EP0883676B1 - Nettoyant pour installations de l'industrie alimentaire, son utilisation et procede de nettoyage de ces installations - Google Patents

Nettoyant pour installations de l'industrie alimentaire, son utilisation et procede de nettoyage de ces installations Download PDF

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Publication number
EP0883676B1
EP0883676B1 EP97903331A EP97903331A EP0883676B1 EP 0883676 B1 EP0883676 B1 EP 0883676B1 EP 97903331 A EP97903331 A EP 97903331A EP 97903331 A EP97903331 A EP 97903331A EP 0883676 B1 EP0883676 B1 EP 0883676B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
cleaning solution
hydroxide
edta
alkali
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.)
Expired - Lifetime
Application number
EP97903331A
Other languages
German (de)
English (en)
Other versions
EP0883676A2 (fr
Inventor
Anja Patten
Ralf Krack
Dietmar Rossner
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.)
Ecolab GmbH and Co oHG
Original Assignee
Henkel Ecolab GmbH and Co KG
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 Ecolab GmbH and Co KG filed Critical Henkel Ecolab GmbH and Co KG
Publication of EP0883676A2 publication Critical patent/EP0883676A2/fr
Application granted granted Critical
Publication of EP0883676B1 publication Critical patent/EP0883676B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/044—Hydroxides or bases
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0056—Lavatory cleansing blocks
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2086—Hydroxy carboxylic acids-salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/06—Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines

Definitions

  • the invention relates to a method for cleaning plants Food industry using an alkaline detergent solution Membrane filtration is regenerated, with the permeate being recycled.
  • EDTA ethylenediaminetetraacetic acid
  • the used cleaning solution again via membrane filtration systems work up. To do this, part of the cleaning solution is removed from a collection container discharged into a buffer tank and from there in a circle via a membrane system pumped, the filtration taking place in cross flow.
  • Such a thing Processing method is known from WO 95/27681 A1. That from water and sodium hydroxide solution existing permeate becomes the collection container for the Cleaning solution returned.
  • In the buffer tank of the membrane cleaning system accumulate the organic contaminants that are taken from time to time to dispose of them.
  • the invention is based on the object a process for cleaning plants in the food industry at the beginning Provide mentioned type, which is a significantly more economical cleaning than enabled in the prior art.
  • This object is achieved by a method for cleaning plants Food industry using an alkaline detergent solution Regeneration of the nanomembrane filtration, recycling the permeate, characterized in that one uses a cleaning solution, the Hydroxide component exclusively from potassium hydroxide solution or from a mixture of potassium hydroxide solution and another alkali, in particular sodium hydroxide solution, with at least 20% by weight Potassium hydroxide solution, calculated as hydroxide and based on the total in the The hydroxide solution contained in the cleaning solution.
  • the inventors have found that a partial or complete replacement of sodium hydroxide with potassium hydroxide performance membrane system increases by at least 10 to 50%.
  • the performance relates here on the permeate flows reached. This allows the plant investment and reduce the energy consumption of the membrane filtration system. Higher concentrations of the separated dirt load are possible, so that the Reduced the amount of dirt and the yield of regenerated lye is increased.
  • the performance of the membrane filtration system is also increased by replacing the sodium salts with potassium salts. Disadvantages that occur during filtration through the use of EDTA can be compensated for or simply overcompensated by simply using potassium hydroxide solution and EDTA in the form of the free acid or its potassium salt. Use of the disodium salt of EDTA is also possible if the sodium ion content in the lye does not exceed certain limits. If all alkali metal ions are calculated as alkali hydroxide, the potassium hydroxide solution in the base, based on the total amount of hydroxide in the cleaning base, must not drop below 20% by weight. In general, the performance of the filtration system increases with the ratio of potassium to sodium ions in the cleaning liquor, which means that sodium-free cleaning solutions give the highest flow rates in l / m 2 h.
  • the cleaning solution preferably contains a mixture of potassium hydroxide solution and another alkali, preferably sodium hydroxide solution, with at least 50% by weight of potassium hydroxide solution, calculated and related as mentioned above.
  • the advantage of the EDTA-free cleaning solution with at least 50% by weight potassium hydroxide solution lies in the possibility of immediately removing the filtered impurities Post-treatment as animal feed, e.g. B. as pig feed, because a increased salinity in the case of potassium salts rather than an increased sodium salt content can be tolerated.
  • the cleaning solution contains additives that are all suitable as additives for animal feed.
  • physiologically harmless cleaning enhancer which in the known cleaning agents not used, especially phosphates, Gluconates and / or food defoamers and emulsifiers suggested.
  • the cleaning liquor contains, in addition to the hydroxide constituents, additives which are in the form of potassium salts.
  • the performance of the membrane filtration system can be additionally increased in this case. If the permeate flow in a conventional sodium hydroxide-based cleaning solution such. B. is 50 l / m2 h, this performance is increased to 70 l / m 2 h by replacing the sodium hydroxide solution with potassium hydroxide solution. If the cleaning liquor also contains potassium tripolyphosphate as a cleaning booster, the permeate flow also increases to 74 l / m 2 h.
  • Another advantage of these additives in the form of potassium salts is that particularly suitable as an animal feed additive.
  • the method according to the invention can be used advantageous for plants in the food industry that use a regeneration system for used cleaning liquors.
  • the use of the cleaning liquor in systems of the Dairy farming since the concentrate obtained without further treatment as Animal feed can be used. Diafiltration or another additional Refurbishment is usually not necessary. Not only is there an elaborate process Dispose of the separated contaminants, but this "Impurities" represent a new resource. Should the increased salt content however, they can be reduced by means of diafiltration Refurbishment in the case of the cleaning process according to the invention perform much faster and therefore more economically.
  • EDTA falls with a much lower one Residual contamination content.
  • the filtered EDTA can again with alkali converted into a soluble form and, for example, the permeate from the Nanofiltration can be added. Since certain portions of EDTA both in the felled Sludge as well as in the solution from which it has been precipitated can be removed Using this method, 80 - 90% of the EDTA originally used can be recycled.
  • the filtered dirt is not due to its residual EDTA content more usable as cattle feed.
  • the cleaning liquor is regenerated preferably alkali-resistant nanofiltration membranes with a D value from 100 to 2000 daltons.
  • Such membranes are for molecules with permeable to a molecular weight up to the stated D value, but hold Molecules with higher molecular weights return.
  • membrane filtration is operated in cross flow with a transmembrane Pressure difference from 8 to 25 bar.
  • Cleaning dairy equipment uses a cleaning solution that in addition to the hydroxide components contains only additives that as Additives for animal feed are suitable, and that one in membrane filtration resulting concentrate used as animal feed or additive to animal feed.
  • a concentrate with a particularly high potassium content is much better than Concentrates with high sodium levels for use as animal feed, e.g. B. as Pig feed suitable. Therefore, it is also proposed that the hydroxide components the cleaning solution consist exclusively of potassium hydroxide solution.
  • the liquor which contains about 2 wt is tempered, fed to the systems to be cleaned, tanks, pipelines, etc., which are identified in FIG. 1 by reference number 2.
  • the cleaning liquor is circulated.
  • the contamination of the cleaning solution that accumulates over time are removed with the preparation part shown on the right in FIG.
  • To part of the cleaning liquor is discharged into the buffer tank 4 via a line 3.
  • This portion of the cleaning liquor is circulated via a pressure pump 5 and a membrane module 6 driven in the circuit.
  • Accumulating and settling contaminants are over from time to time taken a line 7.
  • the permeate emerging from the membrane module is returned to the collecting tank 1 via the return line 8.
  • the permeate flow was 50 l / hm 2 .
  • the permeate flow was 50 l / hm 2 .

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Health & Medical Sciences (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Detergent Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (15)

  1. Procédé de nettoyage d'installations de l'industrie alimentaire utilisant une lessive de nettoyage alcaline qui est régénérée au moyen d'une nanofiltration à membrane, dans lequel on réintroduit le produit de perméation,
    caractérisé en ce qu'
    on utilise une lessive de nettoyage dont le constituant hydroxyde se compose exclusivement de lessive de potasse ou d'un mélange de potasse et d'une autre base avec au moins 20 % en poids de lessive de potasse, cette valeur étant calculée sous forme d'hydroxyde et par rapport à l'ensemble de la quantité d'hydroxyde contenue dans la lessive de nettoyage.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la lessive de nettoyage contient un mélange de lessive de potasse et d'une autre base avec au moins 50 % de lessive de potasse, calculé et compris comme dans la revendication 1.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    la lessive de nettoyage contient comme autre base de la lessive de soude.
  4. Procédé selon la revendication 1,
    caractérisé en ce que
    la lessive de nettoyage contient, comme constituant hydroxyde, exclusivement de la lessive de potasse.
  5. Procédé selon une ou plusieurs des revendications 1 à 4,
    caractérisé en ce qu'
    on utilise pour nettoyer les installations de l'industrie laitière une lessive de nettoyage qui contient, outre les constituants hydroxydes, exclusivement des additifs qui conviennent comme additifs pour l'alimentation animale, et en ce qu'on utilise le concentré apparaissant lors de la filtration à membrane comme aliment pour animaux ou additifs aux aliments pour animaux.
  6. Procédé selon la revendication 5,
    caractérisé en ce que
    la lessive de nettoyage contient comme additifs des phosphates, des gluconates et/ou des antimousses et émulsifiants admissibles pour les aliments.
  7. Procédé selon la revendication 5 ou 6,
    caractérisé en ce que
    la lessive de nettoyage contient, outre des constituants hydroxydes, des additifs qui sont présents sous forme de sels de potassium.
  8. Procédé selon une ou plusieurs des revendications 1 à 7,
    caractérisé en ce que
    la lessive de nettoyage contient, outre les constituants hydroxydes, de l'acide éthylène diamine tétraacétique (EDTA).
  9. Procédé selon la revendication 8,
    caractérisé en ce qu'
    on utilise l'EDTA sous la forme de l'acide libre ou d'un sel de potassium.
  10. Procédé selon la revendication 8,
    caractérisé en ce qu'
    on utilise le sel disodique de l'EDTA, la teneur en lessive de potasse, lorsqu'on compte tous les ions de métaux alcalins comme hydroxydes, par rapport à l'ensemble de la quantité d'hydroxyde contenue dans la lessive de nettoyage, s'élève à au moins 20 % en poids.
  11. Procédé selon une ou plusieurs des revendications 8 à 10,
    caractérisé en ce qu'
    on récupère l'EDTA à partir des concentrés obtenus dans la nanofiltration de lessive de nettoyage, par précipitation fractionnée et filtration de la plus grande partie de la salissure avant la précipitation de l'EDTA, et on l'ajoute, après dissolution avec de la lessive alcaline, au produit de perméation de la nanofiltration.
  12. Procédé selon l'une ou plusieurs des revendications 1 à 11,
    caractérisé en ce qu'
    on utilise pour la régénération de la lessive de nettoyage des membranes de nanofiltration résistantes aux bases ayant une valeur de D comprise entre 100 et 2000 daltons.
  13. Procédé selon une ou plusieurs des revendications 1 à 12,
    caractérisé en ce qu'
    on fait fonctionner la filtration à membrane dans un courant transversal avec une différence de pression transmembranaire de 8 à 25 bars.
  14. Utilisation d'une lessive de nettoyage selon une ou plusieurs des revendications 1 à 13 pour les installations de l'industrie alimentaire, ces installations étant équipées d'un dispositif de régénération au moyen d'une nanofiltration pour lessives de nettoyage usées.
  15. Utilisation d'une lessive de nettoyage selon la revendication 14 pour les installations de l'industrie laitière.
EP97903331A 1996-03-01 1997-02-20 Nettoyant pour installations de l'industrie alimentaire, son utilisation et procede de nettoyage de ces installations Expired - Lifetime EP0883676B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19607800A DE19607800A1 (de) 1996-03-01 1996-03-01 Reinigungsmittel für Anlagen der Lebensmittelindustrie, seine Verwendung und Verfahren zum Reinigen dieser Anlagen
DE19607800 1996-03-01
PCT/EP1997/000799 WO1997032000A2 (fr) 1996-03-01 1997-02-20 Nettoyant pour installations de l'industrie alimentaire, son utilisation et procede de nettoyage de ces installations

Publications (2)

Publication Number Publication Date
EP0883676A2 EP0883676A2 (fr) 1998-12-16
EP0883676B1 true EP0883676B1 (fr) 2001-04-25

Family

ID=7786862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97903331A Expired - Lifetime EP0883676B1 (fr) 1996-03-01 1997-02-20 Nettoyant pour installations de l'industrie alimentaire, son utilisation et procede de nettoyage de ces installations

Country Status (14)

Country Link
US (1) US6204231B1 (fr)
EP (1) EP0883676B1 (fr)
JP (1) JP2000506910A (fr)
AT (1) ATE200792T1 (fr)
AU (1) AU714812B2 (fr)
BR (1) BR9707898A (fr)
CA (1) CA2248080A1 (fr)
DE (2) DE19607800A1 (fr)
DK (1) DK0883676T3 (fr)
ES (1) ES2156360T3 (fr)
GR (1) GR3035881T3 (fr)
NO (1) NO983115L (fr)
NZ (1) NZ331625A (fr)
WO (1) WO1997032000A2 (fr)

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* Cited by examiner, † Cited by third party
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DE19726287A1 (de) 1997-06-20 1998-12-24 Henkel Ecolab Gmbh & Co Ohg Verfahren zum Waschen von Wäsche, insbesondere von Berufsbekleidung
US7909179B2 (en) * 2005-08-16 2011-03-22 Ge Osmonics, Inc. Modified polyamide matrices and methods for their preparation
US7575687B2 (en) * 2005-08-16 2009-08-18 Ge Osmonics, Inc. Membranes and methods useful for caustic applications
US20100151094A1 (en) * 2008-12-16 2010-06-17 Choudhury Gour S Methods, apparatuses, and systems for the removal of peels from agricultural produce
PL2859074T3 (pl) * 2012-06-07 2021-09-13 Diversey, Inc. Kompozycje i sposoby czyszczenia, dezynfekcji i odkażania neutralne w odniesieniu do ścieków
US8835140B2 (en) 2012-06-21 2014-09-16 Ecolab Usa Inc. Methods using peracids for controlling corn ethanol fermentation process infection and yield loss
PT3156475T (pt) * 2015-10-16 2018-10-19 Georg Hagleitner Hans Concentrado de limpeza líquido
GB201801230D0 (en) * 2018-01-25 2018-03-14 Univ Leuven Kath Cross-linked nanofiltration membranes

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Also Published As

Publication number Publication date
DE19607800A1 (de) 1997-09-04
JP2000506910A (ja) 2000-06-06
WO1997032000A2 (fr) 1997-09-04
DK0883676T3 (da) 2001-08-13
ATE200792T1 (de) 2001-05-15
DE59703437D1 (de) 2001-05-31
EP0883676A2 (fr) 1998-12-16
AU714812B2 (en) 2000-01-13
US6204231B1 (en) 2001-03-20
BR9707898A (pt) 1999-07-27
GR3035881T3 (en) 2001-08-31
NO983115L (no) 1998-07-06
AU1792997A (en) 1997-09-16
CA2248080A1 (fr) 1997-09-04
WO1997032000A3 (fr) 1997-12-11
NZ331625A (en) 1999-11-29
ES2156360T3 (es) 2001-06-16

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