• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Certain strongly basic, acrylic-based anion exchange resins are employed to selectively remove ferrocyanide and ferricyanide anions from aqueous fluids containing thiocyanate anions. A portion of the resin regeneration fluid may be reclaimed for re-use.
    公开号:SU921453A3
    申请号:SU782599201
    申请日:1978-04-06
    公开日:1982-04-15
    发明作者:Латам Авери Нойес
    申请人:Ром Энд Хаас Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to wastewater treatment and can be used to selectively isolate cyanide iron complexes in the presence of an thiocyanate anion.
    Closest to the proposed technical essence and the achieved result is a method of separating cyanide metal complexes from wastewater by sorption of a strongly basic aromatic-based anion-exchange resin. The resin regeneration is carried out with an alkali solution or saline solution [1].
    However, the known method does not allow to isolate cyanide complexes of iron in the presence of thiocyanate anion, since their joint sorption occurs.
    The aim of the invention is the allocation of cyanide complexes of iron in the presence of thiocyanate anion.
    This goal is achieved by the method of separation of cyanide metal complexes from wastewater by sorption of a strongly basic acrylate-based anion exchange resin, which is a quaternary ammonium salt of N - dimethyl 5 nopropyl acrylamide containing 215 weight. % of one of the polyethylene-unsaturated substances for the formation of cross-links.
    The technology of the method is as follows.
    Industrial wastewater containing iron cyanide complexes and thiocyanate anions is passed through a highly basic anion exchange resin column. A strongly basic anion-exchange resin is prepared from a macroscale polymer of methyl acrylate 90 wt. D, diethylene glycol divinyl ether 2 wt.% And 20 divinylbenzene 80 wt. The transmission rate of the solution is 9.625 19.2 l / h. Resin regeneration
    921953 4 pour solution of sodium chloride with a concentration of 1-25%.
    Example 1 A column with a diameter of 50> 8 mm is loaded with 1200 ml of resin to obtain a 0.6 m deep layer. $ Wastewater (pH 10.5) containing 362 mg / l ferrocyanide in terms of cyanide ion and 100 mg / l thiocyanate ion are passed speed 19.9l / h. A total of 120 l of wastewater is passed, 10 containing 93.99 g of ferrocyanide (in terms of cyanide ion) and 12 g of thiocyanate ion. The resin retained 93.29 g of ferrocyanide (in terms of cyanide ion) and 2.76 g of thiocyanate ion, which corresponds to a resin capacity of 35.2 kg / m 3 and 2.29 kg / m 3 for cyanide ion and thiocyanate ion .
    Example 2. To reduce the selectivity of aromatic and acrylate-based resins, wastewater (pH 8.5) containing sodium sulfate 1 g / l, sodium chloride 1 g / l, ferrocyanide in terms of cyanide ion 25 mg / l, ion thiocyanate 250 mg / l, 25 ammonium chloride 500 mg / l, are passed through two columns, which contain: the first 20 ml of strongly basic anion exchange resin based on acrylate, the second 20 ml of strongly basic anion exchange resin based on aromatic.
    Aromatic resin retains 0.753 g of thiocyanate ion until breakthrough. The acrylate-based resin retains 0.153 g of thiocyanate ion until breakthrough, which corresponds to the capacity of the thiocyanate ions of 37.6 kg / m 3 and 7.68 kg / m 3 respectively.
    Thus, a strongly basic acrylate-based anion-exchange resin allows one to isolate cyanide iron complexes in the presence of a thiocyanate ion.
    权利要求:
    Claims (2)
    [1]
    392 is a 1-25 solution of sodium chloride. Example 1 A column with a diameter of 50.8 mm is charged with 1200 ml of resin to form a layer with a depth of 0.6 m. Sewage water (pH 10.5) containing Pb2 mg / l ferrocyanide calculated as cyanide ion and 100 mg / l ion thiocyanate pass at a rate of T, 4 l / h Total pass 120 l of waste water containing 3, g of ferrocyanide (in P 1 recalculated to cyanide ion) and 12 g of ion thiocyanate. A resin was retained with 43.2 g of ferrocyanide (in terms of cyanide ion) and 2.76 g of ion thiocyanate, which corresponds to a resin capacity of 35.2 kg / m and 2.2 ion cyanide and ion thiocyanate. Example
    [2]
    2. To match the selectivity of aromatic and acrylate-based resins, waste water (pH 8.5) containing sodium sulfate 1 g / l, sodium chloride 1 g / l ferrocyanide calculated as 25 mg / l cyanide ion, ion thiocyanate 250 mg / l, ammonium chloride 500 mg / l, is passed through two columns, which contain: first - 20 ml of a strongly basic anion exchange resin for acrylate. on a basis, an sec - 20 ml of a strongly basic anion-exchange resin on an aromatic basis. The aromatic resin holds 0.753 g of ion 4-thiocyanate until breakthrough. Acrylate-based resin holds 0.153 g of ion thiocyanate until breakthrough, which corresponds to the capacity of the thiocyanate resin to ion 37.6 kg / m and 7.68 kg / m, respectively. Thus, a strong acrylic base anion exchange resin allows the release of iron cyanide complexes in the presence of ion thiocyanate. The method of separating cyanide metal complexes from wastewater by sorption with a strongly basic anion exchange resin, characterized in that, in order to release the cyanide complexes to (iron in the presence of anion thiocyanate, the sorption is carried out with a strongly basic anion-exchange resin on an acrylate basis, which is quaternized ammonium ammonium, which is a basic ammonium oxide. acrylamide containing 2-15% by weight of one of the polyethylenically unsaturated substances for cross-linking. Sources of information taken into account by the expert Isa 1. Period polyteckn. Chem. Enqnq 1967, II, ff 1, pp. 53-59.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR2386490A1|1978-11-03|
    FR2386490B1|1980-10-31|
    IT7867764D0|1978-04-06|
    BE865784A|1978-10-09|
    NO781151L|1978-10-10|
    IT1109667B|1985-12-23|
    CA1096978A|1981-03-03|
    US4115260A|1978-09-19|
    GB1597283A|1981-09-03|
    ES468634A1|1978-12-01|
    SE7803190L|1978-10-08|
    DE2814775A1|1978-10-19|
    NL7803672A|1978-10-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3869383A|1971-11-17|1975-03-04|Fuji Photo Film Co Ltd|Process for treating waste photographic processing solutions|
    US3788983A|1972-01-26|1974-01-29|Rohm & Haas|Selective separation of cyanide from waste streams by adsorption process|
    JPS492360A|1972-04-21|1974-01-10|US4267159A|1980-08-08|1981-05-12|Crane Co.|Cyanide recovery|
    US4370240A|1981-06-10|1983-01-25|United States Steel Corporation|Removal of iron compounds from organic process streams|
    AT375683B|1982-06-15|1984-08-27|Wolfram Manner|METHOD FOR THE RECOVERY OF INGREDIENTS FROM ACID OR ACIDIFIED SOURING, ACIDATING OR GALVANOLOLES|
    ZW21384A1|1984-01-12|1985-05-08|Mineral Tech Council|The regeneration of thiocyanate resins|
    DE3424064C2|1984-06-29|1992-07-02|Agfa-Gevaert Ag, 5090 Leverkusen, De|
    US4708804A|1985-06-28|1987-11-24|Resource Technology Associates|Method for recovery of cyanide from waste streams|
    DE3924100A1|1989-07-20|1991-01-24|Didier Werke Ag|METHOD FOR REMOVING HEAVY METALS FROM SEWAGE|
    US5116415A|1989-09-25|1992-05-26|Aqs, Inc.|Metal value recovery or removal from aqueous media|
    GB9007122D0|1990-03-30|1990-05-30|Ortech Corp|Removal of base metals and cyanide from gold-barren c-i-p solutions|
    EP0810904B1|1995-02-24|1998-09-02|MPR Services, Inc.|Amine heat stable salt removal from type ii anion exchange resin|
    US6071484A|1997-01-24|2000-06-06|Mpr Services, Inc.|Process for treating gas with ultra-lean amine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/785,475|US4115260A|1977-04-07|1977-04-07|Selective removal of iron cyanide anions from fluids containing thiocyanates|
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