High-density polyethylene mother solution deactivation technology

Abstract

The invention relates to a high-density polyethylene (HDPE) mother solution deactivation technology. The technology comprises the following steps: (1) injecting alkali liquid or water into a conveyingpipeline of an HDPE mother solution from the upstream; conveying the HDPE mother solution added with the water or the alkali liquid into a mixer; (2) sufficiently mixing under the stirring of an axial flow blade of the mixer so as to deactivate a catalyst in the HDPE mother solution and obtain a catalyst deactivated HDPE mother solution; (3) pressurizing the catalyst deactivated HDPE mother solution under the action of a centrifugal blade of the mixer and then conveying the solution into a separation tank; separating the solution under the action of low-pressure steam through controlling a pressure differential type liquid level transmitter I and a pressure differential type liquid level transmitter II, so as to obtain volatile matters, a separated HDPE mother solution, separated water oralkali liquid and steam condensate; after carrying out secondary condensation on the volatile matters, enabling the volatile matters to reflow into the separation tank; discharging the separated water or alkali liquid into a water treatment system; conveying the steam condensate into a condensate pipeline; conveying the separated HDPE mother solution into a subsequent section. The method providedby the invention is simple and easy to implement.

Description

technical field [0001] The invention relates to the field of high-density polyethylene (HDPE) production, in particular to a high-density polyethylene mother liquor inactivation process. Background technique [0002] HDPE is a thermoplastic polyolefin produced by ethylene copolymerization. It has good heat resistance and cold resistance, good chemical stability, can resist most acid and alkali erosion, and has excellent electrical insulation. It is an important industrial raw material. [0003] In the HDPE production process, the polymerization reaction is under a certain pressure, and ethylene is polymerized under the action of a catalyst to form HDPE. During this process, part of the reaction catalyst will enter the HDPE mother liquor. Since the catalyst still has a certain activity, subsequent transportation , HDPE is prone to explosion accidents during the process of packaging, storage and transportation. Contents of the invention [0004] The technical problem to be ...

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Problems solved by technology

[0003] In the HDPE production process, the polymerization reaction is under a certain pressure, and ethylene is polymerized under the action of a catalyst to form HDPE. During this process, part of the reaction catalyst will enter the HDPE mother liquor. Since the catalyst still has a certain activity, subsequent transportation HDPE is prone to explosion accidents during packaging, storage and transportation

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