Successive separation method of aluminum-plastic composite packaging materials and device thereof

A packaging material, aluminum-plastic composite technology, applied in the direction of plastic recycling, recycling technology, process efficiency improvement, etc., can solve the problems of fuel energy consumption, low utilization value, gas emissions such as flue gas, etc. Cost saving and high separation efficiency

Inactive Publication Date: 2011-10-05
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that there must be a certain amount of fuel energy consumption in the pyrolysis process; the second is that it will produce CO 2 , flue gas and other gas emissions; the third is that the separated plastic can only be used in the form of heat energy, and the use value is low
However, since each link described in this technology is an independent batch-sequential equipment, there is no continuous process flow, which cannot meet the needs of industrial continuous production

Method used

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  • Successive separation method of aluminum-plastic composite packaging materials and device thereof
  • Successive separation method of aluminum-plastic composite packaging materials and device thereof
  • Successive separation method of aluminum-plastic composite packaging materials and device thereof

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Embodiment Construction

[0043] Below in conjunction with accompanying drawing and example describe in detail.

[0044] refer to figure 1 Shown, relevant specific implementation steps of the present invention are as follows:

[0045] A) Soaking and stripping: the aluminum-plastic composite packaging material is continuously placed in the soaking separator 1, which contains a stripping agent prepared with formic acid, the concentration of which is 4mol / L, and can be adjusted by supplementing nitric acid The pH value was kept at 1-2 to ensure the reaction. The reaction temperature was maintained at 60° C. by the jacket of the immersion separator 1 to shorten the immersion separation time. The aluminum-plastic composite packaging material is soaked in the stripping agent while being stirred and advanced with the feeding screw device 12, and is continuously sent to the continuous centrifugal dryer 2 by the discharging screw device 13. To achieve continuous reaction. The residence time of the aluminum-...

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Abstract

A successive separation method of aluminum-plastic composite packaging materials comprises the following steps of: A) immersing the aluminum-plastic composite packaging materials in a formic acid remover, wherein the formic acid concentration of the formic acid remover is 2-6 mol/L; B) drying the separated aluminium foils and plastic to remove the residual remover; C) centrifuging and sifting thedried aluminium foils and plastic to spall and separate the plastic and aluminium foils, followed by collecting the plastic and aluminium foils. The invention also provides a device to accomplish theabove method. The method provided by the invention accomplishes the purpose of successive feeding and successive discharging with high separation efficiency and high separation speed, saves costs andis of economic and valid industrial value.

Description

technical field [0001] The invention belongs to the technical field of resource regeneration and utilization. [0002] Specifically, the invention relates to a method for continuous and rapid separation of plastic-aluminum composite packaging materials. [0003] The invention also relates to a device for carrying out the method described above. Background technique [0004] Plastic-aluminum composite packaging material is a packaging material composed of aluminum foil and plastic after the paper-plastic-aluminum composite packaging waste is shredded and separated from the paper base. The main components are 80% polyethylene plastic (LDPE) and 20% aluminum. . Plastic-aluminum composite packaging materials are rarely used alone, and are generally used after being composited with paper fibers. The most widely used packaging is milk and soft drink packaging. Typical products are Tetra Pak produced by Tetra Pak, Combibloc produced by Combi and top boxes produced by Internation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/06C22B21/00
CPCY02P10/20Y02W30/62
Inventor 李丽王琪闫大海刘玉强黄泽春黄启飞谢明辉杨子良羊军
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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