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    • 2. 发明授权
    • Method and apparatus for removing volatile matter from highly viscous
material
    • 从高粘度物质中去除挥发性物质的方法和设备
    • US4361462A
    • 1982-11-30
    • US268999
    • 1981-05-20
    • Yuji FujiiChikao Oda
    • Yuji FujiiChikao Oda
    • B01D1/22C08F6/00
    • B01D1/226
    • This invention relates to a method and apparatus for removing volatile matter such as solvents and monomers from highly viscous materials such as synthetic polymers by the use of a falling-film evaporator.When a polymer composition containing a high concentration of the volatile matter, solvent and/or unreacted monomer, is preheated and then fed to a falling-film evaporator, the monomer reacts at a high temperature in the preheating, yielding its polymer of low molecular weight, and as a result the polymer quality deteriorates. When fed at a relatively low temperature, the polymer composition increases its viscosity with the vaporization of the solvent and/or monomer and becomes liable to partly solidify on account of the temperature drop due to the latent heat of vaporization, so that smooth treatment is difficult. This invention prevents the temperature drop as well as the reaction of the monomer, giving the polymer of high quality, by feeding the polymer composition of a relatively low temperature to a falling film evaporator and performing the heating of the polymer and the evaporation of the volatile matter simultaneously by supplying friction heat to the polymer composition within the clearances between the inner wall of the evaporator and the heating blades (19) attached to the outer ends of agitator blades (3), respectively.
    • PCT No.PCT / JP80 / 00181 Sec。 371日期:1981年5月20日 102(e)日期1981年5月20日PCT提交1980年8月12日PCT公布。 公开号WO81 / 00814 日本1981年4月2日。本发明涉及通过使用降膜蒸发器从诸如合成聚合物的高粘度材料中除去挥发性物质如溶剂和单体的方法和装置。 当含有高浓度挥发性物质,溶剂和/或未反应单体的聚合物组合物被预热,然后进料到降膜蒸发器时,单体在预热中在高温下反应,产生低分子量聚合物 ,结果聚合物质量恶化。 当在相对较低的温度下进料时,聚合物组合物随着溶剂和/或单体的蒸发而增加其粘度,并且由于由于蒸发潜热引起的温度下降而容易部分地固化,使得难以平滑处理 。 本发明通过向降膜蒸发器中加入较低温度的聚合物组合物并进行聚合物的加热和挥发物的蒸发来防止温度下降以及单体的反应,从而给出高质量的聚合物 通过在蒸发器的内壁和附接到搅拌器叶片(3)的外端的加热叶片(19)之间的间隙内向聚合物组合物供应摩擦热同时进行。