DE391602C - Process for the production of sulphurous acid by heating sulphates of the alkaline earths - Google Patents
Process for the production of sulphurous acid by heating sulphates of the alkaline earthsInfo
- Publication number
- DE391602C DE391602C DEV14876D DEV0014876D DE391602C DE 391602 C DE391602 C DE 391602C DE V14876 D DEV14876 D DE V14876D DE V0014876 D DEV0014876 D DE V0014876D DE 391602 C DE391602 C DE 391602C
- Authority
- DE
- Germany
- Prior art keywords
- sulphates
- production
- heating
- alkaline earths
- iron
- 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
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
- C01B17/501—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)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Treating Waste Gases (AREA)
- Compounds Of Iron (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Gas Separation By Absorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
Verfahren zur Erzeugung von schwefliger Säure durch Erhitzen von Sulfaten der alkalischen Erden. Nach dem Verfahren des Patents 386295 werden; die Sulfate der alkalischen Erden zwecks Erzeugung von schwefliger ,Säure mit durch Wasserstoff reduzierbaren Schwermetallen, besonders Eisen, oder deren niederen Oxyden in Gegenwart erweichender Flußmittel auf höhere Temperatur erhitzt. Die Ausbeute an Schwefel, welcher als Schwefeldioxyd dabei entweicht, wechselt aber j e nach den angewandten Mengen des Reduktionsmittels.Process for the production of sulphurous acid by heating sulphates of the alkaline earths. Following the procedure of the patent 386295 will be; the sulphates of the alkaline earths are heated to a higher temperature in the presence of softening fluxes in order to produce sulphurous acid with heavy metals reducible by hydrogen, especially iron, or their lower oxides. The yield of sulfur, which escapes as sulfur dioxide, changes depending on the amount of reducing agent used.
Es wurde nun gefunden, daß zweckmäßig die durch Wasserstoff reduzierbaren Metalle oder deren niedere Oxyde nur in Mengen Anwendung finden dürfen, welche zur Bildung des Sulfits der .alkalischen Erden ausreichend sind.It has now been found that those reducible by hydrogen are expedient Metals or their lower oxides may only be used in amounts that are used for Formation of the sulphite of the .alkaline earths are sufficient.
Auch Kohle kann teilweise als Reduktionsmittel die Metalle oder deren niedere Oxyde ersetzen.Coal can also be used as a reducing agent for the metals or their replace lower oxides.
Dabei ist es weiter als vorteilhaft erkannt worden, in Stickstoff oder sonstigen indifferenten Gasen oder im Vakuum den Vorgang vorzunehmen, um die Abspaltung von Schwefeldioxyd zu begiinstigen. Auch hat sich herausgestellt, daß in diesem Falleder Zusatz erweichender Flußmittel nicht von bestimmender Bedeutung mehr ist.It has also been recognized as advantageous in nitrogen or other inert gases or in a vacuum to carry out the process to the To favor the elimination of sulfur dioxide. It has also been found that in this case the addition of emollient fluxes is not of critical importance is more.
Das Verfahren eignet sich auch für die Erzeugung von Schwefeldioxyd aus Magnesiumsulfat oder Eisensulfat.The process is also suitable for the production of sulfur dioxide made of magnesium sulfate or iron sulfate.
Man kann schließlich auch so vorgehen, daß der Prozeß in zwei Stufen verläuft, indem man zunächst unter Luftabschluß die Redaktion bei niederer Temperatur bewirkt, sei es zwecks Darstellung der Sulfite der alkalischen Erden, sei es zu ihrer Weiterverarbeitung und dann für letzteren Zweck bei höherer Temperatur die Entwicklung von Schwefeldioxyd herbeiführt.Finally, one can also proceed in such a way that the process is divided into two stages is done by initially excluding the air from editing at a low temperature causes, be it for the purpose of representing the sulphites of the alkaline earth, be it for the purpose of their further processing and then for the latter purpose at a higher temperature Induces development of sulfur dioxide.
Der Rückstand kann, soweit er wertvolles Metall enthält, z. B. im Wassergasstrom reduziert und nach dem Abkühlen vom Talk befreit werden, um von neuem zur Reduktion zu dienen. Beispiele. r. 68 kg wasserfreies Gipsmehl werden mit 28 kg Eisenfeilspänen gemengt und unter L uftabschluß auf etwa goo° erhitzt, bis kein Schwefeldioxyd mehr entweicht.The residue can, as far as it contains valuable metal, z. B. in Reduced water gas flow and freed from talc after cooling to start again to serve for reduction. Examples. r. 68 kg of anhydrous gypsum flour are used at 28 kg iron filings mixed and heated to about goo ° with the air shut off until none More sulfur dioxide escapes.
2. I I7 kg Schwerspat werden mit 14 kg Eisenpulver mit 3 kg Anthrazit auf goo° erhitzt.2. I 17 kg of barite are mixed with 14 kg of iron powder with 3 kg of anthracite heated to goo °.
3. 6o kg wasserfreies Magnesiumsulfat werden mit 28 kg Eisenoxydul auf etwa goo° im Stickstoffstrom erhitzt, solange noch Schwefeldioxvd entweicht. d. 34 kg Gips «-erden mit 1d. kg Eisenfeile auf etwa 6oo° eine halbe Stunde erhitzt. Darauf wird das Ganze auf goo" gebracht, wobei die Schwefeldiosvdentwicklung vor sich geht.3. 60 kg of anhydrous magnesium sulfate are mixed with 28 kg of iron oxide heated to about goo ° in a stream of nitrogen as long as sulfur dioxide is still escaping. d. 34 kg of plaster of paris earth with 1d. kg iron file heated to about 600 ° for half an hour. Then the whole thing is brought to goo ", with the Schwefeldiosvdentwicklung in front is going.
Claims (4)
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 |
---|---|
DE391602C true DE391602C (en) | 1924-03-08 |
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 |
DEV14876D Expired DE391602C (en) | 1919-04-17 | 1919-08-09 | Process for the production of sulphurous acid by heating sulphates of the alkaline earths |
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 |
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 (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV14668D Expired DE386295C (en) | 1919-04-17 | 1919-04-17 | Process for the production of sulphurous acid |
Family Applications After (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
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 |
Country Status (3)
Country | Link |
---|---|
DE (6) | DE386295C (en) |
FR (1) | FR519787A (en) |
GB (2) | GB149662A (en) |
Families Citing this family (6)
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 |
ES478382A1 (en) * | 1978-04-02 | 1979-11-01 | Abdel Fattah Sabry Hosein Kame | Process for recovering sulphuric acid from natural gypsum or phospho-gypsum. |
-
1919
- 1919-04-17 DE DEV14668D patent/DE386295C/en not_active Expired
- 1919-08-09 DE DEV14876D patent/DE391602C/en not_active Expired
- 1919-08-09 DE DEV14875D patent/DE394362C/en not_active Expired
-
1920
- 1920-01-06 DE DEV15204D patent/DE391603C/en not_active Expired
- 1920-04-15 DE DE1920352125D patent/DE352125C/en not_active Expired
- 1920-07-08 GB GB1970520A patent/GB149662A/en not_active Expired
- 1920-07-08 FR FR519787D patent/FR519787A/en not_active Expired
-
1921
- 1921-04-09 GB GB1048921A patent/GB161581A/en not_active Expired
-
1922
- 1922-05-16 DE DER55913D patent/DE375872C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB149662A (en) | 1921-11-08 |
DE352125C (en) | 1922-04-21 |
GB161581A (en) | 1922-09-11 |
DE375872C (en) | 1923-05-19 |
DE391603C (en) | 1924-03-08 |
FR519787A (en) | 1921-06-15 |
DE394362C (en) | 1924-04-24 |
DE386295C (en) | 1923-12-07 |
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