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A method for recycling waste polyurethane foam and its application

A polyurethane foam and carbon material technology, applied in the field of polyurethane foam, can solve problems such as difficult industrialization and complicated processes, and achieve good cycle stability, high specific capacity, and simple and direct methods

Active Publication Date: 2021-09-07
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are all chemical cracking methods, the process is relatively complicated, and it is difficult to realize industrialization

Method used

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  • A method for recycling waste polyurethane foam and its application
  • A method for recycling waste polyurethane foam and its application
  • A method for recycling waste polyurethane foam and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Using waste polyurethane rigid foam as raw material, it was soaked in ethanol and ultrasonically cleaned to remove mechanical impurities without other pretreatment. It is first cut into a fixed shape suitable for the size of the tube furnace, and its mass is said to be 200 mg. Put the waste polyurethane foam in a porcelain boat, place the porcelain boat in a tube furnace, and heat it at 5°C min under a nitrogen protective atmosphere. -1 The heating rate (i.e. the heating rate of the low-temperature section) was raised to 400°C (i.e. the temperature of the low-temperature section) and calcined for 2 hours (i.e. the constant temperature time of the low-temperature section), and the temperature was naturally cooled to room temperature to obtain a pre-carbonized carbon material;

[0059] Then, under the protection of nitrogen, continue at 6°C·min -1 The heating rate (that is, the heating rate of the high temperature section) is raised to 1000°C (ie, the temperature of the ...

Embodiment 2-4

[0062] The raw material of embodiment 2-4 is consistent with embodiment 1. The difference lies in the heating rate of the low temperature section, the temperature of the low temperature section, the constant temperature time of the low temperature section, the heating rate of the high temperature section, the temperature of the high temperature section and the constant temperature time of the high temperature section, see Table 1 for details.

Embodiment 5-11

[0063] Embodiment 5-11 (comparison)

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Abstract

The invention provides a method for recycling waste polyurethane foam and its application. The method for recycling waste polyurethane foam has the characteristics of simplicity and directness, and the obtained carbon material matrix can be directly or indirectly applied to electrode materials. The method for recycling waste polyurethane foam includes the following steps: 1) pre-carbonization treatment: under the protection of an inert gas, the waste polyurethane foam material is heated to 350-500°C, calcined for 0.5-24h, and then cooled to room temperature to obtain a pre- Carbonized carbon material; 2) Carbonization treatment: under the protection of inert gas, the pre-carbonized carbon material obtained in step 1) is heated to 800-1600° C., and calcined for 0.5-24 hours to obtain a carbon material matrix.

Description

technical field [0001] The invention belongs to the technical field of polyurethane foam, in particular to a method for recycling waste polyurethane foam. Background technique [0002] The development of polyurethane has a history of nearly 70 years. In terms of the application breadth of polyurethane, it has leapt to the top of all synthetic materials. The consumption of polyurethane in the world basically doubles every ten years, and most of them are foamed plastics. But at the same time, factories producing polyurethane foam produce a large amount of scrap, mold overflow, waste products, and waste in various application fields of polyurethane foam every year, such as old polyurethane foam in scrapped cars, which also need to be disposed of. The recycling of waste plastics can not only reduce environmental pollution, but also reduce the production cost of new products, which has good social and economic benefits. [0003] Generally speaking, the recycling of polyurethane ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 宋阔庞德政李雅迪陈丁丁高博
Owner WANHUA CHEM GRP CO LTD
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