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DE4135578A1 - Splitting spent emulsions - Google Patents

Splitting spent emulsions

Info

Publication number
DE4135578A1
DE4135578A1 DE4135578A DE4135578A DE4135578A1 DE 4135578 A1 DE4135578 A1 DE 4135578A1 DE 4135578 A DE4135578 A DE 4135578A DE 4135578 A DE4135578 A DE 4135578A DE 4135578 A1 DE4135578 A1 DE 4135578A1
Authority
DE
Germany
Prior art keywords
splitting
carbon dioxide
emulsion
emulsions
water
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.)
Ceased
Application number
DE4135578A
Other languages
German (de)
Inventor
Des Erfinders Auf Nennung Verzicht
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.)
Synthesechemie Dr Penth 6600 Saarbruecken De GmbH
Original Assignee
Synthesechemie Dr Penth 6600 Saarbruecken De GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE4028904A external-priority patent/DE4028904C1/en
Application filed by Synthesechemie Dr Penth 6600 Saarbruecken De GmbH filed Critical Synthesechemie Dr Penth 6600 Saarbruecken De GmbH
Priority to DE4135578A priority Critical patent/DE4135578A1/en
Priority to AU11606/92A priority patent/AU1160692A/en
Priority to CA002100677A priority patent/CA2100677A1/en
Priority to PCT/EP1992/000056 priority patent/WO1992013051A1/en
Priority to EP92902310A priority patent/EP0569385A1/en
Priority to US08/087,740 priority patent/US5435920A/en
Priority to JP4502468A priority patent/JPH06504306A/en
Publication of DE4135578A1 publication Critical patent/DE4135578A1/en
Ceased legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/04Working-up used lubricants to recover useful products ; Cleaning aqueous emulsion based
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D17/00Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02Separation of non-miscible liquids
    • B01D17/04Breaking emulsions
    • B01D17/042Breaking emulsions by changing the temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D17/00Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02Separation of non-miscible liquids
    • B01D17/04Breaking emulsions
    • B01D17/047Breaking emulsions with separation aids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

Splitting of spent emulsions such as cooling lubricants comprises either saturating an emulsion, consisting of auxiliary aids, oil, water and an anionic emulsifier or an emulsifier combination of anionic and non-ionic surfactants, with carbon dioxide under pressure or reacting with carbonic acid-contg. water and then heating and/or cooling to form an org. and an aq. phase.

Description

Es wird ein Verfahren zum Waschen öliger oder fettiger Teile beschrieben, wobei die Teile zunächst mit einem Reinigungsmittel auf wäßriger Basis gewaschen werden. Das Reinigungsmittel ist erfindungsgemäß von vorneherein derart konzipiert, daß die bei der Reinigung entstehende Emulsion aus Reinigungsmittel, Öl oder Fett und Wasser mit Kohlendioxid leicht gespalten werden kann. Dabei wird unter leichter Spaltbarkeit verstanden, daß die mit Kohlendioxid unter Druck gesättigte Emulsion bis zur Phasentrennung nur wenig oder überhaupt nicht erhitzt werden muß. Die aufsteigende organische Phase wird abgestimmt oder über einen Ölabscheider abgetrennt. Die Wasserphase wird mit frischem Reinigungsmittel nachgeschärft und wiederverwendet. Als Reinigungsmittel werden anionische Tenside, wie Carboxylate, Sulfate oder Sulfonate oder Metallhydroxide, bzw. Kombinationen hieraus eingesetzt.It becomes a process for washing oily or greasy parts described, the parts first with a detergent be washed on an aqueous basis. The detergent is invented from the outset in such a way that the at The resulting emulsion of detergent, oil or fat and water can easily be split with carbon dioxide. Here is understood by easy cleavage that the with Carbon dioxide under pressure saturated emulsion up to Phase separation needs little or no heating. The ascending organic phase is coordinated or via a Oil separator separated. The water phase becomes fresh Cleaning agents sharpened and reused. As Cleaning agents are anionic surfactants, such as carboxylates, Sulfates or sulfonates or metal hydroxides, or combinations used from here.

Bei der heute gebräuchlichen Teilewaschanlagen werden die entstehenden ölhaltigen Waschlaugen entweder als Sondermüll entsorgt oder nach den bekannten Methoden der Emulsionsspaltung aufgearbeitet. Die diesbezüglich entstehenden Nachteile sind in der Patentanmeldung P 40 28 904.4 beschrieben. Weiterhin ist in der erwähnten Anmeldung das Verfahren beschrieben, solche Emulsionen mittels Kohlendioxid und Wärme zu spalten. Verbesserungswürdig bei diesem Verfahren ist das für manche Emulsionen notwendige starke Erhitzen auf manchmal über 100°C. Darüberhinaus wäre es grundsätzlich vorteilhaft, die Spaltung bei möglichst niedriger Temperatur durchzuführen.With the parts washing systems in use today, the resulting oil-containing wash liquors either as hazardous waste disposed of or according to the known methods of emulsion splitting worked up. The disadvantages arising in this regard are in the patent application P 40 28 904.4 described. Furthermore, in the mentioned application described the method, such Splitting emulsions using carbon dioxide and heat. For some, this method needs improvement Emulsions require vigorous heating to sometimes over 100 ° C. In addition, it would be fundamentally advantageous to include the split temperature as low as possible.

Zum Erreichen dieses Zieles wird erfindungsgemäß vorgeschlagen, die zu spaltende Emulsion, auf leichte Spaltbarkeit hin optimiert, dadurch herzustellen, daß der als Emulgator wirkende Reiniger so ausgewählt wird, daß die mit dem Öl oder Fett entstehende Emulsion möglichst geringe Stabilität gegenüber einer Spaltung mit Kohlendioxid und Wärme besitzt. Durch Wärme allein sollte diese Emulsion dabei nicht spaltbar sein, da die Waschprozesse selbst günstigerweise bei erhöhter Temperatur betrieben werden. Als Reinigungsmittel werden anionische Tenside, wie Carboxylate, Sulfonate, Sulfate, Metallhydroxide oder Kombinationen hieraus eingesetzt. Nichtionische oder kationische Tenside sind in der Regel wenig geeignet.To achieve this goal, the invention proposes the emulsion to be split, optimized for easy cleavage, in that the cleaner acting as an emulsifier is selected that the resulting emulsion with the oil or fat as little stability as possible with a cleavage Possesses carbon dioxide and heat. This should be done by heat alone Emulsion cannot be cleaved because the washing processes themselves conveniently operated at elevated temperature. As Cleaning agents are anionic surfactants, such as carboxylates, Sulfonates, sulfates, metal hydroxides or combinations thereof used. Nonionic or cationic surfactants are in the Usually not very suitable.

Die bei der Spaltung anfallende Spaltwasserphase kann erfindungsgemäß mit Reinigungsmittel nachgeschärft werden und als Reinigungsmittel wiederverwendet werden. Einer Aufsalzung dieser im Kreislauf geführten Wasserphase kann dadurch begegnet werden, daß in dem als Ionenpaar vorliegenden Reinigungsmittel das Kation so gewählt wird, daß bei der Behandlung mit Kohlendioxid ein schwerlösliches Carbonat gebildet wird (z. B. Calcium bildet mit Kohlendioxid Calciumcarbonat). Dieses aus der im Kreislauf geführten Spaltwasserphase ausfallende Carbonat kann zusammen mit der aufschwimmenden Ölphase oder durch Abfiltrieren kontinuierlich entfernt werden.The split water phase resulting from the split can according to the invention with cleaning agents and as Detergents can be reused. Salting this up circulating water phase can be countered by that in the detergent present as ion pair the cation is chosen so that a treatment with carbon dioxide poorly soluble carbonate is formed (e.g. calcium also forms Carbon dioxide calcium carbonate). This from the cycle precipitated carbonate precipitating carbonate together with the floating oil phase or by filtering continuously be removed.

Claims (1)

Verfahren zum Waschen öliger oder fettiger Teile gekennzeichnet dadurch, daß als Reinigungsmittel einer Teilewaschanlage vorzugsweise das Calciumsalz eines anionischen Tensids, wie Carboxylat, Sulfat oder Sulfonat oder Calciumhydroxid oder Kombinationen hieraus eingesetzt werden, diese nach Aufnahme der abzureinigenden Öle oder Fette mit Kohlendioxid unter Druck gesättigt und durch Wärmezufuhr gespalten werden.A process for washing oily or greasy parts, characterized in that the calcium salt of an anionic surfactant, such as carboxylate, sulfate or sulfonate or calcium hydroxide or combinations thereof, is preferably used as the cleaning agent of a parts washing system, these are saturated with carbon dioxide under pressure after the absorption of the oils or fats to be cleaned and be split by the supply of heat.
DE4135578A 1990-09-12 1991-10-29 Splitting spent emulsions Ceased DE4135578A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE4135578A DE4135578A1 (en) 1990-09-12 1991-10-29 Splitting spent emulsions
AU11606/92A AU1160692A (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like
CA002100677A CA2100677A1 (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like
PCT/EP1992/000056 WO1992013051A1 (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like
EP92902310A EP0569385A1 (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like
US08/087,740 US5435920A (en) 1991-01-15 1992-01-14 Method of separating emulsions
JP4502468A JPH06504306A (en) 1991-01-15 1992-01-14 How to separate emulsions etc.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4028904A DE4028904C1 (en) 1990-09-12 1990-09-12 Dissociating used coolant or lubricant - comprises saturating with carbon di:oxide under pressure to separate organic and aq. phase
DE4135578A DE4135578A1 (en) 1990-09-12 1991-10-29 Splitting spent emulsions

Publications (1)

Publication Number Publication Date
DE4135578A1 true DE4135578A1 (en) 1993-05-06

Family

ID=25896800

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4135578A Ceased DE4135578A1 (en) 1990-09-12 1991-10-29 Splitting spent emulsions

Country Status (1)

Country Link
DE (1) DE4135578A1 (en)

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