DE4139385A1 - Splitting spent emulsions - Google Patents

Splitting spent emulsions

Info

Publication number
DE4139385A1
DE4139385A1 DE4139385A DE4139385A DE4139385A1 DE 4139385 A1 DE4139385 A1 DE 4139385A1 DE 4139385 A DE4139385 A DE 4139385A DE 4139385 A DE4139385 A DE 4139385A DE 4139385 A1 DE4139385 A1 DE 4139385A1
Authority
DE
Germany
Prior art keywords
splitting
emulsions
water
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
DE4139385A
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 DE4139385A priority Critical patent/DE4139385A1/en
Priority to US08/087,740 priority patent/US5435920A/en
Priority to JP4502468A priority patent/JPH06504306A/en
Priority to EP92902310A priority patent/EP0569385A1/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
Publication of DE4139385A1 publication Critical patent/DE4139385A1/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

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)
  • Colloid Chemistry (AREA)
  • Lubricants (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 zur Spaltung von Öl in Wasser Emulsionen beschrieben. Eine Öl in Wasser Emulsion wird dabei zunächst bei Raumtemperatur mit Kohlendioxidgas unter Druck gesättigt und anschließend bis unter ihren Gefrierpunkt abgekühlt. Nach dem Auftauen des gefrorenen Materials erfolgt eine Phasentrennung der wäßrigen von der organischen Phase.It uses a process for splitting oil into water emulsions described. An oil in water emulsion is initially included Room temperature saturated with carbon dioxide gas under pressure and then cooled to below their freezing point. After this Thawing the frozen material results in a phase separation of the aqueous from the organic phase.

In der Patentanmeldung P 40 28 904.4 ist ein Verfahren zur Spaltung von Öl in Wasser Emulsionen beschrieben. Das Verfahren bedient sich der Spaltbarkeit von Emulsionen mittels Kohlendioxid und Erhitzen. Nachteilig bei diesem beschriebenen Verfahren ist die Tatsache, daß bei einigen Emulsionen bis zu einer Spaltung, also einer Trennung der Phasen eine Temperatur oberhalb 100°C erforderlich ist. Die Einhaltung der gebotenen Sicherheit gegenüber den dabei entstehenden Drücken kann gerade bei kleinen Anlagen problematisch bzw. unwirtschaftlich sein.In the patent application P 40 28 904.4 is a method for Splitting of oil in water emulsions are described. The procedure uses the splittability of emulsions using carbon dioxide and heating. The disadvantage of this described method is the fact that with some emulsions up to cleavage, a separation of the phases a temperature above 100 ° C. is required. Compliance with the required security compared to the resulting pressures, especially with small ones Plants can be problematic or uneconomical.

Dieses Problem wurde erfindungsgemäß dadurch gelöst, daß die Emulsion zunächst mit Kohlendioxid unter Druck gesättigt und anschließend unter ihren Gefrierpunkt abgekühlt wird. Während des darauffolgenden Auftauens erfolgt bei den meisten Öl in Wasser Emulsionen, wie z. B. Waschwässer aus der Teileentfettung, Kühlschmiermittel oder Druckluftkondensate dabei eine Trennung der beiden Phasen. Die Anwesenheit der Kohlensäure verhindert wirksam die Reemulgierung der beiden Phasen. Die in der Regel leichtere aufschwimmende, organische Phase kann mittels Ölabscheider, Skimmer oder ähnlichem abgetrennt werden.This problem was solved according to the invention in that the Emulsion first saturated with carbon dioxide under pressure and is then cooled below its freezing point. During the subsequent thawing occurs with most oil in water Emulsions such as B. wash water from part degreasing, Cooling lubricants or compressed air condensates separate the two phases. The presence of carbonic acid effectively prevents the re-emulsification of the two phases. The usually lighter floating organic phase can be separated by an oil separator, Skimmer or the like can be separated.

Vorteilhaft gegenüber dem in der oben erwähnten Patentanmeldung beschriebenen Verfahren ist der niedrigere Energieeinsatz unter der Voraussetzung, daß sich ein Wärmetauscher zur Wärmerückgewinnung für das obige Verfahren aufgrund der Anlagengröße nicht lohnt, oder aufgrund entsprechender Umgebungsbedingungen, z. B. Chargenbetrieb der Anlage entsprechend wechselnder niedriger Außentemperaturen im Freien.Advantageous over that in the above-mentioned patent application described method is the lower energy use under the requirement that a heat exchanger for Heat recovery for the above process due to the Plant size is not worth it, or due to corresponding Environmental conditions, e.g. B. Batch operation of the system accordingly changing low outside temperatures outdoors.

Das Verfahren kann auch kontinuierlich betrieben werden, indem das zu spaltende Material zunächst mit Kohlendioxid imprägniert, anschließend in einer kontinuierlich arbeitenden elektrischen Eiswürfelmaschine gefroren und danach mittels der Abwärme des Eiswürfelbereiters wieder aufgetaut wird.The process can also be operated continuously by the material to be split first impregnated with carbon dioxide, then in a continuously working electrical Frozen ice maker and then by means of the waste heat of the Ice maker is thawed again.

Claims (1)

Verfahren zur Spaltung von Öl in Wasser Emulsionen, gekennzeichnet dadurch, daß die Emulsion zunächst mit Kohlendioxid bei einem Druck von vorzugsweise 1-6 bar gesättigt, dann unter ihren Gefrierpunkt bis zum Erstarren abgekühlt und anschließend wieder aufgetaut wird.Process for splitting oil in water emulsions, characterized in that the emulsion is first saturated with carbon dioxide at a pressure of preferably 1-6 bar, then cooled to below its freezing point until solidification and then thawed again.
DE4139385A 1990-09-12 1991-10-29 Splitting spent emulsions Ceased DE4139385A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE4139385A DE4139385A1 (en) 1990-09-12 1991-10-29 Splitting spent emulsions
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.
EP92902310A EP0569385A1 (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
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

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
DE4139385A DE4139385A1 (en) 1990-09-12 1991-10-29 Splitting spent emulsions

Publications (1)

Publication Number Publication Date
DE4139385A1 true DE4139385A1 (en) 1993-05-06

Family

ID=25896801

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4139385A Ceased DE4139385A1 (en) 1990-09-12 1991-10-29 Splitting spent emulsions

Country Status (1)

Country Link
DE (1) DE4139385A1 (en)

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