DE1444950A1 - Process for removing sulfur compounds from gases - Google Patents

Process for removing sulfur compounds from gases

Info

Publication number
DE1444950A1
DE1444950A1 DE19631444950 DE1444950A DE1444950A1 DE 1444950 A1 DE1444950 A1 DE 1444950A1 DE 19631444950 DE19631444950 DE 19631444950 DE 1444950 A DE1444950 A DE 1444950A DE 1444950 A1 DE1444950 A1 DE 1444950A1
Authority
DE
Germany
Prior art keywords
sulfur
gases
washing solution
sulfur compounds
heated
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.)
Pending
Application number
DE19631444950
Other languages
German (de)
Inventor
Ludwig Dipl-Ing Juergen
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.)
Heinrich Koppers GmbH
Original Assignee
Heinrich Koppers 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 Heinrich Koppers GmbH filed Critical Heinrich Koppers GmbH
Publication of DE1444950A1 publication Critical patent/DE1444950A1/en
Pending 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
    • C10K1/10Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
    • C10K1/12Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00Sulfur; Compounds thereof
    • C01B17/02Preparation of sulfur; Purification
    • C01B17/04Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/05Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Industrial Gases (AREA)

Description

Verfahren zur Entfernung von Schwefelverbindungen aus Gasen Zusatz zu Patent . .(Patentanm,K 47 894 IVc/12e) Gegenstand des Haptpatentes ist die Entfernung von Schwefelverbindungen aus Gasen durch Waschung des Gases mit einer Lösung einer Chelatkomplexverbindung, deren koordinativ gebundenes, mehrwertiges Metallion durch die Schwefelverbindung unter Bildung elementaren Schwefels reduziert und durch freien Sauerstoff wieder oxydiert wird. Process for removing sulfur compounds from gases Additive to patent. . (Patentanm, K 47 894 IVc / 12e) The subject of the Haptpatent is the removal of sulfur compounds from gases by washing the gas with a solution of a Chelate complex compound, whose coordinatively bound, polyvalent metal ion through the sulfur compound is reduced to form elemental sulfur and replaced by free Oxygen is oxidized again.

Ein besonders typischer Vertreter einer für diesen Zweck geeigneten Eisenchelatkomplexverbindung ist ein Komplex, der sich aus der Umsetzung des Tetranatriumsalzes der Äthylendiaminotetraessigsäure mit Esen(II)-suliat in Gegenwart von freier Schwefelsäure ergibt.A particularly typical representative of one suitable for this purpose Iron chelate complex compound is a complex that results from the reaction of the tetrasodium salt of ethylenediaminotetraacetic acid with esen (II) suliate in the presence of free sulfuric acid results.

In dem Hauptpatent ist vorgesehen, daß die Abtrennung des in der umlaufenden Waschlösung enthaltenen suspendierten Schwefels aus der zuvor eingedickten Lösung mittels einer Filterpresse erfolgt. Diese Abtrennung des suspendierten Schwefels ist an sich technisch bei anderen Entschwefelungs verfahren erprobt0 Ein wesentliches Problem bei dieser Art der Schwefelabtrennung besteht darin, daß der abgepreßte Schwefel noch anhaftende Waschlösung enthält, die durch eine Nachwäsche entfernt werden muß. Das bei dieser Nachwäsche des abgepreßten Schwefels anfallende Wasser enthält die mit dem abgepreßten Schwefel aus dem Verfahren herausgeführte Ohelatkomplexverbindung in großer Verdünnung.In the main patent it is provided that the separation of the circulating Wash solution contained suspended sulfur from the previously thickened solution takes place by means of a filter press. This separation of the suspended sulfur has been technically tested in other desulphurisation processes0 An essential one The problem with this type of sulfur separation is that the squeezed off Sulfur still contains adhering washing solution, which is caused by a Rewash must be removed. The resulting from this rewashing of the squeezed out sulfur Water contains the sulfur removed from the process with the squeezed out sulfur Carbonate complex compound in great dilution.

Entweder muß man dieses Wasser verwerfen, was oft wegen der damit verbundenen Abwasserprobleme schwierig ist, oder aber man muB die sehr.verdtinnte Lösung aufkonzentriefen, so daß sie wieder zur Waschung von weiteren Gasmengen verwendet werden kannO Die vorliegende Erfindung hat eine Verbesserung der Schwefelabtrennung zum Gegenstand. Es wurde nämlich festgestellt, daß insbesondere Eisenchelatkomplexe sehr temperaturbeständig sind und sich auch bei stundenlangem Erhitzen auf Temperaturen von beträchtlich Über 1000 a nicht in mefibarem Umfang zersetzen Die Erfindung besteht darin, daß die den ein suspendierten Schwefel sowie den Eisenchelatkomplex in oxydierter Form enthaltende Waschlösung unter Druck auf Temperaturen oberhalb des Schwefelschmelzpunktes erhitzt, der geschmolzene Schwefel von der wässrigen Lösung aus einem Scheidebehälter flüssig abgetrennt und die wässrige Lösung nach Kühlung zur Behandlung neuer Gasmengen zurückgeführt wird, Der geschmolsene und flÜssig abgezogene Schwefel fÜhrt keinerlei Eisenchelatkomplex-Anteile mit eich, so daß die Abtrennung des Schwefels durch eine Druck-Wärme-Behandlung der Waschlösung ohne Verluste von wirksamem Komplex vor sich gehtO Um den Wäraeaufwand für die Erhitzung der angereicherten Waschlösung zwecks Ausschmelzen des Schwefels möglichst gering zu halten, wird gemäß einem weiteren Kennzeichen der Erfindung aus der den fein suspendierten Schwefel enthaltenden Waschlösung zunächst durch Eindicken eine Suspension höheren Schwefelgehaltes gewonnen und letztere der Druck-WErme-Behandlung unterzogen.Either you have to discard this water, which is often because of it associated wastewater problems is difficult, or you have to do the very diluted Concentrate the solution so that it can be used again for washing further quantities of gas The present invention has an improvement in sulfur separation to the subject. It was found that in particular iron chelate complexes are very temperature-resistant and even after hours of heating to temperatures of considerably more than 1000 a do not decompose to a measurable extent. The invention exists in that the one suspended sulfur and the iron chelate complex in oxidized Form-containing washing solution under pressure to temperatures above the melting point of sulfur heated, the molten sulfur from the aqueous solution from a separator separated in liquid form and the aqueous solution after cooling for the treatment of new amounts of gas is returned, the molten and liquid withdrawn sulfur does not lead any Iron chelate complex shares with calibration, so that the separation of the sulfur by a Pressure-heat treatment of the washing solution without loss of effective complex in front of it goesO About the heat required to heat the enriched washing solution in order to keep the sulfur melted out as low as possible, according to another Characteristics of the invention from the washing solution containing the finely suspended sulfur initially a suspension with a higher sulfur content is obtained by thickening and the latter subjected to the pressure-heat treatment.

Die Erhitzung der Waschlösung auf Schmelztemperatur des Schwefels kann in einem Autoklaven diskontinuierlich oder in einem Durchlauferhitzer mit nachfolgendem Scheidebehälter kontinuferlmch durchgeführt werden,The heating of the washing solution to the melting temperature of sulfur can be discontinuous in an autoclave or in a flow heater with subsequent Separating containers can be carried out continuously,

Claims (2)

Pat entans prÜ ohe 1. Verfahren zur Entfernung von Schwefelverbindungen aus Gasen gemäß Patent ................. (Patentanmeldung K 47 894 IVc/l2e), dadurch gekennzeiohnet, daß die den fein suspendierten Schwefel sowie den Eisenchelatkomplex in oxydierter Form enthaltende Waschlösung unter Druck auf Temperaturen oberhalb des schwefelschmelzpunktes erhitzt, der geschmllzene Schwefel von der wässrigen Lösung aus einem Scheidebehälter flüssig abgetrennt und die wässrige Lösung nach Kühlung zur Behandlung neuer Gasmengen zurückgeführt wird. Patents examine 1. Process for removing sulfur compounds from gases according to patent ................. (patent application K 47 894 IVc / l2e), thereby gekennzeiohnet that the finely suspended sulfur and the iron chelate complex washing solution containing in oxidized form under pressure to temperatures above the sulfur melting point is heated, the molten sulfur is heated by the aqueous Liquid separated from a separating container and the aqueous solution after Cooling is returned to the treatment of new amounts of gas. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß aus der den fein suspendierten Schwefel enthaltenden Waschlösung zunächst durch Eindicken eine' Suspension höheren Schwefelgehaltes gewonnen und letztere der Druck-Wärme-Behandlung unterzogen wird.2. The method according to claim 1, characterized in that from the the washing solution containing finely suspended sulfur first by thickening a suspension with a higher sulfur content is obtained and the latter is subjected to the pressure-heat treatment is subjected.
DE19631444950 1963-06-20 1963-06-20 Process for removing sulfur compounds from gases Pending DE1444950A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0050009 1963-06-20

Publications (1)

Publication Number Publication Date
DE1444950A1 true DE1444950A1 (en) 1968-11-14

Family

ID=7225450

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19631444950 Pending DE1444950A1 (en) 1963-06-20 1963-06-20 Process for removing sulfur compounds from gases

Country Status (1)

Country Link
DE (1) DE1444950A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819130A1 (en) * 1977-05-02 1978-11-09 Dowa Mining Co Hydrogen sulphide removal from gases - with a soln. contg. sulphuric acid, copper sulphate and ferric sulphate; and recovery of molten sulphur
DE2900515A1 (en) * 1979-01-08 1980-07-17 Steag Ag Coal gasification plant - recycling wash water for gas purification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819130A1 (en) * 1977-05-02 1978-11-09 Dowa Mining Co Hydrogen sulphide removal from gases - with a soln. contg. sulphuric acid, copper sulphate and ferric sulphate; and recovery of molten sulphur
DE2900515A1 (en) * 1979-01-08 1980-07-17 Steag Ag Coal gasification plant - recycling wash water for gas purification

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Legal Events

Date Code Title Description
SH Request for examination between 03.10.1968 and 22.04.1971