Citric acid aluminum-plastic composite packaging material separating agent as well as preparation and application method thereof

Abstract

The invention discloses a citric acid aluminum-plastic composite packaging material separating agent as well as a preparation and an application method thereof, which belongs to the technical field ofseparation of composite materials. The separating agent adopts citric acid as a solute and water as a solvent to prepare a citric acid solution with a concentration of 3 to 6 mol / L, the separating agent aids in the complete separation of the aluminum-plastic composite packaging material and is not volatile and is harmless to the atmosphere and human body, the separation of the aluminum-plastic composite packaging material is realized, and the technical problems that the existing separating agent is high in volatility and harmful to the human body and the atmosphere can be solved. The preparation method comprises the following steps: dissolving the citric acid in the water at 85 to 95 DEG C, wherein the method is simple, and the operation is convenient. The application method comprises thefollowing steps: (1) placing the aluminum-plastic composite packaging material into the separating agent; and (2) oscillating at a constant temperature of 85 to 95 DEG C until the aluminum-plastic composite packaging material is separated into aluminum and plastics. In the application process, no irritating volatile substance is generated, the application temperature range of the separating agentis wide, and the aluminum-plastic separating effect is good.

Description

technical field [0001] The invention belongs to the technical field of composite material separation, and in particular relates to a citrate-aluminum-plastic composite packaging material separation agent and a preparation and use method thereof. Background technique [0002] Aluminum-plastic composite packaging material is a multi-layer material composed of aluminum foil and plastic. Because of its excellent light-proof, gas-blocking and anti-corrosion properties, it is widely used in the packaging of food, cosmetics and daily necessities. However, at present, the main methods of recycling aluminum-plastic composite packaging materials in my country are landfill and incineration. When landfilling, aluminum foil will cause soil heavy metal pollution, plastic degradation is difficult, will destroy the soil geology of the area, and affect the ecological balance; and aluminum-plastic composite materials are prone to produce dioxin gas when incinerated, which is carcinogenic to t...

AI Technical Summary

Problems solved by technology

The separating agent realizes the separation of aluminum-plastic composite packaging materials, and solves the technical problem that the existing separating agent is highly volatile and causes harm to the human body and the atmosphere; the preparation method is simple and the operation is convenient; the separating agent has no irritating volatile substances during use Formation, the separation agent has a wide temperature range, and the aluminum-plastic separation effect is good

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