Polymerization process condition optimization method taking polyolefin microscopic quality as target

Abstract

The invention discloses a polymerization process condition optimization method taking polyolefin microscopic quality as a target, belonging to the field of manufacture of chemical products. The polymerization process condition optimization method is characterized by building a process mathematic model based on reaction mechanism for an olefin polymerization process, and solving an optimal polymerization process condition which meets requirements on quality of specific products by taking average molecular weight or molecular weight distribution as an index of the microscopic quality of the polyolefin. The polymerization process condition optimization method can be used for calculating to obtain the optimal process operation condition under the condition with the given average molecular weight and molecular weight distribution of the polymers; the method can be applied to the design of structures of polymer products and can be used for shortening time for developing a novel type polymer, so that energy conservation and emission reduction are implemented; the economic benefit is increased; the polymerization process condition optimization method is simple and clear in principle and easy to understand and implement; the implementation of computer programming is facilitated; the on-line control of the quality of the polymer products is facilitated.

Description

Technical field [0001] The invention belongs to the field of chemical product manufacturing. More precisely, the invention relates to a method for optimizing polymerization process conditions of polyolefin products. Background technique [0002] The polyolefin industry often uses the melt index as the quality index of the product, but the melt index is a very macro parameter that only reflects the average molecular weight of the polymer. The melt index of different products may be the same, but the microstructure may be very different, and their use and processing properties are also very different. [0003] Molecular weight distribution is an important microscopic quality index of polyolefins, and has an important influence on the mechanical properties and processing properties of the product. The design and development of polyolefin products with balanced mechanical properties and processing properties requires detailed information on molecular weight distribution. Generally, t...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a polymerization process condition optimization method targeting the microscopic quality of polyolefins in view of the disadvantages of long time-consuming and low benefit in developing new polyolefin products with a specified molecular weight distribution in the prior art

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