DE2657377A1 - Wet oxidative degradation of organic substances - in effluents in which a redox potential is attained by addn. of iron and phosphorus in trace quantities - Google Patents

Wet oxidative degradation of organic substances - in effluents in which a redox potential is attained by addn. of iron and phosphorus in trace quantities

Info

Publication number
DE2657377A1
DE2657377A1 DE19762657377 DE2657377A DE2657377A1 DE 2657377 A1 DE2657377 A1 DE 2657377A1 DE 19762657377 DE19762657377 DE 19762657377 DE 2657377 A DE2657377 A DE 2657377A DE 2657377 A1 DE2657377 A1 DE 2657377A1
Authority
DE
Germany
Prior art keywords
redox potential
oxidative degradation
ppm
effluents
phosphorus
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
DE19762657377
Other languages
German (de)
Other versions
DE2657377C2 (en
Inventor
Hans-Ulrich Dr Alles
Knut Dipl Chem Dr Hammerstroem
Otto Dipl Ing Horak
Walter Dipl Chem Dr Horstmann
Ruthard Dipl Chem Dr Potthast
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
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
Priority to DE2559374A priority Critical patent/DE2559374C2/en
Application filed by Bayer AG filed Critical Bayer AG
Priority to DE2657377A priority patent/DE2657377C2/en
Publication of DE2657377A1 publication Critical patent/DE2657377A1/en
Application granted granted Critical
Publication of DE2657377C2 publication Critical patent/DE2657377C2/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/06Treatment of sludge; Devices therefor by oxidation
    • C02F11/08Wet air oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/725Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/06Pressure conditions
    • C02F2301/066Overpressure, high pressure

Landscapes

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

Abstract

In the parent patent, the wet oxidative degradation of org. impurities in effluents was described by oxidising at a redox potential of 300-600 mV (measured with a Pt electrode against a Ag/AgCl electrode), at 80-250 degrees C and 3-200 bars with O2(-contg. gases). The improvement in this application lies in adjusting the redox potential by adding 300-500 ppm Fe degrees, Fe++ and/or Fe+++ as well as 1-10 ppm (pref. 4-7 ppm) P (as PO4---).

Description

Verfahren zum naßoxidativen Abbau von organischen Verbindungen in Abwässern (Zusatz zu Patent (Anmeldung P 2 559 374.2)) Gegenstand des Hauptpatents (Anmeldung P 2 559 374.2) ist ein Verfahren zum naßoxidativen Abbau von organischen Verbindungen in Abwässern bei erhöhten Temperaturen, das dadurch gekennzeichnet ist, daß das Abwasser bei einem Redoxpotential zwischen 300 bis 600 Millivolt, gemessen mit einer Platinelektrode gegenüber einer Silber-Silber-Chloridelektrode, bei Temperaturen von etwa 80 bis 2500C bei Drücken von etwa 3 bis 200 bar mit Sauerstoff oder sauerstoffhaltigen Gasen oxidiert wird.Process for the wet-oxidative degradation of organic compounds in Wastewater (addendum to patent (application P 2 559 374.2)) Subject of the main patent (Application P 2 559 374.2) is a process for the wet-oxidative degradation of organic substances Compounds in wastewater at elevated temperatures, which is characterized is that the wastewater is measured at a redox potential between 300 to 600 millivolts with a platinum electrode versus a silver-silver-chloride electrode, at temperatures from about 80 to 2500C at pressures of about 3 to 200 bar with oxygen or oxygen-containing Gases is oxidized.

Gegenstand des Hauptpatents ist ferner die Einstellung des genannten Redoxpotentiales durch Zugabe von Redoxsystemen, wobei diese Einstellung besonders vorteilhaft durch Zugabe von Fe°, Fe²+, fe³+ einzeln oder in beliebiger Kombination erfolgt.The subject of the main patent is also the discontinuation of the aforementioned Redox potential by adding redox systems, this setting being special advantageous by adding Fe °, Fe² +, Fe³ + individually or in any combination he follows.

Es wurde nun gefunden, daß bei der Einstellung des Redoxpotentials auf Werte zwischen 300 und 600 Millivolt durch Fe , Fe 2+, Fe3+ die zusätzliche Gegenwart von Phosphationen besonders vorteilhaft ist.It has now been found that when setting the redox potential to values between 300 and 600 millivolts due to Fe, Fe 2+, Fe3 + the additional The presence of phosphate ions is particularly advantageous.

Gegenstand der vorliegenden Erfindung ist somit ein Verfahren zum naßoxidativen Abbau von organischen Verbindungen in Abwässern bei erhöhten Temperaturen gemäß Hauptpatent (Anmeldung P 2 559 374.2), wobei das Abwasser bei einem Redoxpotential zwischen etwa 300 bis 600 Millivolt, gemessen mit einer Platinelektrode gegenüber einer Silber-Silber-Chloridelektrode, bei Temperaturen von etwa 80 bis 2500C bei Drücken von etwa 3 bis 200 bar mit Sauerstoff oder sauerstoffhaltigen Gasen oxidiert wird, dadurch gekennzeichnet, daß die Einstellung des Redoxpotentials durch Zugabe von etwa 300 bis 500 ppm Fe°, Fe²+, Fe³+ einzeln oder in beliebiger Kombination plus 1 bis 10 ppm, vorzugsweise 4 bis 7 ppm Phosphor in Form von Phosphationen erfolgt.The present invention is therefore a method for Wet oxidative degradation of organic compounds in wastewater at elevated temperatures according to the main patent (application P 2 559 374.2), the wastewater at a redox potential between about 300 to 600 millivolts, measured with a platinum electrode opposite a silver-silver-chloride electrode, at temperatures of about 80 to 2500C Oxidized pressures of about 3 to 200 bar with oxygen or oxygen-containing gases is, characterized in that the adjustment of the redox potential by adding from about 300 to 500 ppm Fe °, Fe² +, Fe³ + individually or in any combination plus 1 to 10 ppm, preferably 4 to 7 ppm phosphorus takes place in the form of phosphate ions.

Claims (1)

Patentanspruch Verfahren zum naßoxidativen Abbau von organischen Verbindungen in Abwässern bei erhöhten Temperaturen gemäß Hauptpatent (Anmeldung P 2 559 374.2), wobei das Abwasser bei einem Redoxpotential zwischen 300 bis 600 Millivolt, gemessen mit einer Platinelektrode gegenüber einer Silber-Silber-Chloridelektrode, bei Temperaturen von etwa 80 bis 250°C bei Drücken von etwa 3 bis 200 bar mit Sauerstoff oder sauerstoffhaltigen Gasen oxidiert wird, dadurch gekennzeichnet, daß die Einstellung des Redoxpotentials durch Zugabe von etwa 300 bis 500 ppm Fe , Fe 2+ Fe3+ einzeln oder in beliebiger Kombination plus 1 bis 10 ppm, vorzugsweise 4 bis 7 ppm Phosphor in Form von Phosphationen erfolgtPatent claim process for the wet-oxidative degradation of organic compounds in wastewater at elevated temperatures according to the main patent (application P 2 559 374.2), the wastewater measured at a redox potential between 300 to 600 millivolts with a platinum electrode versus a silver-silver-chloride electrode, at temperatures from about 80 to 250 ° C at pressures of about 3 to 200 bar with oxygen or oxygen-containing Gases is oxidized, characterized in that the setting of the redox potential by adding about 300 to 500 ppm Fe, Fe 2+ Fe3 + individually or in any desired form Combination plus 1 to 10 ppm, preferably 4 to 7 ppm phosphorus in the form of phosphate ions he follows
DE2657377A 1975-12-31 1976-12-17 Process for the wet-oxidative degradation of organic compounds in wastewater Expired DE2657377C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2559374A DE2559374C2 (en) 1975-12-31 1975-12-31 Process for the wet-oxidative degradation of organic compounds in waste water
DE2657377A DE2657377C2 (en) 1975-12-31 1976-12-17 Process for the wet-oxidative degradation of organic compounds in wastewater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2559374A DE2559374C2 (en) 1975-12-31 1975-12-31 Process for the wet-oxidative degradation of organic compounds in waste water
DE2657377A DE2657377C2 (en) 1975-12-31 1976-12-17 Process for the wet-oxidative degradation of organic compounds in wastewater

Publications (2)

Publication Number Publication Date
DE2657377A1 true DE2657377A1 (en) 1978-06-29
DE2657377C2 DE2657377C2 (en) 1982-10-21

Family

ID=32714396

Family Applications (2)

Application Number Title Priority Date Filing Date
DE2559374A Expired DE2559374C2 (en) 1975-12-10 1975-12-31 Process for the wet-oxidative degradation of organic compounds in waste water
DE2657377A Expired DE2657377C2 (en) 1975-12-31 1976-12-17 Process for the wet-oxidative degradation of organic compounds in wastewater

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE2559374A Expired DE2559374C2 (en) 1975-12-10 1975-12-31 Process for the wet-oxidative degradation of organic compounds in waste water

Country Status (1)

Country Link
DE (2) DE2559374C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010713A1 (en) * 1978-11-02 1980-05-14 Bayer Ag Process for the purification of waste water containing organic compounds of sulfur and phosphor
DE4400243A1 (en) * 1994-01-07 1995-07-13 Bayer Ag Process for the wet oxidative treatment of organic pollutants in waste water
WO2012167297A1 (en) * 2011-06-07 2012-12-13 Walter Kanzler Method for processing contaminated brine solutions for chlor-alkali electrolysis

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH649071A5 (en) * 1978-11-13 1985-04-30 Giuseppe Galassi WET OXIDATION OF POLLUTANTS BY LIQUID OXYGEN.
DE3316265A1 (en) * 1982-07-31 1984-02-02 Bayer Ag, 5090 Leverkusen METHOD FOR WASTEWATER CLEANING
DE3418934A1 (en) * 1984-05-22 1985-11-28 Sigri GmbH, 8901 Meitingen GRAPHITE ELECTRODE FOR ARC FURNACES AND METHOD FOR THEIR PRODUCTION

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS-ERMITTELT *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010713A1 (en) * 1978-11-02 1980-05-14 Bayer Ag Process for the purification of waste water containing organic compounds of sulfur and phosphor
DE4400243A1 (en) * 1994-01-07 1995-07-13 Bayer Ag Process for the wet oxidative treatment of organic pollutants in waste water
WO2012167297A1 (en) * 2011-06-07 2012-12-13 Walter Kanzler Method for processing contaminated brine solutions for chlor-alkali electrolysis
CN103889906A (en) * 2011-06-07 2014-06-25 沃尔特·坎茨勒 Method for processing contaminated brine solutions for chlor-alkali electrolysis
CN103889906B (en) * 2011-06-07 2017-05-10 沃尔特·坎茨勒 Method for processing contaminated brine solutions for chlor-alkali electrolysis

Also Published As

Publication number Publication date
DE2559374C2 (en) 1982-10-21
DE2657377C2 (en) 1982-10-21
DE2559374A1 (en) 1977-07-21

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