DE386295C - Process for the production of sulphurous acid - Google Patents
Process for the production of sulphurous acidInfo
- Publication number
- DE386295C DE386295C DEV14668D DEV0014668D DE386295C DE 386295 C DE386295 C DE 386295C DE V14668 D DEV14668 D DE V14668D DE V0014668 D DEV0014668 D DE V0014668D DE 386295 C DE386295 C DE 386295C
- Authority
- DE
- Germany
- Prior art keywords
- sulphurous acid
- production
- sulfur
- dehydrated
- 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)
- 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
Verfahren zur Erzeugung von schwefliger Säure. Da der Vorrat an deutschen Kiesen und Blenden bei weitem nicht dem bisherigen Bedarf an Schwefel bzw. schwefliger Säure und Schwefelsäure entspricht, so hat es nicht an Versuchen gefehlt, die in Form von Sulfaten, insbesondere von Gips vorhandenen sehr bedeutenden inländischen Schwefelvorkommen zu verwerten.Process for the production of sulphurous acid. Since the supply of German Gravel and diaphragms are nowhere near the previous need for sulfur or sulphurous Acid and sulfuric acid, so there has been no shortage of experiments in Form of sulphates, especially of gypsum, present very significant domestic Recycle sulfur deposits.
Man kann bei diesen Verfahren im wesentlichen zwei Gruppen unterscheiden 1. indirekte, welche die Sulfate zu Sulfiden reduzieren,-den Schwefel in Form von Schwefelwasserstoff verflüchtigen und ihn alsdann zu Schwefel oder schwefliger Säure verbrennen; 2. direkte, welche unmittelbar schweflige Säure oder Schwefelsäureanhydrid gewinnen wollen. Die letzteren Verfahren scheinen bisher im wesentlichen daran gescheitert zu sein, daß die in Betracht kommenden Zersetzungstemperaturen sehr hoch liegen. Dies gilt anscheinend auch für die Verfahren, welche wie das in der Patentschrift 2o7761 beschriebene, das Schwefelsäureanhydrid durch Kieselsäure austreiben.Essentially, two groups can be distinguished in these processes 1. Indirect, which reduce the sulphates to sulphides, -the sulfur in the form of Volatilize hydrogen sulfide and then turn it into sulfur or sulphurous acid burn; 2. direct, which is directly sulphurous acid or sulfuric anhydride want to win. The latter processes seem to have essentially failed because of this to be that the decomposition temperatures in question are very high. This apparently also applies to the methods such as that in the patent specification 2o7761, expel the sulfuric anhydride through silica.
Man hat weiter versucht (vgl. die Patentschrift 232784) den Schwefel des Gipses durch gleichzeitigen Zusatz von Kieselsäure und Schwefelkies zu verflüchtigen, in der Absicht, die beim Rösten des Kieses entstehende M ärme zum Austreiben der schwefligen Säure aus dem Gips zu benutzen. Auch dies Verfahren hat sich nicht einzuführen vermocht, weil offenbar die beim Röstprozeß des Kieses entwickelte V4 ärme zur Zersetzung von einigermaßen bedeutenden Mengen Gips nicht hinreicht. Es wurde nun gefunden, daß man den Schwefel der Sulfate der alkalischen Erden, insbesondere des Gipses, bei verhältnismäßig niederer Temperatur verflüchtigen kann, wenn man dem wasserfreien Sulfat metallisches Eisen oder andere durch Wasserstoff reduzierbare Metalle oder auch deren niedere Oxyde und außerdem erweichenden Stoffe, wie z. B. entwässertes Chlorcalcium, beigemischt und das Gemisch auf höhere Temperatur erhitzt.Further attempts have been made (cf. patent 232784) with sulfur to volatilize the gypsum by adding silica and pyrites at the same time, with the intention of using the arms produced during the roasting of the gravel to drive out the to use sulphurous acid from the plaster of paris. This procedure does not have to be introduced either was able to do so, because the V4 developed during the roasting process of the gravel was evidently poor in decomposition a fairly large amount of plaster of paris is not enough. It has now been found that the sulfur of the sulphates of the alkaline earths, especially of gypsum, can volatilize at a relatively low temperature if you use the anhydrous Sulphate metallic iron or other metals reducible by hydrogen or also their lower oxides and also softening substances, such as. B. dehydrated Calcium chloride, added and the mixture heated to a higher temperature.
Ausführungsbeispiel. Zoo Teile wasserfreier feingemahlener Gips werden mit 15o Teilen metallischem Eisen in Pulverform bei Gegenwart von 1o bis 15 Prozent entwässertem Chlorcalcium auf 85o bis 95o° erhitzt. Eer Schwefel verflüchtigt sich in Form von schwefliger Säure. An Stelle von Chlorcalcium können auch andere Erweichungsmittel, wie Chlormagnesium, Eisenborat und ähnliche Stoffe, Verwendung finden. Der Reaktionsrückstand kann nach Reduktion in Wasserstoff oder Wassergas von neuem Verwendung finden, wobei der entstandene Kalk je nach Bedarf vorher oder nachher, z. B. durch einen Schlemmprozeß, aus der Masse entfernt werden kann.Embodiment. Zoo parts can be made of anhydrous finely ground plaster of paris with 15o parts metallic iron in powder form in the presence of 10 to 15 percent dehydrated calcium chloride heated to 85o to 95o °. The sulfur evaporates in the form of sulphurous acid. Instead of calcium chloride, other emollients, such as chlorine magnesium, iron borate and similar substances are used. The reaction residue can be used again after reduction in hydrogen or water gas, whereby the resulting lime as required before or after, z. B. through a gluttony process, can be removed from the mass.
Claims (2)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV14668D DE386295C (en) | 1919-04-17 | 1919-04-17 | Process for the production of sulphurous acid |
DEV14876D DE391602C (en) | 1919-04-17 | 1919-08-09 | Process for the production of sulphurous acid by heating sulphates of the alkaline earths |
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 |
DE1920352125D DE352125C (en) | 1919-04-17 | 1920-04-15 | Process for the production of sulphurous acid from the sulphates of the alkaline earths and magnesium |
GB1970520A GB149662A (en) | 1919-04-17 | 1920-07-08 | Improved manufacture of sulphur dioxide by heating sulphates of alkaline earths magnesium and iron |
FR519787D FR519787A (en) | 1919-04-17 | 1920-07-08 | Improvements to automobile horns |
GB1048921A GB161581A (en) | 1919-04-17 | 1921-04-09 | A process for the manufacture of sulphurous acid |
DER55913D 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 |
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 |
---|---|
DE386295C true DE386295C (en) | 1923-12-07 |
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 After (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
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 FR FR519787D patent/FR519787A/en not_active Expired
- 1920-07-08 GB GB1970520A patent/GB149662A/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 |
DE391602C (en) | 1924-03-08 |
DE394362C (en) | 1924-04-24 |
DE391603C (en) | 1924-03-08 |
DE375872C (en) | 1923-05-19 |
DE352125C (en) | 1922-04-21 |
GB161581A (en) | 1922-09-11 |
FR519787A (en) | 1921-06-15 |
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