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Continuous polymerization method

A polymerization method and a technology of polymerization units, which are applied in the field of continuous polymerization, can solve problems such as catalyst performance differences, polymer performance fluctuations, and polymerization product performance fluctuations, and achieve the effects of small performance fluctuations, stable performance, and automatic production

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of the catalyst by batch aging will cause fluctuations in the properties of the polymerization product. This is because: although each batch of catalysts is prepared according to certain conditions, it is difficult to control them to be completely the same, so that the performance of the obtained catalyst There are also differences and lead to large fluctuations in the properties of the final polymer

Method used

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Embodiment 1

[0043] This example is used to illustrate the continuous polymerization method provided by the present invention.

[0044] according to figure 1 The flow chart shown is aggregated:

[0045] (1) Preparation of rare earth catalyst:

[0046] Under the protection of nitrogen, a metering pump is used to continuously add neodymium neodecanoate / hexane solution with a concentration of 0.01mol / L and diisobutylaluminum monohydrogen / hydrogen with a concentration of 0.1mol / L to the first tank reactor 1. For the hexane solution and the butadiene / hexane solution with a concentration of 0.05mol / L, the control flow rates are 244mL / h, 366mL / h and 500mL / h respectively, the operating temperature is 40°C, and the residence time is 45min. After the first tank reactor 1 is filled with materials, use a metering pump to continuously add diethylaluminum chloride / hexane solution with a concentration of 0.02mol / L to the second tank reactor 2 at a flow rate of 280mL / h , the operating temperature is 30...

Embodiment 2

[0050] This example is used to illustrate the continuous polymerization method provided by the present invention.

[0051] according to figure 1 The flow chart shown is aggregated:

[0052] (1) Preparation of rare earth catalyst:

[0053] Under the protection of nitrogen, a metering pump is used to continuously add neodymium neodecanoate / hexane solution with a concentration of 0.01mol / L and diisobutylaluminum monohydrogen / hydrogen with a concentration of 0.1mol / L to the first tank reactor 1. For the hexane solution and the butadiene / hexane solution with a concentration of 0.05mol / L, the control flows are 366mL / h, 900mL / h and 2050mL / h respectively, the operating temperature is 60°C, and the residence time is 20min. After the first tank reactor 1 is filled with materials, use a metering pump to continuously add diethylaluminum chloride / hexane solution with a concentration of 0.02mol / L to the second tank reactor 2 at a flow rate of 680mL / h , the operating temperature is 10°C, an...

Embodiment 3

[0057] This example is used to illustrate the continuous polymerization method provided by the present invention.

[0058] according to figure 1 The flow chart shown is aggregated:

[0059] (1) Preparation of rare earth catalyst:

[0060] Under the protection of nitrogen, a metering pump is used to continuously add neodymium neodecanoate / hexane solution with a concentration of 0.01mol / L and diisobutylaluminum monohydrogen / hydrogen with a concentration of 0.1mol / L to the first tank reactor 1. For the hexane solution and the butadiene / hexane solution with a concentration of 0.05mol / L, the control flow rates are 270mL / h, 400mL / h and 850mL / h respectively, the operating temperature is 30°C, and the residence time is 56min. After the first tank reactor 1 is filled with materials, use a metering pump to continuously add diethylaluminum chloride / hexane solution with a concentration of 0.02mol / L to the second tank reactor 2 at a flow rate of 400mL / h , the operating temperature is 40...

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Abstract

The invention provides a continuous polymerization method comprising the steps: (1) continuously contacting carboxylic acid, an alkyl aluminum compound and conjugated diene in a first reactor in the presence of an inert organic solvent to obtain a contact product, continuously contacting the contact product and a halogen compound in a second reactor to obtain a mixture, and continuously ageing the mixture in a tubular reactor to obtain a rare earth catalyst; and (2) continuously delivering the conjugated diene, the rare earth catalyst and the inert organic solvent to a polymerization unit under a polymerization reaction condition to perform contact, wherein the rare earth catalyst is obtained in step (1). By using the continuous polymerization method provided by the invention, the obtained polymer is relatively stable in molecular weight and molecular weight distribution, small in fluctuation and relatively stable in performance. In addition, the continuous polymerization method can be used for realizing continuity and integration of catalyst preparation and polymerization reaction, increasing the production efficiency and reducing the labor intensity and production cost so as to have an extremely wide industrial application prospect.

Description

technical field [0001] The present invention relates to a continuous polymerization process. Background technique [0002] Compared with lithium-based, nickel-based, titanium-based, and cobalt-based butadiene rubbers, the butadiene rubber prepared with rare earth catalysts has the highest cis structure and the lowest vinyl unit, and the degree of branching is very small, making the macromolecular chain have High regularity and perfect linear structure endow rare earth butadiene rubber with high strength, high wear resistance and good dynamic mechanical properties to ensure the development of tires made from it in high speed, energy saving, safety and environmental protection. Especially suitable for tread compound and sidewall compound. Therefore, rare earth butadiene rubber is considered to be a kind of butadiene rubber with the best development prospects, and industrialized production has been realized in Italy, Germany, Russia and other countries. [0003] At present, t...

Claims

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Application Information

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IPC IPC(8): C08F36/04C08F36/06C08F2/01
Inventor 欧阳素芳赵姜维于国柱张杰李传清杨亮亮谭金枚辛益双孙伟
Owner CHINA PETROLEUM & CHEM CORP
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