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Device for producing polypropylene by intermittent liquid phase bulk polymerization method and method

A technology of liquid phase body and polypropylene, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult temperature control and weak post-response, and achieve the effects of solving difficult control, reducing temperature fluctuations, and increasing equipment output

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0021] The object of the present invention is to, in view of the above problems, propose a kind of equipment and method for producing polypropylene by intermittent liquid-phase bulk method, which can effectively overcome the difficulty in controlling the initial reaction temperature and weak post-reaction in the device for producing polypropylene by intermittent liquid-phase bulk method question

Method used

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  • Device for producing polypropylene by intermittent liquid phase bulk polymerization method and method
  • Device for producing polypropylene by intermittent liquid phase bulk polymerization method and method
  • Device for producing polypropylene by intermittent liquid phase bulk polymerization method and method

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Embodiment 1

[0059] An ABB online gas chromatograph analyzer 3 was added to the 5-liter batch liquid-phase polypropylene reactor, and the sampling period was 6 minutes. After the reaction started, the concentrations of propylene and propane in the reactor 2 were regularly analyzed, and the polymerization rate and conversion rate of propylene in different time periods were calculated. At the beginning of the reaction, the heating device works to heat up the hot water quickly, such as starting the hot water valve; during the reaction process, adjust the flow of cooling water according to the propylene polymerization rate, so as to maintain the propylene polymerization rate within a certain range; when the conversion rate reaches 70% Propylene is recovered and discharged.

[0060] In this test, compared with isothermal polymerization, 20% more catalyst was added, and the polymerization temperature was low and then high during the reaction process, and the operation was stable. The single-pot...

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Abstract

The invention discloses a device for producing polypropylene by using an intermittent liquid phase bulk polymerization method and a method; the device for producing the polypropylene by using the intermittent liquid phase bulk polymerization method comprises a reaction kettle, a temperature control system and a gas chromatographic analyzer which are connected with the reaction kettle, wherein the gas chromatographic analyzer is electrically connected with the temperature control system; the gas chromatographic analyzer can be used for timely or continuously detecting a content ratio of the propylene to an inertia component not participating in chemical reaction in the reaction kettle; and the rate of polymerization of the propylene can be figured out according to the content ratio. The temperature control system is started to control the rate of polymerization of the propylene to stabilize in a target polymerization rate. According to the device and the method provided by the invention, the problems of difficult control on temperature in the initial stage of reaction and weak reaction in the later stage of reaction existing in the traditional device for producing the polypropylene by using the intermittent liquid phase bulk polymerization method are effectively overcome, the control stability of producing the polypropylene by using the intermittent liquid phase bulk polymerization method and the device output are effectively increased; and the device provided by the invention has the advantages of simple structure, stable temperature control and high degree of automation.

Description

technical field [0001] The present invention relates to a plant and method for producing polypropylene. More specifically, the present invention relates to a batch liquid-phase bulk method for producing polypropylene and a method. Background technique [0002] The equipment for the production of polypropylene by the batch liquid phase bulk method is a polypropylene production process independently developed by my country. The equipment mainly includes process units such as raw material refining, polymerization reaction, flash deactivation, granulation and packaging. The process unit of the polymerization reaction includes propylene metering tank, activator feeding tank, catalyst feeding tank, hydrogen metering tank, reactor, hot water tank, hot water pump, cold water pipeline and steam pipeline and other equipment. The reactors are all tank-type reactors, and the heat removal of the reactors is realized by jackets and internal cooling pipes. See: Li Yugui, Chen Ningguan, et...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F2/02C08F2/01G01N30/02
Inventor 杨芝超杜亚锋刘旸仝钦宇陈江波
Owner CHINA PETROLEUM & CHEM CORP
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