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A Method for Removing Volatile Matters from Polymers by Supergravity with In-situ Supplementary Heat Energy
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A high-gravity, polymer technology, applied in separation methods, chemical instruments and methods, liquid degassing, etc., can solve the problems of high energy consumption and low efficiency, and achieve important environmental protection, high separation efficiency, and large processing capacity Effect
Active Publication Date: 2022-03-29
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
At present, in the traditional high-gravity devolatilization process (such as Chinese patent ZL200710120712.7), since a large amount of heat is taken away by gasification during devolatilization, it is necessary to raise the temperature of the shell jacket to maintain the cavity and rotor in the high-gravity rotating bed. temperature to supplement the heat taken away by devolatilization and gasification. In this process, the jacket heats up the air first, and the heated air then heats up the rotor. Its efficiency is low, resulting in high energy consumption
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Embodiment 1
[0062] A method for removing volatiles from polymers by supergravity with in-situ supplementary heat energy:
[0063] like figure 2 Shown, the parameter condition of removing the volatile matter in polyolefin elastomer (POE) is as follows:
[0064] 1) The operating conditions of the flash supergravity reactor 200 are: the liquid phase flow rate is controlled at 50 L / h, the rotation speed is adjusted at 1000 r / min, the vacuum degree is 0.01 MPa; the preheating temperature is 120°C.
[0065] 2) The operating conditions of the supergravity devolatilization device 100 are: the liquid phase flow rate is 50 L / h, the rotating speed is 1000 r / min, the distance between the dynamic magnetic disk and the static magnetic disk is 1 cm, the magnetic induction intensity is 40000 Gauss, and the vacuum The degree is 0.095MPa.
[0066] After the power loss test, using the high gravity devolatilization device of the present invention to replace the conventional high gravity reactor can save e...
Embodiment 2
[0068] A kind of method utilizing the supergravity devolatilization device of the present invention to remove the TDI in the polyurethane prepolymer:
[0069] like figure 2 Shown, remove the parameter condition of TDI in the polyurethane prepolymer as follows:
[0070] The operating conditions of the supergravity devolatilization device 100 are: in the process of removing TDI in the polyurethane prepolymer, the liquid phase flow rate is controlled to be 100L / h, the distance between the dynamic magnetic disk and the static magnetic disk is 1.5 cm, and the magnetic induction intensity It is 10000 Gauss; the speed is adjusted to 200-1400r / min, the vacuum degree is 0.095MPa; the imported liquid contains 2.2% TDI, and the devolatilization temperature is 110°C.
[0071] According to the detection of power loss, using the supergravity devolatilization device of the present invention to replace the conventional supergravity reactor can save energy consumption by 30%. The TDI remova...
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Abstract
The invention discloses a method for removing volatile matter in a polymer by supergravity with in-situ supplementary heat energy, comprising the following steps: preparing a supergravity devolatilization device; performing flash evaporation with a flash supergravity reactor; passing through a flash supergravity reactor After flash evaporation, the gas is pumped out with a vacuum pump, and the liquid is transported to the supergravity devolatilization device; the supergravity devolatilization device is used for devolatilization. Among them, the first-stage flash high-gravity reactor is used to remove the volatile matter in the polymer; the second-stage in-situ heating high-gravity devolatilization device is used to deeply remove the volatile matter in the polymer, and through the two-stage series high-gravity reaction The device strengthens the release of polymer volatiles. The supergravity device used in the method of the present invention does not need an additional heating device, and the rotating mechanical energy is converted into heat energy in situ by magnetic cutting, and automatically supplements the large amount of heat taken away by the gasification of volatiles during the devolatilization process.
Description
technical field [0001] The invention relates to a method for removing volatile matter from polymers. More specifically, it relates to a method for removing volatilization of polymers by supergravity with in-situ supplementary heat energy. Background technique [0002] Polymers are widely used in food packaging, water supply pipes, automotive interior parts, water cups, kitchen utensils, etc., and are closely related to people's lives. Polyolefin is an important polymer. Taking polyolefin as an example, the odor emitted by the raw materials of polyolefin and the products processed and produced by it belongs to the category of volatile organic compounds (VOC). The sources of volatile content of polyolefin can be summarized into the following three aspects: (1) Polymerization process residual substance. The main production processes of polyolefins include slurry polymerization, solution polymerization and gas phase polymerization. If the residual monomers and solvents in th...
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