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WO1996017110A1 - Procede de traitement de produits de nettoyage alcalins - Google Patents

Procede de traitement de produits de nettoyage alcalins Download PDF

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Publication number
WO1996017110A1
WO1996017110A1 PCT/EP1995/004503 EP9504503W WO9617110A1 WO 1996017110 A1 WO1996017110 A1 WO 1996017110A1 EP 9504503 W EP9504503 W EP 9504503W WO 9617110 A1 WO9617110 A1 WO 9617110A1
Authority
WO
WIPO (PCT)
Prior art keywords
separator
decanter
bath
carbon atoms
cleaning
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.)
Ceased
Application number
PCT/EP1995/004503
Other languages
German (de)
English (en)
Inventor
Bernhard Kotschy
Brigitte Spei
Armin Friesendorf
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of WO1996017110A1 publication Critical patent/WO1996017110A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36—Regeneration of waste pickling liquors

Definitions

  • the invention is in the field of the technical cleaning of hard surfaces, in particular the cleaning of oiled or greased metal surfaces. It relates to a process for the preparation of oil or grease-contaminated alkaline cleaning baths for disposal or preferably for the at least partial return of the water phase to the cleaning bath.
  • oil separators which only work with free, non-emulsified oils and require a certain settling time until creaming
  • hydrocyclone simple centrifugal separator
  • separator centrifugal separator for oil separation and sludge removal
  • magnetic separator for removing magnetic impurities such as chips, abrasion and sinter from iron
  • filters such as drum or belt filters for separating solids
  • membrane filtration processes such as For example, ultra or microfiltration, with which oils, fats and some surfactants are retained.
  • the oils and fats that have been detached and at least partially emulsified in the cleaning solution, as well as soaps resulting from hydrolysis, represent the main group of contaminants in the cleaning solution.
  • COD COD
  • the removal of oils and greases from contaminated cleaning baths with 01 separators or separators presupposes that these contaminants are in non-emulsified form. Such measures are therefore only successful with non-emulsifying or only weakly emulsifying cleaners, but these have the disadvantage of reduced cleaning ability.
  • the object of the invention is to provide a process for the economical processing and / or regeneration of organically contaminated, strongly emulsifying alkaline cleaners in which the bath care measures described above do not reliably lead to the desired success.
  • Ready-to-use alkaline cleaning solutions have pH values above 9, usually above 12, which is due to a builder system consisting of alkalis, silicates and / or alkaline phosphates or borates.
  • the cleaners generally contain nonionic and / or preferably anionic surfactants. Due to their emulsifying power, these surfactants make cleaning tasks easier, but for the same reason make bathroom care measures more difficult.
  • Emulsifying hydrolysis products from oils or fats work in the same direction.
  • This object is achieved by a process for working up and / or regenerating contaminated alkaline cleaners, characterized in that a) the contaminated cleaning solution is mixed with one or more cationic organic flocculants or emulsion splitters and after a reaction time of 5 to 60 minutes, b) fed to a separator or decanter system for carrying out the phase separation and c) the water phase in whole or in part returned to the detergent bath or sent for further disposal.
  • Separators or decanters are special types of centrifuges that enable the continuous separation of material with different densities by centrifugal force.
  • the different embodiments are generally known in chemical process engineering, see, for example, Ullmanns Encyklopadie der Technische Chemie, Verlag Chemie, 4th Edition 1972, Volume 2, pp. 208-220.
  • X n is a single, double or triple negatively charged, preferably inorganic, anion.
  • the temperature of the cleaning bath to be worked up or regenerated should be in the range from 30 to 80 ° C. during the addition of the flocculant or emulsion splitter to the subsequent reaction time. Lower temperatures lead to less effective flocculation or emulsion cleavage, higher temperatures bring no further advantage which would outweigh the increased energy expenditure. In general Tem ⁇ are temperatures in the range of 35 to 50 C ⁇ sufficient.
  • the required amount of flocculant or emulsion splitter can be optimized through a series of preliminary tests on a laboratory scale.
  • the optimally determined amount of reagent is preferably added to the reaction container in portions, which can be done, for example, automatically from a storage container by using a piston or membrane pump.
  • reaction time approximately 10 to approximately 30 minutes, in particular approximately 15 minutes, to complete the formation of flocs or the emulsion cleavage. This can be done without stirring. However, it is more favorable to let the agitator continue to run at a reduced speed, for example at about 10 to about 30 rpm, since this has a positive effect on the formation of flakes.
  • the flocculant or emulsion splitter can in principle be added to the reaction container by hand. However, it is preferable to connect the reaction container to a device for metering in the flocculant or emulsion splitter.
  • a device for metering in the flocculant or emulsion splitter can consist, for example, of a storage container and a pump, for example a diaphragm or piston pump.
  • the pump is preferably included equipped with a control system that makes it possible to preselect the amount of flocculant or emulsifier to be metered. Alternatively, the pump is controlled by a sensor element that detects the flocculation or cleavage end point.
  • the entire device comprises several vessels. These can either be a plurality of reaction containers, the contents of one container being fed to the separator or decanter, while the flocculant or emulsion splitter and / or the after-reaction are added in the second container or in the further containers. Switching between individual containers can then take place automatically.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

L'invention concerne un procédé de recyclage et/ou de régénération d'un produit de nettoyage alcalin chargé, dans lequel (a) la solution de nettoyage chargée est mélangée avec un ou plusieurs agents organiques cationiques qui ont des propriétés floculantes ou qui sont capables de décomposer les émulsions et après un temps de réaction de 5 à 60 minutes, (b) cette solution est amenée à un système de séparation ou de décantation pour effectuer une séparation des phases et enfin (c) la phase aqueuse est recyclée partiellement ou en totalité vers le bain de nettoyage ou vers d'autres installations d'épuration complémentaire. L'invention concerne également une installation permettant la mise en ÷uvre du procédé.
PCT/EP1995/004503 1994-11-25 1995-11-16 Procede de traitement de produits de nettoyage alcalins Ceased WO1996017110A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944441987 DE4441987A1 (de) 1994-11-25 1994-11-25 Aufbereitungsverfahren für alkalische Reiniger
DEP4441987.2 1994-11-25

Publications (1)

Publication Number Publication Date
WO1996017110A1 true WO1996017110A1 (fr) 1996-06-06

Family

ID=6534132

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/004503 Ceased WO1996017110A1 (fr) 1994-11-25 1995-11-16 Procede de traitement de produits de nettoyage alcalins

Country Status (2)

Country Link
DE (1) DE4441987A1 (fr)
WO (1) WO1996017110A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7706967B2 (en) 1997-08-19 2010-04-27 Continental Automotive Systems Us, Inc. Vehicle information system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059515A (en) * 1975-08-26 1977-11-22 Betz Laboratories, Inc. Process for clarification of oil-containing waste
DE3247431A1 (de) * 1982-12-22 1984-06-28 Henkel KGaA, 4000 Düsseldorf Verfahren zur regenerierung bzw. zum recycling von waessrigen entfettungs- und reinigungsloesungen
EP0249164A1 (fr) * 1986-06-13 1987-12-16 Henkel Kommanditgesellschaft auf Aktien Agents tensio-actifs cationiques basés sur des composés d'ammonium quaternaires et leur application comme détergents
DE4011611A1 (de) * 1990-04-10 1991-10-17 Lutter Galvanotechnik Gmbh Demulgiermittel und verfahren zum demulgieren von emulsionen
DE4228096A1 (de) * 1992-08-26 1994-03-03 Gfr Ges Fuer Recycling Mbh Verfahren und Vorrichtung zur Behandlung von flüssigen Medien

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059515A (en) * 1975-08-26 1977-11-22 Betz Laboratories, Inc. Process for clarification of oil-containing waste
DE3247431A1 (de) * 1982-12-22 1984-06-28 Henkel KGaA, 4000 Düsseldorf Verfahren zur regenerierung bzw. zum recycling von waessrigen entfettungs- und reinigungsloesungen
EP0249164A1 (fr) * 1986-06-13 1987-12-16 Henkel Kommanditgesellschaft auf Aktien Agents tensio-actifs cationiques basés sur des composés d'ammonium quaternaires et leur application comme détergents
DE4011611A1 (de) * 1990-04-10 1991-10-17 Lutter Galvanotechnik Gmbh Demulgiermittel und verfahren zum demulgieren von emulsionen
DE4228096A1 (de) * 1992-08-26 1994-03-03 Gfr Ges Fuer Recycling Mbh Verfahren und Vorrichtung zur Behandlung von flüssigen Medien

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7706967B2 (en) 1997-08-19 2010-04-27 Continental Automotive Systems Us, Inc. Vehicle information system

Also Published As

Publication number Publication date
DE4441987A1 (de) 1996-05-30

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