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1. CN111826177 - Method for recycling fluorescent powder rare earth from waste light-emitting diode packaging material in cooperation with pyrolysis treatment

Office
China
Application Number 202010662003.7
Application Date 10.07.2020
Publication Number 111826177
Publication Date 27.10.2020
Grant Number 111826177
Grant Date 13.08.2021
Publication Kind B
IPC
C10B 53/00
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
53Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
C10B 57/00
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
57Other carbonising or coking processes; Features of destructive distillation processes in general
C22B 7/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
7Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
C22B 59/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
59Obtaining rare earth metals
CPC
C10B 53/00
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
53Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
C10B 57/00
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
57Other processes not covered before; Features of destructive distillation processes in general
C22B 7/007
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
7Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; ; Methods of a general interest or applied to the winning of more than two metals
006Wet processes
007by acid leaching
C22B 59/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
59Obtaining rare earth metals
Y02P 10/20
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
20Recycling
Applicants BEIJING UNIVERSITY OF TECHNOLOGY
北京工业大学
ADVANCED CORPORATION FOR MATERIALS & EQUIPMENTS CO., LTD.
湖南顶立科技有限公司
Inventors WU YUFENG
吴玉锋
ZHANG SHUHAO
张书豪
DAI YU
戴煜
ZHOU QIANG
周强
ZHANG QIJUN
章启军
WANG WEI
王维
Agents 北京思海天达知识产权代理有限公司 11203
Title
(EN) Method for recycling fluorescent powder rare earth from waste light-emitting diode packaging material in cooperation with pyrolysis treatment
(ZH) 一种废弃发光二极管封装材料热解处理协同荧光粉稀土回收方法
Abstract
(EN) The invention discloses a method for recycling fluorescent powder rare earth from a waste light-emitting diode packaging material in cooperation with pyrolysis treatment. The method is based on pyrolysis characteristics of organic polymer compounds, organic polymer substances in the light-emitting diode are catalytically pyrolyzed, carbon in pyrolysis residue is converted into water gas, efficientdisassembly of the light-emitting diode is achieved, the problems that components of the light-emitting diode are mixed, rare earth elements in fluorescent powder are difficult to recover and the like in a traditional mechanical disassembly method are solved, generated pyrolysis gas and water gas can continuously supply energy to a pyrolysis system, heat in flue gas is recovered, and energy is saved; meanwhile, based on a chemical dissolution reaction mechanism of the fluorescent powder, the rare earth elements in the waste light-emitting diode fluorescent powder are efficiently recycled by adopting an alkali fusion-acid leaching combined process, so that the gradient leaching of the rare earth elements in the waste light-emitting diode fluorescent powder can be realized, rare earth oxalate can be precipitated and recovered, and the difficulty of later separation and purification is greatly reduced.
(ZH) 本发明公开了一种废弃发光二极管封装材料热解处理协同荧光粉稀土回收方法。基于有机高分子化合物的热解特性,催化热解发光二极管中有机高分子物质,并将热解残渣中的碳转化为水煤气,实现发光二极管的高效拆解,解决了传统机械拆解方法存在发光二极管组分混杂、荧光粉中稀土元素回收困难等问题,生成的热解气和水煤气可为热解系统持续供能,并回收烟气中的热量,节约能源;同时,基于荧光粉的化学溶解反应机理,采用碱熔‑酸浸联合工艺高效回收废弃发光二极管荧光粉中稀土元素,可实现废弃发光二极管荧光粉中稀土元素的梯次浸出,沉淀回收稀土草酸盐,大大降低后期分离提纯的难度。
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