DISPOSAL METHOD OF WASTE CLOTH CONTAINING POLYESTER AND NYLON

• Main Authors: WONG TZU-HUAN, CHUANG JUNG-JEN, LIAO TEAO
• Format: Patent
• Language: English; Japanese
• Published: 08.05.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

To provide a disposal method of waste cloth that reduces a used amount of a whole acidic solution and/or increases a recycle amount of polyester or nylon.SOLUTION: A disposal method of waste cloth comprises: (a) providing a waste cloth comprising polyester and nylon, (b) performing a first stage treatment comprising an acid treatment of a material to obtain a first liquid material and a first solid material, (c) performing a second stage treatment to a first liquid material to obtain a second liquid material and a second solid material, (d) performing a third stage treatment containing an acid treatment to a first solid material for obtaining a third liquid material, and (e) performing a fourth stage treatment to a third liquid material for obtaining a fourth liquid material and a fourth solid material, wherein an acid concentration of the second liquid material is lower than the acid concentration of the first liquid material, and the acid concentration of the fourth liquid material is lower than the acid concentration of the third liquid material.SELECTED DRAWING: Figure 1 【課題】酸性液体の全体の使用量を低減する及び／又はポリエステル及び／又はナイロンのリサイクル量を増加させる、ポリエステル及びナイロンを含む廃棄布の処分方法を提供する。【解決手段】ポリエステル及びナイロンを含む廃棄布を提供する工程（ａ）と、第１の液体材料及び第１の固体材料を得るための材料への酸処理を含む第１段階の処理を実施する工程（ｂ）と、第２の液体材料及び第２の固体材料を得るために第１の液体材料に第２段階の処理を実施する工程（ｃ）と、第３の液体材料を得るための第１の固体材料への酸処理を含む第３段階の処理を実施する工程（ｄ）と、第４の液体材料及び第４の固体材料を得るために第３の液体材料に第４段階の処理を実施する工程（ｅ）とを含み、第２の液体材料の酸濃度は第１の液体材料の酸濃度よりも低く、第４の液体材料の酸濃度は第３の液体材料の酸濃度よりも低い。【選択図】図１