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Method for separating regenerated polymer low-molecular impurity and vacuum separating tower thereof

A technology of vacuum separation and separation method, which is used in the separation of low molecular impurities in regenerated polymers and in the field of vacuum separation towers, which can solve the problem that low molecular impurities cannot be separated.

Inactive Publication Date: 2010-06-02
NINGBO DAFA CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical defect that the low-molecular-weight impurities in the separation of the above-mentioned polymer wastes cannot be separated, the first purpose of the present invention is to provide a method for separating low-molecular-weight impurities of regenerated polymers with good separation effect and simple process

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  • Method for separating regenerated polymer low-molecular impurity and vacuum separating tower thereof
  • Method for separating regenerated polymer low-molecular impurity and vacuum separating tower thereof
  • Method for separating regenerated polymer low-molecular impurity and vacuum separating tower thereof

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Such as figure 1 The separation method of low molecular impurities in the regenerated polymer is shown. The method includes: 1. Melting and liquefying the regenerated polymer at high temperature in the mechanical extruder 1; 2. Sending the liquid polymer into the vacuum separation tower 2, and the liquid polymer increases through the multi-layer perforated plate 21 of the vacuum separation tower 2. The surface area vaporizes low-molecular impurities, and the liquid polymer is discharged through the delivery pump 9 below the vacuum separation tower 2 and the liquid polymer outlet 8. The top of the vacuum separation tower 2 is connected with a cyclone separator 3, the cyclone separator 3 is connected with a filter 4, the filter 4 is connected with a vacuum pump 5, and a collecting tank 7 is arranged under the cyclone separa...

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Abstract

The invention relates to regenerated polymer recycling purification method that includes the following steps: taking high temperature melting liquefaction to regenerated polymer, sending to vacuum separating column, the low molecule impurity would be gasified, discharging the liquid polymer from down port of vacuum separating tower, and the low molecule impurity would be separated from upper part.The invention would gain high purity regenerated polymer. It also supplies the vacuum separating tower.

Description

technical field [0001] The invention relates to a method for recycling and removing impurities of recycled polymers, in particular to a method for separating low-molecular impurities of recycled polymers and a special vacuum separation tower thereof. Background technique [0002] Renewable polymers contain a wide variety of impurities. These impurities must therefore be separated as far as possible when polymer waste is reprocessed. [0003] The existing polymer impurity method is (Chinese utility model patent 200520102415.6): when in a solid state, wash with water to remove impurities of different densities (such as paper, silt, etc.), separate iron filings with a magnet, and wash with a high-temperature alkaline solution to remove oil stains For dirt that is not easy to clean, use a liquid filter to separate solid impurities (such as aluminum flakes, etc.) that have a similar density and are not easy to melt. These methods can effectively separate most of the impurities ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F6/10C08J11/00
Inventor 杜国强
Owner NINGBO DAFA CHEM FIBER