EP4279650A1 - Method for dry cleaning composite textile articles - Google Patents

Method for dry cleaning composite textile articles Download PDF

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Publication number
EP4279650A1
EP4279650A1 EP23171428.8A EP23171428A EP4279650A1 EP 4279650 A1 EP4279650 A1 EP 4279650A1 EP 23171428 A EP23171428 A EP 23171428A EP 4279650 A1 EP4279650 A1 EP 4279650A1
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EP
European Patent Office
Prior art keywords
articles
mixture
mass
less
solvent
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.)
Pending
Application number
EP23171428.8A
Other languages
German (de)
French (fr)
Inventor
Michel Richard
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.)
Alysee Services
Original Assignee
Alysee Services
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Filing date
Publication date
Application filed by Alysee Services filed Critical Alysee Services
Publication of EP4279650A1 publication Critical patent/EP4279650A1/en
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/08—Associated apparatus for handling and recovering the solvents
    • D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
    • D06F43/083—Condensing arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/02—Dry-cleaning apparatus or methods using volatile solvents having one rotary cleaning receptacle only
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/08—Associated apparatus for handling and recovering the solvents
    • D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
    • D06F43/085—Filtering arrangements; Filter cleaning; Filter-aid powder dispensers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
    • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
    • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
    • D06L1/06—De-sizing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
    • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
    • D06L1/08—Multi-step processes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
    • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
    • D06L1/10—Regeneration of used chemical baths
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B9/00—Solvent-treatment of textile materials
    • D06B9/06—Solvent-treatment of textile materials with recovery of the solvent
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F31/00—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies
    • D06F39/20—

Definitions

  • the present invention relates to a process for dry cleaning composite textile articles and an installation allowing the implementation of the process.
  • Cut resistant work gloves are made from knitted synthetic yarns (hydrophobic) reinforced with metal threads to achieve cut protection. Certain parts of the gloves may also be coated with a polymer, in particular polyurethane, and/or covered or made of leather or suede. Some cutting aprons are mainly made of bovine leather.
  • dry cleaning (without the use of water as a solvent or vehicle for cleaning active ingredients) is carried out in special, completely waterproof machines, which allow the recycling of the solvent. These machines are programmable but often suitable for a limited range of cleaners/solvents.
  • An aim of the present invention is to propose a process for dry degreasing of composite textile articles, in particular work gloves, partially covered with mineral grease which does not use perchloroethylene.
  • Another aim of the present invention is to propose a method such as the aforementioned which can be applied to composite articles comprising leather or suede parts.
  • Another aim of the present invention is to propose a method such as the aforementioned which can be implemented in a pre-existing installation or using standard cleaning devices.
  • Another aim of the present invention is to provide a dry degreasing installation, in particular for composite textile articles, in particular work gloves, partially covered with mineral grease which can easily be manufactured and at lower cost.
  • Another aim of the present invention is to provide an installation which is energy efficient.
  • the present invention relates to a dry degreasing process, in particular for composite textile articles, in particular work gloves, partially covered with mineral grease.
  • said articles are soaked with a first solvent comprising/consisting of a mixture of halogen-free alkanes and then said soaked articles are optionally sprayed with an additive comprising or consisting of a mixture of aliphatic hydrocarbons free of halogen and/or at least one non-ionic and/or cationic surfactant and having a boiling temperature higher than that of said solvent, a mechanical action is exerted on said articles, in particular said articles are stirred articles, said articles are then drained, the liquid mixture resulting from the spinning is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and optionally the distillate is reused to degrease textile items.
  • the distillate is condensed with water at a temperature lower than the temperature of the distillate leaving the distillation and the water used for the condensation is used to heat a room and/or to wash other articles. textiles with detergent.
  • Said articles to be treated may comprise leather and/or suede parts at least partially covered with a mineral oil.
  • said liquid mixture resulting from the spinning is filtered before distilling it.
  • said articles contain metal particles, said metal particles contained in said liquid mixture resulting from the spinning are extracted before distilling it.
  • said metal particles can be extracted by means of at least one magnet and preferably, said metal particles are extracted during filtration, if said liquid mixture is filtered.
  • said liquid mixture is filtered and during filtration, said magnet(s) is immersed in said liquid mixture resulting from the spinning so as to fix said metal particles on said magnet(s).
  • the solid particles contained in said liquid mixture resulting from the spinning are separated by gravimetry before distilling it.
  • the aqueous phase and the organic phase contained in said liquid mixture resulting from the spinning are separated by gravity before distilling it.
  • Such a mixture is obtained in particular when the articles to be degreased contain water, even in tiny quantities. This water is extracted from the articles in particular by the surfactant of the additive. This is the case when the items contain leather and/or suede or are made of leather and/or suede.
  • said aqueous phase is separated from said organic phase after having separated said liquid mixture resulting from the spinning of said solid particles.
  • said organic phase is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and the condensed distillate is reused to degrease articles again.
  • the aqueous phase and the organic phase contained in the liquid mixture remaining after distillation are separated by gravity, optionally with stirring and/or with an addition of sodium chloride and optionally said organic phase is used for cleaning other articles. without prior distillation or after distillation, the distillate thus being reused for degreasing. This step makes it possible to still recover solvent when degreasing articles containing water (leather and/or suede in particular).
  • the hot water leaving the condenser cooling circuit is used in the washing machine and possibly stored in the tank when this tank is present.
  • the tank is then preferably insulated.
  • the tank serves as a buffer and regulates the flow of water entering the washing machine.
  • the hot water leaving the condenser cooling circuit is cooled in the heat exchanger then reinjected into the condenser cooling circuit to be used again for the condensation of the solvent during of the same distillation or during a subsequent distillation.
  • the heat released by the water is used at the heat exchanger to heat the building, for example.
  • the water in the cooling circuit may contain glycol or be replaced by glycol or any other heat transfer fluid.
  • the hot water can also be used to supply the washing machine.
  • the tank is preferably insulated so as to keep the water or other liquid leaving the condenser cooling circuit at a constant temperature.
  • the water used to condense the distilled solvent is hot.
  • the solvent washing device advantageously comprises means for vaporizing the additive in the drum, which are connected to the additive reserve.
  • the installation comprises two independent solvent washing devices and two independent washing machines, the cooling circuit of each of the devices opens into a heat-insulated storage tank, which is connected to each of said washing machines. wash and part of the water contained in the storage tank is cooled in a heat exchanger to be reinjected into the cooling circuit of the condenser of each of the two solvent washing devices.
  • the cooling water circuit(s) may be supplied by the city water circuit or contain glycol or any other heat transfer fluid.
  • the heat transfer fluid circulating in the cooling circuit of the condenser(s) is water, the installation advantageously includes at least one washing machine.
  • the solvent is not limited according to the invention. It is always different from perchlorethylene and mixtures containing perchlorethylene or any other halogenated hydrocarbon.
  • the solvent reserve contains a solvent as defined with reference to the process of the invention.
  • the solvent can therefore contain a surfactant which, due to its amphiphilic nature, makes it possible to clean several types of dirt.
  • said additive reserve contains an additive as defined with reference to the process of the invention.
  • the additive may have a boiling temperature higher than that of the solvent and in particular the mixture of non-halogenated hydrocarbons constituting or included in the solvent.
  • said surfactant has a boiling point higher than that of the solvent.
  • the installation comprises, upstream of the boiler of said distillation column, a filter provided with at least one magnet.
  • a filter provided with at least one magnet.
  • the Applicant has in fact noted that work textiles, in particular cutting gloves, are often contaminated by metal particles which have become embedded in their thickness during use of the glove. These metal particles are likely to clog the solvent circulation circuit and damage the various elements of the dry cleaning device. The particles can also be fragments of the metal wires contained in the gloves.
  • the magnet(s) make it possible to stop the ferrous particles upstream of the distillation column, at the outlet of the drum.
  • said filter is dimensioned so as to be at least partially filled with said solvent leaving said drum for the majority of the duration of flow of said solvent towards said column to be distilled and said magnet(s) are arranged so as to be immersed in the volume of solvent contained in said filter. Since the particles float in the solvent contained in the filter, they are easily attracted to the magnet(s). The magnet(s) are preferably removable in order to easily remove the particles covering them before their reuse.
  • the filter is not limited according to the invention. Its openings and their number are selected according to the flow of solvent leaving the drum.
  • the filter is advantageously concave, which allows the immersion of the magnet(s) when the latter, for example, are simply placed on the bottom of the filter.
  • Majority of flow time means that for at least half of the flow time, the liquid immerses the magnet(s).
  • the filter fills so as to immerse the magnet(s) and the outgoing flow/incoming flow ratio is such that the magnet(s) remain immersed until the filter empties when the incoming flow is zero.
  • said circulation circuit comprises a gravimetric solid/liquid separator which is connected at the outlet to the boiler of the distillation column and at the inlet to the outlet of the drum.
  • This separator makes it possible to separate the liquid from the solid particles it contains.
  • Solid particles come, for example, from textile attrition; These are pieces of textile or leather.
  • said circulation circuit comprises a gravimetric liquid/liquid separator connected to the solid/liquid separator and which allows the separation between an aqueous phase and an organic phase.
  • This separator makes it possible to treat the aqueous phase which forms when the treated composite textiles contain hydrophilic portions, such as leather or suede for example.
  • said liquid/liquid separator comprises mixing means and is connected to a reserve of mineral salt, in particular NaCl. Adding salt helps break the emulsion and accelerate phase separation.
  • the solvent is not limited according to the invention. It is in all cases free of halogenated hydrocarbons and any halogen.
  • the additive is preferably used when the solvent does not contain alkoxylated propanols.
  • the solvent may advantageously have a boiling point equal to or greater than 170°C, in particular equal to 180°C and less than or equal to 190°C, a flash point greater than or equal to 61°C, in particular equal to 65°C. C, and less than or equal to 72°C, a saturated vapor pressure at 20°C greater than or equal to 45 Pa and in particular equal to 54 Pascal and less than or equal to 65 Pa, a density less than that of water and notably equal to 0.84 g/cm 3 and a KB value measured according to the ASTM standard (Method D-1133) of 161.
  • the additive preferably has a flash point above 61°C.
  • a machining oil comprises or consists of a mixture of saturated or aromatic hydrocarbons comprising from 15 to 40 carbon atoms and not comprising a halogen atom.
  • a mineral oil can also be an aqueous emulsion (oil in water or water in oil) and contain various active agents including bactericides and antifoaming agents, for example.
  • isotridecanol refers to 11-methyl dodecan-1-ol.
  • ethoxylated isotridecanol designate the reaction product between 11-methyl dodecan-1-ol and ethylene oxide.
  • dry cleaning designates cleaning using a solvent or vehicle other than water.
  • the installation comprises a sealed dry cleaning device containing a rotating drum 1, a solvent tank 12 and an additive reserve 14.
  • the additive reserve 14 and the solvent reserve 12 are connected to the drum 1 by pipes equipped with controllable solenoid valves.
  • the cleaning device is equipped with a nozzle of spraying (not shown) which makes it possible to spray the additive contained in the reserve 12 in the drum 1, in particular when the latter rotates.
  • the drum 1 also allows the articles to be drained once they have been soaked with the solvent and the additive and have been sufficiently mixed in the drum 1.
  • the liquid extracted by centrifugation from the drum 1 passes through the pipe 3 and falls into a filter 5 which contains a magnet 7. This magnet 7 makes it possible to retain all the particles of ferrous material which have been extracted from the articles. This avoids blocking the pipes of the device.
  • the liquid leaving the filter 5 is sent to a gravimetric solid/liquid separator 8.
  • the separator 8 is connected to the boiler 95 of the distillation column 9.
  • the cooling circuit of the condenser 93 of the distillation column 9 is supplied with water coming from the city network. This water therefore circulates in a circuit separate from the hermetic circulation circuit which connects the drum 1, the reserves 12 and 14, the boiler 95, the distillation column 9, the condenser 93 and the two separators 8 and 81. It is not therefore never in contact with the solvent but heats up on contact in the condenser 93, then causing condensation of the solvent.
  • the outlet of the condenser 93 is connected to the tank 12 and/or to the inlet of the boiler 95 of the distillation column 9.
  • the solid/liquid separator 8 is connected to a liquid/liquid separator 81.
  • the upper part of the liquid/liquid separator liquid 81 is connected to the solvent reserve 12 and/or to the boiler 95 of the distillation column 9. (these connections via pipes not shown, for the sake of clarity, are indicated by stars on the Fig. 1 ).
  • the cooling water circuit of condenser 93 is indicated in dotted lines on the Fig. 1 .
  • the outlet of the cooling circuit of the condenser 93 is connected to a heat-insulated tank 55, which is connected to a washing machine 56.
  • the heat-insulated tank 55 is connected to a heat exchanger 67 which makes it possible to cool the water contained in the tank 55
  • the outlet of the heat exchanger 67 is connected to the inlet of the cooling circuit of the condenser 93.
  • the connection is symbolized by two stars.
  • the filter 5 has a concave shape and the magnet 7 is arranged so as to be at least partially immersed by the liquid leaving the drum 1, this in order to facilitate the capture of ferrous particles by the magnet 7.
  • the process of the invention will now be described with reference to the Fig. 1 .
  • the method of the invention and the installation of the invention are particularly suitable for cleaning work gloves, in particular anti-cut cutting gloves which have leather parts.
  • Leather is a hydrophilic material that retains water to a certain extent.
  • the gloves are introduced into the drum 1.
  • the solvent coming from the reserve 12 is introduced into the drum 1.
  • the drum is rotated so as to soak the gloves.
  • the additive is then sprayed onto the soaked gloves.
  • the mixing limits the wear of the textiles and allows the gloves to be reused and cleaned several times.
  • the gloves are wrung out and then removed from the drum and possibly dried if necessary.
  • the liquid leaving the drum is therefore a mixture of the solvent, the additive, water entrained in particular by the surfactant of the additive, metal, textile and/or leather particles.
  • the outgoing liquid is poured onto the filter 5.
  • the liquid surrounding the magnet 7, the ferrous particles in suspension easily stick to the magnet 7.
  • the filtered liquid is introduced into the solid/liquid separator 8 which allows it to be removed sludge formed by solid particles and pieces of textiles.
  • the liquid phase is sent to the boiler 95 of the distillation column 9.
  • the temperature in the distillation column 9 is such that it allows the evaporation of the solvent or at least of the hydrocarbon mixture which it contains.
  • the solvent is then condensed in the condenser 93 and returned to the solvent reserve 12 or to the boiler 95 of the distillation column 9 for a second distillation.
  • the cooling water leaving the condenser 93 is sent to the heat-insulated tank 55 or passes through the latter to reach the washing machine 56.
  • the water not used for the washing machine 56 passes through the heat exchanger 67 , cools there and is sent to the inlet of the cooling circuit of the condenser 93.
  • the heat exchanger 67 makes it possible to heat the room where the installation is located.
  • the mixture remaining at the bottom of the column after distillation of the solvent is introduced into a gravimetric liquid/liquid separator 81.
  • a phase separation then appears.
  • the upper phase is sent to the boiler 95 or to the solvent reserve 12.
  • It is also possible to connect the liquid/liquid separator 81 to a solvent reserve. salt(s) (not shown).
  • the addition of salt makes it possible to promote and accelerate the phase separation in the liquid/liquid separator 81.
  • the separator 81 also includes mixing means and becomes a mixer/decanter.
  • the durations of the treatments, the flow rates of the solvent and the additive, the quantity of textiles treated, the temperatures and pressure are adjustable experimentally by those skilled in the art.

Abstract

La présente invention concerne un procédé de dégraissage à sec, notamment pour des articles textiles composites, en particulier des gants de travail, partiellement recouverts de graisse minérale. Selon ce procédé, on imbibe lesdits articles avec un premier solvant comprenant/constitué d'un mélange d'alcanes exempts d'halogène puis en ce que l'on vaporise éventuellement sur lesdits articles imbibés un additif comprenant ou constitué d'un mélange d'hydrocarbures aliphatiques exempts d'halogène et/ou d'au moins un tensio-actif non ionique et/ou cationique et ayant une température d'ébullition supérieure à celle dudit solvant, on exerce une action mécanique sur lesdits articles, notamment on brasse lesdits articles, on essore ensuite lesdits articles, on distille le mélange liquide issu de l'essorage de manière à séparer ledit premier solvant ou au moins ledit mélange d'alcanes exempts d'halogènes qu'il contient et éventuellement on réutilise le distillat pour dégraisser des articles textiles.The present invention relates to a dry degreasing process, in particular for composite textile articles, in particular work gloves, partially covered with mineral grease. According to this process, said articles are impregnated with a first solvent comprising/consisting of a mixture of halogen-free alkanes then in that said soaked articles are optionally sprayed with an additive comprising or consisting of a mixture of aliphatic hydrocarbons free of halogen and/or at least one nonionic and/or cationic surfactant and having a boiling temperature higher than that of said solvent, a mechanical action is exerted on said articles, in particular said articles are stirred , said articles are then drained, the liquid mixture resulting from the spinning is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and optionally the distillate is reused to degrease articles textiles.

Description

[Domaine technique][Technical area]

La présente invention concerne un procédé de nettoyage à sec d'articles textiles composites et une installation permettant la mise en oeuvre du procédé.The present invention relates to a process for dry cleaning composite textile articles and an installation allowing the implementation of the process.

[Etat de la technique][State of the art]

Les gants de travail anti-coupure sont fabriqués à partir de fils synthétiques tricotés (hydrophobes) renforcés par des fils métalliques pour obtenir la protection contre la coupure. Certaines parties des gants peuvent de plus être enduites d'un polymère, notamment le polyuréthane, et/ou recouvertes ou constituées de cuir ou de daim. Certains tabliers de découpe sont eux majoritairement en cuir de bovin.Cut resistant work gloves are made from knitted synthetic yarns (hydrophobic) reinforced with metal threads to achieve cut protection. Certain parts of the gloves may also be coated with a polymer, in particular polyurethane, and/or covered or made of leather or suede. Some cutting aprons are mainly made of bovine leather.

Ces gants de découpes et autres textiles de protections sont souvent tachés d'huile d'usinage.These cutting gloves and other protective textiles are often stained with machining oil.

Le nettoyage de tels textiles est donc difficile d'une part du fait de leur structure composite qui peut mêler matériau hydrophobe et matériau hydrophile et de la présence de l'huile d'usinage dont la formulation est elle-même complexe.Cleaning such textiles is therefore difficult on the one hand due to their composite structure which can mix hydrophobic material and hydrophilic material and the presence of machining oil whose formulation is itself complex.

Ces textiles étaient classiquement nettoyés avec du perchloréthylène dont l'utilisation est maintenant strictement réglementée et parfois interdite dans certains pays.These textiles were classically cleaned with perchlorethylene, the use of which is now strictly regulated and sometimes prohibited in certain countries.

Par ailleurs, le nettoyage à sec (sans utilisation d'eau en tant que solvant ou véhicule des actifs nettoyants) se fait dans des machines spéciales, totalement étanches, qui permettent le recyclage du solvant. Ces machines sont programmables mais souvent adaptées à une gamme de produits nettoyants/solvants limitée.Furthermore, dry cleaning (without the use of water as a solvent or vehicle for cleaning active ingredients) is carried out in special, completely waterproof machines, which allow the recycling of the solvent. These machines are programmable but often suitable for a limited range of cleaners/solvents.

Divers documents indiquent qu'il est possible de nettoyer des articles textiles de travail sans utilisation de perchloréthylène en améliorant l'action mécanique du traitement. La graisse est retirée mécaniquement plutôt que par dissolution dans un solvant. C'est le cas par exemple, du document CN 208863628 .Various documents indicate that it is possible to clean textile work articles without the use of perchlorethylene by improving the mechanical action of the treatment. The grease is removed mechanically rather than by dissolving in a solvent. This is the case, for example, of the document CN 208863628 .

[Problème technique à résoudre][Technical issue to resolve]

Un but de la présente invention est de proposer un procédé de dégraissage à sec d'articles textiles composites, en particulier des gants de travail, partiellement recouverts de graisse minérale qui n'utilise pas de perchloroéthylène.An aim of the present invention is to propose a process for dry degreasing of composite textile articles, in particular work gloves, partially covered with mineral grease which does not use perchloroethylene.

Un autre but de la présente invention est de proposer un procédé tel que précité qui puisse être appliqué à des articles composites comprenant des parties en cuir ou en daim.Another aim of the present invention is to propose a method such as the aforementioned which can be applied to composite articles comprising leather or suede parts.

Un autre but de la présente invention est de proposer un procédé tel que précité qui puisse être mis en oeuvre dans une installation préexistante ou utilisant des dispositifs de nettoyage standard.Another aim of the present invention is to propose a method such as the aforementioned which can be implemented in a pre-existing installation or using standard cleaning devices.

Un autre but de la présente invention est de fournir une installation de dégraissage à sec, notamment pour des articles textiles composites, en particulier des gants de travail, partiellement recouverts de graisse minérale qui puisse facilement être fabriquée et à moindre coût.Another aim of the present invention is to provide a dry degreasing installation, in particular for composite textile articles, in particular work gloves, partially covered with mineral grease which can easily be manufactured and at lower cost.

Un autre but de la présente invention est de proposer une installation qui est économe en énergie.Another aim of the present invention is to provide an installation which is energy efficient.

[Résumé de l'invention][Summary of the invention]

Selon un premier aspect, la présente invention concerne un procédé de dégraissage à sec, notamment pour des articles textiles composites, en particulier des gants de travail, partiellement recouverts de graisse minérale. De manière caractéristique, selon ce procédé, on imbibe lesdits articles avec un premier solvant comprenant/constitué d'un mélange d'alcanes exempts d'halogène puis l'on vaporise éventuellement sur lesdits articles imbibés un additif comprenant ou constitué d'un mélange d'hydrocarbures aliphatiques exempts d'halogène et/ou d'au moins un tensio-actif non ionique et/ou cationique et ayant une température d'ébullition supérieure à celle dudit solvant, on exerce une action mécanique sur lesdits articles, notamment on brasse lesdits articles, on essore ensuite lesdits articles, on distille le mélange liquide issu de l'essorage de manière à séparer ledit premier solvant ou au moins ledit mélange d'alcanes exempts d'halogènes qu'il contient et éventuellement on réutilise le distillat pour dégraisser des articles textiles.According to a first aspect, the present invention relates to a dry degreasing process, in particular for composite textile articles, in particular work gloves, partially covered with mineral grease. Characteristically, according to this process, said articles are soaked with a first solvent comprising/consisting of a mixture of halogen-free alkanes and then said soaked articles are optionally sprayed with an additive comprising or consisting of a mixture of aliphatic hydrocarbons free of halogen and/or at least one non-ionic and/or cationic surfactant and having a boiling temperature higher than that of said solvent, a mechanical action is exerted on said articles, in particular said articles are stirred articles, said articles are then drained, the liquid mixture resulting from the spinning is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and optionally the distillate is reused to degrease textile items.

La Demanderesse a en effet constaté qu'un tel solvant éventuellement combiné avec un additif tel que précité permet de nettoyer les gants de travail, lesquels sont jetés après usage ou dégraisser avec des solvant halogénés non respectueux de l'environnement et des travailleurs.The Applicant has in fact noted that such a solvent possibly combined with an additive as mentioned above makes it possible to clean work gloves, which are thrown away after use or to degrease with halogenated solvents which are not respectful of the environment and workers.

[Description détaillée][Detailed description]

Avantageusement, on condense le distillat avec de l'eau à une température inférieure à la température du distillat en sortie de distillation et l'on utilise l'eau ayant servi à la condensation pour chauffer un local et/ou pour laver d'autres articles textiles avec un détergent.Advantageously, the distillate is condensed with water at a temperature lower than the temperature of the distillate leaving the distillation and the water used for the condensation is used to heat a room and/or to wash other articles. textiles with detergent.

Lesdits articles à traiter peuvent comprendre des parties en cuir et/ou en daim au moins partiellement recouvertes d'une huile minérale.Said articles to be treated may comprise leather and/or suede parts at least partially covered with a mineral oil.

Selon un mode de mise en oeuvre, ledit premier solvant peut être choisi parmi :

  • les solvants comprenant/constitués d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 13 atomes de carbone, dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques et d'un mélange de propanols alcoxylés, ledit mélange de propanols alcoxylés représentant de 50% à 70 % en masse dudit solvant ; - les solvants comprenant/constitués de 50% à 100% en masse d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 14 atomes de carbone dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques, les hydrocarbures aliphatiques représentant au moins 30% du mélange ;
et leurs mélanges.According to one mode of implementation, said first solvent can be chosen from:
  • solvents comprising/consisting of a mixture of hydrocarbons free of halogens and containing 11 to 13 carbon atoms, including iso alkanes and less 2% by mass of aromatic hydrocarbons and a mixture of alkoxylated propanols, said mixture of alkoxylated propanols representing 50% to 70% by mass of said solvent; - solvents comprising/consisting of 50% to 100% by mass of a mixture of hydrocarbons free of halogens and containing 11 to 14 carbon atoms including iso alkanes and less than 2% by mass of aromatic hydrocarbons, aliphatic hydrocarbons representing at least 30% of the mixture;
and their mixtures.

Selon un mode de mise en oeuvre combinable avec chacun des modes de mise en oeuvre précités, ledit additif est choisi parmi :

  • les additifs comprenant/constitués de 25% à 50% en masse d'un mélange d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 14 atomes de carbone dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques, moins de 15% en masse de docusate de sodium, moins de 10% en masse de phosphates d'alpha hydro oméga hydroxy mono alkyl éthers en C12-C14, moins de 5% ou 2,5 %en masse d'isotridécanol éthoxylé, moins de 2,5% en masse de 1-amino-propane-2-ol et moins de 0,1% d'alpha hexylcinnamaldéhyde ; et
  • les additifs comprenant/constitués de moins de 25% en masse d'un mélange d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 14 atomes de carbone dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques, moins de 15% en masse de docusate de sodium, moins de 5% en masse de phosphate d'alcools éthoxylés en C12-C14, moins de 5% ou moins de 2% en masse d'isotridécanol éthoxylé et moins de 2% en masse de 1-amino-propane-2-ol ; et leurs mélanges.
According to an implementation mode that can be combined with each of the aforementioned implementation modes, said additive is chosen from:
  • additives comprising/consisting of 25% to 50% by mass of a mixture of a mixture of hydrocarbons free of halogens and containing 11 to 14 carbon atoms including iso alkanes and less than 2% by mass of aromatic hydrocarbons, less than 15% by mass of sodium docusate, less than 10% by mass of alpha hydro omega hydroxy mono alkyl ethers C 12 -C 14 phosphates, less than 5% or 2.5% by mass of ethoxylated isotridecanol, less than 2.5% by mass of 1-amino-propan-2-ol and less than 0.1% alpha hexylcinnamaldehyde; And
  • additives comprising/consisting of less than 25% by mass of a mixture of a mixture of hydrocarbons free of halogens and containing 11 to 14 carbon atoms including iso alkanes and less than 2% by mass of hydrocarbons aromatics, less than 15% by mass of sodium docusate, less than 5% by mass of C 12 -C 14 ethoxylated alcohol phosphate, less than 5% or less than 2% by mass of ethoxylated isotridecanol and less than 2% by weight of 1-amino-propan-2-ol; and their mixtures.

Avantageusement, on filtre ledit mélange liquide issu de l'essorage avant de le distiller. Lorsque lesdits articles comportent des particules métalliques, on extrait lesdites particules métalliques contenues dans ledit mélange liquide issu de l'essorage avant de le distiller.Advantageously, said liquid mixture resulting from the spinning is filtered before distilling it. When said articles contain metal particles, said metal particles contained in said liquid mixture resulting from the spinning are extracted before distilling it.

Avantageusement, on peut extraire lesdites particules métalliques au moyen d'au moins un aimant et de préférence, on extrait lesdites particules métalliques pendant la filtration, si l'on filtre ledit mélange liquide.Advantageously, said metal particles can be extracted by means of at least one magnet and preferably, said metal particles are extracted during filtration, if said liquid mixture is filtered.

Avantageusement, on filtre ledit mélange liquide et pendant la filtration on immerge ledit ou lesdits aimants dans ledit mélange liquide issu de l'essorage de manière à fixer lesdites particules métalliques sur ledit ou lesdits aimants.Advantageously, said liquid mixture is filtered and during filtration, said magnet(s) is immersed in said liquid mixture resulting from the spinning so as to fix said metal particles on said magnet(s).

Avantageusement, on sépare par gravimétrie les particules solides contenues dans ledit mélange liquide issu de l'essorage avant de le distiller.Advantageously, the solid particles contained in said liquid mixture resulting from the spinning are separated by gravimetry before distilling it.

Avantageusement, on sépare par gravité la phase aqueuse et la phase organique contenues dans ledit mélange liquide issu de l'essorage avant de le distiller. Un tel mélange est obtenu en particulier lorsque les articles à dégraisser contiennent de l'eau même en infime quantité. Cette eau est extraite des articles notamment par le tensio-actif de l'additif. C'est le cas lorsque les articles contiennent du cuir et/ou du daim ou sont en cuir et/ou daim.Advantageously, the aqueous phase and the organic phase contained in said liquid mixture resulting from the spinning are separated by gravity before distilling it. Such a mixture is obtained in particular when the articles to be degreased contain water, even in tiny quantities. This water is extracted from the articles in particular by the surfactant of the additive. This is the case when the items contain leather and/or suede or are made of leather and/or suede.

Avantageusement, on sépare ladite phase aqueuse de ladite phase organique après avoir séparé ledit mélange liquide issu de l'essorage desdites particules solides. Avantageusement, on distille ladite phase organique de manière à séparer ledit premier solvant ou au moins ledit mélange d'alcanes exempts d'halogènes qu'il contient et on réutilise le distillat condensé pour dégraisser à nouveau des articles. Avantageusement, on sépare par gravité la phase aqueuse et la phase organique contenues dans le mélange liquide restant après la distillation, éventuellement sous agitation et/ou avec un ajout de chlorure de sodium et éventuellement on utilise ladite phase organique pour le nettoyage d'autres articles sans distillation préalable ou après distillation, le distillat étant ainsi réutilisé pour le dégraissage. Cette étape permet de récupérer encore du solvant lors du dégraissage d'articles contenant de l'eau (cuir et/ou daim notamment).Advantageously, said aqueous phase is separated from said organic phase after having separated said liquid mixture resulting from the spinning of said solid particles. Advantageously, said organic phase is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and the condensed distillate is reused to degrease articles again. Advantageously, the aqueous phase and the organic phase contained in the liquid mixture remaining after distillation are separated by gravity, optionally with stirring and/or with an addition of sodium chloride and optionally said organic phase is used for cleaning other articles. without prior distillation or after distillation, the distillate thus being reused for degreasing. This step makes it possible to still recover solvent when degreasing articles containing water (leather and/or suede in particular).

Les assertions relatives au solvant ou à l'additif sont valables pour le procédé de l'invention et pour le dispositif de l'invention.The assertions relating to the solvent or the additive are valid for the process of the invention and for the device of the invention.

Selon un second aspect, la présente invention concerne une installation de nettoyage comprenant : au moins un dispositif de lavage à solvant qui comprend : un circuit hermétique de circulation, un tambour rotatif de nettoyage/essorage monté sur ledit circuit et qui est relié par ledit circuit en entrée dudit tambour à un réservoir de solvant, la sortie dudit tambour étant reliée par ledit circuit au bouilleur d'une colonne à distiller, un condenseur monté sur ledit circuit, en sortie de la ladite colonne à distiller et dont la sortie est reliée par ledit circuit hermétique à ladite réserve de solvant, éventuellement au moins une réserve d'additif reliée audit tambour et un circuit de refroidissement dudit condenseur ; et

  • au moins une machine à laver qui comprend une entrée d'eau raccordée à la sortie dudit circuit de refroidissement dudit condenseur et éventuellement une cuve connectée entre la sortie du circuit de refroidissement dudit condenseur et ladite machine à laver ;ou
  • au moins une cuve raccordée à la sortie du circuit de refroidissement du condenseur, ladite cuve étant raccordée à un échangeur thermique dont la sortie est raccordée à l'entrée du circuit de refroidissement du condenseur et éventuellement au moins une machine à laver qui comprend une entrée d'eau raccordée à ladite cuve en amont dudit échangeur thermique.
According to a second aspect, the present invention relates to a cleaning installation comprising: at least one solvent washing device which comprises: a hermetic circulation circuit, a rotating cleaning/drying drum mounted on said circuit and which is connected by said circuit at the inlet of said drum to a solvent reservoir, the outlet of said drum being connected by said circuit to the boiler of a distillation column, a condenser mounted on said circuit, at the outlet of said distillation column and whose outlet is connected by said hermetic circuit to said solvent reserve, possibly at least one additive reserve connected to said drum and a cooling circuit of said condenser; And
  • at least one washing machine which comprises a water inlet connected to the outlet of said cooling circuit of said condenser and possibly a tank connected between the output of the cooling circuit of said condenser and said washing machine; or
  • at least one tank connected to the outlet of the cooling circuit of the condenser, said tank being connected to a heat exchanger whose outlet is connected to the inlet of the cooling circuit of the condenser and possibly at least one washing machine which comprises an inlet of water connected to said tank upstream of said heat exchanger.

L'eau chaude sortant du circuit de refroidissement du condenseur est utilisée dans la machine à laver et éventuellement stockée dans la cuve quand cette cuve est présente. La cuve est alors de préférence calorifugée. La cuve permet de faire tampon et de régler le débit d'eau entrant dans la machine à laver.The hot water leaving the condenser cooling circuit is used in the washing machine and possibly stored in the tank when this tank is present. The tank is then preferably insulated. The tank serves as a buffer and regulates the flow of water entering the washing machine.

Quand l'installation comprend une cuve et un échangeur thermique, l'eau chaude sortant du circuit de refroidissement du condenseur est refroidie dans l'échangeur thermique puis réinjectée en entrée du circuit de refroidissement du condenseur pour servir à nouveau à la condensation du solvant lors de la même distillation ou lors d'une distillation ultérieure. La chaleur dégagée par l'eau sert au niveau de l'échangeur thermique à chauffer le bâtiment, par exemple. Lorsque l'installation ne comporte pas de machine à laver, l'eau du circuit de refroidissement peut contenir du glycol ou être remplacée par du glycol ou par tout autre fluide caloporteur.When the installation includes a tank and a heat exchanger, the hot water leaving the condenser cooling circuit is cooled in the heat exchanger then reinjected into the condenser cooling circuit to be used again for the condensation of the solvent during of the same distillation or during a subsequent distillation. The heat released by the water is used at the heat exchanger to heat the building, for example. When the installation does not include a washing machine, the water in the cooling circuit may contain glycol or be replaced by glycol or any other heat transfer fluid.

Si l'installation comporte une machine à laver et un échangeur thermique, l'eau chaude peut également servir à l'alimentation de la machine à laver.If the installation includes a washing machine and a heat exchanger, the hot water can also be used to supply the washing machine.

Quel que soit le mode de réalisation, le cuve est de préférence calorifugée de manière à conserver l'eau ou autre liquide sortant du circuit de refroidissement du condenseur à température constante.Whatever the embodiment, the tank is preferably insulated so as to keep the water or other liquid leaving the condenser cooling circuit at a constant temperature.

L'eau ayant servi à la condensation du solvant distillé est chaude. En utilisant cette eau chaude dans une machine à laver, on réalise des économies d'énergie et d'eau. Le dispositif de lavage à solvant comprend avantageusement des moyens de vaporisation de l'additif dans le tambour, lesquels sont connectés à la réserve d'additif. Selon un mode de réalisation préféré, l'installation comporte deux dispositifs de lavage à solvant, indépendants et deux machines à laver indépendantes, le circuit de refroidissement de chacun des dispositifs débouche dans un réservoir de stockage calorifugé, lequel est relié à chacune desdites machines à laver et une partie de l'eau contenue dans le réservoir de stockage est refroidie dans un échangeur thermique pour être réinjectée dans le circuit de refroidissement du condenseur de chacun des deux dispositifs de lavage à solvant.The water used to condense the distilled solvent is hot. By using this hot water in a washing machine, we save energy and water. The solvent washing device advantageously comprises means for vaporizing the additive in the drum, which are connected to the additive reserve. According to a preferred embodiment, the installation comprises two independent solvent washing devices and two independent washing machines, the cooling circuit of each of the devices opens into a heat-insulated storage tank, which is connected to each of said washing machines. wash and part of the water contained in the storage tank is cooled in a heat exchanger to be reinjected into the cooling circuit of the condenser of each of the two solvent washing devices.

Dans tous les cas, le(s) circuit(s) d'eau de refroidissement peut/peuvent être alimenté(s) par le circuit d'eau de ville ou contenir du glycol ou tout autre fluide caloporteur. Quand le fluide caloporteur circulant dans le circuit de refroidissement du ou des condenseurs est de l'eau, l'installation comprend avantageusement au moins une machine à laver.In all cases, the cooling water circuit(s) may be supplied by the city water circuit or contain glycol or any other heat transfer fluid. When the heat transfer fluid circulating in the cooling circuit of the condenser(s) is water, the installation advantageously includes at least one washing machine.

Le solvant n'est pas limité selon l'invention. Il est toujours différent du perchloréthylène et des mélanges contenant du perchloréthylène ou tout autre hydrocarbure halogéné. Ainsi, selon un mode de réalisation particulier, combinable avec chacun des modes de réalisation de l'invention, la réserve de solvant contient un solvant tel que défini en référence au procédé de l'invention.The solvent is not limited according to the invention. It is always different from perchlorethylene and mixtures containing perchlorethylene or any other halogenated hydrocarbon. Thus, according to a particular embodiment, combinable with each of the embodiments of the invention, the solvent reserve contains a solvent as defined with reference to the process of the invention.

Ces deux solvants donnent de bons résultats dans le cas de la graisse minérale sur des articles composites comprenant notamment du cuir.These two solvents give good results in the case of mineral grease on composite articles including leather.

Le solvant peut donc contenir un tensio-actif qui permet du fait de son caractère amphiphile de nettoyer plusieurs types de salissures.The solvent can therefore contain a surfactant which, due to its amphiphilic nature, makes it possible to clean several types of dirt.

Selon un mode de réalisation préféré, combinable avec chacun des modes de réalisation de l'invention, ladite réserve d'additif contient un additif tel que défini en référence au procédé de l'invention.According to a preferred embodiment, combinable with each of the embodiments of the invention, said additive reserve contains an additive as defined with reference to the process of the invention.

L'additif peut présenter une température d'ébullition supérieure à celle du solvant et en particulier au mélange d'hydrocarbures non halogénés constituant ou compris dans le solvant.The additive may have a boiling temperature higher than that of the solvent and in particular the mixture of non-halogenated hydrocarbons constituting or included in the solvent.

Dans le cas de l'additif, ledit tensio-actif présente une température d'ébullition supérieure à celle du solvant.In the case of the additive, said surfactant has a boiling point higher than that of the solvent.

Selon un mode de réalisation préféré, l'installation comprend en amont du bouilleur de ladite colonne à distiller un filtre muni d'au moins un aimant. La Demanderesse a en effet constaté que les textiles de travail, en particulier les gants de découpe, sont souvent contaminés par des particules métalliques qui se sont fichées dans leur épaisseur lors de l'utilisation du gant. Ces particules métalliques sont susceptibles de boucher le circuit de circulation du solvant et d'abîmer les différents éléments du dispositif de nettoyage à sec. Les particules peuvent également être des fragments des fils métalliques contenus dans les gants. Le ou les aimants permettent d'arrêter les particules ferreuses en amont de la colonne à distiller, en sortie du tambour.According to a preferred embodiment, the installation comprises, upstream of the boiler of said distillation column, a filter provided with at least one magnet. The Applicant has in fact noted that work textiles, in particular cutting gloves, are often contaminated by metal particles which have become embedded in their thickness during use of the glove. These metal particles are likely to clog the solvent circulation circuit and damage the various elements of the dry cleaning device. The particles can also be fragments of the metal wires contained in the gloves. The magnet(s) make it possible to stop the ferrous particles upstream of the distillation column, at the outlet of the drum.

Avantageusement, ledit filtre est dimensionné de manière être au moins partiellement rempli dudit solvant sortant dudit tambour pendant la majorité de la durée d'écoulement dudit solvant vers ladite colonne à distiller et le ou lesdits aimants sont disposés de manière à être immergés dans le volume de solvant contenu dans ledit filtre. Les particules flottant dans le solvant contenu dans le filtre, elles sont facilement attirées par le ou les aimants. Le ou les aimants sont de préférence amovibles afin de les débarrasser facilement des particules qui les recouvrent avant leur réutilisation.Advantageously, said filter is dimensioned so as to be at least partially filled with said solvent leaving said drum for the majority of the duration of flow of said solvent towards said column to be distilled and said magnet(s) are arranged so as to be immersed in the volume of solvent contained in said filter. Since the particles float in the solvent contained in the filter, they are easily attracted to the magnet(s). The magnet(s) are preferably removable in order to easily remove the particles covering them before their reuse.

Le filtre n'est pas limité selon l'invention. Ses ouvertures et leur nombre sont sélectionnés en fonction du débit de solvant sortant du tambour. Le filtre est avantageusement concave, ce qui permet l'immersion du ou des aimants lorsque ces derniers, par exemple, sont simplement posés sur le fond du filtre.The filter is not limited according to the invention. Its openings and their number are selected according to the flow of solvent leaving the drum. The filter is advantageously concave, which allows the immersion of the magnet(s) when the latter, for example, are simply placed on the bottom of the filter.

La majorité de la durée d'écoulement signifie que pendant au moins la moitié de la durée d'écoulement, le liquide immerge le ou les aimants. Avantageusement, le filtre se remplit de manière à immerger le ou les aimants et le rapport débit sortant/ débit entrant est tel que le ou les aimants restent immergés jusqu'à ce que le filtre se vide lorsque le débit entrant est nul.Majority of flow time means that for at least half of the flow time, the liquid immerses the magnet(s). Advantageously, the filter fills so as to immerse the magnet(s) and the outgoing flow/incoming flow ratio is such that the magnet(s) remain immersed until the filter empties when the incoming flow is zero.

Avantageusement, ledit circuit de circulation comprend un séparateur gravimétrique solide/liquide qui est relié en sortie au bouilleur de la colonne à distiller et en entrée à la sortie du tambour. Ce séparateur permet de séparer notamment le liquide des particules solides qu'il contient. Les particules solides proviennent par exemple de l'attrition des textiles ; il s'agit de morceaux de textile ou de cuir.Advantageously, said circulation circuit comprises a gravimetric solid/liquid separator which is connected at the outlet to the boiler of the distillation column and at the inlet to the outlet of the drum. This separator makes it possible to separate the liquid from the solid particles it contains. Solid particles come, for example, from textile attrition; These are pieces of textile or leather.

Avantageusement, ledit circuit de circulation comporte un séparateur gravimétrique liquide/liquide relié au séparateur solide/liquide et qui permet la séparation entre une phase aqueuse et une phase organique. Ce séparateur permet de traiter la phase aqueuse qui se forme lorsque les textiles composites traités comportent des portions hydrophiles, comme le cuir ou le daim par exemple.Advantageously, said circulation circuit comprises a gravimetric liquid/liquid separator connected to the solid/liquid separator and which allows the separation between an aqueous phase and an organic phase. This separator makes it possible to treat the aqueous phase which forms when the treated composite textiles contain hydrophilic portions, such as leather or suede for example.

C'est en effet le mérite de la Demanderesse que d'avoir constaté qu'il se forme une phase aqueuse lors du traitement en dépit de l'absence d'introduction d'eau liquide dans le circuit de circulation. Cette eau provient des portions hydrophiles des textiles ; elle se lie au tensio-actif de l'additif et forme une phase aqueuse plus lourde que le solvant et qui peut être traitée dans l'installation de l'invention.It is in fact the merit of the Applicant to have noted that an aqueous phase forms during the treatment despite the absence of introduction of liquid water into the circulation circuit. This water comes from the hydrophilic portions of the textiles; it binds to the surfactant of the additive and forms an aqueous phase heavier than the solvent and which can be treated in the installation of the invention.

Avantageusement, ledit séparateur liquide/liquide comprend des moyens de mélange et est connecté à une réserve de sel minéral, notamment de NaCl. L'ajout de sel permet de casser l'émulsion et d'accélérer la séparation de phase.Advantageously, said liquid/liquid separator comprises mixing means and is connected to a reserve of mineral salt, in particular NaCl. Adding salt helps break the emulsion and accelerate phase separation.

Le solvant n'est pas limité selon l'invention. Il est dans tous les cas exempts d'hydrocarbures halogénés et de tout halogène.The solvent is not limited according to the invention. It is in all cases free of halogenated hydrocarbons and any halogen.

L'additif est utilisé de préférence lorsque le solvant ne contient pas de propanols alcoxylés.The additive is preferably used when the solvent does not contain alkoxylated propanols.

Le solvant peut avantageusement présenter un point d'ébullition égal ou supérieur à 170°C, notamment égal à de 180°C et inférieur ou égale à 190°C, un point éclair supérieur ou égale à 61 °C, notamment égal à 65°C, et inférieur ou égal à 72°C, une pression de vapeur saturante à 20°C supérieure ou égale à 45 Pa et notamment égale à 54 Pascal et inférieur ou égale à 65 Pa, une densité inférieure à celle de l'eau et notamment égale à 0,84 g/cm3 et une valeur KB mesurée selon la norme ASTM (Méthode D-1133) de 161.The solvent may advantageously have a boiling point equal to or greater than 170°C, in particular equal to 180°C and less than or equal to 190°C, a flash point greater than or equal to 61°C, in particular equal to 65°C. C, and less than or equal to 72°C, a saturated vapor pressure at 20°C greater than or equal to 45 Pa and in particular equal to 54 Pascal and less than or equal to 65 Pa, a density less than that of water and notably equal to 0.84 g/cm 3 and a KB value measured according to the ASTM standard (Method D-1133) of 161.

L'additif a de préférence un point éclair supérieur à 61°C.The additive preferably has a flash point above 61°C.

[Définitions][Definitions]

Au sens de l'invention, une huile d'usinage comprend ou est constituée d'un mélange d'hydrocarbures saturés ou aromatiques comprenant de 15 à 40 atomes de carbone et ne comprenant pas d'atome d'halogène. Une huile minérale peut également être une émulsion aqueuse (huile dans l'eau ou eau dans l'huile) et contenir divers agents actifs dont des bactéricides et des agents antimousses, par exemple.For the purposes of the invention, a machining oil comprises or consists of a mixture of saturated or aromatic hydrocarbons comprising from 15 to 40 carbon atoms and not comprising a halogen atom. A mineral oil can also be an aqueous emulsion (oil in water or water in oil) and contain various active agents including bactericides and antifoaming agents, for example.

Le terme « isotridécanol» désigne le 11-méthyl dodécan-1-ol.The term “isotridecanol” refers to 11-methyl dodecan-1-ol.

Les termes « isotridécanol éthoxylé » désignent le produit de réaction entre le 11-méthyl dodécan-1-ol et oxyde d'éthylène.The terms “ethoxylated isotridecanol” designate the reaction product between 11-methyl dodecan-1-ol and ethylene oxide.

Au sens de l'invention, le nettoyage à sec désigne le nettoyage par utilisation d'un solvant ou véhicule autre que l'eau.For the purposes of the invention, dry cleaning designates cleaning using a solvent or vehicle other than water.

[Brève description des figures][Brief description of the figures]

Les caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante s'appuyant sur la figure 1 :

  • la Fig. 1 représente de manière schématique un mode de réalisation de l'invention.
The characteristics and advantages of the invention will appear on reading the following description based on the figure 1 :
  • there Fig. 1 schematically represents an embodiment of the invention.

[Exemple][Example]

En référence à la Fig. 1, un mode de réalisation particulier de l'installation de l'invention va maintenant être décrit.In reference to the Fig. 1 , a particular embodiment of the installation of the invention will now be described.

L'installation comprend un dispositif de nettoyage à sec étanche contenant un tambour rotatif 1, un réservoir de solvant 12 et une réserve d'additif 14. La réserve d'additif 14 et la réserve de solvant 12 sont reliées au tambour 1 par des conduites munies d'électrovannes commandables. Le dispositif de nettoyage est équipé d'une buse de pulvérisation (non représentée) qui permet de pulvériser l'additif contenu dans la réserve 12 dans le tambour 1, notamment lorsque celui-ci tourne. Le tambour 1 permet d'essorer également les articles une fois qu'ils ont été imbibés par le solvant et l'additif et qu'ils ont été suffisamment brassés dans le tambour 1. Le liquide extrait par centrifugation du tambour 1 passe par la conduite 3 et tombe dans un filtre 5 qui contient un aimant 7. Cet aimant 7 permet de retenir toutes les particules en matériau ferreux qui ont été extraites des articles. On évite ainsi de boucher les conduites du dispositif. Le liquide sortant du filtre 5 est envoyé dans un séparateur gravimétrique 8 solide/liquide. Le séparateur 8 est connecté au bouilleur 95 de la colonne à distiller 9. Le circuit de refroidissement du condenseur 93 de la colonne à distiller 9 est alimenté en eau provenant du réseau de ville. Cette eau circule donc dans un circuit séparé du circuit de circulation hermétique qui relie le tambour 1, les réserves 12 et 14, le bouilleur 95, la colonne à distiller 9, le condenseur 93 et les deux séparateurs 8 et 81. Elle n'est donc jamais en contact avec le solvant mais vient se réchauffer à son contact dans le condenseur 93, provoquant alors la condensation du solvant. La sortie du condenseur 93 est reliée au réservoir 12 et/ou à l'entrée du bouilleur 95 de la colonne à distiller 9. Le séparateur solide/liquide 8 est connecté à un séparateur liquide/liquide 81. La partie haute du séparateur liquide/liquide 81 est connectée à la réserve de solvant 12 et/ou au bouilleur 95 de la colonne à distiller 9. (ces connexions via des conduites non représentées, par souci de clarté, sont indiquées par des étoiles sur la Fig. 1).The installation comprises a sealed dry cleaning device containing a rotating drum 1, a solvent tank 12 and an additive reserve 14. The additive reserve 14 and the solvent reserve 12 are connected to the drum 1 by pipes equipped with controllable solenoid valves. The cleaning device is equipped with a nozzle of spraying (not shown) which makes it possible to spray the additive contained in the reserve 12 in the drum 1, in particular when the latter rotates. The drum 1 also allows the articles to be drained once they have been soaked with the solvent and the additive and have been sufficiently mixed in the drum 1. The liquid extracted by centrifugation from the drum 1 passes through the pipe 3 and falls into a filter 5 which contains a magnet 7. This magnet 7 makes it possible to retain all the particles of ferrous material which have been extracted from the articles. This avoids blocking the pipes of the device. The liquid leaving the filter 5 is sent to a gravimetric solid/liquid separator 8. The separator 8 is connected to the boiler 95 of the distillation column 9. The cooling circuit of the condenser 93 of the distillation column 9 is supplied with water coming from the city network. This water therefore circulates in a circuit separate from the hermetic circulation circuit which connects the drum 1, the reserves 12 and 14, the boiler 95, the distillation column 9, the condenser 93 and the two separators 8 and 81. It is not therefore never in contact with the solvent but heats up on contact in the condenser 93, then causing condensation of the solvent. The outlet of the condenser 93 is connected to the tank 12 and/or to the inlet of the boiler 95 of the distillation column 9. The solid/liquid separator 8 is connected to a liquid/liquid separator 81. The upper part of the liquid/liquid separator liquid 81 is connected to the solvent reserve 12 and/or to the boiler 95 of the distillation column 9. (these connections via pipes not shown, for the sake of clarity, are indicated by stars on the Fig. 1 ).

Le circuit d'eau de refroidissement du condenseur 93 est indiqué en pointillés sur la Fig. 1. La sortie du circuit de refroidissement du condenseur 93 est connectée à un réservoir calorifugé 55, lequel est connecté à une machine à laver 56. Le réservoir calorifugé 55 est connecté à un échangeur thermique 67 qui permet de refroidir l'eau contenue dans le réservoir 55. La sortie de l'échangeur thermique 67 est raccordée à l'entrée du circuit de refroidissement du condenseur 93. Le raccordement est symbolisé par deux étoiles.The cooling water circuit of condenser 93 is indicated in dotted lines on the Fig. 1 . The outlet of the cooling circuit of the condenser 93 is connected to a heat-insulated tank 55, which is connected to a washing machine 56. The heat-insulated tank 55 is connected to a heat exchanger 67 which makes it possible to cool the water contained in the tank 55 The outlet of the heat exchanger 67 is connected to the inlet of the cooling circuit of the condenser 93. The connection is symbolized by two stars.

Toutes les vannes de réglage des débits ont été omises sur le schéma 1, par souci de clarté.All flow adjustment valves have been omitted from Figure 1 for clarity.

Le filtre 5 a une forme concave et l'aimant 7 est disposé de manière à être au moins partiellement immergé par le liquide sortant du tambour 1, ceci afin de faciliter la capture des particules ferreuses par l'aimant 7.The filter 5 has a concave shape and the magnet 7 is arranged so as to be at least partially immersed by the liquid leaving the drum 1, this in order to facilitate the capture of ferrous particles by the magnet 7.

Le procédé de l'invention va maintenant être décrit en référence à la Fig. 1. Le procédé de l'invention et l'installation de l'invention sont particulièrement adaptés au nettoyage de gants de travail, en particulier aux gants de découpe anti-coupure qui comporte des parties en cuir. Le cuir est un matériau hydrophile qui retient l'eau dans une certaine mesure.The process of the invention will now be described with reference to the Fig. 1 . The method of the invention and the installation of the invention are particularly suitable for cleaning work gloves, in particular anti-cut cutting gloves which have leather parts. Leather is a hydrophilic material that retains water to a certain extent.

Les gants sont introduits dans le tambour 1. Le solvant provenant de la réserve 12 est introduit dans le tambour 1. On fait tourner le tambour de manière à imbiber les gants. On vaporise ensuite l'additif sur les gants imbibés. On continue le brassage des gants dans le tambour 1. Le brassage limite l'usure des textiles et permet de réutiliser les gants et de les nettoyer plusieurs fois. Au bout d'une durée donnée que l'Homme du métier est capable de déterminer par expérimentation, on essore les gants qui sont ensuite retirés du tambour et éventuellement séchés si besoin est. Le liquide sortant du tambour est donc un mélange du solvant, de l'additif, d'eau entrainée notamment par le tensio-actif de l'additif, de particules métalliques, textiles et/ou de cuir. Le liquide sortant est versé sur le filtre 5. Le liquide entourant l'aimant 7, les particules ferreuses en suspension viennent facilement se coller sur l'aimant 7. Le liquide filtré est introduit dans le séparateur solide/liquide 8 qui permet de le débarrasser des boues formées par les particules solides et les morceaux de textiles. La phase liquide est envoyée dans le bouilleur 95 de la colonne à distiller 9. La température dans la colonne à distiller 9 est telle qu'elle permet l'évaporation du solvant ou au moins du mélange d'hydrocarbure qu'il contient. Le solvant est ensuite condensé dans le condenseur 93 et renvoyé vers la réserve de solvant 12 ou vers le bouilleur 95 de la colonne à distiller 9 pour une seconde distillation. L'eau de refroidissement sortant du condenseur 93 est envoyée dans le réservoir calorifugé 55 ou transite dans ce dernier pour parvenir à la machine à laver 56. L'eau non utilisée pour la machine à laver 56 passe à travers l'échangeur de chaleur 67, s'y refroidit et est envoyée vers l'entrée du circuit de refroidissement du condenseur 93. L'échangeur de chaleur 67 permet de réchauffer le local où se trouve l'installation.The gloves are introduced into the drum 1. The solvent coming from the reserve 12 is introduced into the drum 1. The drum is rotated so as to soak the gloves. The additive is then sprayed onto the soaked gloves. We continue to mix the gloves in drum 1. The mixing limits the wear of the textiles and allows the gloves to be reused and cleaned several times. After a given period of time that a person skilled in the art is capable of determining by experiment, the gloves are wrung out and then removed from the drum and possibly dried if necessary. The liquid leaving the drum is therefore a mixture of the solvent, the additive, water entrained in particular by the surfactant of the additive, metal, textile and/or leather particles. The outgoing liquid is poured onto the filter 5. The liquid surrounding the magnet 7, the ferrous particles in suspension easily stick to the magnet 7. The filtered liquid is introduced into the solid/liquid separator 8 which allows it to be removed sludge formed by solid particles and pieces of textiles. The liquid phase is sent to the boiler 95 of the distillation column 9. The temperature in the distillation column 9 is such that it allows the evaporation of the solvent or at least of the hydrocarbon mixture which it contains. The solvent is then condensed in the condenser 93 and returned to the solvent reserve 12 or to the boiler 95 of the distillation column 9 for a second distillation. The cooling water leaving the condenser 93 is sent to the heat-insulated tank 55 or passes through the latter to reach the washing machine 56. The water not used for the washing machine 56 passes through the heat exchanger 67 , cools there and is sent to the inlet of the cooling circuit of the condenser 93. The heat exchanger 67 makes it possible to heat the room where the installation is located.

Le mélange restant dans le bas de la colonne après distillation du solvant est introduit dans un séparateur gravimétrique liquide/liquide 81. Une séparation de phase apparait alors. On retrouve en bas du séparateur 81 une phase aqueuse contenant le tensioactif de l'additif tandis que la phase supérieure contient encore du solvant. La phase supérieure est envoyée vers le bouilleur 95 ou vers la réserve de solvant 12. Il est également possible de connecter le séparateur liquide/liquide 81 à une réserve de sel(s) (non représenté). L'ajout de sel permet de favoriser et d'accélérer la séparation de phase dans le séparateur liquide/liquide 81. Dans ce cas, le séparateur 81 comprend également des moyens de mélange et devient un mélangeur/décanteur. Les durées des traitements, les débits du solvant et de l'additif, la quantité de textiles traités, les températures et pression sont ajustables expérimentalement par l'Homme du Métier.The mixture remaining at the bottom of the column after distillation of the solvent is introduced into a gravimetric liquid/liquid separator 81. A phase separation then appears. We find at the bottom of the separator 81 an aqueous phase containing the surfactant of the additive while the upper phase still contains solvent. The upper phase is sent to the boiler 95 or to the solvent reserve 12. It is also possible to connect the liquid/liquid separator 81 to a solvent reserve. salt(s) (not shown). The addition of salt makes it possible to promote and accelerate the phase separation in the liquid/liquid separator 81. In this case, the separator 81 also includes mixing means and becomes a mixer/decanter. The durations of the treatments, the flow rates of the solvent and the additive, the quantity of textiles treated, the temperatures and pressure are adjustable experimentally by those skilled in the art.

Claims (14)

Procédé de dégraissage à sec, notamment pour des articles textiles composites, en particulier des gants de travail, partiellement recouverts de graisse minérale, caractérisé en ce que l'on imbibe lesdits articles avec un solvant comprenant/constitué d'un mélange d'alcanes exempts d'halogène puis en ce que l'on vaporise éventuellement sur lesdits articles imbibés un additif comprenant ou constitué d'un mélange d'hydrocarbures aliphatiques exempts d'halogène et/ou d'au moins un tensio-actif non ionique et/ou cationique et ayant une température d'ébullition supérieure à celle dudit solvant, en ce que l'on exerce une action mécanique sur lesdits articles, notamment en ce que l'on brasse lesdits articles, en ce que l'on essore ensuite lesdits articles, en ce qu'on distille le mélange liquide issu de l'essorage de manière à séparer ledit premier solvant ou au moins ledit mélange d'alcanes exempts d'halogènes qu'il contient et en ce qu'éventuellement on réutilise le distillat pour dégraisser des articles textiles.Dry degreasing process, in particular for composite textile articles, in particular work gloves, partially covered with mineral grease, characterized in that said articles are impregnated with a solvent comprising/consisting of a mixture of free alkanes halogen then in that said soaked articles are optionally sprayed with an additive comprising or consisting of a mixture of aliphatic hydrocarbons free of halogen and/or at least one nonionic and/or cationic surfactant and having a boiling temperature higher than that of said solvent, in that a mechanical action is exerted on said articles, in particular in that said articles are stirred, in that said articles are then wrung, in that the liquid mixture resulting from the spinning is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and in that possibly the distillate is reused to degrease articles textiles. Procédé selon la revendication 1, caractérisé en ce que l'on condense le distillat avec de l'eau à une température inférieure à la température du distillat en sortie de distillation et en ce que l'on utilise l'eau ayant servi à la condensation pour chauffer un local et/ou pour laver d'autres articles textiles avec un détergent.Process according to claim 1, characterized in that the distillate is condensed with water at a temperature lower than the temperature of the distillate leaving the distillation and in that the water used for the condensation is used. to heat a room and/or to wash other textile items with detergent. Procédé selon la revendication 1 ou 2, caractérisé en ce que lesdits articles à traiter comprennent des parties en cuir et/ou en daim au moins partiellement recouvertes d'une huile minérale.Method according to claim 1 or 2, characterized in that said articles to be treated comprise parts of leather and/or suede at least partially covered with a mineral oil. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit premier solvant est choisi parmi : - les solvants comprenant/constitués d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 13 atomes de carbone, dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques et d'un mélange de propanols alcoxylés, ledit mélange de propanols alcoxylés représentant de 50% à 70 % en masse dudit solvant ; - les solvants comprenant/constitués de 50% à 100% en masse d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 14 atomes de carbone dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques, les hydrocarbures aliphatiques représentant au moins 30% du mélange ; et leurs mélanges.Process according to any one of claims 1 to 3, characterized in that said first solvent is chosen from: - solvents comprising/consisting of a mixture of hydrocarbons free of halogens and containing 11 to 13 carbon atoms, including iso alkanes and less than 2% by mass of aromatic hydrocarbons and a mixture of alkoxylated propanols , said mixture of alkoxylated propanols representing 50% to 70% by mass of said solvent; - solvents comprising/consisting of 50% to 100% by mass of a mixture of hydrocarbons free of halogens and containing 11 to 14 carbon atoms including iso alkanes and less than 2% by mass of aromatic hydrocarbons, aliphatic hydrocarbons representing at least 30% of the mixture; and their mixtures. Procédé selon l'un quelconque des revendications précédentes, caractérisé en ce que ledit additif est choisi parmi : - les additifs comprenant/constitués de 25% à 50% en masse d'un mélange d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 14 atomes de carbone dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques, moins de 15% en masse de docusate de sodium, moins de 10% en masse de phosphates d'alpha hydro oméga hydroxy mono alkyl éthers en C12-C14, moins de 5% ou 2,5 %en masse d'isotridécanol éthoxylé, moins de 2,5% en masse de 1-amino-propane-2-ol et moins de 0,1% d'alpha hexylcinnamaldéhyde ; et - les additifs comprenant/constitués de moins de 25% en masse d'un mélange d'un mélange d'hydrocarbures exempts d'halogènes et contenant de 11 à 14 atomes de carbone dont des iso alcanes et moins de 2% en masse d'hydrocarbures aromatiques, moins de 15% en masse de docusate de sodium, moins de 5% en masse de phosphate d'alcools éthoxylés en C12-C14, moins de 5% ou moins de 2% en masse d'isotridécanol éthoxylé et moins de 2% en masse de 1-amino-propane-2-ol ; et leurs mélanges.Process according to any one of the preceding claims, characterized in that said additive is chosen from: - additives comprising/consisting of 25% to 50% by mass of a mixture of a mixture of hydrocarbons free of halogens and containing 11 to 14 carbon atoms including iso alkanes and less than 2% by mass of aromatic hydrocarbons, less than 15% by mass of sodium docusate, less than 10% by mass of alpha hydro omega hydroxy mono alkyl ethers C 12 -C 14 phosphates, less than 5% or 2.5% by mass ethoxylated isotridecanol, less than 2.5% by mass of 1-amino-propan-2-ol and less than 0.1% alpha hexylcinnamaldehyde; And - additives comprising/consisting of less than 25% by mass of a mixture of a mixture of hydrocarbons free of halogens and containing 11 to 14 carbon atoms including iso alkanes and less than 2% by mass of aromatic hydrocarbons, less than 15% by mass of sodium docusate, less than 5% by mass of C 12 -C 14 ethoxylated alcohol phosphate, less than 5% or less than 2% by mass of ethoxylated isotridecanol and less 2% by weight of 1-amino-propan-2-ol; and their mixtures. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on filtre ledit mélange liquide issu de l'essorage avant de le distiller.Method according to any one of the preceding claims, characterized in that said liquid mixture resulting from the spinning is filtered before distilling it. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits articles comportant des particules métalliques, on extrait lesdites particules métalliques contenues dans ledit mélange liquide issu de l'essorage avant de le distiller.Method according to any one of the preceding claims, characterized in that said articles comprising metallic particles, said metallic particles contained in said liquid mixture resulting from the spinning are extracted before distilling it. Procédé selon la revendication 7, caractérisé en ce que l'on extrait lesdites particules métalliques au moyen d'au moins un aimant et en ce que de préférence , on extrait lesdites particules métalliques pendant la filtration, si l'on filtre ledit mélange liquide.Method according to claim 7, characterized in that said metal particles are extracted by means of at least one magnet and in that preferably, said metal particles are extracted during filtration, if said liquid mixture is filtered. Procédé selon la revendication 8, caractérisé en ce que l'on filtre ledit mélange liquide et en ce que pendant la filtration on immerge ledit ou lesdits aimants dans ledit mélange liquide issu de l'essorage de manière à fixer lesdites particules métalliques sur ledit ou lesdits aimants.Method according to claim 8, characterized in that said liquid mixture is filtered and in that during filtration said magnet(s) are immersed in said liquid mixture resulting from the spinning so as to fix said metal particles on said(s) magnets. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on sépare par gravimétrie les particules solides contenues dans ledit mélange liquide issu de l'essorage avant de le distiller.Method according to any one of the preceding claims, characterized in that the solid particles contained in said liquid mixture resulting from the spinning are separated by gravimetry before distilling it. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on sépare par gravité la phase aqueuse et la phase organique contenues dans ledit mélange liquide issu de l'essorage avant de le distiller.Process according to any one of the preceding claims, characterized in that the aqueous phase and the organic phase contained in said liquid mixture resulting from the spinning are separated by gravity before distilling it. Procédé selon la revendication 10 et la revendication 11, caractérisé en ce que l'on sépare ladite phase aqueuse de ladite phase organique après avoir séparé ledit mélange liquide issu de l'essorage desdites particules solides.Method according to claim 10 and claim 11, characterized in that said aqueous phase is separated from said organic phase after having separated said liquid mixture resulting from the spinning of said solid particles. Procédé selon l'une quelconque des revendications 11 et 12, caractérisé en ce que l'on distille ladite phase organique de manière à séparer ledit premier solvant ou au moins ledit mélange d'alcanes exempts d'halogènes qu'il contient et en ce que l'on réutilise le distillat condensé pour dégraisser à nouveau des articles.Process according to any one of claims 11 and 12, characterized in that said organic phase is distilled so as to separate said first solvent or at least said mixture of halogen-free alkanes which it contains and in that the condensed distillate is reused to degrease articles again. Procédé selon l'une quelconque des revendications 11 à 13, caractérisé en ce que on sépare par gravité la phase aqueuse et phase organique contenues dans le mélange liquide restant après la distillation, éventuellement sous agitation et/ou ajout de chlorure de sodium et en ce qu'éventuellement on utilise ladite phase organique pour le nettoyage d'autres articles sans distillation préalable ou après distillation, le distillat étant ainsi réutilisé pour le dégraissage.Process according to any one of claims 11 to 13, characterized in that the aqueous phase and organic phase contained in the liquid mixture remaining after distillation are separated by gravity, optionally with stirring and/or addition of sodium chloride and in this that possibly said organic phase is used for cleaning other articles without prior distillation or after distillation, the distillate thus being reused for degreasing.
EP23171428.8A 2022-05-19 2023-05-03 Method for dry cleaning composite textile articles Pending EP4279650A1 (en)

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Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR