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EP1213345B1 - Procédé de nettoyage humide pour articles - Google Patents

Procédé de nettoyage humide pour articles Download PDF

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Publication number
EP1213345B1
EP1213345B1 EP01128900A EP01128900A EP1213345B1 EP 1213345 B1 EP1213345 B1 EP 1213345B1 EP 01128900 A EP01128900 A EP 01128900A EP 01128900 A EP01128900 A EP 01128900A EP 1213345 B1 EP1213345 B1 EP 1213345B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
predetermined conditions
liquid
water
cleaning liquid
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
EP01128900A
Other languages
German (de)
English (en)
Other versions
EP1213345A1 (fr
Inventor
Oskar Dr. Wack
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.)
Drok Wack Chemie GmbH
Original Assignee
Drok Wack Chemie GmbH
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 Drok Wack Chemie GmbH filed Critical Drok Wack Chemie GmbH
Publication of EP1213345A1 publication Critical patent/EP1213345A1/fr
Application granted granted Critical
Publication of EP1213345B1 publication Critical patent/EP1213345B1/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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5022—Organic solvents containing oxygen
    • 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

Definitions

  • the invention relates to a method for the liquid cleaning of objects.
  • cleaning tasks be it to clean objects made of metal, glass, ceramic, plastic or composite contaminants for reuse of the objects in a clean state, for example in the hospital or household sector, be it for cleaning objects within manufacturing processes where process engineering, such as painting, soldering, welding, etc., requires clean surfaces, or to clean textiles, to name just a few examples.
  • process engineering such as painting, soldering, welding, etc.
  • textiles to name just a few examples.
  • contaminants such as inorganic dirt, such as pigment dirt or dirt with ionic salts, which is well removed from water, organic dirt in the form of residues of food, fats, lapping and polishing pastes, solder pastes, adhesives, etc., and a variety Combinations of the types of dirt mentioned by way of example.
  • the invention has for its object to provide a method for the liquid cleaning of objects, are achieved with the excellent cleaning effects and in which the amount of required solvent or solvents or organic components is further reduced.
  • the invention uses the known from the above-mentioned DE 199 08 434 A1 knowledge that cleaning fluids with at least two components that are tuned to the respective pollution, then clean particularly efficient, if the two components under certain first conditions, for example, under certain pressure and Temperature conditions, in the existing concentrations form a miscibility gap.
  • miscibility gap forms two liquids if they are not infinitely miscible with each other; This gives two liquid phases in which the components of the liquid are present in different compositions, for example, the one component is largely in one phase and the other component is largely in the other phase.
  • a miscibility gap can be manifested by the fact that the clear liquid becomes turbid with a temperature change or forms an emulsion which indicates the phase separation.
  • the haze or emulsion is not a necessary indication of a miscibility gap;
  • microemulsions in which the two phases are so finely distributed that the liquid is optically still clear.
  • a liquid composed of two components in the state of a miscibility gap generally has a better detergency than the two individual components when they are used in pure or high concentration successively. It is possible that the superior cleaning effect of liquids in the state of a miscibility gap is due to interactions at the interfaces between the two phases and possibly additional mechanical effects due to the often by means of ultrasound or agitator in clear motion conditioned droplets conditioned.
  • the use of the liquid in the state of the miscibility gap thus enables both a cleaning effect as well as with regard to the duration and in terms of the required amounts of the individual components advantageous cleaning.
  • the cleaning liquid can remain in use for as long as possible, it must be freed from the impurities absorbed by it.
  • this is achieved by the cleaning liquid being changed from the state of the miscibility gap to the state of a true mixture, i. a homogeneous state is brought.
  • the contaminants can be removed by a filter depending on the nature (in particular, inorganic, pigment-containing contaminants) or the fact that the contaminants accumulate due to their density different from the liquid at the bottom or on the surface of the liquid and are withdrawn from there (especially greasy soiling).
  • a filter depending on the nature (in particular, inorganic, pigment-containing contaminants) or the fact that the contaminants accumulate due to their density different from the liquid at the bottom or on the surface of the liquid and are withdrawn from there (especially greasy soiling).
  • a filter depending on the nature (in particular, inorganic, pigment-containing contaminants) or the fact that the contaminants accumulate due to their density different from the liquid at the bottom or on the surface of the liquid and are withdrawn from there (especially greasy soil
  • the composition of the cleaning liquid is adapted to the respective cleaning problem, wherein it is only mandatory to select those components which form a miscibility gap under first predetermined conditions and mix under second predetermined conditions.
  • the advantage is achieved that both inorganic and organic soil can be solved, the organic component may often be present in relatively small concentration and still cleans as if it were present in high concentration.
  • a very good cleaning action for a wide range of types of soiling is achieved with the features of claim 3, wherein numerous organic components having molecules with lipophilic and hydrophilic groups form a miscibility gap with water.
  • a cleaning method is provided in which the cleaning liquid consists for the most part of water.
  • the method according to claim 6 is particularly advantageous because the cleaning effect at higher temperature is usually better than at low temperature.
  • the claim 7 indicates an embodiment of the method, which is particularly effective with respect to the separation of dirt from the cleaning liquid.
  • the inventive method is particularly suitable for all liquid cleaning, where no chemical reaction between the pollution and the cleaning liquid takes place, which changes the molecular composition of the cleaning liquid.
  • the cleaning liquid in the state of the miscibility gap is a medium with which contaminants are effectively transferred from the contaminated surface to the cleaning liquid.
  • the conversion of the cleaning liquid from the state of the miscibility gap to the state of the homogeneous mixture is the key to effectively removing the contaminants from the liquid contained in the cleaning liquid.
  • the cleaning liquid advantageously used to clean such articles contains water and an organic component in relative amounts of (100-x ) Wt .-%: x wt .-%, wherein x in the range 0 ⁇ 35, preferably in the range 3 ⁇ x ⁇ 25, particularly preferably in the range 4 ⁇ x ⁇ 15.
  • the organic component preferably contains molecules with hydrophilic and lipophilic groups.
  • the cleaning liquid contains 90% by weight of water and 10% by weight of glycol ether, preferably dipropylene glycol mono-n-propyl ether.
  • the predetermined cleaning liquid is contained in a cleaning tank 2 from which a line 6 provided with a flow rate control pump 4 leads into a separation tank 8.
  • the separating vessel 8 is connected via an overflow 9 to a collecting container 10, from which a return line 14 provided with a pump 12 leads through a filter device 16 back to the cleaning container 2.
  • an agitator 16 for example, a stirrer and / or an ultrasonic device included.
  • Each of the containers 2, 8 and 10 is provided with its own tempering device 18, by means of which the temperatures of the containers can be kept independently of one another at a predetermined value.
  • Above the cleaning container 2 is a transport device 20 for receiving the objects to be cleaned.
  • the above-described cleaning liquid is optically clear at room temperature, i. the organic component forms a real mix with the water.
  • the cleaning fluid is heated to 40 °, turbidity sets in, indicating that the solubility of the organics component in the water has been exceeded and a two-phase system is forming, with organically rich droplets in a continuous aqueous phase.
  • the cleaning container 2 is maintained at a temperature of 40 ° and the cleaning liquid in it is intensively swirled with the agitator 16.
  • the transport device 20 is lowered into the cleaning container 2, so that the objects to be cleaned come into intensive contact with the cleaning liquid located in the state of the miscibility gap.
  • the cleaning liquid is pumped out continuously by means of the pump 4 in the separation vessel 8, which is maintained at a temperature of only 20 °, so that the contaminated cleaning liquid is present there in the state of the real mixture.
  • Organic dirt which is specifically lighter than the liquid settles on the surface and can be removed with a rake 22 or other means. Specifically heavier dirt settles on the bottom of the separation vessel 8 and can be withdrawn there by means not shown, known per se.
  • the cleaning liquid passes through the overflow 9 in the collecting container 10, which is also held at 20 °, so that the cleaning liquid in the state of the mixture remains.
  • the cleaning liquid is pumped out with the pump 12 and flows through a filter device 19, is removed in the inorganic or particle dirt by filtering.
  • the cleaned in this way of contamination cleaning liquid gets back into the cleaning container 2, where it comes again in contact with the objects to be cleaned.
  • the cleaning process lasts until the objects are freed from all dirt, whereupon the transport device 20 is removed from the cleaning container 2.
  • the described device can be modified in many ways.
  • the transport device 20 can subsequently still be moved into a rinsing container with hot water and / or a drying container.
  • the cleaning liquid does not necessarily have to be pumped continuously, but the removal of the impurities absorbed by it can be done batchwise.
  • the cleaning liquid serves as a transport medium for the impurities by removing them from the objects in the cleaning container 2 and receiving, then discharges in the separation vessel 8 by deposition and emits in the filter device 19 by filtering.
  • the described system can be modified to the effect that, for example, in a dishwasher or washing machine in the cleaning container, the method described above, the cleaning liquid is pumped out of the cleaning tank in a buffer tank, where it is stored, while in the cleaning tank run only rinsing. Subsequently, the cleaning liquid for cleaning other objects can be pumped back into the cleaning tank. In this way, the cleaning liquid can be used several times to clean objects and must only be sharpened occasionally. The separated impurities can be removed with the rinse water.
  • the miscibility gap at room temperature is between 5% and 82% glycol ethers in 95% and 18% water, respectively.
  • MPC Multi Phase Cleaning
  • the concentration of the organic component which is advantageously used in the respective liquid, and the temperature above the due to the stable miscibility gap a good Cleaning effect is achieved.
  • the liquid is advantageously cooled to room temperature. It is interesting that with Concentrations are worked, the slight, z. B. 0.1 to 0.2% below the concentration at which the miscibility gap begins at room temperature.
  • glycol ethers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (7)

  1. Procédé pour le nettoyage par un liquide d'objets au moyen d'un liquide de nettoyage qui comprend au moins deux composants qui forment dans des premières conditions prédéterminées un manque de mélange et dans des secondes conditions prédéterminées un mélange, comprenant les étapes suivantes :
    - le réglage des premières conditions prédéterminées,
    - le nettoyage par un liquide des objets avec le liquide de nettoyage se trouvant dans les premières conditions prédéterminées,
    - le réglage des secondes conditions prédéterminées et
    - au moins une séparation partielle des saletés du liquide se trouvant dans les secondes conditions prédéterminées.
  2. Procédé selon la revendication 1, où un composant est de l'eau et l'autre composant est un composant organique.
  3. Procédé selon la revendication 2, où les composants organiques comprennent des molécules avec des groupes lipophiles et des groupes hydrophiles.
  4. Procédé selon la revendication 2 ou 3, où le liquide de nettoyage dans les premières conditions prédéterminées forme un système à deux phases avec une phase aqueuse continue comportant des gouttelettes d'une phase riche en composant organique.
  5. Procédé selon une des revendications 1 à 4, où les premières conditions prédéterminées se différencient des secondes conditions prédéterminées par la température.
  6. Procédé selon la revendication 5, où les températures des premières conditions prédéterminées sont supérieures aux températures des secondes conditions
  7. Procédé selon une des revendications 1 à 6, où la séparation des saletés du liquide se trouvant dans les secondes conditions prédéterminées se déroule par précipitation et/ou filtrage.
EP01128900A 2000-12-07 2001-12-05 Procédé de nettoyage humide pour articles Expired - Lifetime EP1213345B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10060891A DE10060891C1 (de) 2000-12-07 2000-12-07 Verfahren zum Flüssigreinigen von Gegenständen
DE10060891 2000-12-07

Publications (2)

Publication Number Publication Date
EP1213345A1 EP1213345A1 (fr) 2002-06-12
EP1213345B1 true EP1213345B1 (fr) 2006-03-01

Family

ID=7666187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01128900A Expired - Lifetime EP1213345B1 (fr) 2000-12-07 2001-12-05 Procédé de nettoyage humide pour articles

Country Status (3)

Country Link
US (1) US6811616B2 (fr)
EP (1) EP1213345B1 (fr)
DE (2) DE10060891C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107051985A (zh) * 2017-05-12 2017-08-18 成都大漠石油技术有限公司 用于清洗运输石油的矩形钢管污渍的设备

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060891C1 (de) * 2000-12-07 2002-07-25 Wack O K Chemie Gmbh Verfahren zum Flüssigreinigen von Gegenständen
US6938439B2 (en) * 2003-05-22 2005-09-06 Cool Clean Technologies, Inc. System for use of land fills and recyclable materials
DE10324105B4 (de) * 2003-05-27 2006-06-14 Dr. O.K. Wack Chemie Gmbh Verfahren und Vorrichtung zum Flüssigreinigen von Gegenständen
US20070228600A1 (en) * 2005-04-01 2007-10-04 Bohnert George W Method of making containers from recycled plastic resin
US7253253B2 (en) 2005-04-01 2007-08-07 Honeywell Federal Manufacturing & Technology, Llc Method of removing contaminants from plastic resins
US20100236580A1 (en) * 2007-05-15 2010-09-23 Delaurentiis Gary M METHOD AND SYSTEM FOR REMOVING PCBs FROM SYNTHETIC RESIN MATERIALS
CN101755212B (zh) * 2007-07-18 2013-11-06 贝克曼考尔特公司 搅拌判断装置、搅拌判断方法和分析装置
US20090155437A1 (en) * 2007-12-12 2009-06-18 Bohnert George W Continuous system for processing particles
DE102010000529A1 (de) 2010-02-24 2011-08-25 Amazonen-Werke H. Dreyer GmbH & Co. KG, 49205 Schleuderstreuer
CA2807599A1 (fr) * 2010-12-16 2012-06-21 Kyzen Corporation Agent de nettoyage pour l'elimination de flux de brasage tendre
CN105478410B (zh) * 2015-12-30 2017-07-07 郑州运达造纸设备有限公司 一种液体逆流漂洗设备
DE102016109861A1 (de) * 2016-05-30 2017-11-30 EMO Oberflächentechnik GmbH Verfahren und Vorrichtung zur Reinigung von industriell gefertigten Teilen

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US142452A (en) * 1873-09-02 Improvement in air-compressors
US914458A (en) * 1908-08-24 1909-03-09 August R Rieger Removable brake and guard for roller-skates.
GB9017841D0 (en) * 1990-08-14 1990-09-26 Bush Boake Allen Ltd Methods and compositions for cleaning articles
EP0587917B1 (fr) * 1992-08-07 1995-01-04 DR.O.K. WACK CHEMIE GmbH Agent de nettoyage
JPH06108097A (ja) * 1992-08-07 1994-04-19 Dr Ok Wack Chem Gmbh 洗浄剤
JPH06226245A (ja) * 1993-01-27 1994-08-16 Dr Ok Wack Chem Gmbh すすぎ浴剤に溶解している液剤の再生方法
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DE4421954A1 (de) * 1994-06-23 1996-01-04 Wack O K Chemie Gmbh Verfahren zum Abtrennen einer ersten Flüssigkeit von einer zweiten Flüssigkeit, sowie Vorrichtung hierfür
JP3256630B2 (ja) * 1994-06-24 2002-02-12 株式会社トクヤマ 洗浄方法
US5876510A (en) * 1995-03-09 1999-03-02 The Dow Chemical Company Process for cleaning articles
GB9505055D0 (en) * 1995-03-09 1995-05-03 Dow Europ Sa Cleaning process and apparatus
US5741368A (en) * 1996-01-30 1998-04-21 Silicon Valley Chemlabs Dibasic ester stripping composition
WO1997032963A1 (fr) * 1996-03-08 1997-09-12 Dr. O.K. Wack Chemie Gmbh Procede pour le nettoyage d'objets
DE19609119C2 (de) * 1996-03-08 1999-08-26 Wack O K Chemie Gmbh Verfahren zum Reinigen von Gegenständen
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US6569252B1 (en) * 2000-06-30 2003-05-27 International Business Machines Corporation Semi-aqueous solvent cleaning of paste processing residue from substrates
DE10060891C1 (de) * 2000-12-07 2002-07-25 Wack O K Chemie Gmbh Verfahren zum Flüssigreinigen von Gegenständen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107051985A (zh) * 2017-05-12 2017-08-18 成都大漠石油技术有限公司 用于清洗运输石油的矩形钢管污渍的设备

Also Published As

Publication number Publication date
US6811616B2 (en) 2004-11-02
DE50109057D1 (de) 2006-04-27
EP1213345A1 (fr) 2002-06-12
US20020189644A1 (en) 2002-12-19
DE10060891C1 (de) 2002-07-25

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