-based catalyst, a preparation method thereof and a catalyst system for dicyclopentadiene polymerization. Background technique [0002] Dicyclopentadiene is a by-product of petroleum cracking to produce ethylene and coal coking. Its structure is shown in formula I. It contains two unsaturated double bonds, and both rings containing unsaturated double bonds can undergo ring-opening. Position polymerization, and dicyclopentadiene monomer is also prone to self-polymerization. Dicyclopentadiene has broad application prospects in the fields of fine chemicals and polymer chemistry, and has huge scientific research value and economic benefits. Its polymers have been widely used in agriculture, automobiles, chemical industries and other industries due to their excellent performance. . [0003] [0004] The dicyclopentadiene reaction injecti...

Claims

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Application Information

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IPC IPC(8): C08G61/08
CPCC08G61/08C08G2261/418C08G2261/11Y02P20/584
Inventor 白大成潘东野崔占臣王振旅史作森
Owner 长春三友智造科技发展有限公司
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