Propylene polymerization method and propylene polymerization device
A technology of propylene polymerization and propylene, which is applied in the field of propylene polymerization method and device, and compound polymerization, which can solve the problems of large steam consumption and complicated process, and achieve the effects of high reaction temperature, uniform particle size distribution, and strong heat removal ability
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Embodiment 1
[0039] Embodiment 1 The method and device of propylene polymerization
[0040] see figure 1 , a propylene polymerization device, comprising a prepolymerization reaction zone 1, a liquid phase polymerization reaction zone 2 and a gas phase polymerization reaction zone 3 connected by pipelines in sequence, wherein,
[0041] The prepolymerization reaction zone 1 is made up of propylene cooler 10 and prepolymerization reactor 11, and prepolymerization reactor 11 is provided with material inlet and outlet, and propylene cooler 10 is connected with the material inlet of prepolymerization reactor 11;
[0042] The liquid phase polymerization zone 2 includes a loop reactor 20, the material outlet of the prepolymerization reactor 11 is connected to the loop reactor 20, and a cooling water jacket 22 is provided outside the loop reactor. A material circulation pump 21 is installed at the bottom of the loop reactor to keep the mixed material in the loop reactor in a circulating state, and...
Embodiment 2
[0070] The process of adopting the device described in embodiment 1 to produce ethylene-propylene binary random copolymerization polypropylene is as follows:
[0071] 1. Prepolymerization reaction:
[0072] The room temperature liquid phase propylene (25°C, 3.5-4.5MPag) is cooled to 5-10°C through the propylene cooler 10, and enters the prepolymerization reactor 11, where the prepolymerization reaction is carried out.
[0073] The residence time of the catalyst in the pre-polymerization reactor is 12-17 minutes. The pre-polymerization reactor is operated with a full tank, and the catalyst and propylene are mixed evenly through the stirrer. The reaction temperature is 22-28 °C and the pressure is 3.5-4.0 MPag.
[0074] 2. Liquid phase polymerization:
[0075] The catalyst and unreacted propylene passing through the prepolymerization reactor enter the loop reactor 20 together with the newly added liquid phase propylene.
[0076] At the same time, the new liquid phase propylene...
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Abstract
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