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Method for separating paper plastic-aluminum composite packing waste

A separation method and aluminum composite technology, which is applied to the separation agent of paper-plastic-aluminum composite packaging waste and the separation field of paper-plastic-aluminum composite packaging waste, can solve the problems of high construction and operation costs, low utilization value, and difficulty in plastic materials, etc. problems, to achieve the effect of promoting recycling, increasing the value of recycling and recycling, and reducing pollution

Inactive Publication Date: 2010-11-24
CHINESE RES ACAD OF ENVIRONMENTAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages: First, there must be a certain amount of fuel energy consumption and the resulting CO generated during the pyrolysis process. 2 , flue gas and other gas emissions; the second is that only aluminum foil can be recycled for aluminum-plastic composite materials treated by this method, and the separated plastics are difficult to recycle, and can only be used in the form of heat energy, and the utilization value is not high.
However, the disadvantage of this technology is that the construction and operation costs are too high, and it is difficult to promote

Method used

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  • Method for separating paper plastic-aluminum composite packing waste
  • Method for separating paper plastic-aluminum composite packing waste
  • Method for separating paper plastic-aluminum composite packing waste

Examples

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Embodiment 1

[0050] 1) Crushing treatment - the aluminum-plastic screen slag is mechanically crushed through a crushing device. Use a crusher with a screen aperture of 10cm to reduce the particle size of the waste, make the waste texture uniform, and facilitate subsequent treatment and disposal; this can increase the specific surface area of ​​the material in the subsequent soaking and peeling reaction, making the waste The contact area between it and the separating agent increases, which makes it easier to peel off the materials of each layer; at the same time, it is convenient for feeding and discharging, and prevents the pipeline from being blocked.

[0051] 2) Preparation of separation agent - prepare a formic acid solution with a concentration of 3-5mol / L as a separation agent, and maintain the temperature at 40-60°C.

[0052] 3) Soaking and peeling reaction - put the crushed aluminum-plastic sieves in the reaction tank and soak them in the separating agent, preferably with a liquid-s...

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Abstract

The invention discloses a method for separating a paper plastic-aluminum composite packing waste. The method comprises the main steps of: A) crushing aluminum plastic and putting the crushed aluminum plastic into a separating agent which is 3 to 5mol / L formic acid solution, and soaking the aluminum plastic at the temperature of between 40 and 60 DEG C with stirring till the aluminum foil and the plastic are separated; B) removing the separating agent from the aluminum foil and the plastic; C) putting the aluminum foil and the plastic into a stirring roller screen device to separate the aluminum foil and the plastic; D) rinsing the aluminum foil and the plastic by using water respectively to remove the residual separating agent; and E) drying the aluminum foil and the plastic. The method eliminates pollution and energy loss produced by purely filling and burning the paper plastic-aluminum composite packing waste; and meanwhile, because the aluminum foil and the plastic can be recycled respectively, the method reduces the development of new energy and materials and saves resources.

Description

technical field [0001] The invention belongs to the technical field of packaging waste recycling. In detail, the present invention relates to a method for separating paper-plastic-aluminum composite packaging waste, in particular to a separating agent for paper-plastic-aluminum composite packaging waste and the conditions for using the separating agent. Background technique [0002] Paper-plastic-aluminum composite packaging is a six-layer paper-based composite packaging made of paper, aluminum, and plastic. The main component is 75% high-quality pulp, and it also contains 16% polyethylene plastic (LDPE) and 4% aluminum. The more typical products are Tetra Pak produced by Tetra Pak, Combibloc produced by Combi and the roof box produced by International Paper. A sterile environment that blocks light, oxygen, and moisture. Taking Tetra Pak as an example, the first layer from the outside to the inside is a polyethylene layer, which protects the graphic information on the surf...

Claims

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Application Information

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IPC IPC(8): C08J11/08C08L23/06
CPCY02W30/62
Inventor 李丽王琪闫大海刘玉强黄泽春黄启飞杨子良张冀飞羊军
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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