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A Method for Optimizing Polymerization Process Conditions Aiming at the Microscopic Quality of Polyolefin

A polymerization process and micro-quality technology, applied in the direction of instruments, adaptive control, control/regulation systems, etc., can solve the problems of low efficiency and long time consumption, and achieve the effects of energy saving, emission reduction, time shortening, and online control

Active Publication Date: 2017-02-15
CHINA PETROLEUM & CHEM CORP +1
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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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  • A Method for Optimizing Polymerization Process Conditions Aiming at the Microscopic Quality of Polyolefin
  • A Method for Optimizing Polymerization Process Conditions Aiming at the Microscopic Quality of Polyolefin
  • A Method for Optimizing Polymerization Process Conditions Aiming at the Microscopic Quality of Polyolefin

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Embodiment Construction

[0032] The method of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. The meanings of each parameter appearing in the following are detailed in the symbol description table.

[0033] An embodiment of the present invention, its step is specifically as follows:

[0034] 1) Establish a mathematical model of the olefin polymerization process, the steps are as follows figure 1 shown in the right box.

[0035] ① First determine the form and operation method of the reactor. Industrial olefin polymerization devices include vertical tank reactors, loop reactors, horizontal stirred bed reactors, and fluidized bed reactors. The operating states include slurry phase, bulk phase, gas phase, and supercritical fluid. . However, different types of reactors can be considered as Continuous Stirred Tank Reactors (CSTR) such as figure 2 shown, or a combination of CSTRs.

[0036] ②Choose the thermodynamic state equation o...

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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, and 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 a product quality indicator, but the melt index is a very macroscopic parameter that only reflects the average molecular weight of the polymer. Different products may have the same melt index, but the microstructure may vary widely, and their use and processing properties may vary widely. [0003] Molecular weight distribution is an important microscopic quality index of polyolefins, which has an important impact on the mechanical properties and processing properties of products. To design and develop polyolefin products with balanced mechanical properties and processing properties, detailed information on molecular weight distribution is required. Usually, to develop new gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04C08F10/00
Inventor 顾雪萍胡庆云冯连芳周立进王艳丽笪文忠田洲
Owner CHINA PETROLEUM & CHEM CORP
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