Abstract
In the process of preparing polyolefin catalyst carrier, the particle size is often unqualified because of the adhesion of smaller particles to each other and the crushing effect of mechanical vibration. To improve the output of target products, reduce loss, and improve yield, a high-precision and high-efficiency carrier particle classification process was developed according to the embedded principle. The hydraulic hydrocyclone equipment designed in this work could eliminate short-circuit flow and achieve good integration of the internal flow field, thereby enhancing the separation accuracy and high separation efficiency. The process was successfully applied to the industry with smooth operation. The large-ball polyolefin catalyst carrier prepared by grading showed a small distribution coefficient, high yield, and excellent polymerization performance, and the average particle size of the graded large ball catalyst support was 65–75 μm with the SPAN < 0.7, which could meet the needs of DQC700 series catalyst products.
Highlights
At present, polyolefin technology has become one of the most important research and development directions for synthetic resin technology
There is no agglomeration phenomenon in the process of hydrohydrocyclone classification technology, which has the advantages of high efficiency, high yield, low cost, high accuracy, and the ability to achieve precise differential classification, and the SPAN value of the prepared catalyst carrier products can reach levels below 1.0, which is better than levels reached by previous studies [14,15]
The particle size of the carrier graded by the hydrocyclone fine classification process was D50 of 68.2 μm with the SPAN value < 0.7 and a yield of approximately 45%
Summary
Polyolefin technology has become one of the most important research and development directions for synthetic resin technology. There is no agglomeration phenomenon in the process of hydrohydrocyclone classification technology, which has the advantages of high efficiency, high yield, low cost, high accuracy, and the ability to achieve precise differential classification, and the SPAN value of the prepared catalyst carrier products can reach levels below 1.0, which is better than levels reached by previous studies [14,15]. Though it is possible for it to discharge directly from the overflow tube, if the feed pressure is very small, the slurry cannot form sufficient swing speed, meaning that the coarse particles cannot be graded according to granularity [17]. The particle size of the carrier graded by the hydrocyclone fine classification process was D50 of 68.2 μm with the SPAN value < 0.7 and a yield of approximately 45%. The the carrier particles hexane melting droplets were quickly were obtained by washing and drying
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