DE419064C - Process for arsenic removal from roast gases - Google Patents

Process for arsenic removal from roast gases

Info

Publication number
DE419064C
DE419064C DEA43386D DEA0043386D DE419064C DE 419064 C DE419064 C DE 419064C DE A43386 D DEA43386 D DE A43386D DE A0043386 D DEA0043386 D DE A0043386D DE 419064 C DE419064 C DE 419064C
Authority
DE
Germany
Prior art keywords
sulfuric acid
arsenic removal
gases
roast
roast 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
DEA43386D
Other languages
German (de)
Inventor
Dr Franz Vorlaender
Dr Hermann 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.)
Agfa Gevaert NV
Original Assignee
Aktiengesellschaft fuer Anilinfabrikation 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 Aktiengesellschaft fuer Anilinfabrikation GmbH filed Critical Aktiengesellschaft fuer Anilinfabrikation GmbH
Priority to DEA43386D priority Critical patent/DE419064C/en
Application granted granted Critical
Publication of DE419064C publication Critical patent/DE419064C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/48—Sulfur dioxide; Sulfurous acid
    • C01B17/50—Preparation of sulfur dioxide
    • C01B17/56—Separation; Purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Cleaning Or Drying Semiconductors (AREA)

Description

Verfahren zur Entarsenierung von Röstgasen. Bei dem Schwefelsäurekontaktverfahren «-erden die Röstgase zur Entfernung der noch in ihnen enthaltenen Arsenverbindungen bei Temperaturen unter ioo° C, gegebenenfalls unter gleichzeitiger Berieselung mit ver-(lünnter Schwefelsäure, durch ein elektrisches Hochspannungsfeld geleitet. Für die Stromzuführungs- und Aufhängevorrichtung der Sprühdrähte hat sich dabei die Verwendung von Blei seiner guten Säurefestigkeit wegen notwendig gemacht. Da dieses Metall der inneren Ausrüstung der Kammer nicht die für eine genaue Innehaltung der richtigen Abstände - zwischen Sprühdrähten und Niederschlagsblechen notwendige Starrheit zu verleihen vermag, bedient man sich homogen verbleiter Eisengerippe.Process for arsenic removal from roasting gases. In the sulfuric acid contact method «- earth the roasting gases to remove the arsenic compounds they still contain at temperatures below 100 ° C, possibly with simultaneous sprinkling with dilute sulfuric acid, passed through a high-voltage electric field. For the power supply and suspension device for the spray wires has the The use of lead was made necessary because of its good acid resistance. Since this Metal of the internal equipment of the chamber not necessary for an accurate pause of the correct distances - necessary rigidity between spray wires and precipitation plates able to lend, one uses homogeneously leaded iron frameworks.

Die Erfahrung hat nun gezeigt, daß die homogene Verbleiung auch bei sorgfältigster Ausführung nur von begrenzter Haltbarkeit ist, wenn sie ständig der Einwirkung verdünnter Säure und elektrischer Entladung ausgesetzt wird. Sobald nun durch Beschädigung der Bleischicht das Eisen mit dünner Schwefelsäure bei Gegenwart von Arsenverbindung zusammentritt, kommt es zur Bildung von Arsenwasserstoff, der das gefürchtetste Kontaktgift darstellt. Der Wert einer Entarsenierungsanlage wird dadurch vollkommen in Frage gestellt.Experience has now shown that the homogeneous lead also with Careful execution is only of limited durability if it is constantly the Dilute acid and electrical discharge. As soon as now by damaging the lead layer the iron with thin sulfuric acid in the presence of arsenic compound comes together, it comes to the formation of arsine, which represents the most feared contact poison. The value of an arsenic removal plant becomes thereby completely called into question.

Man kann nun, wie gefunden wurde, die Bildung von Arsenwasserstoff mit Sicherheit verhindern, wenn man statt des Eisens für die Bildung des Gerippes ein Material verwendet, Glas mit Schwefelsäure keinen Wasserstoff entwickelt. Als solches kommen z. B. Kupfer und Hartholz in Frage; das letztgenannte kann an gewissen Teilen sogar unverbleibt angewendet werden.One can now, as has been found, the formation of arsine prevent with certainty, if instead of the iron for the formation of the skeleton a material used, glass containing sulfuric acid does not evolve hydrogen. as such come z. B. Copper and hardwood in question; the latter can be due to certain Split can even be applied unused.

Das Verfahren der Entarsenierung von Röstgasen erfährt durch die neue Verbesserung eine bisher nicht erzielte Sicherheit der Durchführung und stellt damit einen bedeutenden Fortschritt im Schwefelsäurekontaktverfahren dar.The process of dearsening of roasting gases learns through the new Improvement of a previously unachievable security of the implementation and thus provides represents a significant advance in the sulfuric acid contact process.

Claims (1)

PATEN T-ANSPRUCI3: Verfahren zur Entarsenierung von Röstgasen durch Behandlung im elektrischen Hochspannungsfeld, gegebenenfalls unter gleichzeitiger Berieselung mit dünner Schwefelsäure, dadurch gekennzeichnet, daß man für die inneren Teile der Gasreinigungskammer solche Stoffe in verbleitem oder unverbleitem Zustande verwendet, die mit Schwefelsäure keinen Wasserstoff entwickeln.PATEN T-ANSPRUCI3: Process for dearsenation of roasting gases by Treatment in a high-voltage electrical field, possibly with simultaneous treatment Sprinkling with thin sulfuric acid, characterized in that one for the inner Parts of the gas cleaning chamber contain such substances in leaded or unleaded condition which do not develop hydrogen with sulfuric acid.
DEA43386D 1924-11-01 1924-11-01 Process for arsenic removal from roast gases Expired DE419064C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA43386D DE419064C (en) 1924-11-01 1924-11-01 Process for arsenic removal from roast gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA43386D DE419064C (en) 1924-11-01 1924-11-01 Process for arsenic removal from roast gases

Publications (1)

Publication Number Publication Date
DE419064C true DE419064C (en) 1925-09-19

Family

ID=6933617

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA43386D Expired DE419064C (en) 1924-11-01 1924-11-01 Process for arsenic removal from roast gases

Country Status (1)

Country Link
DE (1) DE419064C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740186C (en) * 1939-12-08 1943-10-26 Ig Farbenindustrie Ag Process for separating sulfuric acid from gases
DE1008259B (en) * 1954-08-17 1957-05-16 Metallgesellschaft Ag Precipitation electrode for electrostatic precipitator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740186C (en) * 1939-12-08 1943-10-26 Ig Farbenindustrie Ag Process for separating sulfuric acid from gases
DE1008259B (en) * 1954-08-17 1957-05-16 Metallgesellschaft Ag Precipitation electrode for electrostatic precipitator

Similar Documents

Publication Publication Date Title
DE419064C (en) Process for arsenic removal from roast gases
DE727096C (en) Liquid-cooled vacuum discharge apparatus, e.g. B. Mercury Vapor Rectifier
DE1044287B (en) Alloying process for the production of semiconductor devices with p-n junctions
DE740517C (en) Process for the heat treatment of austenitic materials in a tower furnace
DE600004C (en) Heat treatment process for malleable white cast iron
DE394119C (en) Process for removing arsenic from iron ores
DE879169C (en) Process for removing zinc from indium
AT155501B (en) Process for cleaning protective gas, in particular for bright annealing purposes.
DE593936C (en) Process for the production of coated glow cathodes
DE490248C (en) Process for the production of oxygen-containing organic compounds by catalytic reduction of carbon monoxide with hydrogen at elevated temperature and under high pressure
DE2361529A1 (en) PROCESS FOR PROTECTING COPPER SURFACES AGAINST CORROSION
DE701904C (en) Use of chromate melts as a deterrent in the patenting process for steel wires
DE432795C (en) Process for the condensation of zinc vapors exposed to the action of electrical currents
DE843754C (en) Process for the preparation of scrap metals
DE704096C (en) Procedure for gas analysis
DE908736C (en) Process for improving the initial permeability of iron-silicon alloys
DE972000C (en) Process for producing an electrically insulating and heat-resistant layer on metals and metal alloys
DE907008C (en) Process for the descaling of objects made of iron, steel, copper and copper alloys without damaging the metallic surface
DE1278802B (en) Process for the corrosion protection of the inner surfaces of pipes made of iron or iron alloys in high-temperature high-pressure vessels
DE1189054B (en) Method of purifying phosphorus
DE1080275B (en) Process for coating objects made of glass, quartz, ceramic materials or metal with metal oxide layers
DE366482C (en) Process for the extraction of solid metal from oxide-containing metal powder or metal sponge
DE633358C (en) Process for separating copper and bismuth
US1856731A (en) Purification of zinc solutions
DE589824C (en) Salt bath oven