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A method for classifying catalyst supports

A catalyst carrier and cyclone classification technology, which is applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of inability to achieve accurate particle size classification of carriers, high particle size distribution coefficient, and influence on catalyst performance. Realize the effect of product quality, large economic benefits and small investment

Active Publication Date: 2017-08-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing production plan, the simplest vibrating sieve screening method is used for carrier classification. Due to the fine particles of the carrier itself and the characteristics of the vibrating sieve, during the screening process, the phenomenon of carrier agglomeration and bridging caused by electrostatic interaction often occurs. , the sieving effect is poor, and the accurate classification of the particle size of the carrier cannot be achieved, and the particle size distribution coefficient is high, which affects the performance of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The magnesium chloride alcoholate carrier was prepared by a high-speed stirring method (the alcohol-magnesium ratio was 2.55, the particle size distribution coefficient was 1.12, and the particle size range was 10-110 μm), and the prepared carrier was dispersed in hexane, and the concentration of the carrier was 20% by weight , use a hydrocyclone (also known as a hydrocyclone) for classification, the pressure difference between the inlet and the outlet is 0.3MPa, the temperature is 40°C, the flow rate is 1m3 / h, the mixture of carrier and hexane is in the hydrocyclone Separation under the action of centrifugal force;

[0032] After separation, the dispersion liquid containing the carrier whose particle size range is greater than 95 μm is discharged from the bottom of the hydrocyclone, and the dispersion liquid containing the carrier whose target particle size range is below 95 μm is discharged from the top of the hydrocyclone, and the It is dried to obtain a carrier with...

Embodiment 2

[0039] Classify according to the method of Example 1, the difference is that the concentration of the catalyst carrier is 10% by weight, the magnesium alcohol ratio of the carrier is 2.55, the particle size distribution coefficient is 1.38, the particle size range is 10-110 μm, and the pressure difference between the inlet and the outlet The temperature is 0.2MPa, the temperature is 25°C, and the other conditions are the same, and the target particle size range is below 95μm. , wherein the carrier content in the particle size range >95 μm is less than 2% by weight.

Embodiment 3

[0041] The magnesium chloride alcoholate carrier was prepared by high-speed stirring method (alcohol magnesium ratio is 2.55, the particle size distribution coefficient is 1.12, and the particle size range is 1-110 μm), and the prepared carrier is dispersed in hexane, and the concentration of the carrier is 20% by weight , use a hydrocyclone (also known as a hydraulic particle classifier) ​​to carry out 2 classifications according to the following steps:

[0042] The dispersion containing the carrier is first subjected to the first cyclone classification, and the condition of the first cyclone classification is such that the dispersion containing the catalyst carrier with a particle size range of >95 μm is discharged from the bottom of the cyclone classification device, while the dispersion containing the particle size The dispersion of the catalyst support with a range below 95 μm is subjected to the second cyclone classification, and the condition of the second cyclone classi...

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PUM

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Abstract

The invention provides a catalyst carrier classification method, wherein the method comprises the steps of: performing the cyclonal classification for dispersing liquid containing a catalyst carrier, and obtaining dispersing liquid containing a target catalyst carrier with a target particle size range through controlling the conditions of the cyclonal classification. The method can realize high-precision classification, can shorten the technological process and reduce the cost, and can safely and stably operate for a long time. The method, disclosed by the invention, is used for classifying to realize the improvement of product quality and the maximum economic benefit based on a traditional device by using the lowest investment.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a method for grading catalyst carriers. Background technique [0002] At present, BASELL (formerly Montell) is the world leader in polypropylene spherical high-efficiency catalyst technology. After nearly 20 years of research and improvement, the performance of BASELL's spherical catalyst has been greatly improved. The average particle size D(50) of the catalyst can reach 70-80μm (such as MC118 catalyst), and the small one can reach Reaching 20-30μm (such as MC105, MC102S catalyst), forming a multi-variety, serialized, high-performance spherical catalyst system. The DQ catalyst developed by the Beijing Research Institute of Chemical Industry in China has also formed a series and has good comprehensive performance. It has even surpassed the level of similar catalysts of BASELL in terms of polymerization activity indicators. The sales momentum of DQ catalyst is g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 秦金来祝平杜陕君谢伟杜传斌
Owner CHINA PETROLEUM & CHEM CORP