KR20020011661A - The method of synchronous manufacturing for copper sulfate and zing chloride - Google Patents

The method of synchronous manufacturing for copper sulfate and zing chloride Download PDF

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KR20020011661A
KR20020011661A KR1020000045077A KR20000045077A KR20020011661A KR 20020011661 A KR20020011661 A KR 20020011661A KR 1020000045077 A KR1020000045077 A KR 1020000045077A KR 20000045077 A KR20000045077 A KR 20000045077A KR 20020011661 A KR20020011661 A KR 20020011661A
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copper
copper sulfate
chloride
alcohol
solution
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KR1020000045077A
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Korean (ko)
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김수태
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문상우
김수태
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G9/00—Compounds of zinc
    • C01G9/04—Halides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G3/00—Compounds of copper
    • C01G3/10—Sulfates
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE: Provided is a simultaneous preparation method of copper sulfate(CuSO4) and zinc chloride(ZnCl2) from liquid waste(CuCl2) for corrosion of printed circuit boards(PCB). The method is characterized in that (CuCl2+ZnSO4) solution, being obtained by adding ZnSO4 to liquid waste, is mixed with alcohol and cooled for separation of CuSO4 and ZnCl2 due to metathesis. CONSTITUTION: The simultaneous preparation method is as follows; adding CuO to PCB liquid waste(CuCl2) to adjust pH of the solution between 3-4; adding ZnSO4 to be CuCl2/ZnSO4 in an equivalent of 1:1 and dissolving completely; adding 10-30vol.% of alcohol such as methyl or ethyl alcohol; cooling between -10 and -15deg.C to get CuSO4·5H2O crystals and ZnCl2 solution due to the solubility of CuSO4 lower than ZnCl2.

Description

황산동과 염화아연을 동시에 제조하는 방법{The method of synchronous manufacturing for copper sulfate and zing chloride}The method of synchronous manufacturing for copper sulfate and zing chloride}

본 발명은 전자회로기판 부식용 폐액으로부터 황산동과 염화아연을 분리하여 황산동과 염화아연을 동시에 제조하는 방법에 관한 것이다.The present invention relates to a method for simultaneously producing copper sulfate and zinc chloride by separating copper sulfate and zinc chloride from waste liquid for electronic circuit board corrosion.

근년에 전자산업 발달로 회로기판 부식용폐액(PCB)인 염화동 액체가 대량발생하여 여러가지 문제를 야기하고 있다.In recent years, due to the development of the electronics industry, a large amount of copper chloride liquid, which is a PCB corrosion solution, causes various problems.

본 발명은 이에 즈음하여 상기 폐액을 효율적으로 처리하여 유용한 제품을 만들기 위해 꾸준히 연구한 결과 황산동 및 염화아연을 분리하므로서 황산동과 염화아연을 동시 제조하는데 성공하였다.The present invention has succeeded in simultaneously producing copper sulfate and zinc chloride by separating copper sulfate and zinc chloride as a result of steadily researched to make a useful product by treating the waste solution efficiently.

황산동은 재래적으로는 염화동폐액(PCB)을 가다스라이닝탱크(GL탱크)에 넣고 농황산을 첨가하여, 가열 농축하고 발생하는 염산을 냉각 회수하여 제품으로 하고 잔류하는 황산동을 회수하여 재결정시켜 황산동을 제조하는 방법이 있고,Copper sulfate is conventionally put copper chloride waste liquid (PCB) in a gas lining tank (GL tank), concentrated sulfuric acid is added, it is concentrated by heating and cooling the generated hydrochloric acid as a product, and the remaining copper sulfate is recovered and recrystallized to recover copper sulfate. There is a method of manufacturing

또, 다른 방법은 PCB용액에 가성소다를 투입하여 산화동, CuO와 염화나트륨을 생산하여 NaCl로 수세하고 정제된 산화동을 묽은 황산에 가하여 황산동을 제조하는 방법이 있으며Another method is to prepare copper sulfate by adding caustic soda to PCB solution, producing copper oxide, CuO and sodium chloride, washing with NaCl, and adding purified copper oxide to dilute sulfuric acid.

또는 PCB용액에 탄산 소다 및 탄산칼슘을 첨가하여 탄산동 또는 염기성 탄산동을 제조하여 염을 수세한 후, 탄산동을 정제하고 탄산동에 묽은 황산을 가해서 황산동을 제조하여 결정 탈수해서 황산동을 제조하는 방법등이 알려져 있다.Alternatively, sodium carbonate and calcium carbonate are added to the PCB solution to prepare copper carbonate or basic copper carbonate, followed by washing with salt. The copper carbonate is purified, diluted sulfuric acid is added to copper carbonate to prepare copper sulfate, and crystallization is performed to prepare copper sulfate. Methods are known.

그리고 염화아연은 재래적으로는 아연재(ZnO)를 염산에 가하여, 염화아연을 제조하는 방법과 금속 아연 및 아연 스크렙등을 이용하여 염산에 용해하여, 염화아연 액체를 만들고 액체를 탈철, 탈중금속 공정을 거쳐서 고순도 염화아연을 제조하는 방법이 알려져 있다.Zinc chloride is conventionally added with zinc material (ZnO) to hydrochloric acid to produce zinc chloride and dissolved in hydrochloric acid using metal zinc and zinc scrub to make zinc chloride liquid, and the liquid is de-ironed and de-healed metal. Processes for producing high purity zinc chloride through processes are known.

그러나 상기 방법들은 제조공정의 문제, 제조상의 재질문제, 공해등의 제조원가가 많이 들고 시설비 투자가 많이드는 등 실시에 부담을 주고 있다.However, the above methods are burdened with implementation, such as manufacturing process problems, manufacturing material problems, high pollution and the like, and high facility cost investment.

본 발명은 상기와 같은 종래의 방법보다 한층 발달된 방법으로써 염화동(PCB) 용액에 산화동(CuO)를 첨가하여, 염화동 용액중에 잔존하는 염산을 중화하여 PH 3~4정도로 조정하고 용액중에 있는 염화동의 분자량을 계산하여 분자량에 해당되는 당량비의 황산아연(ZnSo4)을 주입하여 용해를 하고 황산아연 및 염화동 액체가 완전히 용해된 후에 여기에 메칠알콜(CH3OH) 및 에칠알콜(C2H5OH)을 용액의부피비율로 10~30%를 첨가하여 교반하고, 이 액체를 냉장고에서 냉각하면 용해도가 낮은 황산동이(CuSo4) 먼저 용액중에서 결정되어 분리가 된다.The present invention is a more advanced method than the conventional method as described above by adding copper oxide (CuO) to the copper chloride (PCB) solution, neutralize the hydrochloric acid remaining in the copper chloride solution to adjust the pH to about 3 ~ 4 Calculate the molecular weight and inject zinc sulfate (ZnSo 4 ) in an equivalent ratio corresponding to the molecular weight to dissolve it, and then completely dissolve the zinc sulfate and copper chloride liquid, and then add methyl alcohol (CH 3 OH) and ethyl alcohol (C 2 H 5 OH). ) at a volume ratio of the solution and stirring by the addition of 10 to 30%, when the cooling liquid in the refrigerator is the low solubility of copper sulfate (CuSo 4) it is first determined in a solution separation.

이것은 용액중에서 복분해되는 원리로서 황산동은 염화아연보다 용해도가 낮아서, 결정이 되는데 황산동 5수염 즉, CuSo4 ,5H2o상태로 분리가 된다.This is a principle that the metathesis in a solution of copper sulfate is low in solubility than the zinc chloride, there is a determination is 5 beard i.e., CuSo 4, separated by a copper sulphate 5H 2 o state.

또, 염화아연은 수중 및 알콜용액 중에서 대단히 용해도가 크고 비결정되는 성질이 있어 황산동결정이 된 용액중에 잔존하는 것이다.In addition, zinc chloride is very soluble and amorphous in water and alcoholic solution, and remains in a solution of copper sulfate crystals.

결정의 평균 온도는 -10~-15℃ 정도가 적당한 수준이고 더 낮은 냉각 온도는 황산동 99%를 석출한 후에는 더 이상 냉각의 필요가 없다.The average temperature of the crystal is -10 ~ -15 ℃ moderate level and the lower cooling temperature is no need for cooling after precipitation of 99% copper sulfate.

여기에 알콜을 추가하는 것은 메칠, 에칠에 염화아연은 물과 동일하게 잘 용해되는 성질이 있으나 황산동은 알콜에는 잘 용해가 안되는 성질이 있어 황산동의 결정 분리를 쉽게 완벽하게 분리하는 목적으로 사용하는데, 그량은 물용액과 알콜의 량이 50:50 이상 추가할 필요가 없다.The addition of alcohol to methyl and acetyl zinc chloride dissolves in the same way as water, but copper sulfate is insoluble in alcohol, so it is used for the purpose of easily and completely separating the crystals of copper sulfate. The amount does not need to be added more than 50:50 water and alcohol.

90%이상의 알콜용액에서는 염화동이 복분해가 안되고 염화동으로서 알콜에 용해되기 때문에 부적합하고 용매 회수 및 안전성, 인화성의 문제가 있다.In 90% or more alcoholic solution, copper chloride is not metathesized and dissolved in alcohol as copper chloride, which is inadequate and causes solvent recovery, safety, and flammability.

또 아주 적은 량의 알콜로 알콜이 10% 미만의 경우는 황산동의 결정 분리에 도움이 되지 않는다.In addition, if the alcohol is less than 10% with a very small amount of alcohol, it does not help crystallization of copper sulfate.

본 발명의 연구결과 30~50% 상태의 알콜 용액을 사용하는 것이 적절한 수준임을 알 수가 있었다.As a result of the study of the present invention it was found that the use of the alcohol solution of 30-50% state is an appropriate level.

본 발명에서 유용한 발명은 황산아연제조시에는 시중황산을 사용하는 것이저렴하고 보관 관리상 유리한 점이 많은 것을 알 수 있었다.Inventive useful in the present invention was found that the use of commercial sulfuric acid in the manufacture of zinc sulfate is cheap and has many advantages in storage management.

그러나 염산은 35%용액으로 특수용기(FRP탱크 또는 고무라이닝탱크)에 보관하는 큰 어려움과 가격면에서 황산98%보다 대단히 고가인 것이 큰 결점이다.However, hydrochloric acid is 35% solution, which is a big disadvantage to store in special container (FRP tank or rubber lining tank) and very expensive than 98% sulfuric acid in terms of price.

또, 황산은 2가산이고 염산은 1가산이다.In addition, sulfuric acid is a diacid and hydrochloric acid is a monoacid.

이러한 문제로 인해서, 아연스크렙을 황산에 용해하여 황산아연을 만드는 것이 염산에 용해하는 것보다 저렴하게 제조할 수 있는 큰 이점이 있다.Due to this problem, zinc zinc is dissolved in sulfuric acid to make zinc sulfate, which is a great advantage that it can be manufactured cheaper than dissolved in hydrochloric acid.

또, PCB용액에는 염화동으로 즉, CuCl2로 존재하고 있으므로 황산아연으로 복분해를 시도하게 된 것이다.In addition, since the PCB solution exists as copper chloride, ie, CuCl 2 , metathesis is attempted with zinc sulfate.

이렇게 염화동 및 황산아연을 서로 복분해해서 고가인 황산동 및 고가인 염화아연을 동시 생산하는 것으로써 본 발명은 경제성과 부가가치가 높은 획기적인 발명이라 하겠다.Thus, the present invention is a breakthrough invention having high economical value and high added value by simultaneously producing copper sulfate and zinc sulfate, and simultaneously producing expensive copper sulfate and expensive zinc chloride.

<실시례 1><Example 1>

염화동폐액에 산화동을 첨가하여, PH 3~4를 조정하고 동함량 100cc당 25g 존재하는 용액,100cc에 황산아연 7수염(ZnSo47H2O) 110g을 첨가하고 물 100cc를 첨가하여 완전 용해된 액체에 메칠알콜(CH3OH) 50cc를 첨가하여, 교반혼합한 후 -10℃에서 1시간 30분간 냉각하여 결정형성을 완료하여 진공 여과기에서 모액 및 결정 분리하고 30% 알콜수용액 50cc를 사용하여 황산동을 표면수세하여 건조시키므로서 황산동 일수염 63g 얻었다.Copper oxide was added to copper chloride solution to adjust pH 3 ~ 4, 25g per 100cc of copper content, 100g of zinc sulfate sulphate (ZnSo 4 7H 2 O) added to 100cc and 100cc of water to completely dissolve the liquid 50 cc of methyl alcohol (CH 3 OH) was added to the mixture, followed by stirring and mixing. The mixture was cooled at -10 ° C. for 1 hour and 30 minutes to complete crystal formation. The mother liquor and crystals were separated in a vacuum filter. 63 g of copper sulfate monohydrate was obtained by surface-washing and drying.

<실시례 2><Example 2>

황산동 결정 분리된 모액을 회수하여 500cc비커에 넣고 교반하면서 약간 잔존하는 황산동을 아연분말을 첨가하여 황산동 용액과 치환반응을 시켜서 모액중에 있는 동을 금속동으로 치환하여, 분리하여, 여과하고 순수한 염화아연액을 회수하여 증발비커에서 가열하여 투입된 알콜을 증류 회수하여 75%알콜, 70cc를 회수하고 알콜회수된 염화아연액체를 더욱 농축하여 액체 염화아연 50%액 100g 얻었다.Copper sulfate crystals The separated mother liquor was collected, put into a 500cc beaker, and the remaining copper sulfate was stirred while adding zinc powder, followed by a substitution reaction with a copper sulfate solution. Subsequently, the copper in the mother liquor was replaced with metallic copper. The liquid was recovered, heated in an evaporation beaker and distilled off the added alcohol to recover 75% alcohol and 70 cc. The alcohol-collected zinc chloride liquid was further concentrated to obtain 100 g of a liquid zinc chloride 50% solution.

또 50% 염화아연액체를 320℃ 가열 농축하여 고체, 염화아연 48g 얻었다.The 50% zinc chloride liquid was concentrated by heating at 320 캜 to obtain 48 g of solid and zinc chloride.

<실시례 3><Example 3>

실시례 1과 동일한 염화동액체와 그 당량비에 해당되는 황산아연을 첨가한 복분해 조건에서 에칠알콜 사용하여 실시례 1과 실시례 2에서와 같은 결과를 얻을 수 있었다.The same results as in Example 1 and 2 were obtained using ethyl alcohol under metathesis conditions in which the same copper chloride liquid as in Example 1 and zinc sulfate corresponding to the equivalent ratio were added.

이렇게 하므로서 PCB부식용 폐액에서 부가가치가 높은 고가의 황산동과 염화아연을 얻을 수 있다.In this way, high value-added copper sulfate and zinc chloride can be obtained from PCB corrosion waste liquid.

Claims (2)

염화동 액체와 황산아연액체를 당량비로 혼합하여 완전 용해시키고 용해된 액체에 부피비율로 일정량에 해당하는 알콜을 첨가하여 교반 혼합한 후 -10~-15℃ 에서 일정시간 냉각하여 결정형성을 완료하므로서 황산동과 염화아연 액체가 분리되게 하는 것을 특징으로 한 황산동과 염화아연을 동시에 제조하는 방법The copper chloride liquid and the zinc sulfate liquid are mixed in an equivalence ratio to completely dissolve the mixture, and then agitated and mixed with a predetermined amount of alcohol in a volume ratio to the dissolved liquid, followed by stirring and cooling at -10 to -15 ° C to complete crystallization. A process for producing copper sulfate and zinc chloride simultaneously characterized in that the zinc chloride liquid is separated 상기 1항에서 알콜량은 수용액의 부피에 40~50%로 하는 것을 포함하는 상기 1항기재의 황산동과 염화아연을 동시에 제조하는 방법.The method of claim 1, wherein the amount of alcohol is 40 to 50% by volume of the aqueous solution, the method of simultaneously producing the copper sulfate and zinc chloride of the base material of claim 1.
KR1020000045077A 2000-08-03 2000-08-03 The method of synchronous manufacturing for copper sulfate and zing chloride KR20020011661A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100504235B1 (en) * 2002-10-14 2005-07-27 서안켐텍 주식회사 Process for preparing mono hydrate copper chloride soln.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100504235B1 (en) * 2002-10-14 2005-07-27 서안켐텍 주식회사 Process for preparing mono hydrate copper chloride soln.

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