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1. 发明授权

US5587437A Process of producing vinyl chloride type polymer 失效
标题翻译：生产氯乙烯型聚合物的工艺
公开(公告)号：US5587437A
公开(公告)日：1996-12-24
申请号：US528097
申请日：1995-09-14
申请人： Fumiaki Adachi , Tadashi Amano , Yoshihrio Shirota , Yoshitaka Okuno
发明人： Fumiaki Adachi , Tadashi Amano , Yoshihrio Shirota , Yoshitaka Okuno
IPC分类号： B01J19/18 , C08F2/18 , C08F14/06
CPC分类号： B01J19/18 , C08F14/06 , B01J2219/00094 , B01J2219/00101 , B01J2219/185
摘要： This process uses such a polymerization apparatus that the inner volume of the polymerization vessel is 100 m.sup.3 or more, the ratio L/D of the length L of the straight barrel to the inner diameter D is 1.5 or more, and the uppermost stirring impeller is arranged in the range of 150 to 300 cm downwardly from the upper end position of the straight barrel of the polymerization vessel in terms of the height of the center line of the vertical width of the blade, and is characterized in that after the liquid contents of the polymerization vessel are heated to a temperature near the polymerization temperature, noncondensable gases coming into the reflux condenser are evacuated under such conditions that the flow rate of the evacuation is 10 to 100 Nm.sup.3 /hour and the evacuation time is a period equal to 20% or more of the total polymerization time, and simultaneously with or after the start of the evacuation of the noncondensable gases, the cooling by the reflux condenser is started. According to the present invention, even if a long-term operation is carried out by using a large-sized polymerization vessel, since the quantity of heat dissipation by the reflux condenser can be kept stable, and scale can be prevented from being deposited on the polymerization vessel inner wall and the like.
摘要翻译：该方法使用聚合装置的内部体积为100m 3以上的聚合装置，直筒的长度L与内径D的比L / D为1.5以上，最上方的搅拌叶轮为相对于叶片的垂直宽度的中心线的高度，从聚合容器的直筒的上端位置向下方设置在150〜300cm的范围内，其特征在于，将聚合容器加热到接近聚合温度的温度，进入回流冷凝器的不凝气体在抽空流量为10至100Nm 3 /小时，抽空时间为20％的时间的条件下抽真空，或更多的总聚合时间，并且在不可冷凝气体排空开始时或之后同时开始通过回流冷凝器的冷却。根据本发明，即使通过使用大型聚合容器进行长期操作，由于回流冷凝器的散热量可以保持稳定，并且可以防止垢在其上沉积聚合容器内壁等。

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