WO2003020648A1 - Procede de purification de solutions renfermant des cyanures, des nitriles et des composes azotes - Google Patents

Procede de purification de solutions renfermant des cyanures, des nitriles et des composes azotes Download PDF

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Publication number
WO2003020648A1
WO2003020648A1 PCT/IT2002/000416 IT0200416W WO03020648A1 WO 2003020648 A1 WO2003020648 A1 WO 2003020648A1 IT 0200416 W IT0200416 W IT 0200416W WO 03020648 A1 WO03020648 A1 WO 03020648A1
Authority
WO
WIPO (PCT)
Prior art keywords
nitriles
cyanides
nitrogen
destruction
organic substances
Prior art date
Application number
PCT/IT2002/000416
Other languages
English (en)
Inventor
Graziano Sarritzu
Guido Prost
Original Assignee
Ecotec Gestione Impianti S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ecotec Gestione Impianti S.R.L. filed Critical Ecotec Gestione Impianti S.R.L.
Publication of WO2003020648A1 publication Critical patent/WO2003020648A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C02F1/705—Reduction by metals
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/18—Cyanides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen

Definitions

  • the present invention refers to the field of technologies for the destruction of polluting organic substances.
  • the subject of the present invention is a method for the destruction of cyanides, nitriles and nitrogen-containing organic substances in liquid or solid systems containing them.
  • the subject of the present invention is a method for the purification of waters and of solutions containing cyanides, acrylonitrile, acetonitrile and other nitriles, effluent from acrylonitrile, acetonitrile production plants containing high concentrations of ammonia salts and organic substances.
  • the state of the art substantially reports two working methodologies.
  • the first one involves, with some variants, treating the materials containing the undesirable pollutants at high (>800°C) temperatures.
  • the second methodology provides chemical treatments enabling to transform, in form of insoluble salts, the cyanides, yet do not act on the nitriles .
  • the subject of the present invention is a method for the destruction of cyanides, nitriles and nitrogen-containing organic substances, in which the liquid or solid systems containing these substances are treated in acid pH solutions with a reducing agent, in the presence of an oxidizing agent and optionally of an activator.
  • the reducing agent can be selected from the group comprising at least one transition element, sulfur dioxide and combination thereof.
  • the transition metal can be selected from the group comprising iron, zinc, aluminum, copper and combinations thereof.
  • the oxidizing agent can be selected from the group comprising air, hypochlorites, ozone, hydrogen peroxide and combinations thereof.
  • the air can be used under pressure with subsequent absorption of the stripped gases.
  • the activator can be selected from the group comprising ferrous sulfate, copper sulfate and combinations thereof.
  • the reaction kinetics can be increased by increases of the temperature up to 100 °C.
  • the method can be carried out with a continuous cycle or with a batch cycle.
  • the method described herein is preferably applied to the purification of acid, neutral or alkaline solutions, or of solid wastes in different aggregation states.
  • the solutions effluent from the above plants have, at production, a ⁇ 6 pH and contain about 15-30% ammonium sulfate and concentrations ranging from several hundreds to several thousands ppm of cyanides, of acrylonitrile, of acetonitrile and of nitriles in general. Moreover, other not readily detectable organic substances are present.
  • solutions subjected to purification exhibit the following features with the concentrations expressed in mg/liter : pH 3,7-6 Sulfates (expressed as S0 ) 80.000-270.000 Ammoniacal nitrogen (expressed as N) 20.000-100.000
  • test is carried on, treating the resulting solution, void of the insoluble phase that is easily separated by a mere centrifugation, with sulfuric acid to bring the pH to values ranging from 3,5 to 4,5. Then, 2g metallic iron in fine powder and other 10 ml hypochlorite
  • the trap-absorbed fumes exhibit a very limited presence of cyanides, acrylonitrile and acetonitrile.
  • the quantities of these compounds, detected in the absorbing trap lead to rule out stripping phenomena and corroborate the taking place of the chemical reaction of destruction/transformation of the above compounds.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

L'invention concerne un procédé relatif à la destruction de cyanures, de nitriles et de substances organiques azotées. A cet effet, on traite les systèmes liquides ou solides qui contiennent les produits visés, dans des solutions à pH acide, au moyen d'un agent réducteur pouvant appartenir au groupe constitué au moins par un métal de transition, dioxyde de soufre, y compris leurs combinaisons; en présence d'un agent oxydant pouvant appartenir au groupe constitué par air, hypochlorites, ozone, peroxyde d'hydrogène, y compris leurs combinaisons; et éventuellement en présence d'un agent activant.
PCT/IT2002/000416 2001-09-05 2002-06-25 Procede de purification de solutions renfermant des cyanures, des nitriles et des composes azotes WO2003020648A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM01A000534 2001-09-05
IT2001RM000534A ITRM20010534A1 (it) 2001-09-05 2001-09-05 Metodo per la distruzione di cianuri, nitrili e sostanze organiche contenenti azoto in sistemi liquidi o solidi che li contengono.

Publications (1)

Publication Number Publication Date
WO2003020648A1 true WO2003020648A1 (fr) 2003-03-13

Family

ID=11455761

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2002/000416 WO2003020648A1 (fr) 2001-09-05 2002-06-25 Procede de purification de solutions renfermant des cyanures, des nitriles et des composes azotes

Country Status (2)

Country Link
IT (1) ITRM20010534A1 (fr)
WO (1) WO2003020648A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100404441C (zh) * 2006-08-23 2008-07-23 重庆紫光化工股份有限公司 一种高浓度、难降解含腈有机废水的处理方法
WO2010086853A1 (fr) * 2009-02-02 2010-08-05 Magal Saphier Oxydation de contaminants organiques présents dans les eaux usées
CN104108782A (zh) * 2014-03-03 2014-10-22 福建省双旗山矿业有限责任公司 臭氧除氰工艺
RU2550189C1 (ru) * 2013-12-20 2015-05-10 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" Способ обезвреживания циансодержащих растворов и пульп
CN104944645A (zh) * 2015-07-17 2015-09-30 北京矿冶研究总院 一种含氰尾矿浆处理方法
CN112142070A (zh) * 2020-10-27 2020-12-29 长春黄金研究院有限公司 一种含氰废水中有价金属分离回收的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459197A1 (fr) * 1990-05-24 1991-12-04 Bayer Ag Procédé de purification des solutions de sulfate d'ammonium
US5376285A (en) * 1993-02-11 1994-12-27 Uop Oxidative removal of aqueous metal-complexed cyanide under acidic conditions
EP1123900A1 (fr) * 2000-02-11 2001-08-16 Dsm N.V. Procédé et dispositif pour la purification des solutions aqueuses contenant du sulfate d'ammonium, nitrate d'ammonium et de composés organiques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459197A1 (fr) * 1990-05-24 1991-12-04 Bayer Ag Procédé de purification des solutions de sulfate d'ammonium
US5376285A (en) * 1993-02-11 1994-12-27 Uop Oxidative removal of aqueous metal-complexed cyanide under acidic conditions
EP1123900A1 (fr) * 2000-02-11 2001-08-16 Dsm N.V. Procédé et dispositif pour la purification des solutions aqueuses contenant du sulfate d'ammonium, nitrate d'ammonium et de composés organiques

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100404441C (zh) * 2006-08-23 2008-07-23 重庆紫光化工股份有限公司 一种高浓度、难降解含腈有机废水的处理方法
WO2010086853A1 (fr) * 2009-02-02 2010-08-05 Magal Saphier Oxydation de contaminants organiques présents dans les eaux usées
US8877070B2 (en) 2009-02-02 2014-11-04 Magal Saphier Oxidation of organic contaminants present in wastewater
RU2550189C1 (ru) * 2013-12-20 2015-05-10 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" Способ обезвреживания циансодержащих растворов и пульп
CN104108782A (zh) * 2014-03-03 2014-10-22 福建省双旗山矿业有限责任公司 臭氧除氰工艺
CN104944645A (zh) * 2015-07-17 2015-09-30 北京矿冶研究总院 一种含氰尾矿浆处理方法
CN112142070A (zh) * 2020-10-27 2020-12-29 长春黄金研究院有限公司 一种含氰废水中有价金属分离回收的方法

Also Published As

Publication number Publication date
ITRM20010534A1 (it) 2003-03-05
ITRM20010534A0 (it) 2001-09-05

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