KR960010531A - Method for preparing ferric chloride aqueous solution - Google Patents

Method for preparing ferric chloride aqueous solution Download PDF

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Publication number
KR960010531A
KR960010531A KR1019940023370A KR19940023370A KR960010531A KR 960010531 A KR960010531 A KR 960010531A KR 1019940023370 A KR1019940023370 A KR 1019940023370A KR 19940023370 A KR19940023370 A KR 19940023370A KR 960010531 A KR960010531 A KR 960010531A
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South Korea
Prior art keywords
iron oxide
ferric chloride
pollution
acid
waste acid
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KR1019940023370A
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Korean (ko)
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KR0122328B1 (en
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박성국
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김만제
포항종합제철 주식회사
신창식
재단법인 산업과학기술연구소
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Priority to KR1019940023370A priority Critical patent/KR0122328B1/en
Publication of KR960010531A publication Critical patent/KR960010531A/en
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/10—Halides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

본 발명은 폐산, 산화철등 폐자원을 주원료로 하여 염화제일철 및 염화제이철의 혼합수용액을 만들고, 과산화수소와 같은 무공해 산화제를 사용하여 제일철이온을 제이철이온으로 산화시켜 고순도, 고농도의 염화제이철 수용액을 제조하는 방법에 관한 것이다.The present invention is to prepare a mixed aqueous solution of ferric chloride and ferric chloride using waste resources such as waste acid, iron oxide, etc., and to oxidize ferrous ions to ferric ions using a pollution-free oxidizing agent such as hydrogen peroxide to produce a high-purity, high-concentration ferric chloride solution It is about a method.

본 발명에 공해처리 물질인 폐산, 산화철 및 슬러지 등, 폐자원을 재활용하여 경제성을 도모하고 수소가스 발생에 의한 환경공해 및 위험성을 배제하며, 염소가스를 사용하지 않고 과산화수소와 같은 무공해 산화제를 사용하여 환경공해 측면에서 보다 유리하고 제조공정의 단순화, 낮은 생산원가로 염화제이철 수용액을 제조하는 방법을 제공하고자 하는데 그 목적이 있다.The present invention promotes economical efficiency by recycling waste resources such as waste acid, iron oxide and sludge which are pollution treatment materials, and excludes environmental pollution and dangers caused by hydrogen gas generation, and uses a pollution free oxidant such as hydrogen peroxide without using chlorine gas. It is an object of the present invention to provide a method for preparing ferric chloride aqueous solution at a more favorable environment, simplifying the manufacturing process, and low production cost.

본 발명은 희석한 폐산에 산화철을 침적시켜 산화철중에 함유된 불순물을 용해시킨 후 여과하고 순수로 세척한 다음, 산화철을 폐산/산화철의 적정 중량비로 하여 폐산중에 투입한 후 가열하여 산화철을 용해시키고, 미용해 산화철이 미소량 잔류되는 시점에서 여과하며, 산화철이 용해된 폐산에 과산화수소등과 같은 불순물을 용액중에 잔류시키지 않는 무공해 산화제를 서서히 투입하여 제일철이온을 제이철이온으로 산화시킨 다음, 제조된 용액의 성분 및 농도를 측정하고 적정농도로 농축함으로서 염화제이철 수용액을 제조하는 방법을 그 요지로 한다.In the present invention, iron oxide is deposited on the diluted waste acid to dissolve impurities contained in the iron oxide, filtered and washed with pure water, and then iron oxide is added to the waste acid at an appropriate weight ratio of waste acid / iron oxide and heated to dissolve iron oxide. Filter at the time when unresolved iron oxide is left in a small amount, and gradually oxidize ferrous ions to ferric ions by gradually adding a pollution-free oxidant that does not retain impurities such as hydrogen peroxide in the spent acid in which iron oxide is dissolved. A method for producing an aqueous ferric chloride solution by measuring the components and concentrations and concentrating to an appropriate concentration is the main point.

Description

염화제이철 수용액의 제조방법Method for preparing ferric chloride aqueous solution

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (4)

폐산을 순수로 희석하여 1-20wt%의 염산농도로 만든 다음, 산화철을 투입하여 상온에서 5분-2시간 침적시켜 산화철중에 함유된 불순물을 용해시킨 후 여과하고 순수로 세척하는 단계; 세척된 산화철을 폐산/산화철의 중량비가 1-3의 범위가 되도록 폐산중에 투입한 후 60-100℃로 가열하여 산화철을 용해시키고 미용해 산화철이 3-20% 잔류되는 시점에서 여과하는 단계; 산화철이 용해된 폐산에 불순물을 용액중에 잔류시키지 않는 무공해 산화제를 서서히 투입하여 제일철이온을 제이철이온으로 산화시키는 단계; 및 상기와 같이 제조된 용액의 성분 및 농도를 측정하고 적정농도 이상으로 농축하는 단계를 포함하여 구성됨을 특징으로 하는 염화제이철 수용액의 제조방법.Diluting the waste acid with pure water to make a hydrochloric acid concentration of 1-20wt%, and then adding iron oxide to deposit 5 minutes-2 hours at room temperature to dissolve impurities contained in iron oxide, followed by filtration and washing with pure water; Filtering the washed iron oxide in the spent acid so that the weight ratio of spent acid / iron oxide is in the range of 1-3, and then heating to 60-100 ° C. to dissolve the iron oxide and filter it at the point where 3-20% of the iron oxide remains undissolved; Gradually oxidizing ferrous ions to ferric ions by slowly adding a pollution-free oxidant that does not leave impurities in the solution in which iron oxide is dissolved; And measuring the components and the concentration of the solution prepared as described above and concentrating to an appropriate concentration or more. 제1항에 있어서, 무공해 산화제가 과산화수소인 것을 특징으로 하는 염화제이철 수용액의 제조방법.The method for producing an aqueous ferric chloride solution according to claim 1, wherein the pollution free oxidant is hydrogen peroxide. 제1항에 있어서, 무공해산화제가 오존(O3), 치아염소산(HOC1), 과망간산칼륨(KMnO4), 염소산(HC103) 또는 이산화염(C102)인 것을 특징으로 하는 염화제이철 수용액의 제조방법.The method for producing a ferric chloride aqueous solution according to claim 1, wherein the pollution-free oxidizing agent is ozone (O3), hypochlorite (HOC1), potassium permanganate (KMnO4), chloric acid (HC103) or salt (C102). 제1항에 제3항중의 어느 한 항에 있어서, 산화철용해시 폐산의 염산농도가 20-30wt%인 것을 특징으로 하는 염화제이철 수용액의 제조방법.The method for producing a ferric chloride aqueous solution according to any one of claims 1 to 3, wherein the hydrochloric acid concentration of the waste acid at the time of melting iron oxide is 20-30 wt%. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940023370A 1994-09-15 1994-09-15 Method of iron dichloride liquid KR0122328B1 (en)

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KR1019940023370A KR0122328B1 (en) 1994-09-15 1994-09-15 Method of iron dichloride liquid

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KR0122328B1 KR0122328B1 (en) 1997-11-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200008379A (en) 2018-07-16 2020-01-28 금오공과대학교 산학협력단 Device for manufacturing ferric chloride from iron chloride waste acid and method for manufacturing ferric chloride from iron chloride waste acid using the device
CN112850797A (en) * 2020-10-26 2021-05-28 斯瑞尔环境科技股份有限公司 Production method of ultrapure ferric trichloride

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100308753B1 (en) * 1999-05-12 2001-09-13 권영순 Method of removing contaminant in waste water
KR100394085B1 (en) * 2001-05-30 2003-08-09 한국과학기술연구원 A feeding method of chlorine for the oxidation of aqueous ferrous chloride solution
KR101648682B1 (en) 2015-12-09 2016-08-17 이제훈 Method of iron dichloride

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200008379A (en) 2018-07-16 2020-01-28 금오공과대학교 산학협력단 Device for manufacturing ferric chloride from iron chloride waste acid and method for manufacturing ferric chloride from iron chloride waste acid using the device
CN112850797A (en) * 2020-10-26 2021-05-28 斯瑞尔环境科技股份有限公司 Production method of ultrapure ferric trichloride

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