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Process for recovering waste polycarbonate (PC) material

A waste and process technology, applied in the recycling process field of waste polycarbonate (PC) materials, can solve the problems of high energy consumption, low product added value, complex plastic recycling process, etc., and achieve good results, save solvent consumption, dissolve fast effect

Active Publication Date: 2013-02-06
SHUYE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the plastic recycling process in the prior art is complicated, the energy consumption is high, and the added value of the product is low. Through reasonable parameter setting, a product with simple process flow, low energy consumption, and small solvent consumption is provided. Recycling process of waste PC materials with high performance

Method used

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  • Process for recovering waste polycarbonate (PC) material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] The recycling process of waste polycarbonate materials in this embodiment includes the following steps:

[0038] (1) Collect waste polycarbonate bottles, add them to a pulverizer, and pulverize to obtain waste particles with a particle size of 1-1.5 cm;

[0039] (2) At room temperature, put the waste particles into a closed container with dichloromethane and stir for 30 minutes to quickly dissolve the waste particles to form a homogeneous solution. During the stirring process, control the waste particles and the dichloromethane The temperature of the mixed solution does not exceed 35°C, and the weight ratio of methylene chloride to waste particles in this step is 1:10;

[0040] (3) Activated carbon is added to the homogeneous solution to adsorb the waste gas generated in the process of dissolving the pigment and waste particles in the homogeneous solution. After stirring for 20 minutes, stand still to obtain a stationary liquid, as described in this step The weight ratio of a...

Embodiment 2

[0046] (1) Collect waste polycarbonate bottles, add them to a pulverizer, and pulverize to obtain waste particles with a particle size of 1.5 cm;

[0047] (2) At room temperature, put the waste particles into a closed container with dichloromethane and stir for 25 minutes to quickly dissolve the waste particles to form a homogeneous solution. During the stirring process, control the waste particles and the dichloromethane The temperature of the mixed solution does not exceed 35°C, and the weight ratio of methylene chloride to waste particles in this step is 1:9;

[0048] (3) Add activated carbon to the homogeneous solution to absorb the waste gas generated during the dissolution of pigments and waste particles in the homogeneous solution. After stirring for 18 minutes, stand still to obtain a standing liquid, as described in this step The weight ratio of activated carbon to waste particles is 1:70;

[0049] (4) Add the standing liquid to the first filter with 380 mesh holes and filt...

Embodiment 3

[0055] (1) Collect the waste polycarbonate film, add it to the pulverizer, and pulverize to obtain waste particles with a particle size of 1-1.5 cm;

[0056] (2) At room temperature, put the waste particles into a closed container with dichloromethane and stir for 35 minutes to quickly dissolve the waste particles to form a homogeneous solution. During the stirring process, control the waste particles and the dichloromethane The temperature of the mixed solution does not exceed 35°C, and the weight ratio of methylene chloride to waste particles in this step is 1:12;

[0057] (3) Add activated carbon to the homogeneous solution to absorb the waste gas generated during the dissolution of pigments and waste particles in the homogeneous solution. After stirring for 15 minutes, let it stand to obtain a stationary liquid, as described in this step The weight ratio of activated carbon to waste particles is 1:200;

[0058] (4) Add the standing liquid to the first filter with 450 mesh holes ...

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Abstract

The invention discloses a process for recovering a waste polycarbonate (PC) material. The process is characterized by comprising the following steps of: crushing the waste PC material, dissolving the crushed PC material ion into an organic solvent to form a homogeneous solution; and adding an adsorbent into the homogeneous solution, discoloring and removing insoluble substances, and sequentially filtering and crystallizing to obtain the required crystallized PC material. According to the process for recovering the waste PC material, the recycled polyester intrinsic viscosity control technology, the crystallization technology and the impurity removal technology are realized, water is not required to be added in the whole process, the wastewater discharge is avoided, and the environmental pollution is reduced. The intrinsic viscosity of the recycled PC product reaches 0.77dL / g, the purity is 99.5 percent, and the recovered material reaches a novel level.

Description

Technical field [0001] The invention relates to a recycling process of waste plastics, in particular to a recycling process of waste polycarbonate (PC) materials. Background technique [0002] Polycarbonate (PC) is a general term for a class of polymer compounds with a carbonate structure in the molecular chain and various materials made based on it. Because of its colorless, transparent and excellent impact resistance, it is widely used in automobiles Manufacturing, medical equipment, aerospace, packaging, electronic appliances, optical lenses and other industries. With the rapid development of my country’s polyester industry, the production and demand for PC materials are increasing. At the same time, the amount of waste polycarbonate materials produced is also increasing, although these waste polycarbonate PC materials It is not very toxic, because it is bulky and difficult to degrade under natural conditions, so it not only has a great impact on the environment, but also caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08C08L69/00
CPCY02W30/62
Inventor 林树光
Owner SHUYE ENVIRONMENTAL TECH CO LTD
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