CN112522522A - 一种环保型无氰提金液、制备方法及应用 - Google Patents
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- 239000010931 gold Substances 0.000 title claims abstract description 58
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 54
- 238000000605 extraction Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 44
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 30
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 18
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims abstract description 17
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims abstract description 17
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims abstract description 16
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims abstract description 13
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims abstract 5
- 238000000034 method Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000007885 magnetic separation Methods 0.000 claims description 2
- 238000010297 mechanical methods and process Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 11
- 239000007800 oxidant agent Substances 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 6
- 238000002386 leaching Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000008139 complexing agent Substances 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 abstract description 2
- BDOYKFSQFYNPKF-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;sodium Chemical compound [Na].[Na].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O BDOYKFSQFYNPKF-UHFFFAOYSA-N 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 239000010793 electronic waste Substances 0.000 description 3
- -1 hydrogen ions Chemical class 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- OSVXSBDYLRYLIG-UHFFFAOYSA-N chlorine dioxide Inorganic materials O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000003916 ethylene diamine group Chemical group 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
一种环保型无氰提金液,以重量百分比计,由以下成分制成:乙二胺四乙酸二钠5‑8%,氟化氢铵10‑15%,双氧水10‑12%,过硫酸钠5‑8%,硝酸6‑9%,盐酸7‑10%,余量为水。采用双氧水、过硫酸钠、硝酸来调节浸出液的氧化电势,并将Au氧化成Au+,在氧化剂和酸液的作用下,络合剂乙二胺四乙酸二钠与Au+发生络合反应形成配位离子,金在酸性有强氧化剂条件下,可与乙二胺四乙酸二钠形成稳定络合物,因而起到提取金的效果。
Description
技术领域
本发明属于金属回收和固体废物资源化技术领域,具体涉及一种环保型无氰提金液、制备方法及应用。
背景技术
伴随电子废弃物的持续性高增长,其无害化处理、资源再利用成为急需解决的问题,更是引起了环保工作者的广泛关注。电路板中通常价值最高的是金。瑞典Ronnskar冶炼厂分析了个人计算机电路板中的元素组成,金的含量高达80g/t,高于一般金矿石中的金品位。
目前,我国主要釆取高炉焚烧和酸解氰化浸出等环境负担严重的简单处理方法来回收金属,不仅造成大气、水、土壤等严重污染,危害人体健康,而且回收产品的价值低。
还有采用氯化法提金,氯化法是通过氯气或氯酸钠在酸性介质中的强氧化性氧化浸出阳极泥中的金,再用二氧化硫、草酸或氯化亚铁等还原沉金。该方法要用到氯气和二氧化硫,容易造成环境污染。
中国专利201510344712.X公开了一种从废旧线路板中提取金属银的方法,将废旧线路板粉碎成碎料后,置于浸出反应器的由络合剂和氧化剂构成的提取液中进行选择性浸出反应,所得浸出液中加入铜片进行置换反应,得到金属银。本发明工艺简单、成本低廉,使得线路板中的金属银可以选择性络合浸出,避免了强酸的使用,实现了废旧线路板中金属银的绿色资源化处理。所述的络合剂为乙二胺、乙二胺四乙酸或乙二胺四乙酸二钠。所述氧化剂为双氧水、次氯酸钠或氯酸钾。此发明专利使用的氧化剂为次氯酸钠或氯酸钾,容易分解产生氯气,是一种有毒有害气体。
基于电路板中具有相对较高的含金量和回收价值,有必要开发一种从废弃电路板中提取金的工艺方法,以期建立高效、环保、实用的提金工艺,实现从废弃电路板中提取金。
发明内容
本发明的目的在于提供一种环保型无氰提金液、制备方法及应用,该无氰提金液高效、环保、实用,实现从废弃电路板中提取金。
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠5-8%
氟化氢铵10-15%
双氧水10-12%
过硫酸钠5-8%
硝酸6-9%
盐酸7-10%
水余量。
所述双氧水的质量百分比浓度为30-35%。
优选的,本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠5%
氟化氢铵12%
双氧水10%
过硫酸钠7%
硝酸8%
盐酸9%
水余量。
所述双氧水的质量百分比浓度为30-35%。
本发明环保型无氰提金液的制备方法如下:
将乙二胺四乙酸二钠,氟化氢铵,双氧水,过硫酸钠,硝酸,盐酸和水按量共混。
本发明环保型无氰提金液的提金机理如下:氧化剂(双氧水、过硫酸钠、硝酸)主要用来调节浸出液的氧化电势,并将Au氧化成Au+。在氧化剂和酸液的作用下,络合剂乙二胺四乙酸二钠与Au+发生络合反应形成配位离子。金在酸性有强氧化剂条件下,可与乙二胺四乙酸二钠形成稳定络合物。在有硝酸存在情况下,双氧水和过硫酸钠氧化性变强。
本发明需要同时使用硝酸和盐酸,如果只用硝酸(溶液中氢离子的量与两种酸合用相同),意味着无氯离子存在在溶液中,溶液渗透力不够,电路板上金元素去除力不够,造成提金率下降,只能达到45%左右;如果只用盐酸(溶液中氢离子的量与两种酸合用相同),双氧水和过硫酸钠氧化性不够,金原子无法被氧化成金离子进入溶液,提金率只能达到42%左右。
本发明环保型无氰提金液的使用方法如下:
(1)将废弃电路板人工拆卸需要提金的元器件;
(2)然后将其采用机械法破碎、粉碎;
(3)采用电选、磁选法选出需要提金的原料;
(4)用提金液浸透需要提金的原料,保证提金原料浸泡充足即可;
(5)然后用过量锌粉置换,过滤即可得到金粉。
具体实施方式
以人工镀金件为原料,其含金量为:0.5g/kg,所用双氧水的质量百分比浓度为35%。
实施例1
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠5%
氟化氢铵12%
双氧水10%
过硫酸钠7%
硝酸8%
盐酸9%
水余量。
实施例2
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠8%
氟化氢铵13%
双氧水10%
过硫酸钠7%
硝酸8%
盐酸9%
水余量。
对比例1
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠0%
氟化氢铵12%
双氧水10%
过硫酸钠7%
硝酸8%
盐酸9%
水余量。
对比例2
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠5%
氟化氢铵12%
双氧水0%
过硫酸钠7%
硝酸8%
盐酸9%
水余量。
对比例3
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠5%
氟化氢铵12%
双氧水10%
过硫酸钠0%
硝酸8%
盐酸9%
水余量。
对比例4
本发明环保型无氰提金液,以质量百分比计,由以下成分制成:
乙二胺四乙酸二钠6%
氟化氢铵12%
双氧水11%
过硫酸钠7%
硝酸0%
盐酸8%
水余量。
以上实施例与对比例的测试结果如下:
测试项目 | 实施例1 | 实施例2 | 对比例1 | 对比例2 | 对比例3 | 对比例4 |
金的浸出率 | 0.45g/kg | 0.43g/kg | 0.10g/kg | 0.28g/kg | 0.26g/kg | 0.18g/kg |
Claims (6)
1.一种环保型无氰提金液,其特征在于,以质量百分比计,由以下成分制成:乙二胺四乙酸二钠5-8%,氟化氢铵10-15%,双氧水10-12%,过硫酸钠5-8%,硝酸6-9%,盐酸7-10%,余量为水。
2.根据权利要求1所述的环保型无氰提金液,其特征在于,以质量百分比计,由以下成分制成:乙二胺四乙酸二钠5%,氟化氢铵12%,双氧水10%,过硫酸钠7%,硝酸8%,盐酸9%,余量为水。
3.根据权利要求1所述的环保型无氰提金液,其特征在于,所述双氧水的质量百分比浓度为30-35%。
4.根据权利要求1所述环保型无氰提金液的制备方法,其特征在于,依次包括如下步骤:将乙二胺四乙酸二钠,氟化氢铵,双氧水,过硫酸钠,硝酸,盐酸,和水按量共混。
5.权利要求1所述环保型无氰提金液在金回收中的应用。
6.根据权利要求5所述环保型无氰提金液在金回收中的应用,所述无氰提金液的使用方法如下:
(1)将废弃电路板人工拆卸需要提金的元器件;
(2)然后将其采用机械法破碎、粉碎;
(3)采用电选、磁选法选出需要提金的原料;
(4)用提金液浸透需要提金的原料,保证提金原料浸泡充足即可;
(5)然后用过量锌粉置换,过滤即可得到金粉。
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CN101230421A (zh) * | 2007-12-26 | 2008-07-30 | 东华大学 | 一种从废电路板中提金的方法 |
CN105969990A (zh) * | 2016-06-20 | 2016-09-28 | 昆山鸿福泰环保科技有限公司 | 一种利用活性炭法吸附回收金方法 |
DE102015118279A1 (de) * | 2015-10-27 | 2017-04-27 | Max-Planck-Institut Für Eisenforschung GmbH | Verfahren zur Gewinnung von Edelmetallen |
JP2017218650A (ja) * | 2016-06-09 | 2017-12-14 | 三菱マテリアル株式会社 | 金の溶解方法 |
CN111041207A (zh) * | 2019-11-28 | 2020-04-21 | 中国电器科学研究院股份有限公司 | 一种电化学浸金剂及从废旧镀金线路板中回收金的方法 |
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