DE207593C - - Google Patents
Info
- Publication number
- DE207593C DE207593C DE1907207593D DE207593DA DE207593C DE 207593 C DE207593 C DE 207593C DE 1907207593 D DE1907207593 D DE 1907207593D DE 207593D A DE207593D A DE 207593DA DE 207593 C DE207593 C DE 207593C
- Authority
- DE
- Germany
- Prior art keywords
- hydrosulfite
- ammonia
- hydrosulfites
- anhydrous
- water
- 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 - Lifetime
Links
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical class [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000002425 crystallisation Methods 0.000 claims 1
- 230000005712 crystallization Effects 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000006011 modification reaction Methods 0.000 claims 1
- JVBXVOWTABLYPX-UHFFFAOYSA-L Sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 235000012970 cakes Nutrition 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002335 preservative Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- -1 that of any other Chemical compound 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
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
- C01B17/64—Thiosulfates; Dithionites; Polythionates
- C01B17/66—Dithionites or hydrosulfites (S2O42-)
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
■'■■■' REICHSPATENTAMT ■ '■■■' REICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
- JYS 207593 KLASSE 12«?. GRUPPE 22..- JYS 207593 CLASS 12 «?. GROUP 22 ..
Zusatz zum Patente 200291 vom 16. November 1906.Addendum to patent 200291 of November 16, 1906.
Patentiert im Deutschen Reiche vom 6. November 1907 ab. Längste Dauer: !.April 1920.Patented in the German Empire on November 6, 1907. Longest duration:! April 1920.
In dem Patent .200291 ist ein Verfahren zur Darstellung von haltbaren wasserfreien Hydrosulfiten beschrieben, welches darin besteht, daß man Natriumhydrosulfit in Form von Hydratpreßkuchen und in Form von ' Lösungen kontinuierlich auf. eine über die Verdampfungstemperatur des Wassers erhitzte Heizfläche aufbringt und dabei durch kurzes Erhitzen das Wasser möglichst rasch zur Verdampfung bringt, und zwar ohne oder mit . Anwendung von vermindertem Druck.In the patent .200291 is a method for the preparation of durable anhydrous Hydrosulfites described, which consists in the fact that sodium hydrosulfite is in the form of hydrate press cake and in the form of 'solutions continuously. one over the Evaporation temperature of the water heated heating surface and thereby by short Heating causes the water to evaporate as quickly as possible, with or without . Use of reduced pressure.
Es wurde nun gefunden, daß es mit Leichtigkeit und ohne irgendwelche besonderen Vorsichtsmaßregeln und Apparaturen gelingt, das' wasserhaltige Hydrosulfit bzw. den, bei der Darstellung .des letzteren erhaltenen, durch Abpressen der Mutterlauge von dieser möglichst befreiten Kristallbrei in wasserfreies Hydrosulfit überzuführen, dadurch, daß manIt has now been found that it can be done with ease and without any special Precautions and apparatus succeed in the 'water-containing hydrosulfite or the, with the representation of the latter obtained by pressing the mother liquor from this as possible to convert freed crystal pulp into anhydrous hydrosulfite, by the fact that
ao denselben . bzw. die Hydrosulfitsalzlösungen unter Durchleiten eines Ammoniakstromes in einem gelinden Vakuum zur Trocknung abdampft. Die Entwässerung des Hydrosulfits verläuft demnach bei Gegenwart von Ammoniak wie die eines beliebigen anderen, nicht zersetzlichen' Salzes. : ao the same. or the hydrosulfite salt solutions evaporate to dryness while passing a stream of ammonia in a gentle vacuum. The dehydration of the hydrosulfite proceeds in the presence of ammonia like that of any other, non-decomposing 'salt. :
In dem amerikanischen Patent 861218 wird ein Verfahren zum Haltbarmachen von Hydro-■sulfiten beschrieben, das darin besteht, daß man HydrosulntlösUngcn unter Zusatz geringer ' Mengen von Salzen schwacher Säuren, wie Soda, Borax, Natrium phosphat usw., ein-35 In the American patent 861218 a process for the preservation of hydrosulfites described, which consists in the fact that one HydrosulntlösUngcn with the addition of less 'Amounts of weak acid salts, such as soda, borax, sodium phosphate, etc., a-35
dampft, wobei dann in der eingedampften Masse das darin enthaltene Salz der schwachen Säure das Hydrosulfit haltbar machen soll. Nebenbei wird dann in dem Patent erwähnt, daß man hierzu auch Ammoniak benutzen kann, obgleich doch Ammoniak beim Eindampfen der Lösung weggekocht wird und gar nicht mehr konservierend wirken könnte. Davon, daß Ammoniak das Hydrosulfit in den wasserfreien Zustand überführen kann, ist in der genannten Patentschrift nicht die Rede. Dies ist auch ganz unmöglich, denn nicht nur mit geringen Mengen Ammoniak, wie sie in dem genannten amerikanischen Patent ausdrücklich vorgeschrieben sind, sondern auch durch Zusatz eines großen Überschusses von wäßrigem Ammoniak zu der Hydrosulfitlösung und Eindampfen derselben ist es nicht möglieh, wasserfreies Hydrosulfit darzustellen. Die beim Eindampfen eintretende Zersetzung wird auch durch Zusatz eines großen Überschusses von Ammoniak nur ganz unwesentlich aufgehalten. Löst man z. B. 74prozentiges Natriumhydrosulfit in Wasser unter Zusatz einer der Hälfte des Wassers entsprechenden Menge konzentrierter Ammoniaklösung und dampft im Vakuum bei 53 ° ein, so geht der Gehalt an Natriumhydrosulfit auf etwa 3 Prozent zurück. Leitet man dagegen durch eine Lösung von 74prozentigem Natriumhydrosulfit in Wasser beim Eindampfen im Vakuum bei 530 einen sauerstoff freien Ammohiakstrom hindurch,evaporates, whereby the salt of the weak acid contained in the evaporated mass is supposed to make the hydrosulfite durable. In addition, the patent mentions that ammonia can also be used for this purpose, although ammonia is boiled away when the solution is evaporated and could no longer have a preservative effect. The aforementioned patent does not mention that ammonia can convert the hydrosulfite into the anhydrous state. This is also quite impossible, because not only with small amounts of ammonia, as expressly prescribed in the aforementioned American patent, but also by adding a large excess of aqueous ammonia to the hydrosulfite solution and evaporating it, it is not possible to produce anhydrous hydrosulfite. The decomposition that occurs during evaporation is only very insignificantly stopped by the addition of a large excess of ammonia. If you solve z. B. 74 percent sodium hydrosulfite in water with the addition of an amount of concentrated ammonia solution corresponding to half the water and evaporated in vacuo at 53 °, the sodium hydrosulfite content goes back to about 3 percent. On the other hand, if you pass an oxygen-free ammonia stream through a solution of 74% sodium hydrosulphite in water during evaporation in vacuo at 53 0,
5555
6060
so erhält man einen Rückstand, der ungefähr 50 Prozent Natriumhydrosulfit enthält.a residue is obtained which contains approximately 50 percent sodium hydrosulfite.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT42401D AT42401B (en) | 1907-11-05 | 1909-03-10 | Process for the preparation of durable anhydrous hydrosulfites. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE207593C true DE207593C (en) |
Family
ID=469679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1907207593D Expired - Lifetime DE207593C (en) | 1907-11-05 | 1907-11-05 |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE207593C (en) |
-
1907
- 1907-11-05 DE DE1907207593D patent/DE207593C/de not_active Expired - Lifetime
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