WO1997032963A1 - Procede pour le nettoyage d'objets - Google Patents

Procede pour le nettoyage d'objets Download PDF

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Publication number
WO1997032963A1
WO1997032963A1 PCT/EP1997/001192 EP9701192W WO9732963A1 WO 1997032963 A1 WO1997032963 A1 WO 1997032963A1 EP 9701192 W EP9701192 W EP 9701192W WO 9732963 A1 WO9732963 A1 WO 9732963A1
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WO
WIPO (PCT)
Prior art keywords
cleaning
azeotropic
water
preparation
objects
Prior art date
Application number
PCT/EP1997/001192
Other languages
German (de)
English (en)
Inventor
Oskar K. Wack
Martin Hanek
Karsten Lessmann
Original Assignee
Dr. O.K. 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26023617&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1997032963(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19609119A external-priority patent/DE19609119C2/de
Application filed by Dr. O.K. Wack Chemie Gmbh filed Critical Dr. O.K. Wack Chemie Gmbh
Priority to EP97914208A priority Critical patent/EP0885287A1/fr
Publication of WO1997032963A1 publication Critical patent/WO1997032963A1/fr

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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
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • C11D7/3227—Ethers thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • 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
    • C11D7/5031—Azeotropic mixtures of non-halogenated solvents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam

Definitions

  • the present invention relates to a method for cleaning objects and materials made of metal, glass, ceramic, plastic (s) or composite materials thereof or textiles.
  • Cleaning methods in which a vapor produced by heating a cleaning-active liquid is brought into contact with the objects to be cleaned are used for cleaning a wide variety of objects, such as metallic objects, industrially manufactured objects, such as printed circuit boards, articles of clothing, etc., of undesired ones Impurities such as greases, lapping and polishing pastes, soldering pastes, adhesives, mixtures of inorganic (for example salt-like) and organic (for example consisting of fat residues) dirt etc.
  • chlorinated hydrocarbons have been used until recently for such cleaning tasks. Because of their lack of environmental compatibility, in particular because of their ozone depletion potential, their carcinogenicity and their toxic effect, these have now been banned or at least can only be used under very strict conditions.
  • chlorinated hydrocarbons were used to make them do not have a flash point at temperatures which usually occur. Because of the above disadvantages, they have been replaced by other hydrocarbons or solvents such as polypropylene glycol ether, alcohols, acetone, etc. These have a flash point in the range of normally occurring temperatures and are therefore at risk of ignition. They also have a disadvantage in that they scarcely remove pigment dirt or dirt with ionic salts, since these solvents only very poorly dissolve pigments or salts owing to their ionic character.
  • the invention was based on the object of developing a generic cleaning method in such a way that it can be carried out in an environmentally compatible manner while achieving a good cleaning effect.
  • a further object of the invention was to provide a new cleaning method with which mixtures of inorganic and organic dirt can be removed efficiently at the same time.
  • Another object of the invention was to provide a method for cleaning objects and materials made of metal, which works more gently than previously known methods.
  • Azeotropic preparations which can be used according to the invention as cleaning-active liquids initially have the advantage that their liquid phase dissolves pigment dirt and dirt well with ionic components, for example salts, because of the water content, if the azeotropic preparation used as cleaning-active liquid is in liquid state with the objects to be cleaned comes into contact.
  • the lipophilic group-containing molecules of the at least one further component which is preferably a liquid in itself under ambient conditions or at low treatment temperatures, ensure good fat-dissolving power of the azeotropic preparation.
  • the flash point of the vapor if such exists at all, is above the temperatures normally occurring in such a cleaning process, but at least above the sieving temperature of the liquid and advantageously above about 200 ° C.
  • a flash point above 200 ° C. is particularly advantageous because the protective measures to be taken when carrying out the cleaning process are less extensive than when using cleaning-active liquids with lower flash points.
  • the azeotropic preparation which is present in vapor form at least in part of the process according to the invention, can be condensed either on the objects to be cleaned or by lowering the temperature to the liquid phase, so that complex measures for protecting the atmosphere surrounding the device for carrying out the process, such as they are required in conventional processes, can largely be avoided.
  • An additional advantage of the method according to the invention is therefore that the azeotropic preparation used as the cleaning-active liquid is hardly used because of its extensive back condensation. A closed circuit can thus be created, in which the azeotropic preparation used as a cleaning-active liquid does not have to be filled in or only in negligibly small amounts. This is additionally supported by the fact that the azeotropic preparation used as cleaning-active liquid according to the invention can be free of surfactants, which settle on the filter surface when the cleaning-active liquid is filtered for dirt removal in conventional processes and require re-sharpening in the case of conventionally used solutions .
  • the method according to the invention also reliably removes complex types of dirt, such as dried-up body fluids or other dirt that occurs in everyday use, dirt caused by rain or snow, etc., from the objects to be cleaned.
  • the method according to the invention is not restricted to closed systems. For example, it can also be carried out in the form of an open steam jet cleaning.
  • the water content of the azeotrope of water and further component or further components must be so large that there is no flash point or the steam is not combustible.
  • the liquid and the steam formed from it by heating must neither be toxic nor have ozone depletion potential, nor may they pose a water hazard if the preparation accidentally gets into the environment.
  • Water-soluble, homogeneous azeotrope-forming components or water-insoluble, heterogeneous azeotrope-forming components are suitable.
  • the method according to the invention for cleaning objects comprises the steps of
  • the objects to be cleaned can first be brought into contact with the liquid azeotropic preparation once or several times, for example by immersion, spraying, sprinkling or comparable methods of applying a liquid which are known per se from the prior art.
  • the objects to be cleaned can then be brought into contact with the azeotropic preparation in the form of their vapor once or even several times.
  • the vapor of the azeotropic preparation regularly condenses on the objects to be cleaned and, when it expires, entrains residues removed from the objects to be cleaned.
  • the process according to the invention can be carried out by bringing the objects to be cleaned into contact with a vapor of the azeotropic preparation at least once, but preferably several times.
  • the steam condenses on the objects to be cleaned for the duration of the contact and thereby removes the impurities.
  • an azeotropic preparation of water and at least one component with molecules with hydrophilic and lipophilic groups is used, in which the weight ratio (component (s) with hydrophilic and lipophilic groups): water in the range of 1, 0 to 35.0: 99.0 to 65.0, more preferably in the range 4.0 to 15.0: 96.0 to 85.0.
  • an azeotropic preparation in the form of a mixture of water and at least one further component with molecules with hydrophilic and lipophilic groups is used as the cleaning-active liquid
  • the further (n) Component (s) and the water in the phase transition liquid phase / vapor phase form an azeotrope and the azeotrope an azeotrope with a miscibility gap at a temperature between 0 ° C. and the temperature of the Phase transition is liquid phase / vapor phase at normal pressure.
  • azeotropes with gaps in the mixture have particularly advantageous cleaning properties.
  • An azeotrope with a mixture gap at a temperature in the range from 20 ° C. and 110 ° C. at normal pressure is particularly preferably used.
  • At normal pressure is understood to mean an atmospheric pressure (about 1 atm; about 10 5 Pa).
  • azeotropic preparations which can be used as cleaning-active liquid in the process according to the invention are clear at low temperatures of, for example, 20 to 25 ° C. In other words: the components are completely detached from one another. At any temperature, there are defined ratios of the composition of the components in the mixing phase.
  • the phases present separately at elevated temperature can be converted into a milky-looking emulsion by suitable process steps, preferably for example by sonication with ultrasound, by intensive agitation during pumping or stirring, etc. This emulsion has discontinuous droplets of the organic component (s) in a continuous aqueous phase.
  • the emulsion has excellent fat-dissolving power due to its content of organic components (with molecules with lipophilic groups), but due to the continuous water phase also dissolves water-soluble, eg ionic, impurities, for example salts. If the temperature of the azeotropic preparation is increased further, it passes into the vapor phase in which the components are present in the special composition typical of the respective azeotrope. When condensing, the azeotropic preparation again migrates through the miscibility gap; the vapor of the azeotropic preparation which condenses on the objects to be cleaned is therefore again in the form of the emulsion which has excellent loose properties for both fatty and ionic impurities.
  • water-soluble, eg ionic, impurities for example salts.
  • organic components which form homogeneous azeotropes with water are preferred for use as organic components in the azeotropic preparations which are used to carry out the process according to the present invention.
  • the invention is not limited to the preferred azeotrope forming compounds.
  • R 1 and R 3 each independently represent H; straight-chain or branched saturated or unsaturated C r to C 18 alkyl groups in which one or more non-adjacent -CH 2 groups can be replaced by -O-; saturated or unge ⁇ saturated cyclic C, - to C 8 - alkyl groups in which one or more non benach ⁇ disclosed -CH 2 groups may be replaced by -O-; Hydroxy; C r to C 8 alkoxy; Amino, in which one or both of the hydrogens) can be replaced by C 1 -C 8 -alkyl groups; and
  • the organic components of the azeotropic preparations which are used in the process according to the present invention can be selected from organic compounds which belong to the groups alcohols, glycols, amines, ethers, glycol ethers, esters, ketones and amino alcohols as well as N-heterocycles or organic acids.
  • R 1 and R 3 are hydrogen, methyl, ethyl, n-propyl, i-propyl, n-butyl, sec-butyl, i-butyl, tert-butyl, n-pentyl, n-hexyl, n-octyl, furfuryl-2, tetrahydrofuryl-2, hydroxy, methoxy, ethoxy and propoxy.
  • organic component (s) of the azeotropic preparations or as further organic component (s) which are selected from the group
  • organic components which, alone or in groups of several of the compounds mentioned, together in azeotropic preparations of the cleaning-active Liquid that can be used are selected from propylene glycol ether; Dipropylene glycol monomethyl ether; Dipropylene glycol mono-n-propyl ether; Tripropylene glycol monomethyl ether; 3-methoxy-3-methylbutanol; Furfuryl alcohol; Tetrahydrofurfuryl alcohol; 1-aminobutanol-2; Monoisopropanolamine; 2-amino-2-methylpropanol-1; 2-amino-2-methylpropanediol-1,3; 3- (aminomethyl) pyridine; Ethanolamine; Furfurylamine; Methyl lactate; Isopropyl lactate; Aminoacetaldehyde dimethyl acetal; 4-aminomorpholine; 1-methyl imidazole; 1,2-dimethylimide azole; 1-vinylimidazole;
  • At least one cleaning booster which does not evaporate independently is added to the cleaning-active liquid for the process according to the invention.
  • Such non-self-evaporating cleaning amplifiers are known to the person skilled in the art from the prior art and therefore do not require any further listing at this point.
  • At least one corrosion protection additive to the cleaning-active liquid.
  • This (s) should preferably distill with the azeotropic preparation.
  • Corrosion protection additives of this type are particularly advantageous when objects made of non-ferrous metals or light metals are to be cleaned.
  • aluminum parts can be excellently cleaned with an azeotropic preparation comprising 1-methylimidazole. This acts as an inhibitor.
  • the cleaning of parts made of copper can also be carried out advantageously with azeotropic preparations comprising 1-methylimidazole. This lightens the surface.
  • other corrosion protection additives and inhibitors can also be added, as are known to the person skilled in the art from the prior art.
  • the cleaning-active fluids are liquid uses an azeotropic preparation of water and an organic component.
  • the organic component is preferably a compound which is selected from the group dipropylene glycol monomethyl ether; Dipropylene glycol mono-n-propyl ether; Tripropylene glycol monomethyl ether; 3-methoxy-3-methylbutanol; Furfuryl alcohol; Tetrahydrofurfuryl alcohol; l-aminobutanol-2; Furfurylamine; Methyl lactate and isopropyl lactate.
  • R 1 hydroxyethyl
  • R 3 iC 3 H 7
  • n 1;
  • x is in the range from 0 ⁇ x ⁇ 35, preferably in the range 3 x x ⁇ 25, particularly preferably in the range
  • the mixing ratio of water and the further component (s) in the azeotropic preparation is essentially adjusted to the ratio which is present in the vapor which is produced from the liquid azeotropic preparation when heated.
  • the method according to the invention for cleaning objects comprises the step of using an azeotropic preparation of water and two organic components as the cleaning-active liquid.
  • An azeotropic preparation of water, dipropylene glycol mono-n-propyl ether and another organic component is particularly preferably used as the cleaning-active liquid.
  • azeotropic preparation used as the cleaning-active liquid for example at least one non-self-evaporating, particularly preferably with the azeotropic preparation of distilling cleaning boosters, as is known as such from the prior art and has already been mentioned above, and / or at least one (with particular preference distilling with the azeotropic preparation) corrosion protection additive or corrosion protection Inhibitor as it is also known as such or from the prior art and has already been mentioned above.
  • DABCO octane
  • organic compounds mentioned can be used alone or in combination with one another.
  • a further organic component from the group consisting of acetic acid, hydroxyacetic acid, formic acid and butyric acid.
  • the acids mentioned can also be used alone or in combination with one another or with other, for example the above-mentioned, organic components.
  • the cleaning-active liquid used is an azeotropic preparation of water, a glycol ether (preferably dipropylene glycol mono-n-propyl ether) and a further organic component in relative amounts of 90% by weight: (10 - y )%
  • y% by weight in which y is in the range from 0 ⁇ y ⁇ 5, particularly preferably in the range from 0 ⁇ y ⁇ 2.
  • a device in which the method according to the invention can be carried out is shown schematically in the attached figure:
  • a storage tank 2 with a separation chamber 4 and an overflow chamber 6 is connected via a feed pump 8 and a heating device 10 a cleaning device 12 connected.
  • the interior of the cleaning device known per se in its construction, which can contain cleaning nozzles, a circumferential basket, etc., is connected in the example shown in the figure to a pressure compensation vessel 14, which, however, is not functionally essential.
  • a glue leads from the bottom of the cleaning device 12 to a filter device 16.
  • the filter device 16 is connected to the top of the separating chamber 4 by gluing with a feed pump 18.
  • Another line leads from the filter device 16 via a vacuum pump 20 through a condenser 22 and a cooler 24 back to the separation chamber 4.
  • a line leads from the overflow chamber 6 via a feed pump 26 through a heat exchanger 28 into a distillation device 30 and from there into the cleaning device 12 or back into the storage tank 2.
  • a feed line 32 leads into the storage tank 2 for charging the storage tank 2 with cleaning-active liquid.
  • the storage tank 2 further contains a device (not shown) for removing sludge, which settles in the separation chamber 4.
  • a ventilation line 34 leads into the normally tightly closed cleaning device 12.
  • liquid cleaning takes place first, in which the feed pump 8 is started and cleaning-active liquid which the heater 10 against can also be tempered, the cleaning device 12 is supplied.
  • the cleaning device 12 In the cleaning device 12 there is an immersion bath of the circulating items to be cleaned and / or the items to be cleaned are sprayed with liquid.
  • the liquid is drawn off from the cleaning device 12 through the filter device 16 by means of the feed pump 18 and fed to the separating chamber 4.
  • Predominantly inorganic dirt settles in the filter device 16 and is removed.
  • the separation chamber 4 mainly fatty dirt settles, which is also removed.
  • a steam cleaning stage or steam rinsing stage in which the feed pump 26 is started, so that the cleaning-active liquid in the distillation device 30 is heated and converted into steam.
  • this vapor has a predetermined content of water and the further component or components.
  • the liquid azeotropic preparation is preferably already composed of its components in such a way that this also corresponds to the content of the corresponding components in the vapor phase.
  • the steam comes into intensive contact with the material to be cleaned in the cleaning device 12, at least part of the steam condensing.
  • the condensate is fed into the separation chamber by means of the feed pump 18 after flowing through the filter device 16.
  • the separation chamber 4 is ventilated via the ventilation line 34, and the cleaned material can be removed.
  • the objects to be treated are sprayed in the cleaning device 12 with the azeotropic preparation used as the cleaning-active liquid. This is done in such a way that the objects to be cleaned are soaked in the liquid.
  • the subsequent process steps are essentially the same as those described above.
  • the objects to be treated are in a significantly better state after treatment than after treatment in a conventional process, i.e. using conventional organic solvents for the cleaning steps under identical conditions.
  • organic dirt including lipophilic or oil-like or fat-like substances
  • inorganic dirt in particular inorganic salts from sweat, color pigments, etc.
  • the treated articles have no unpleasant odor and show an excellent appearance.
  • azeotropic preparations with a miscibility gap show surprisingly good cleaning behavior which is clearly superior to conventional preparations.
  • azeotropic preparations with a miscibility gap are used, in the case of treatment in the liquid phase, the objects to be cleaned are brought into contact with an azeotropic preparation which is in a state in which the components of the azeotropic preparation are separated or at least partially separate phases
  • the liquid azeotropic preparations present in the state of phase separation are treated with ultrasound or intensively pumped around or stirred, so that a milky emulsion of the azeotropic preparations is formed.
  • This emulsion not only dissolves fat-like or oily components well, but also ionic or salt-like impurities.
  • the azeotropic preparation - as described above - is heated and a steam is produced in which the components are present in the proportions which are characterized by the characteristic azeotrope. Properties are determined.
  • the steam condenses at least partially on the objects to be cleaned, and the same milky emulsion is obtained as in the liquid phase. Excellent fat and salt dissolving power is also observed in this case.
  • the azeotropic preparation When the temperature of the azeotropic preparation increases to the phase transition from liquid phase to vapor phase, the components pass into the vapor phase in the quantitative ratio corresponding to the azeotrope, and the azeotropic preparation can be prepared by distillation without any problems.
  • the last-mentioned embodiment of the method according to the invention is particularly advantageous for cleaning metal parts.
  • azeotropes with a mixing gap lapping and polishing pastes can be excellently removed from metal parts.
  • an azeotropic preparation mixed with acidic additives is used as an active cleaning liquid. Cleaning takes place in the one-chamber system described above and can be carried out continuously or in a batch process.
  • SMD Survace Mount Devices
  • the adhesive is usually applied using dispenser systems or templates. brings before the circuit boards are attached.
  • Printed or dispensed PCBs or stencils can be cleaned.
  • the azeotropic preparations used according to the invention can surprisingly achieve cleaning results which significantly exceed those with conventional solvents such as butyl acetate or isopropanol.
  • protective measures for example against explosions in the case of correspondingly endangered solvents
  • the cleaning is carried out by spraying, spray rinsing and drying the objects to be cleaned, preferably in an immersion process using ultrasound (cleaning stage), rinsing with or without ultrasound (rinsing stage) and drying.
  • the cleaning is preferably carried out at a temperature in the range from 40 to 60 ° C., but is not restricted to this temperature range. In particular when treating the objects to be cleaned in the cleaning stage with the steam from the azeotropic preparation, the temperature can be significantly higher, for example also above 100 ° C.
  • Azeotropic preparations according to Table I below are particularly preferably used for cleaning processes according to the invention.
  • This table also gives the preferred ratios of organic components (O.K.): water, the boiling points of the respective azeotropic preparation and the temperatures at which objects to be cleaned can be treated as examples with the respective azeotropic preparation.
  • O.K. organic components
  • the invention is not restricted to the specified ratios of the components and treatment temperatures.
  • azeotropes with a mixture gap three-component mixtures of water, dipropylene glycol mono-n-propyl ether and amine compounds or N-heterocyclic compounds or organic acids according to the Table II below used.
  • An exemplary, but not restrictive, composition of the azeotropes is as follows: water (90% by weight), dipropylene glycol mono-n-propyl ether (10% by weight), y% by weight of those given in Table II Links.
  • Table II also shows the boiling point (° C.) of the azeotropic preparation formed from water, dipropylene glycol mono-n-propyl ether and the compounds indicated.
  • the drum of the cleaning device 12 described above was loaded with material to be cleaned.
  • the material consisting of textiles was treated in the first step under liquid cleaning conditions with azeotropic preparations at elevated temperatures.
  • the azeotropic preparations and the respective treatment temperatures are given in Table I above.
  • the material was immersed in the warm azeotropic preparation while moving.
  • the warm azeotropic preparation was carried out in a closed circuit from the drum of the cleaning device 12 via a filter device 16 and fed to the separation chamber 4.
  • Mainly inorganic dirt (salts) settled in the filter device 16 and was removed.
  • In the separation chamber 14 mainly fatty dirt settled, which was also removed.
  • the first treatment step was followed by a second treatment step, which was also carried out under liquid treatment conditions.
  • Fresh azeotropic preparation composition: see Table I; in each run the azeotropic preparation of the second treatment step had the same composition as that of the first step
  • the drum of the cleaning device 12 was fed at elevated temperature.
  • the material was fed in a second closed circuit from the drum to the cleaning device 12 via a filter device 16 to the separation chamber 4.
  • the separation of inorganic and organic substances was carried out in the same way as in the first treatment step.
  • the second treatment step was followed by a third treatment step, in which the material to be treated was treated with the steam of the respective azeotropic preparation. This had the composition typical for the respective azeotrope (see Table I).
  • the azeotropic preparation was transferred into a distillation device in the vapor phase.
  • the steam was brought into intimate contact with the material to be treated in the drum of the cleaning device 12. At the time of contact with the material, part of the vapor was condensed.
  • the liquid from the cleaning step after the condensation was removed from the drum and, after passing through the filter device 16, was passed to the separating chamber 4 for separating the organic substances, where organic contaminants were separated.
  • the material to be treated was in much better condition than material which had been treated in a conventional manner. Both inorganic and organic contaminants were completely removed. The material did not have an unpleasant smell and had an excellent appearance. It could be ironed or pressed with good results.
  • the third step is not absolutely necessary after liquid cleaning; the same good results as described above were achieved even without the steam treatment. It is also possible according to the invention to perform the steps of treating the material to be cleaned with liquid azeotropic preparation by means of steps of treatment to be replaced entirely or partially with vaporous azeotropic preparation. With this procedure, equally good cleaning results were achieved.
  • Misprinted printed circuit boards or stencils from SMD production were treated with a three-component mixture of water, dipropylene glycol mono-n-propyl ether or an amine compound or N-heterocyclic compound or organic acids, as can be seen from Table II is.
  • the three-component mixtures which were used as cleaning-active liquids consisted of 90% by weight of water, (10-y)% by weight of dipropylene glycol mono-n-propylene ether and y% by weight of one of the compounds listed in Table II. The cleaning was done by spraying.
  • the printed circuit boards or templates were treated with the liquid azeotropic preparations using ultrasound (however, ultrasound is not absolutely necessary to achieve good cleaning results).
  • the azeotropic preparations were in the form of a milky emulsion that became almost clear when ultrasound was applied.
  • the adhesive was removed completely without protective devices, for example for protection against explosions, having to be provided in the system.

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  • Chemical & Material Sciences (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)

Abstract

L'invention concerne un procédé pour le nettoyage d'objets, dans lequel les vapeurs produites par chauffage d'un liquide nettoyant sont amenées en contact avec les objets à nettoyer. Le procédé est caractérisé en ce qu'une préparation azéotrope sous la forme d'un mélange d'eau et d'au moins un autre constituant présentant des molécules avec des groupes hydrophiles et lipophiles est utilisée comme liquide nettoyant. Le ou les autres constituants et l'eau forment un azéotrope lors de la transition de la phase liquide à la phase vapeur.
PCT/EP1997/001192 1996-03-08 1997-03-10 Procede pour le nettoyage d'objets WO1997032963A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97914208A EP0885287A1 (fr) 1996-03-08 1997-03-10 Procede pour le nettoyage d'objets

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19609119.5 1996-03-08
DE19609119A DE19609119C2 (de) 1996-03-08 1996-03-08 Verfahren zum Reinigen von Gegenständen
US70523796A 1996-08-30 1996-08-30
US08/705,237 1996-08-30

Publications (1)

Publication Number Publication Date
WO1997032963A1 true WO1997032963A1 (fr) 1997-09-12

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Application Number Title Priority Date Filing Date
PCT/EP1997/001192 WO1997032963A1 (fr) 1996-03-08 1997-03-10 Procede pour le nettoyage d'objets

Country Status (3)

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EP (2) EP0885287A1 (fr)
DE (1) DE59710188D1 (fr)
WO (1) WO1997032963A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050555A1 (fr) * 1999-02-26 2000-08-31 Dr. O.K. Wack Chemie Gmbh Procede et nettoyant liquide pour nettoyer des objets par voie humide
EP1213345A1 (fr) * 2000-12-07 2002-06-12 DR.O.K. WACK CHEMIE GmbH Procédé de nettoyage humide pour articles
US6511546B1 (en) 1998-11-25 2003-01-28 Petroferm Inc. Aqueous cleaning
EP1700642A3 (fr) * 2005-03-11 2009-04-01 Pero Aktiengesellschaft P. Erbel Maschinen- und Apparatebau Procédé et dispositif pour le nettoyage d'objets avec l'aide d'un mélange azéotrope
US10899999B2 (en) 2016-02-18 2021-01-26 Ecolab Usa Inc. Solvent application in bottle wash using amidine based formulas

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2108464A1 (fr) 2008-04-09 2009-10-14 Dow Global Technologies Inc. Procédé de nettoyage d'articles
IT1395090B1 (it) * 2009-04-08 2012-09-05 Lasa Impianti Srl Apparecchiatura a basso impatto ambientale per il lavaggio di particolari metallici e non metallici che necessitano di un altro grado di pulizia
RU2749343C1 (ru) * 2020-10-22 2021-06-08 Акционерное общество «Обнинское научно-производственное предприятие «Технология» им. А.Г.Ромашина» Способ удаления индикаторной проникающей жидкости с поверхности стеклокерамических изделий с использованием ультразвуковых волн

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US6511546B1 (en) 1998-11-25 2003-01-28 Petroferm Inc. Aqueous cleaning
WO2000050555A1 (fr) * 1999-02-26 2000-08-31 Dr. O.K. Wack Chemie Gmbh Procede et nettoyant liquide pour nettoyer des objets par voie humide
EP1213345A1 (fr) * 2000-12-07 2002-06-12 DR.O.K. WACK CHEMIE GmbH Procédé de nettoyage humide pour articles
US6811616B2 (en) 2000-12-07 2004-11-02 O. K. Wack Method for the liquid cleaning of objects
EP1700642A3 (fr) * 2005-03-11 2009-04-01 Pero Aktiengesellschaft P. Erbel Maschinen- und Apparatebau Procédé et dispositif pour le nettoyage d'objets avec l'aide d'un mélange azéotrope
US10899999B2 (en) 2016-02-18 2021-01-26 Ecolab Usa Inc. Solvent application in bottle wash using amidine based formulas
US11629312B2 (en) 2016-02-18 2023-04-18 Ecolab Usa Inc. Solvent application in bottle wash using amidine based formulas

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EP1191095A2 (fr) 2002-03-27
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DE59710188D1 (de) 2003-07-03
EP1191095A3 (fr) 2002-08-07

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