DE401794C - Removal of higher boiling hydrocarbons, such as naphthalene and others, from distillation gases - Google Patents

Removal of higher boiling hydrocarbons, such as naphthalene and others, from distillation gases

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Publication number
DE401794C
DE401794C DEG57615D DEG0057615D DE401794C DE 401794 C DE401794 C DE 401794C DE G57615 D DEG57615 D DE G57615D DE G0057615 D DEG0057615 D DE G0057615D DE 401794 C DE401794 C DE 401794C
Authority
DE
Germany
Prior art keywords
naphthalene
picric acid
boiling hydrocarbons
higher boiling
distillation gases
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
DEG57615D
Other languages
German (de)
Inventor
Dr Eugen Moellney
Dr Josef Weber
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.)
Evonik Operations GmbH
Original Assignee
TH Goldschmidt AG
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 TH Goldschmidt AG filed Critical TH Goldschmidt AG
Priority to DEG57615D priority Critical patent/DE401794C/en
Application granted granted Critical
Publication of DE401794C publication Critical patent/DE401794C/en
Expired legal-status Critical Current

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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
    • C10K1/10Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
    • C10K1/102Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids containing free acid

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  • 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Beseitigung von höher siedenden Kohlenwasserstoffen, wie Naphthalin und anderen, aus Destillationsgasen. Der Gehalt an höher siedenden Kohlenwasserstoffen, insbesondere an Naphthalin, macht sich bei Destillationsgasen häufig störend bemerkbar, das gilt besonders dann, wenn man gewisse Bestandteile der Destillationsgase durch Adsorption vermittels Stoffen großer Oberfläche, z. B. aktiver Kohle, aus den Gasen entfernen will. In diesem Fall wird die adsorptive Oberflächenwirkung des Adsorptionsmittels schon durch ganz geringe Mengen der höher siedenden Kohlenwasserstoffe beeinträchtigt, so daß sich bald Ermüdungserscheinungen des Adsorptionsmittels zeigen.Elimination of higher boiling hydrocarbons such as naphthalene and others, from distillation gases. The content of higher boiling hydrocarbons, especially naphthalene, is often noticeable in distillation gases, This is especially true if you have certain components of the distillation gases through Adsorption by means of substances with a large surface, e.g. B. active coal, from the gases want to remove. In this case, the surface adsorptive effect of the adsorbent becomes already affected by very small amounts of the higher-boiling hydrocarbons, so that the adsorbent will soon show signs of fatigue.

Im Hinblick auf die nachteilige Wirkung des Naphthalins im Leucht- und Heizgas, die sich darin äußert, daß die Rohrleitungen verstopft werden, hat man bereits vorgeschlagen, das Gas einem besonderen Reinigungsprozeß zu unterwerfen, indem man es der Einwirkung besonderer Reinigungsmittel, besonders der Pikrinsäure, unterwarf, wobei sich die Pikrinsäure mit dem Naphthalin umsetzt.With regard to the adverse effect of naphthalene in lighting and heating gas, which manifests itself in the fact that the pipes are clogged has it has already been proposed to subject the gas to a special cleaning process, by exposing it to the action of special detergents, especially picric acid, subjected, whereby the picric acid reacts with the naphthalene.

Man ist dabei in der Weise vorgegangen, daß man Sägespäne mit einer konzentrierten alkoholischen Pikrinsäurelösung durchtränkte und den Alkohol wieder abdestillierte, bis die Masse völlig trocken war, so daß man ein festes und dabei nicht explosibles Pikrinsäurepräparat erhielt.The procedure was that one sawdust with a concentrated alcoholic picric acid solution and soaked the alcohol again distilled off until the mass was completely dry, so that you get a solid and at the same time received a non-explosive picric acid preparation.

Dieser Weg zur Herstellung eines für den Zweck der Naphthalinabscheidung geeigneten Präparates ist indessen umständlich. Vorliegende Erfindung bezweckt eine Vereinfachung dieses bekannten Verfahrens der Gasreini;ung vermittels Pikrinsäure und erreicht den Zweck dadurch, daß die Pikrinsäure nicht als Trockenpräparat zur Anwendung gebracht wird, sondern in Form einer wäßrigen Suspension, welche mit dem Trockenpräparat die Eigenschaft teilt, daß sie absolut unexplosibel ist, dabei aber keine Umstände bei der Herstellung bereitet.This way of making one for the purpose of naphthalene deposition suitable preparation is cumbersome. The present invention aims at one Simplification of this known process of gas purification by means of picric acid and achieves the purpose in that the picric acid is not used as a dry preparation Application is brought, but in the form of an aqueous suspension, which with the Dry preparation shares the property that it is absolutely non-explosive, but at the same time does not cause any inconvenience in the production.

Die Anwendung der Pikrinsäure im Zustande einer wäßrigen Suspension gestattet auch eine bequeme Rückgewinnung aus dem Umsetzungsprodukt mit Naphthalin und sonstigen höher siedenden Kohlenwasserstoffen unter gleichzeitiger Gewinnung der Kohlenwasserstoff e. Die Hindurchleitung der zu reinigenden Gase durch die Pikrinsäuresuspension esfolgt zweckmäßig nach der üblichen Teerabscheidung und Ammoniakwäsche.The use of picric acid in the form of an aqueous suspension also allows convenient recovery from the reaction product with naphthalene and other higher-boiling hydrocarbons with simultaneous recovery the hydrocarbon e. The passage of the gases to be purified through the picric acid suspension it is expediently carried out after the usual tar separation and ammonia washing.

Sobald die Pikrinsäure enthaltende Reinigungsflüssigkeit infolge Erschöpfung an Pikrinsäure und Bildung von Pikrinsäure-Kohlenwasserstoffen-Additionsverbindungen in ihrer Wirkung nachläßt, wird die erschöpfte Flüssigkeit mit Alkali- oder Erdalkalioxyd, -hydroxyd oder -karbonat, wie z. B. Kalk oder Soda, in der Wärme behandelt. Dabei wird die Additionsverbindung aufgespalten, und die Pikrinsäure geht als Alkali- oder Erdalkali-Pikrat in Lösung, während sich der Kohlenwasserstoff, beispielsweise das Naphthalin, quantitativ abscheidet; der wertvolle Kohlenwasserstoff kann durch Filtration gewonnen werden. Die wäßrige Alkali- oder Erdalkali-Pikratlösung wird mit einer dem Alkali oder Erdalkali äquivalenten Menge solcher Säure, z. B. Salzsäure, versetzt, die mit dem Alkali oder Erdalkali eine lösliche Verbindung eingeht. Dabei scheidet sich die Pikrinsäure in dem wäßrigen Medium ab, und es entsteht wieder die wäßrige Pikrinsäuresuspension, die unbeschadet ihres Gehaltes an gelöstem Alkali- oder Erdalkalisalz, z. B. Natrium- oder Kalziumchlorid, erneut zur Auswaschung der in den Destillationsgasen enthaltenen, höher siedenden- Kohlenwasserstoffe verwendet werden kann.As soon as the cleaning fluid containing picric acid as a result of exhaustion of picric acid and formation of picric acid-hydrocarbon addition compounds diminishes in its effect, the exhausted liquid with alkali or alkaline earth oxide, hydroxide or carbonate, such as. B. lime or soda, treated in the heat. Included the addition compound is split, and the picric acid goes as an alkali or alkaline earth picrate in solution while the hydrocarbon, for example the naphthalene, quantitative separates; the valuable hydrocarbon can be obtained by filtration. The aqueous alkali or alkaline earth picrate solution is with an alkali or alkaline earth equivalent amount of such acid, for. B. Hydrochloric acid, mixed with the alkali or alkaline earth a soluble compound comes in. The picric acid separates out in the aqueous medium and is formed again the aqueous picric acid suspension, without prejudice to its dissolved content Alkali or alkaline earth salt, e.g. B. sodium or calcium chloride, again for leaching the higher-boiling hydrocarbons contained in the distillation gases are used can be.

Claims (2)

PATENT-ANSPRÜcIiE: i. Verfahren zur quantitativen Beseitigung von höher siedenden Kohlenwasserstoffen, z. B. von Napbthalin, aus Destillationsgasen durch Behandlung des Gases mit Pikrinsäure, dadurch gekennzeichnet, daß man die Pikrinsäure in Form einer wäßrigen Suspension zur Anwendung bringt. PATENT CLAIMS: i. Procedure for the quantitative elimination of higher boiling hydrocarbons, e.g. B. from Napbthalin, from distillation gases by treating the gas with picric acid, characterized in that the Bringing picric acid in the form of an aqueous suspension to use. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die durch Hindurchleiten des Gases durch die wäßrige Pikrinsäure - Suspension entstandene Kohlenwasserstoff-Pikrinsäureverbindung, z. B. die entsprechende Naphthalinverbindung, durch Behandlung mit Alkali- oder Erdalkalioxyden zerlegt und nach hierdurch bewirkter quantitativer Abscheidung des Kohlenwasserstoffes (Naphthalins) die Pikratlösung durch Ansäuren für die Wiederaufnahme von Kohlenwasserstoffen, insbesondere von Naphthalin, gebrauchsfähig gemacht wird.2. Procedure according to claim i, characterized in that by passing the gas Hydrocarbon-picric acid compound formed by the aqueous picric acid suspension, z. B. the corresponding naphthalene compound, by treatment with alkali or Erdalkalioxyden decomposed and after thereby effected quantitative deposition of the Hydrocarbons (naphthalene) the picrate solution by acidic for recovery of hydrocarbons, especially naphthalene, is made usable.
DEG57615D 1922-10-07 1922-10-07 Removal of higher boiling hydrocarbons, such as naphthalene and others, from distillation gases Expired DE401794C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG57615D DE401794C (en) 1922-10-07 1922-10-07 Removal of higher boiling hydrocarbons, such as naphthalene and others, from distillation gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG57615D DE401794C (en) 1922-10-07 1922-10-07 Removal of higher boiling hydrocarbons, such as naphthalene and others, from distillation gases

Publications (1)

Publication Number Publication Date
DE401794C true DE401794C (en) 1924-09-13

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DEG57615D Expired DE401794C (en) 1922-10-07 1922-10-07 Removal of higher boiling hydrocarbons, such as naphthalene and others, from distillation gases

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1078730B (en) * 1951-10-06 1960-03-31 Rosenblads Patenter Ab Process for cooling and scrubbing gas containing naphthalene
DE2921487A1 (en) * 1979-05-26 1980-11-27 Meissner Gmbh & Co Kg Josef METHOD FOR REMOVING VOLATILE AROMATIC COMPOUNDS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1078730B (en) * 1951-10-06 1960-03-31 Rosenblads Patenter Ab Process for cooling and scrubbing gas containing naphthalene
DE2921487A1 (en) * 1979-05-26 1980-11-27 Meissner Gmbh & Co Kg Josef METHOD FOR REMOVING VOLATILE AROMATIC COMPOUNDS

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