DE640340C - Process for reducing the thickening of coal tar washes - Google Patents

Process for reducing the thickening of coal tar washes

Info

Publication number
DE640340C
DE640340C DEV28688D DEV0028688D DE640340C DE 640340 C DE640340 C DE 640340C DE V28688 D DEV28688 D DE V28688D DE V0028688 D DEV0028688 D DE V0028688D DE 640340 C DE640340 C DE 640340C
Authority
DE
Germany
Prior art keywords
coal tar
thickening
oil
reducing
phenols
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
Application number
DEV28688D
Other languages
German (de)
Inventor
Dr Joseph-Arnold Bordo
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.)
Kohle und Eisenforschung GmbH
Original Assignee
Kohle und Eisenforschung 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
Application filed by Kohle und Eisenforschung GmbH filed Critical Kohle und Eisenforschung GmbH
Priority to DEV28688D priority Critical patent/DE640340C/en
Application granted granted Critical
Publication of DE640340C publication Critical patent/DE640340C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10KPURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00Purifying combustible gases containing carbon monoxide
    • C10K1/08Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
    • C10K1/16Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
    • C10K1/18Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids hydrocarbon oils

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Working-Up Tar And Pitch (AREA)

Description

Verfahren zur Verminderung der Verdickung von Steinkohlenteerwaschölen Die im Kokereibetriehe zum Auswaschen des Benzols aus dem Rohgase benutzten Sbeinkohlenteeröle zeigten bereits nach kurzem Gebrauch eine erhebliche Zunahme der Viscosität !unter gleichzeitiger Abnahme der Waschfähigkeit. Durch diese- Verdickung des Waschöls wird schließlich die Aufnahmefähigkeit des Steinkohlentaeröls für Benzol so weit herabgesetzt, daß die Benzolwäsche umvirtschaftlich wird. Man ist daher schon nach kurzer Zeit gezwungen, einen Teil des ausgebrauchten Steinkohlenteeröls durch Frischöl zu versetzen.Process for reducing the thickening of coal tar wash oils The coal tar oils used in the coking plant to wash the benzene out of the raw gases showed a considerable increase in viscosity! under after only a short period of use simultaneous decrease in washability. Through this- thickening of the washing oil Finally, the absorption capacity of coal tar oil for benzene will be so high reduced that the benzene scrubbing is uneconomical. One is therefore already after For a short time it was forced to replace part of the used coal tar oil with fresh oil to move.

Zur Beseitigung des Übelstandes war bereits vorgeschlagen worden, das Steinkohlenteeröl mit Paraffinöl zu mischen; die Verdickung des Waschöls wird hierdurch zwar erheblich zurückgedrängt, doch haften dem Verfahren eine Reihe anderer Nachteile an. So muß z. B. die Regeneration solcher Mischöle getrennt von anderen Steinkohlenteerölen vorgenommen werden, da ein Paraffingehalt dieser öle unerwünscht ist. Weiterhin verursacht auch der Stockpunkt, der schon bei etwa - 4° C liegt, manche Schwierigkeiten.In order to remedy the problem it had already been suggested that to mix the coal tar oil with paraffin oil; the thickening of the wash oil becomes Although this is pushed back considerably by this, a number of others are liable to the process Disadvantages. So must z. B. the regeneration of such mixed oils separately from others Coal tar oils are made because a paraffin content of these oils is undesirable is. Furthermore, the pour point, which is already around - 4 ° C, also causes some difficulties.

Es wurde die überraschende Beobachtung gemacht, daß man die Verdickung des Waschöls erheblich hinauszögern kann, wenn man dem einen geringen Gehalt an P'henolen o. dgl. bereits aufweisenden Steinkohlenteeröl diese organischen Verbindungen, also die substituierten ebenso wie die nicht substituierten Phenole, Kresole und Naphthole, in kleiner Menge zusetzt, die äus ihm selbst gewonnen worden sind.The surprising observation was made that the thickening of the washing oil can be delayed considerably if one has a low content of Phenols or the like coal tar oil already containing these organic compounds, So the substituted as well as the unsubstituted phenols, cresols and Naphthols, added in small quantities, obtained from himself.

Normales Waschöl enthält zwar bereits 2 bis 5 % an diesen Stoffen, jedoch ist dieser Prozentgehalt nicht ausreichend, um die Verdickung des Waschöls erheblich zu vermindem. Erfindungsgemäß setzt man deshalb dem ursprünglichen Waschöl noch etwa 8 bis i o % an vorgenannten Stoffen .hinzu, so daß der Gehalt nunmehr etwa i o bis i 2 % beträgt.Normal washing oil already contains 2 to 5% of these substances, however, this percentage is insufficient to thicken the wash oil to be reduced considerably. According to the invention, therefore, the original washing oil is used still about 8 to 10% of the aforementioned substances .zu, so that the content now about i o to i is 2%.

Die im Steinkohlenteeröl durch Extraktion mittels Natronlauge erhaltenen sog. technischen Phenole vermindern die Verdickung des Steinkohlenteerwaschöls ganz erheblich. Dies ist rum so bedeutsamer, als vielfach die Anwesenheit dieser technischen Phenole im Waschöl bisher als eine der Hauptursachen der Waschölverdickungangesehen wurde. Daß diese Feststellung nicht zutrifft, geht aus folgendem Beispiel hervor Steinkohlenteeröl von 5,616o° absoluter Zähigkeit zeigte nach Durchgang von 35o cbm Rohgas eine Viscosität von 9;7484°. Das entspricht einer Zunahme der Zähigkeit um 41324°- Das gleiche Waschöl mit einer Zugab@e von 8 % technischen Phenolen, welches nunmehr eine Zähigkeit von 6,3587 aufwies, zeigte nach Durchgang der gleichen Literzahl Rohgäs eine Viscosität von 7452o°- Die Zunahme betrug hier nur 1,o'833°. Die Verminderung der Waschölverdickung kann noch gesteigert werden, wenn die technischen Phenole vor der Zugabe zum Waschöl zunächst destilliert und nur die über 23a°,, siedenden Anteile zum Steinkohlenteeröl hiI ' zugegeben werden.The so-called technical phenols obtained in coal tar oil by extraction with sodium hydroxide solution reduce the thickening of the coal tar washing oil quite considerably. This is all the more significant as the presence of these technical phenols in the washing oil was previously seen as one of the main causes of the washing oil thickening. The following example shows that this is not the case. Coal tar oil with an absolute viscosity of 5.616o ° showed a viscosity of 9.7484 ° after 35o cbm of raw gas had passed through. This corresponds to an increase in toughness by 41,324 ° - The same washing oil with an addition of 8% technical phenols, which now had a viscosity of 6.3587, showed a viscosity of 7452o ° after passing through the same number of liters of raw gas - the increase was here only 1, o'833 °. The reduction in the thickening of the washing oil can be increased if the technical phenols are first distilled before being added to the washing oil and only the portions boiling above 23 ° are added to the coal tar oil.

Claims (2)

PATE NTANSPRÜCHr: %#i r. Verfahren zur Verminderung der Verdickung von Steinkohlenteerwaschölen, dadurch gekennzeichnet, daß den Waschölen, die einen geringen Gehalt an Phenolen, Kresolen bzw. deren Substitutionsprodukten besitzen, aus SteinkohlenteerZlen gewonnene Phenole, Kresole, Naphthole bzw. deren Substitutionsprodukte zugesetzt werden. FATHER CLAIM:% # i r. Method of reducing thickening of coal tar washing oils, characterized in that the washing oils, the one have a low content of phenols, cresols or their substitution products, Phenols, cresols, naphthols and their substitution products obtained from coal tar can be added. 2. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß die genannten Substanzen vor der Zugabe destilliert und nur die über 23o° siedenden Anteile denn Waschöl zugefügt werden.2. The method according to claim r, characterized in that the The substances mentioned are distilled before the addition and only those boiling above 23o ° Proportions for washing oil are added.
DEV28688D 1932-09-30 1932-09-30 Process for reducing the thickening of coal tar washes Expired DE640340C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV28688D DE640340C (en) 1932-09-30 1932-09-30 Process for reducing the thickening of coal tar washes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV28688D DE640340C (en) 1932-09-30 1932-09-30 Process for reducing the thickening of coal tar washes

Publications (1)

Publication Number Publication Date
DE640340C true DE640340C (en) 1936-12-31

Family

ID=7584326

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV28688D Expired DE640340C (en) 1932-09-30 1932-09-30 Process for reducing the thickening of coal tar washes

Country Status (1)

Country Link
DE (1) DE640340C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945779C (en) * 1940-05-18 1956-07-19 Siemens Ag Test circuit for high voltage converters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945779C (en) * 1940-05-18 1956-07-19 Siemens Ag Test circuit for high voltage converters

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