EP0717789B1 - Compositions et procedes de traitement d'un solvant de nettoyage - Google Patents

Compositions et procedes de traitement d'un solvant de nettoyage Download PDF

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Publication number
EP0717789B1
EP0717789B1 EP95925520A EP95925520A EP0717789B1 EP 0717789 B1 EP0717789 B1 EP 0717789B1 EP 95925520 A EP95925520 A EP 95925520A EP 95925520 A EP95925520 A EP 95925520A EP 0717789 B1 EP0717789 B1 EP 0717789B1
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EP
European Patent Office
Prior art keywords
solvent
parts
composition
alkyl
washing 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.)
Expired - Lifetime
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EP95925520A
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German (de)
English (en)
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EP0717789A1 (fr
EP0717789A4 (fr
Inventor
Esfandiar Kiany
Bruce Blair
Anne O'donnell
Stephen Lee Kunkel
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Safety Kleen Systems Inc
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Safety Kleen Systems Inc
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/024—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C11D7/34—Organic compounds containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5027—Hydrocarbons
    • 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
    • C11D7/24—Hydrocarbons

Definitions

  • the present invention relates generally to automotive, industrial, and commercial parts cleaning, and, more particularly, to improved formulations for increasing the effectiveness of cleaning solvents.
  • parts washers which include a sink or the like positioned atop a reservoir of hydrocarbon-based solvent and wherein this solvent is circulated from the reservoir though a pump and directed over the parts being cleaned from a nozzle at the end of a conduit or the like.
  • Parts washers usina such hydrocarbon-based solvents include those of the general type described in U.S. Patent 3,522,814, of which many hundreds of thousands have been sold and/or are in use.
  • the dirt entrained therein includes finely dispersed particles, many of which may be of sub-micrometre (sub-micron) size. While sand, gravel, metal filings, and the like cleaned from dirty or greasy parts rapidly settle out, a significant portion of the contaminants in solvent used for parts washing is comprised of very fine particles that are resistant to settling. As a result, while the solvent's cleaning effectiveness may not be impaired, due to the dispersed and unsettled contamination, it may be difficult to determine visually that the solvent can still be used effectively. Consequently, such solvent may be changed more often than needed.
  • sub-micrometre sub-micron
  • WO 91/19831 discloses compositions and methods for removal of grime, grease, oil and other contaminants from surfaces by employing cleaning compositions comprising cycloparaffins (e.g. cycloalkanes), branched paraffins, and at least about 0.1 wt. % of a nonionic or ionic surfactant.
  • Ionic surfactants used include C 8 -C 18 fatty acid sulfonic acids or salts thereof, or alkyl benzene sulfonic acids or salts thereof where the alkyl group is preferably linear C 8 -C 18 alkyl, such as dodecylbenzene sulfonic acid or sodium salt thereof.
  • a cleaning composition is prepared by mixing 1 vol.% (1.2wt.%) sodium dodecyl benzene sulfonate with 99 vol. % (98.8 wt.%) Conoco XP-15 (having a flash point of 150°F (65.6°C) and primarily comprising C 11 -C 13 cycloparaffins and C 11 -C 13 branched paraffins); the mixture is heated to 40°C and a grease-contaminated aluminium piece is then dipped for 5 min into the mixture with agitation to remove the grease.
  • Conoco XP-15 having a flash point of 150°F (65.6°C) and primarily comprising C 11 -C 13 cycloparaffins and C 11 -C 13 branched paraffins
  • the hydrocarbon can be an aliphatic hydrocarbon liquid having a flashpoint greater than 140°F (60°C) and can be present in 50-95 %.
  • US Patent 3,193,499 discloses a composition suitable for removing waxy deposits consisting essentially of an isoparaffinic hydrocarbon liquid containing substantially only isoparaffins, said liquid boiling at 335-475°F (168-246°C), and a small amount (e.g. 3.5-5.2%) of calcium petroleum sulphonate.
  • US Patent 4,407,707 discloses a process for removing finely divided solids from oils characterized as unconventional whole heavy crudes, heavy petroleum crude fractions and residua, syncrudes, syncrude fractions, and syncrude residua, particularly shale oil and shale oil fractions.
  • the process comprises dispersing about 10-5000 parts, per million parts of oil by volume, of an admixture of surfactant and demulsifier within said oil; admixing with washwater and emulsifying; separating the emulsion into two phases and recovering the oil phase; followed by further water-washing, heating, emulsifying, coalescing, emulsion-separating, and oil-phase recovery steps.
  • the surfactant comprises (A) an ethoxylated or propoxylated 1,4-sorbitan ester, and preferably also comprises (B) a substituted benzene monosulfonic acid. More preferably, the surfactant comprises (A), (B), and (C) a salt of a substituted benzene monosulfonic acid.
  • the demulsifier comprises an alkoxylated phenol formaldehyde resin, substituted at a position para to the alkoxy group by a hydrocarbyl group (e.g.
  • alkoxylated resin must be ethoxylated or propoxylated or admixed ethoxylated/propoxylated.
  • the first aspect of the present invention provides a method of providing accelerated and enhanced settling of finely dispersed contaminants accumulating through use in a parts washing solvent, said parts washing solvent comprising not more than 20 percent aromatic solvent and the balance aliphatic and other solvents and said contaminants, said parts washing solvent having a flash point of at least 37.8°C (100°F); said method comprising treating said parts washing solvent with an additive composition to provide agglomeration and settling of contaminant particles creating turbidity in the parts washing solvent, said additive composition comprising at least one compound selected from the class consisting of aromatic, aliphatic and alkaryl sulfonic acids and sulfonic acid salts, and alkyl phenol formaldehyde resins modified so as to include alkoxy solubilizing groups forming a part thereof, and mixtures of said acids or acid salts and said resins, said treated solvent thus being capable of re-use for washing parts, said additive composition being added to the parts washing solvent in an amount to provide from 0.01 parts to 5 parts
  • the second aspect of the present invention provides a mineral spirits-based parts washing solvent composition, said composition comprising primarily aliphatic hydrocarbons and not more than 15 percent aromatic solvents, said composition having dispersed therein an additive composition adapted to accelerate settling of dispersed particles, said additive composition comprising an alkyl sulfonic acid and a mixture of alkoxylated lower-alkyl phenol-formaldehyde resins, wherein said lower-alkyl substituent is an alkyl substituent having from 4 to 11 carbon atoms, the alkyl sulfonic acid and the mixture of resins being present in a combined amount of from 0.01 up to 5.0 parts per 100 parts of solvent.
  • the third aspect of the present invention provides a method of cleaning parts using a parts washing solvent, said method including the steps of cleaning parts with a mass of parts washing solvent having a flashpoint of greater than 37.8°C (100°F) and comprising not more than 20% aromatic solvents and the remainder aliphatic and other solvents until said solvent suffers reduced visual clarity and attains a suspended particle concentration in excess of 500 ppm, and thereafter treating said solvent by a method as described in the first aspect of the present invention.
  • one important object of the present invention is to provide a solvent which, when used in a parts cleaning or similar operation, will provide maximum settling out of particulate contaminants in the shortest possible time, with the object of effectively dividing a mass or volume of solvent into a relatively clear supernatant layer overlying a contaminant-rich lower layer of greatly decreased volume in relation to the volume of the supernatant layer, certain baseline criteria were established using existing cleaning solvent. For this purpose, and for providing the controls used in the examples referred to herein, several operations were conducted. Before referring in detail to these operations, a general description of them will be furnished.
  • the solvent used as a baseline and considered to be typical of contaminated parts washers solvent was taken from parts washing machines in the midwest periodically serviced by the assignee of this invention. Depending upon the duty cycle or the work load at any particular location, parts washers are serviced at varying intervals by picking up old, contaminated solvent and replacing it with new fresh solvent. The pickup intervals usually range from two to twelve weeks.
  • the solvent in many instances originally comprises a batch of 68 litres (18 US gallons) for a 114 litre (30 US gallon) parts washer unit of the type shown in U.S. Patent No. 3,522,814.
  • the residual dirty solvent therefrom is picked up by a serviceperson, and this solvent is ultimately all combined into a holding tank at a service center.
  • solvent batches are normally collected from the service centers and taken to a recycling center where recycling operations are performed on the solvent.
  • each individual parts washer may be a source of used solvent which is quite different from that of another given individual parts washer.
  • the parts washers use a solvent which is primarily aliphatic but may contain up to 15 percent aromatic components, and has a flashpoint of 40.6°C (105°F) or higher or as solvent "SK-105". This is sometimes referred to herein, and in the charts and tables as a standard solvent.
  • the aliphatic component usually is made up primarily of C 8 -C 13 alkanes.
  • a higher flashpoint solvent such as a 99+ percent aliphatic solvent is provided, and this solvent has a flashpoint of 60-65.6°C (140°-150°F) or higher.
  • the hydrocarbons are usually a mix of C 9 -C 15 alkanes. This solvent is sometimes referred to herein, and in the charts and tables as solvent "P-150".
  • pickup of used solvent or incident to a service call occurs when users of the service encounter one of two conditions.
  • One of these conditions results from a diminution in the effectiveness of the solvent for cleaning purposes when it becomes saturated, or nearly so, with solubilized contaminants such as oil, or suspended particles of grease and other components that are truly soluble in the solvent.
  • effective solvent action is no longer possible; the solvent has exhausted its potential as a cleaning agent and is no longer effective.
  • recyclinq is the only choice left.
  • the contaminated solvent received from a solvent collection and replacement service center was initially analyzed to provide a base-line or control for the various experiments referred to herein.
  • One of the first steps performed was simply to pour a series of specimens or aliquot portions of used solvent into a graduated cylinder, a specially equipped drum, or the like and note the extent to which observable turbidity will spontaneously dissipate, i.e., whether and to what extent to which the solvent will separate spontaneously into two or more layers, one clean and one dirty.
  • the particle size range of solid contaminants suspended in PWS was divided into seven groups, ranging from 70+ ⁇ m (microns) to 0.45 ⁇ m (microns), as is described later.
  • a material that might be effective to create solids separation from a solvent should desirably be able to remain effective when a treated volume of solvent, already contaminated to a certain extent, is subsequently subjected to additional contamination.
  • tests were performed wherein a given batch of solvent was divided into several aliquot portions. When the first aliquot portion was subjected to chemical additions to effect a clarifying or particulate settling action, the supernatant layer contained a greatly diminished level of contaminants. In order to determine the continuing effectiveness of such additives, more contaminants were added in a plurality of subsequent steps.
  • an advantageous solvent treatment will have the advantage of at least initiating, perhaps continuing contaminant separation, preferably at a relatively high rate. Additionally, a favorable product will be able to continue to provide layer formation and contaminant separation generally over a relatively extended period of time, including time during which clarifying chemicals are periodically added. Another aspect, which is equally important, in the visual appearance of the supernatant. This is because its appearance is often a controlling factor in determining when to initiate recycling.
  • pretreated solvent which, in addition to its customary or conventional makeup of substantially all aliphatic hydrocarbons or of primarily hydrocarbons with up to 20% aromatic solvents, is meant a solvent that has had material of a different character added thereto to promote settlement or interface formation.
  • WO 9 601 915 filed 25.01. 1996.
  • Such pretreatment is of a type wherein polar solvents, including but not limited to C 8 -C 10 alcohols, diols, glycols, polyols, and glycol ethers are added to the hydrocarbon solvent.
  • polar solvents including but not limited to C 8 -C 10 alcohols, diols, glycols, polyols, and glycol ethers are added to the hydrocarbon solvent.
  • the addition of such chemicals makes it possible to maximize the effect of using treatment additives of the kind referred to herein.
  • the additive compositions described herein are effective in the absence of such pretreatment, they are advantageously also used with pretreated solvent.
  • the additive compositions of the present invention may be used one or more times to enhance particle separation from used cleaning solvent.
  • the concentration of suspended solids in class 4, i.e., 10-20 ⁇ was much greater than the concentration of any other particle size range.
  • feed 4 there were between 7,500 and almost 11,000 ppm in class 4, i.e., the range of 10-20 ⁇ .
  • feed 4 there were about 3,000 of the 70+ ⁇ m (micron) size particles (class 1), and in feeds 2 and 3, there were about 2,000 each of two different sizes, one being the 30-70 ⁇ m (micron) size (class 2) and the other comprising about 2,000 of the 5-10 ⁇ size (class 5).
  • the particles sizes sought to be separated fell in greatest proportion within the 10-20 ⁇ m (micron) size (class 4), such size range containing anywhere from just more than 2 to over 5 times the content of any other size range.
  • one aspect of the invention is to provide an additive composition and method which greatly facilitates spontaneous separation in untreated solvent, and in another aspect of the invention is the ability of separation-enhancing additives to cooperate with solvent compositions which have previously been treated with the alcohol/diol/glycol/polyol/glycol ether compositions referred to in the above copending application.
  • solvent compositions which have previously been treated with the alcohol/diol/glycol/polyol/glycol ether compositions referred to in the above copending application.
  • Such products include, but are not limited to, 2-ethyl-1,3-hexanediol, diethylene glycol mono-butyl ether and propylene glycol and butyl ether.
  • CA-3 A mixture of petroleum naphtha, ammonium alkyl sulfonates and diethylene glycol mono-butyl ether.
  • (DEGBE) CA-4 A mixture of petroleum sulfonates, esterified polyols and CA-1.
  • the structure of the main constituent of CA-1 is believed to comprise the following or a similar structure:
  • R is C 4 -C 9 ; n is an integer of 1 or greater, and the molecular weight is usually from 500-10,000.
  • a preliminary screening was done using these additives with an SK-105 solvent, to determine whether such additives, with parts washer solvents, would develop an interface, and if so, where and to what extent after a given settling time.
  • the solvent in these examples was not intentionally treated with any other composition.
  • Chart 2 shows the compositions and the results, with interface height in arbitrary units reflecting the height of a graduated cylinder on the vertical axis and settling time in minutes on the horizontal axis.
  • Column 1 is the control;
  • Column 2 is CA-4;
  • Column 3 is CA-1; and
  • Column 4 is CA-2.
  • the left hand column is a control, expressed in terms of TSS, and showing the supernatant of an untreated, solvent.
  • Column 2 shows solvent treated with 0.2 pph (parts per hundred) of CA-3 and 2 pph water.
  • Column 3 is the same as column 2 except that the clarifying additive is CA-2.
  • Column 4 is the same as columns 2 and 3 except that the clarifying agent is CA-1 and 2 pph of AI-1 is present.
  • Column 5 is the same as column 2 except that no water is present.
  • Column 6 is a solvent treated only with 2 pph each of AI-1 and water.
  • Chart 4 shows the quality of the supernatant after only 60 minutes of settling.
  • the control is compared with a second column treated with CA-4, and a third column reflecting treatment with CA-1.
  • the results range from 250 to 500 parts per million of total suspended solids after 60 minutes.
  • Chart 5 shows similar findings except that a longer settling time was permitted and the performance of CA-2 is reflected in the fourth column.
  • Chart 6 below is similar to Chart 5 above, except that the clarity of the supernatant is expressed in terms of turbidity rather than total suspended solids.
  • the first column is the control; the second column is the control after treatment with CA-4; the third column reflects treatment of the control with CA-1 and the fourth column is the control treated with CA-2.
  • the turbidity is expressed in units of NTU/5. Consequently, the readings are approximately five times higher than they would be according to the prior example, i.e., where turbidity units are NTU/25. If fully diluted, each of the specimens shown in this chart would equal or approach the 10 unit threshold for solvent that is clear enough to be considered a highly satisfactory product.
  • Chart 7, below shows turbidity readings after fifteen minutes and 24 hours with a combination of the other treatment ingredients in different proportions.
  • the left hand column shows a control with 2 parts CA-2, also treated with 2 parts each of 2-ethyl-1,3-hexanediol (hereinafter "EHD") and water; column 2 shows the same ingredients with 2 parts CA-2 but .5 part EHD and .5 part water.
  • the third column shows a concentration of 2 parts CA-2 and 1 part each per hundred of solvent of EHD and water. It is clear that the turbidity varies with time and also that the order of effectiveness, is 2 parts, 1 part, and 1/2 part, respectively.
  • Chart 8 compares the turbidity of supernatants in a control sample and three other specimens after 15 minutes and after 24 hours.
  • the first column is the control and the second column represents the control treated with 0.2 pph of CA-1 and 2 pph of water.
  • the third column shows a combination of the control treated with 0.2 pph of CA-1 and 2 parts each of EHD.
  • the last column shows the control treated with 0.2 parts CA-1 and 2 parts each of EHD and water. This last composition, the one in column 4, is clearly the most effective.
  • the 0.2 parts of CA-1 combined with EHD in the absence of water is not as effective in the long run as is the control, CA-1 and some water.
  • each of the clarifying additives includes its own diluent, the character and extent of which varies depending on the exact nature of the clarifying additive.
  • the compositions are referred to as from 50 to 75% "active" ingredients, meaning that the sulfonic acids, resins, etc. are present in 50 to 70% of the additive composition. Some ingredients are present in much smaller proportions of the additives as a whole.
  • a clarifying additive may be present in very small proportions.
  • the effective portion of a clarifying additive comprises only 10 or 20% of the entire weight of such additive, then, when an amount such as 0.1 parts per hundred (pph) of additive is used on an overall basis, the actual concentration would be 10 times less.
  • 0.1 pph equals 1,000 ppm
  • benefit could be obtained at levels of 100 ppm and less.
  • the present invention provides a highly advantageous manner of extending the life of washing solvent by a novel action of concentrating the solvent in a lower layer and leaving the supernatant layer of improved quality.
  • a very unusual and advantageous aspect of the present invention is that even after creating the ability to cause the solvent to separate into separate layers, one of which is very clear, the active ingredient nevertheless appears to be partitioned in large measure into the supernatant layer.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (17)

  1. Procédé pour fournir une sédimentation accélérée et améliorée de contaminants finement dispersés s'accumulant par l'emploi dans un solvant de lavage de pièces, ledit solvant de lavage de pièces ne comprenant pas plus de 20 pour cent de solvant aromatique et la balance en solvants aliphatiques et autres et en lesdits contaminants, ledit solvant de lavage de pièces ayant un point d'éclair d'au moins 37,8°C (100°F); ledit procédé comprenant traiter ledit solvant de lavage de pièces avec une composition d'addition pour fournir l'agglomération et la sédimentation des particules de contaminants créant une turbidité dans le solvant de lavage de pièces, ladite composition d'addition comprenant au moins un composé sélectionné à partir de la classe consistant en acides aromatiques, aliphatiques et alcaryle sulfoniques et en sels d'acide sulfonique, et en résines formaldéhyde alkyle phénol modifiées de manière à inclure des groupes de solubilisation alcoxy formant une partie de celle-ci, et des mélanges desdits acides ou sels d'acide et desdites résines, ledit solvant traité étant ainsi capable d'être réutilisé pour laver des pièces, ladite composition d'addition étant ajoutée au solvant de lavage de pièces selon une quantité afin de fournir de 0,01 partie à 5 parties dudit au moins un composé pour 100 parties de tout solvant présent après le traitement.
  2. Procédé tel que revendiqué dans la revendication 1, dans lequel lesdits groupes de solubilisation alcoxy sont des groupes de solubilisation propoxy.
  3. Procédé tel que revendiqué dans la revendication 1, dans lequel lesdits groupes de solubilisation alcoxy sont des groupes de solubilisation éthoxy.
  4. Procédé tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel lesdites résines formaldéhyde alkyle phénol incluent des groupes alkyle C3-C13 sur le groupe phénol desdites résines formaldéhyde phénol.
  5. Procédé tel que revendiqué dans la revendication 4, dans lequel lesdits groupes C3-C13 comprennent des groupes butyliques.
  6. Procédé tel que revendiqué dans la revendication 4, dans lequel lesdits groupes C3-C13 comprennent des groupes nonyliques.
  7. Procédé tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel ledit solvant de lavage de pièces comprend au moins 98% d'hydrocarbures aliphatiques.
  8. Procédé tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel ledit solvant de lavage de pièces a un point d'éclair d'au moins 60°C (140°F).
  9. Procédé tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel le solvant de lavage de pièces comprend en outre un ou plusieurs composés pour favoriser la sédimentation ou la formation d'une interface incluant des alcools C8-10, des diols, des glycols, des polyols et/ou des éthers glycoliques.
  10. Procédé tel que revendiqué dans la revendication 9, dans lequel l'un ou les plusieurs composés incluent le 2-éthyle-1,3-hexanediol, l'éther mono-butylique de diéthylène-glycol et/ou l'éther butylique.
  11. Procédé tel que revendiqué dans l'une quelconque des revendications précédentes, dans lequel la composition d'addition inclut des polyols estérifiés et/ou un diluant.
  12. Composition de solvant de lavage de pièces à base d'alcools dénaturés, ladite composition comprenant essentiellement des hydrocarbures aliphatiques et pas plus de 15 pour cent de solvants aromatiques, ladite composition ayant une composition d'addition dispersée dans celle-ci adaptée pour accélérer la sédimentation de particules dispersées, ladite composition d'addition comprenant un acide alkyle sulfonique et un mélange de résines alkyle inférieur formaldéhyde phénol alcoxylées, dans lesquelles ledit substituant alkyle inférieur est un substituant alkyle ayant de 4 à 11 atomes de carbone, l'acide alkyle sulfonique et le mélange de résines étant présents selon une quantité combinée de 0,01 jusqu'à 5,0 parties pour 100 parties de solvant.
  13. Composition telle que revendiquée dans la revendication 12, dans laquelle lesdites résines comprennent des résines formaldhéhyde butyle phénol alcoxylées et des résines formaldéhyde nonyle phénol alcoxylées.
  14. Composition telle que revendiquée dans la revendication 12 ou 13, dans laquelle ladite composition d'addition est sélectionnée à partir de la classe consistant en résines formaldéhyde nonyle phénol éthoxylées, en résines formaldéhyde nonyle phénol propoxylées, en résines formaldéhyde butyle phénol éthoxylées et en résines formaldéhyde butyle phénol propoxylées, ledit acide alkyle sulfonique ayant un groupe alkyle de 4 à 20 atomes de carbone.
  15. Composition telle que revendiquée dans l'une quelconque des revendications 12 à 14, dans laquelle le solvant de lavage de pièces est tel que défini dans l'une quelconque des revendications 7 à 10.
  16. Procédé de nettoyage de pièces utilisant un solvant de lavage de pièces, ledit procédé incluant les étapes consistant à nettoyer des pièces avec une masse de solvant de lavage de pièces ayant un point d'éclair supérieur à 37,8°C (100°F) et ne comprenant pas plus de 20% de solvants aromatiques et le reste en solvants aliphatiques et autres jusqu'à ce que ledit solvant subisse un clarté visuelle réduite et atteigne une concentration de particules en suspension de plus de 500 ppm, et traiter ensuite ledit solvant par un procédé tel que défini dans l'une quelconque des revendications 1 à 11.
  17. Procédé tel que revendiqué dans la revendication 16 qui inclut en outre les étapes consistant à nettoyer de nouveau des pièces jusqu'à l'apparition d'une clarté visuelle réduite et de traiter de nouveau ledit solvant par un procédé tel que revendiqué dans l'une quelconque des revendications 1 à 11.
EP95925520A 1994-07-07 1995-07-06 Compositions et procedes de traitement d'un solvant de nettoyage Expired - Lifetime EP0717789B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US27119094A 1994-07-07 1994-07-07
US271190 1994-07-07
PCT/US1995/008462 WO1996001915A1 (fr) 1994-07-07 1995-07-06 Compositions et procedes de traitement d'un solvant de nettoyage

Publications (3)

Publication Number Publication Date
EP0717789A1 EP0717789A1 (fr) 1996-06-26
EP0717789A4 EP0717789A4 (fr) 1997-01-08
EP0717789B1 true EP0717789B1 (fr) 1999-09-22

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ID=23034571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95925520A Expired - Lifetime EP0717789B1 (fr) 1994-07-07 1995-07-06 Compositions et procedes de traitement d'un solvant de nettoyage

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EP (1) EP0717789B1 (fr)
AT (1) ATE184922T1 (fr)
AU (1) AU2962595A (fr)
CA (1) CA2170364C (fr)
DE (1) DE69512361D1 (fr)
WO (1) WO1996001915A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602215A1 (de) * 1986-01-25 1987-07-30 Hoechst Ag Photopolymerisierbares gemisch und dieses enthaltendes photopolymerisierbares aufzeichnungsmaterial
US6004434A (en) * 1994-07-07 1999-12-21 Safety-Kleen Corp. Method of recycling cleaning solvent
AU2963095A (en) * 1994-07-07 1996-02-09 Safety-Kleen Corp. Enhanced solvent composition

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193499A (en) * 1961-10-03 1965-07-06 Phillips Petroleum Co Solvent and method for removing waxy deposits
US4407707A (en) * 1981-08-24 1983-10-04 Exxon Research And Engineering Co. Process for dedusting solids-containing hydrocarbon oils
JPH02248500A (ja) * 1989-03-22 1990-10-04 Daikin Ind Ltd 洗浄剤組成物および洗浄方法
EP0412475B1 (fr) * 1989-08-07 1993-11-10 E.I. Du Pont De Nemours And Company Composition de nettoyage à base d'un ester dibasique et un solvant hydrocarboné et procédé de nettoyage
AU8103091A (en) * 1990-06-11 1992-01-07 Martin Marietta Corporation Cycloparaffins containing cleaning composition and method of using them
US5196136A (en) * 1991-06-20 1993-03-23 E. I. Du Pont De Nemours And Company Cleaning composition of hydrocarbon component, surfactant and multibasic ester additive
US5207838A (en) * 1991-08-29 1993-05-04 Martin Marietta Energy Systems, Inc. Nonhazardous solvent composition and method for cleaning metal surfaces

Also Published As

Publication number Publication date
EP0717789A1 (fr) 1996-06-26
DE69512361D1 (de) 1999-10-28
ATE184922T1 (de) 1999-10-15
CA2170364A1 (fr) 1996-01-25
CA2170364C (fr) 1999-12-07
AU2962595A (en) 1996-02-09
WO1996001915A1 (fr) 1996-01-25
EP0717789A4 (fr) 1997-01-08

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