DE352125C - Process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium - Google Patents

Process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium

Info

Publication number
DE352125C
DE352125C DE1920352125D DE352125DA DE352125C DE 352125 C DE352125 C DE 352125C DE 1920352125 D DE1920352125 D DE 1920352125D DE 352125D A DE352125D A DE 352125DA DE 352125 C DE352125 C DE 352125C
Authority
DE
Germany
Prior art keywords
sulphates
magnesium
production
sulphurous acid
alkaline earths
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
DE1920352125D
Other languages
German (de)
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.)
ZWEIGNIEDERLASSUNG MANNHEIM
Rhenania Verein Chemischer Fabriken AG
Original Assignee
ZWEIGNIEDERLASSUNG MANNHEIM
Rhenania Verein Chemischer Fabriken 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 ZWEIGNIEDERLASSUNG MANNHEIM, Rhenania Verein Chemischer Fabriken AG filed Critical ZWEIGNIEDERLASSUNG MANNHEIM
Application granted granted Critical
Publication of DE352125C publication Critical patent/DE352125C/en
Expired legal-status Critical Current

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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
    • C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
    • 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
    • C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
    • C01B17/506—Preparation of sulfur dioxide by reduction of sulfur compounds of calcium sulfates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Compounds Of Iron (AREA)
  • Gas Separation By Absorption (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

in Mannheim.in Mannheim.

und des Magnesiums.and magnesium.

Es ist bekannt, Sulfate der alkalischen Erden , und des Magnesiums zwecks Gewinnung von ' schwefliger Säure im Gemenge mit Sulfiden, insbesondere Schwermetallsulnden, als Reduktionsmittel zu erhitzen.It is known to use sulphates of the alkaline earths and of magnesium for the purpose of extracting ' Sulphurous acid mixed with sulphides, especially heavy metal sulphides, as a reducing agent to heat.

Es wurde nun gefunden, daß die Ausbeute des Verfahrens wesentlich dadurch erhöht wird, daß man Eisenoxyd oder eisenoxydhaltige Stoffe, z. B. Pyritabbrand oder abgerösteteIt has now been found that the yield of the process is significantly increased by that iron oxide or substances containing iron oxide, e.g. B. Pyritabbrand or roasted

ίο Gasreinigungsmasse, dem Gemenge zusetzt. Auch wird dadurch vermieden, daß bei Anwendung von beispielsweise Pyrit als Schwer- : metallsulfid Elementarschwefel schon abgegeben wird bei Temperaturen, bei denen eine Reaktion \ desselben auf Gips noch nicht nennenswert ; stattfindet, so daß sein Reduktionswert sich vermindert; denn das Eisenoxyd verwandelt den Schwefel bereits bei 550 ° in Schwefeldioxyd. Auch bei Anwendung anderer Suffide j oder sulfidhaltiger Stoffe, wie Gasreinigungs- ! masse, hat sich der Zusatz von Eisenoxyd ' bewährt. ;ίο Gas cleaning compound, added to the mixture. Also, it is avoided that upon application of, for example, pyrite as heavy: metal sulfide elemental sulfur is already delivered at temperatures at which a reaction \ thereof is not appreciably gypsum; takes place so that its reduction value decreases; for the iron oxide converts the sulfur into sulfur dioxide at 550 °. Even when using other suffids or substances containing sulphides, such as gas cleaning agents! mass, the addition of iron oxide has proven itself. ;

Es wurde zugleich festgestellt, daß als (molekulares) Verhältnis von z. B. Gips zur Menge Pyrit und Eisenoxyd bei Anwendung von Stoffen annähernd theoretischer Zusammensetzung und bei Temperaturen von 900 bis 950 ° ', erfahrungsgemäß zweckmäßig gewählt wird: ■ 4,4: ι: 2,25. Bei diesem Mengenverhältnis vonIt was also found that the (molecular) ratio of z. B. gypsum for the amount of pyrite and iron oxide when using substances of approximately theoretical composition and at temperatures of 900 to 950 ° ', experience has shown that it is expediently chosen: ■ 4.4: ι: 2.25. With this ratio of

do demnach 5 kg wasserfreiem Gips, 1 kg Pyrit i und 3 kg Eisenoxyd wurden bei 900 ° bereits ; 82 Prozent des Schwefels als Schwefeldioxyd, bei 950 ° gar 87 Prozent gewonnen, während : etwa 8 Prozent als Elementarschwefel entstand, j In Übereinstimmung mit der Bildung des Elementarschwefels ergibt sich auch die kleine Abweichung dieser Mengenverhältnisse von der unten angegebenen Gleichung. Bei wesentlich anderen Temperaturen und anderen Sulfaten ändert sich das Verhältnis von Gips zu Gesamteisen und kann je nach den Umständen vom Fachmann leicht festgestellt werden. Mit steigender Temperatur wird es beispielsweise kleiner als das obige (4:3) gewählt.do accordingly 5 kg anhydrous gypsum, 1 kg pyrite i and 3 kg of iron oxide were already at 900 °; 82 percent of the sulfur as sulfur dioxide, at 950 ° even 87 percent was obtained, while: about 8 percent was formed as elemental sulfur, j In accordance with the formation of elemental sulfur, the small one also results Deviation of these proportions from the equation given below. At essential other temperatures and other sulphates change the ratio of gypsum to total iron and can be easily ascertained by those skilled in the art depending on the circumstances. With As the temperature rises, it is selected to be smaller than the above (4: 3), for example.

Als Reaktipnsprodukt bildet sich dabei vermutlich nach der Zwischenbildung von Schwefeleisen ein Ferrit der Formel Ca3 Fe4 O9, woraus sich die angegebene Wirkung und das als günstig gefundene Mengenverhältnis auch theoretisch erklären würde nach der wahrscheinlichen Gleichung: A ferrite of the formula Ca 3 Fe 4 O 9 is presumably formed as a reaction product after the intermediate formation of sulfur iron, which would theoretically explain the specified effect and the quantitative ratio found to be favorable according to the probable equation:

5,5 Ca SO4 + Fe S2 + 3,2 Fe2 O3
= 1,8 Ca3 Fe4 O9+ 7,5 SO2.5.5 Ca SO 4 + Fe S 2 + 3.2 Fe 2 O 3
= 1.8 Ca 3 Fe 4 O 9 + 7.5 SO 2 .

Claims (2)

Patent-Ansprüche:Patent Claims: 1. Verfahren zur Herstellung von schwefliger Säure aus den Sulfaten der alkalischen Erden und des Magnesiums mit Hilfe von Schwermetallsulfiden, dadurch gekennzeichnet, daß dem Gemenge von Sulfat und Sulfid Eisenoxyd beigefügt wird,1. Process for the production of sulphurous acid from the sulphates of the alkaline Earth and magnesium with the help of heavy metal sulphides, characterized that iron oxide is added to the mixture of sulphate and sulphide, 2. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß das Eisenoxyd in einem solchen Gewichtsverhältnis angewendet wird, wie es zum annähernd quantitativen Umsatz geeignet ist.2. Embodiment of the method according to claim 1, characterized in that the iron oxide is used in such a weight ratio as is suitable for approximately quantitative conversion is.
DE1920352125D 1919-04-17 1920-04-15 Process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium Expired DE352125C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEV14668D DE386295C (en) 1919-04-17 1919-04-17 Process for the production of sulphurous acid
DEV14875D DE394362C (en) 1919-04-17 1919-08-09 Process for the production of sulfur dioxide from the sulphates of the alkaline earths, magnesium or iron
DEV15204D DE391603C (en) 1919-04-17 1920-01-06 Process for the production of sulphurous acid by heating sulphates of the alkaline earths
DE352125T 1920-04-15

Publications (1)

Publication Number Publication Date
DE352125C true DE352125C (en) 1922-04-21

Family

ID=40344694

Family Applications (6)

Application Number Title Priority Date Filing Date
DEV14668D Expired DE386295C (en) 1919-04-17 1919-04-17 Process for the production of sulphurous acid
DEV14875D Expired DE394362C (en) 1919-04-17 1919-08-09 Process for the production of sulfur dioxide from the sulphates of the alkaline earths, magnesium or iron
DEV14876D Expired DE391602C (en) 1919-04-17 1919-08-09 Process for the production of sulphurous acid by heating sulphates of the alkaline earths
DEV15204D Expired DE391603C (en) 1919-04-17 1920-01-06 Process for the production of sulphurous acid by heating sulphates of the alkaline earths
DE1920352125D Expired DE352125C (en) 1919-04-17 1920-04-15 Process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium
DER55913D Expired DE375872C (en) 1919-04-17 1922-05-16 Process for the regeneration of the iron oxide used in the process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium according to patent 352125

Family Applications Before (4)

Application Number Title Priority Date Filing Date
DEV14668D Expired DE386295C (en) 1919-04-17 1919-04-17 Process for the production of sulphurous acid
DEV14875D Expired DE394362C (en) 1919-04-17 1919-08-09 Process for the production of sulfur dioxide from the sulphates of the alkaline earths, magnesium or iron
DEV14876D Expired DE391602C (en) 1919-04-17 1919-08-09 Process for the production of sulphurous acid by heating sulphates of the alkaline earths
DEV15204D Expired DE391603C (en) 1919-04-17 1920-01-06 Process for the production of sulphurous acid by heating sulphates of the alkaline earths

Family Applications After (1)

Application Number Title Priority Date Filing Date
DER55913D Expired DE375872C (en) 1919-04-17 1922-05-16 Process for the regeneration of the iron oxide used in the process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium according to patent 352125

Country Status (3)

Country Link
DE (6) DE386295C (en)
FR (1) FR519787A (en)
GB (2) GB149662A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004568A1 (en) * 1978-04-02 1979-10-17 Abdel Fattah Dr. Sabry Hosein Kamel Process for recovering sulphuric acid from natural gypsum or phospho-gypsum

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424937A (en) * 1943-02-22 1947-07-29 United States Gypsum Co Incendiary composition
US2425740A (en) * 1943-07-28 1947-08-19 Smidth & Co As F L Reduction of sulphates
US2766102A (en) * 1948-12-23 1956-10-09 Exxon Research Engineering Co Production of sulfur dioxide
US2858191A (en) * 1950-08-08 1958-10-28 Basf Ag Production of gases rich in sulfur dioxide suitable for working up into sulfuric acid
US3729551A (en) * 1971-01-07 1973-04-24 Cons Coal Co Conversion of calcium sulfate to calcium oxide and elemental sulfur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004568A1 (en) * 1978-04-02 1979-10-17 Abdel Fattah Dr. Sabry Hosein Kamel Process for recovering sulphuric acid from natural gypsum or phospho-gypsum

Also Published As

Publication number Publication date
DE394362C (en) 1924-04-24
DE391603C (en) 1924-03-08
DE391602C (en) 1924-03-08
DE386295C (en) 1923-12-07
DE375872C (en) 1923-05-19
GB161581A (en) 1922-09-11
GB149662A (en) 1921-11-08
FR519787A (en) 1921-06-15

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