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发明公开
CN109422832A 用于生产聚烯烃的方法 审中-实审

用于生产聚烯烃的方法
摘要：
本发明公开了一种用于生产聚烯烃的方法，所述方法包括步骤1至3并且满足要求1和2，其中步骤1：在第一气相聚合罐中将烯烃聚合以得到含聚烯烃粒子；步骤2：通过输送管将在步骤1中得到的含聚烯烃粒子输送至第二气相聚合罐；和步骤3：在第二气相聚合罐中，将烯烃在步骤2中输送的含聚烯烃粒子的存在下聚合；以及要求1：在第一气相聚合罐和输送管之间的连接位置高于在第二气相聚合罐和输送管之间的连接位置；和要求2：当P1表示在第一气相聚合罐中的压力并且P2表示在第二气相聚合罐中的压力时，满足130kPa≥P1-P2≥0。
摘要（英）：

A method for producing a polyolefin comprises steps 1 to 3 and satisfies requirements 1 and 2: Step 1: polymerizing an olefin in a first gas-phase polymerization tank to obtain polyolefin-containing particles; Step 2: transferring the polyolefin-containing particles obtained in the step 1 to a second gas-phase polymerization tank through a transfer pipe; and Step 3: polymerizing an olefin in the presence of the polyolefin-containing particles transferred in the step 2 in the second gas-phase polymerization tank; and Requirement 1: a connection place between the first gas-phase polymerization tank and the transfer pipe is higher than a connection place between the second gas-phase polymerization tank and the transfer pipe; and Requirement 2: when P 1 represents the pressure in the first gas-phase polymerization tank and P 2 represents the pressure in the second gas-phase polymerization tank, 130 kPa>=P 1 -P 2>=0 is satisfied.

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