Method of recovering platinum in waste fuel cell

A fuel cell and waste technology, which is applied in the direction of fuel cell, fuel cell disposal/recycling, battery recycling, etc., can solve problems such as the impact of wastewater treatment, achieve good social and economic benefits, have good energy saving and environmental protection effects, and avoid secondary pollution Effect

Inactive Publication Date: 2017-06-06
DONGGUAN ZUOYOU ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strong acids such as nitric acid or aqua regia are used in the existing platinum immersion technology, which has a great impact on the operating environment and wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 This embodiment discloses a method for utilizing iodized salt to recover platinum in waste fuel cells, and the specific steps are as follows:

[0023] The 2000W waste fuel cell components are mechanically disassembled, crushed and sorted to obtain stainless steel frames, plastics, graphite bipolar plates and catalyst platinum;

[0024] The crushed bipolar plate is ultrasonically cleaned with an organic solvent to remove organic impurities on the surface of the bipolar plate; the organic solvent is acetone.

[0025] Pyrolyzing the crushed membrane electrode at a temperature of 450°C to remove the proton exchange membrane; ultrasonically cleaning the pyrolyzed residue to remove organic impurities to obtain the material to be treated; then Use potassium iodide-iodine mixed solution (wherein the concentration of potassium iodide is 4M, and the concentration of iodine is 5mM), at a temperature of 90°C, the pyrolysis residue is stirred and soaked for 5 hours, whe...

Embodiment 2

[0026] Embodiment 2 This embodiment discloses a method for utilizing iodized salt to recover platinum in waste fuel cells, the specific steps are as follows:

[0027] The 2500W waste fuel cell components are mechanically disassembled, crushed and sorted to obtain stainless steel frames, plastics, graphite bipolar plates and catalyst platinum;

[0028] Ultrasonic cleaning is performed on the crushed bipolar plate with an organic solvent to remove organic impurities on the surface of the bipolar plate; the organic solvent is ethanol.

[0029] Pyrolyzing the crushed membrane electrode at a temperature of 300°C to remove the proton exchange membrane; ultrasonically cleaning the pyrolyzed residue to remove organic impurities to obtain the material to be treated; then Use potassium iodide-iodine mixed solution (wherein the concentration of potassium iodide is 2M, and the concentration of iodine is 7mM), at a temperature of 95°C, the pyrolysis residue is stirred and soaked for 0.5 ho...

Embodiment 3

[0030] Embodiment 3 This embodiment discloses a method for utilizing iodized salt to recover platinum in waste fuel cells, and the specific steps are as follows:

[0031] The 2000W waste fuel cell components are mechanically disassembled, crushed and sorted to obtain stainless steel frames, plastics, graphite bipolar plates and catalyst platinum;

[0032] The crushed bipolar plate is ultrasonically cleaned with an organic solvent to remove organic impurities on the surface of the bipolar plate; the organic solvent is ethylene glycol.

[0033] Pyrolyzing the crushed membrane electrode at a temperature of 550°C to remove the proton exchange membrane; ultrasonically cleaning the pyrolyzed residue to remove organic impurities to obtain the material to be treated; then Use potassium iodide-iodine mixed solution (wherein the concentration of potassium iodide is 6M, the concentration of iodine is 3mM), at the temperature of 35 ℃, the pyrolysis residue is stirred and soaked for 10 hou...

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PUM

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Abstract

The invention belongs to the technical field of material recovery and particularly relates to a method of recovering platinum in a waste fuel cell. The method comprises the following steps: a, taking the waste fuel cell; b, separating a bipolar plate and a membrane electrode of the fuel cell, and carrying out crushing treatment on the bipolar plate and the membrane electrode respectively; c, ultrasonically cleaning the bipolar plate subjected to the crushing treatment with an organic solvent, and removing organic impurities on the surface of the bipolar plate; and d, pyrolyzing and cleaning the membrane electrode subjected to the crushing treatment, and then soaking pyrolysis residues with the organic solvent to obtain the recovered platinum. The method can effectively carry out recycling treatment on valuable components of the waste fuel cell to recycle the valuable components, simplifies a processing technology, prevents secondary pollution in the treatment process, is good in energy saving and environmental friendly effect and has better social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of material recovery, and in particular relates to a method for recovering platinum in waste fuel cells by using iodized salt. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy present in fuel and oxidant into electrical energy. Fuel and air are sent separately to the fuel cell, and electricity is miraculously produced. It looks like a battery with positive and negative electrodes and electrolytes from the outside, but in essence it cannot "storage electricity" but a "power plant". However, it requires electrodes and electrolytes and redox reactions to generate electricity. Toyota Motor established the "EV Business Planning Office" on December 1, and is accelerating mass production of pure electric vehicles (EV). Toyota successfully mass-produced a hybrid vehicle (HV) for the first time in the world, and positioned a hydrogen-burning fuel cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/00C22B11/00C22B7/00
CPCC22B7/006C22B11/046C22B11/048H01M8/008Y02P10/20Y02W30/84
Inventor 张晓飞苏冠贤
Owner DONGGUAN ZUOYOU ELECTRONICS TECH CO LTD
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