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1-butene polymer and 1-butene continuous slurry polymerization method

A technology of slurry polymerization and butene, applied in the field of olefin polymerization, can solve the problems of low polymerization activity, difficult transportation, sticky polymerization system, etc., and achieve the effect of simple process, simple separation and low particle shape

Active Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention aims to provide a 1-butene polymer and a 1-butene continuous slurry polymerization method, which can not only solve the problem of low polymerization activity, polymerization The system is sticky and the transportation is difficult, and it can also obtain 1-butene polymer with good particle shape and high isotactic index

Method used

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Embodiment approach

[0020] According to a preferred embodiment of the present invention, the continuous slurry polymerization comprises the first slurry polymerization and the second slurry polymerization carried out in sequence, the Ziegler-Natta catalyst system, 1-butene and optionally The α-olefins are continuously introduced into the first liquid phase reactor filled with liquid propane to carry out the first slurry polymerization reaction, and the first slurry polymerization reaction product obtained is continuously introduced with 1-butene and optional α-olefins filled with liquid propane The second slurry polymerization reaction is carried out in the second liquid phase reactor. More preferably, the first slurry polymerization reaction is carried out in the absence of hydrogen or in a hydrogen atmosphere of 100-3000 ppm, the second slurry polymerization reaction is carried out in a hydrogen atmosphere of 100-3000 ppm, and the second slurry polymerization reaction is carried out in a hydroge...

Embodiment 1

[0045] The polymerization reaction is carried out on a set of 25kg / hr double-loop pilot plant, and the main equipment includes a pre-polymerization reactor, a first loop reactor and a second loop reactor. Polymerization method and steps are as follows:

[0046] (1) Pre-complexation reaction:

[0047] Main catalyst (MgCl 2 / TiCl 4 Supported Ziegler-Natta catalyst), cocatalyst (triethylaluminum) and external electron donor (dicyclopentyldimethoxysilane) were pre-contacted at 6°C for 8 minutes, and then added continuously to the continuous stirred tank prepolymerization reaction The prepolymerization reactor is carried out in the reactor. Triethylaluminum (TEA) flow rate is 6.33g / hr, dicyclopentyldimethoxysilane (DCPMS) flow rate is 0.3g / hr, main catalyst flow rate is 0.6g / hr, TEA / DCPMS consumption ratio is 50( mol / mol). The prepolymerization is carried out under the environment of 1-butene liquid phase body, the temperature is 15°C, and the residence time is 4min. Under the...

Embodiment 2

[0051] The catalyst used in embodiment 2, pre-complexation, polymerization process conditions and auxiliary agent formula and add-on are the same as embodiment 1. The difference from Example 1 is that the amount of hydrogen in the second loop reactor is changed to 1000ppm, and the obtained polymer analysis results are listed in Table 1.

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Abstract

The invention belongs to the field of olefin polymerization, and discloses a 1-butene polymer and a 1-butene continuous slurry polymerization method. The 1-butene continuous slurry polymerization method comprises the following step: in the presence of a Ziegler-Natta catalytic system, carrying out a continuous slurry polymerization reaction on 1-butene and optional alpha-olefin by taking liquid propane as a solvent. According to the 1-butene continuous slurry polymerization method, liquid propane is used as a solvent; the problems that the polymerization activity is not high, and a polymerization system becomes sticky due to the fact that the polymer is dissolved in a solvent under the high-temperature polymerization condition can be effectively solved, and the obtained 1-butene polymer further has high isotacticity, a low total volatile organic compound (VOC) content and good particle morphology. Besides, the 1-butene continuous slurry polymerization method is simple in process, the subsequent polymer separation process is also simple, and industrial production is facilitated.

Description

technical field [0001] The invention belongs to the field of olefin polymerization, and more specifically relates to a 1-butene polymer and a 1-butene continuous slurry polymerization method. Background technique [0002] As we all know, 1-butene polymer has great advantages in creep resistance, environmental crack resistance and impact resistance, and can be widely used in pipes, such as hot water pipes, water supply pipes, industrial pipes and Building pipes, etc. The introduction of α-olefins (ethylene, propylene, etc.) The starting temperature is suitable for the field of film production and has been widely used in food, hygiene product packaging and other fields. [0003] At present, the preparation methods of 1-butene polymer mainly include gas phase method, solution method and bulk method, wherein the bulk method includes slurry bulk method and liquid phase bulk method. [0004] The gas phase method usually adopts a fluidized bed gas phase reactor, and CN102040693,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/08C08F2/00C08F210/16C08F210/02C08F210/06C08F210/08
CPCC08F10/08C08F210/16C08F210/08C08F2/00C08F210/02C08F2500/15C08F2500/18C08F210/06
Inventor 宋文波毕福勇陈明斯维刘振杰
Owner CHINA PETROLEUM & CHEM CORP
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