METHOD FOR PROCESSING FLUORINE-CONTAINING ELECTROLYTE

• Main Authors: FUJISAWA RYUTARO, HIRATA KOICHIRO, HAYASHI HIROSHI, TSURUMAKI HIDENORI
• Format: Patent
• Language: English; Japanese
• Published: 14.05.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method for safely processing an electrolyte including a fluorine compound and an organic solvent.SOLUTION: A method for processing a fluorine-containing electrolyte comprises the steps of: adding alkaline to the fluorine-containing electrolyte, thereby hydrolyzing carbonic ester included in the fluorine-containing electrolyte; evaporating volatile components included in the fluorine-containing electrolyte by heating the fluorine-containing electrolyte after fixing fluorine and phosphorus included in the fluorine-containing electrolyte; and collecting organic solvent components from an evaporated gas resulting from the evaporation of the volatile components. The method further comprises e.g. the step of charging an alkaline into a waste battery, or the step of immersing a waste battery in an alkali solution, or a combination of the steps of cutting or fracturing a waste battery and adding alkali powder or alkali solution; and the step of thereafter, evaporating the volatile components by heating to collect alcohol, diol, etc. included in the evaporated gas. 【課題】フッ素化合物および有機溶媒を含む電解液を安全に処理する方法を提供する。【解決手段】フッ素含有電解液にアルカリを添加して前記フッ素含有電解液に含まれる炭酸エステルを加水分解すると共に、前記フッ素含有電解液に含まれるフッ素およびリンを固定した後に、前記フッ素含有電解液を加熱して前記フッ素含有電解液に含まれる揮発成分を気化し、前記揮発成分が気化した気化ガスから有機溶媒成分を回収することを特徴とするフッ素含有電解液の処理方法であり、例えば、廃電池にアルカリを注入し、あるいは廃電池をアルカリ溶液に浸漬し、あるいは廃電池を切断または破砕して粉末アルカリあるいはアルカリ溶液を加えた後に、加熱して揮発成分を気化し、気化ガスに含まれるアルコールやジオールを回収する処理方法。【選択図】図１