Oxidized polyethylene separation tower and method

Abstract

The invention discloses an oxidized polyethylene separation tower. The oxidized polyethylene separation tower comprises a base, wherein a solid-liquid separation mechanism and a liquid-liquid separation mechanism are mounted on the upper end surface of the base and are communicated through a connecting pipe; a feeding pipe is communicated with the solid-liquid separation mechanism; a light liquiddischarging pipe and a heavy liquid discharging pipe are communicated with the liquid-liquid separation mechanism; a drive mechanism and a transmission mechanism are mounted at the upper end of the liquid-liquid separation mechanism. The invention further discloses an oxidized polyethylene separation method. The method comprises following steps: S1, filtering; S2, screening; S3, solid-liquid separation; S4, liquid-liquid separation; S5, repeating of operation. The structure is ingenious, the solid-liquid separation mechanism and the liquid-liquid separation are combined, separation of smaller-particle waxy semi-solids and waxy solids and separation of white viscous oxidized polyethylene with different molecular weights are realized, separation speed of oxidized polyethylene is increased, and loss in a material transfer process is reduced.

Description

technical field [0001] The invention relates to the technical field of polymer separation, in particular to an oxidized polyethylene separation tower and a separation method thereof. Background technique [0002] Oxidized polyethylene is also called polyethylene glycol. The chemical structural formula of the polymer is, which includes a series of products with low to medium molecular weight. Usually, in industrial production, ethylene oxide is slowly added to ethylene glycol or water. However, because of the vapor pressure, the maximum molecular weight of the pure polymer we obtain in actual production is tetraethylene glycol, and all the oxidized polyethylene products we usually obtain are mixtures of oxidized polyethylenes with different polymerization degrees According to the molecular weight of polymeric glycol, we usually divide its appearance into three types, the first is white viscous liquid, the molecular weight of this kind of oxidized polyethylene is usually betwe...

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Problems solved by technology

[0003] In actual production and application, we need to separate different polymers. It is relatively simple for the larger solids in the second waxy semi-solid and the third hard waxy solid. How to separate the particles is relatively simple. Small waxy semi-solids and waxy solids are more difficult; at the same time, white viscous liquids with different molecular weights are used in different fields. For example, polyethylene oxide with a molecular weight of 200 is generally used as a lubricant in personal care bottles and metal processing. The molecular weight is 400 oxidized polyethylene is generally used to make ink matrix and capsule carrier, so how to separate the liquid with molecular weight between 200-700 is also difficult

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