DE4133160A1 - Splitting spent emulsions - Google Patents

Splitting spent emulsions

Info

Publication number
DE4133160A1
DE4133160A1 DE4133160A DE4133160A DE4133160A1 DE 4133160 A1 DE4133160 A1 DE 4133160A1 DE 4133160 A DE4133160 A DE 4133160A DE 4133160 A DE4133160 A DE 4133160A DE 4133160 A1 DE4133160 A1 DE 4133160A1
Authority
DE
Germany
Prior art keywords
splitting
emulsion
emulsions
carbon dioxide
oil
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
DE4133160A
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.)
PENTH SYNTHESECHEMIE
Original Assignee
PENTH SYNTHESECHEMIE
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 PENTH SYNTHESECHEMIE filed Critical PENTH SYNTHESECHEMIE
Priority to DE4133160A priority Critical patent/DE4133160A1/en
Priority to CA002100677A priority patent/CA2100677A1/en
Priority to JP4502468A priority patent/JPH06504306A/en
Priority to EP92902310A priority patent/EP0569385A1/en
Priority to US08/087,740 priority patent/US5435920A/en
Priority to PCT/EP1992/000056 priority patent/WO1992013051A1/en
Priority to AU11606/92A priority patent/AU1160692A/en
Publication of DE4133160A1 publication Critical patent/DE4133160A1/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/04—Working-up used lubricants to recover useful products ; Cleaning aqueous emulsion based
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/042—Breaking emulsions by changing the temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/047—Breaking emulsions with separation aids

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 zur Spaltung von Öl in Wasser Emulsionen beschrieben. Das Verfahren zielt auf die Spaltung von Emulsionen, deren Stabilität eine Spaltung mittels Koaleszenzfilters und Adsorptionsmedium wie Aktivkohle nicht oder nur unvollständig zuläßt. Das erfindungsgemäße Verfahren bedient sich einer Vorbehandlung mittels Kohlendioxid zur Schwächung der Stabilität der Emulsion und anschließende Behandlung mittels Koaleszenzfilter und Adsorptionsmedium zu einer einleitfähigen Wasserphase.A process for the splitting of oil in water emulsions is described. The process aims at the splitting of emulsions, the stability of which Cleavage using a coalescence filter and adsorption medium such as activated carbon does not allow or only incompletely. The method according to the invention is used pretreatment with carbon dioxide to weaken stability the emulsion and subsequent treatment using a coalescence filter and Adsorption medium to form an introductory water phase.

Zur Aufbereitung bestimmter, nicht allzu stabiler Emulsionen, wie z. B. Druckluftkondensate, bieten einige Hersteller Geräte an, die in einer ersten Stufe freie Öle abtrennen, dann über einen Koaleszenzfilter geführt werden und schließlich mittels eines Adsorptionsmediums von den restlichen Ölanteilen befreit werden.For the preparation of certain, not too stable emulsions, such as. B. Compressed air condensates, some manufacturers offer devices that are in one Remove free oils in the first stage, then pass them through a coalescence filter and finally by means of an adsorption medium from the rest Oil shares are exempt.

In vielen Fällen reicht diese Anordnung für eine wirksame Öl-Wasser- Trennung jedoch nicht mehr aus, so daß Ölgehalte unter 20 ppm in der Wasserphase nicht realisiert werden können.In many cases this arrangement is sufficient for an effective oil-water However, separation no longer, so that oil contents below 20 ppm in the Water phase can not be realized.

Solcherart stabilisierte Emulsionen können demnach mit den oben beschriebenen Geräten nicht mehr wirksam aufgearbeitet werden. Da für kleine Emulsionsmengen, wie sie z. B. bei vielen Druckluftanlagen anfallen, aufwendige technische Lösungen, wie Ultrafiltration oder Chemikaliendosierungseinrichtungen nicht in Frage kommen, wurde eine technisch einfache und wirtschaftliche Lösung zur Aufbereitung dieser Emulsionen erarbeitet.Emulsions stabilized in this way can therefore be used with the above described devices can no longer be processed effectively. Therefore small amounts of emulsion, such as. B. in many compressed air systems, complex technical solutions such as ultrafiltration or Chemical dosing devices were not an option technically simple and economical solution for processing these Emulsions worked out.

Erreicht wurde das gesteckte Ziel durch Behandlung der zu spaltenden Emulsion mit Kohlendioxid, anschließende Behandlung mit einem Koaleszenzfilter und Nachbehandlung mit einem Adsorptionsmittel, wie Aktivkohle.The goal set was achieved by treating those to be split Emulsion with carbon dioxide, followed by treatment with a Coalescence filter and aftertreatment with an adsorbent, such as Activated carbon.

Im einzelnen wird die zu spaltende Emulsion zunächst bei einem Druck von vorzugsweise 1 bar (Atmosphärendruck) bis max ca. 6 Bar mit Kohlendioxid imprägniert. Danach wird die Emulsion über einen Leichtflüssigkeitsabscheider, einen Koaleszenzfilter und ein Adsorptionsmedium geführt.In detail, the emulsion to be split is first at a pressure of preferably 1 bar (atmospheric pressure) to max. approx. 6 bar with carbon dioxide impregnated. Then the emulsion is over a Light liquid separator, a coalescence filter and a Adsorption medium performed.

Gegenüber dem Verfahren ohne Kohlendioxid werden die Ölgehalte der entstehenden Wasserphase entscheidend herabgesetzt. Während die Behandlung der Emulsion mit Leichtflüssigkeitsabscheider, Koaleszenzfilter und Adsorptionsmittel Aktivkohle Restölgehalte in der Wasserphase weit über dem gesetzlichen Grenzwert für die Einleitfähigkeit hinterläßt, führt die Vorbehandlung mit Kohlendioxid zu Ölgehalten unterhalb den gesetzlichen Höchstwerten.Compared to the process without carbon dioxide, the oil content of the resulting water phase significantly reduced. During the treatment the emulsion with light liquid separator, coalescence filter and Adsorbent activated carbon Residual oil content in the water phase far above that leaves the legal limit for the discharge capability, leads the Pretreatment with carbon dioxide to oil levels below legal Maximum values.

Insgesamt handelt es sich um ein technisch einfaches Verfahren, das auch bei kleinen Mengen entsprechender Abwässer wirtschaftlich eingesetzt werden kann.Overall, it is a technically simple process that too can be used economically with small amounts of corresponding waste water can.

Claims (1)

Verfahren zur Spaltung von Öl in Wasser Emulsionen, gekennzeichnet dadurch, daß eine Emulsion, wie sie typischerweise als Druckluftkondensat anfällt, mit Kohlendioxid angesäuert und dadurch in ihrer Stabilität derart geschwächt wird, daß die nachfolgende Behandlung mittels Koaleszenzfilter und Adsorptionsmedium, z. B. Aktivkohle zu einer raschen und wirkungsvollen Emulsionsspaltung führt.Process for splitting oil in water emulsions, characterized in that that an emulsion, which is typically obtained as compressed air condensate, acidified with carbon dioxide and thus so stable is weakened that the subsequent treatment using a coalescence filter and adsorbent medium, e.g. B. activated carbon to a quick and effective Emulsion splitting leads.
DE4133160A 1990-09-12 1991-10-07 Splitting spent emulsions Ceased DE4133160A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE4133160A DE4133160A1 (en) 1990-09-12 1991-10-07 Splitting spent emulsions
CA002100677A CA2100677A1 (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like
JP4502468A JPH06504306A (en) 1991-01-15 1992-01-14 How to separate emulsions etc.
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
PCT/EP1992/000056 WO1992013051A1 (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like
AU11606/92A AU1160692A (en) 1991-01-15 1992-01-14 Process for cleaving emulsions or the like

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
DE4133160A DE4133160A1 (en) 1990-09-12 1991-10-07 Splitting spent emulsions

Publications (1)

Publication Number Publication Date
DE4133160A1 true DE4133160A1 (en) 1993-04-08

Family

ID=25896799

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4133160A Ceased DE4133160A1 (en) 1990-09-12 1991-10-07 Splitting spent emulsions

Country Status (1)

Country Link
DE (1) DE4133160A1 (en)

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