DE394130C - Process for the production of Blanc-fixe - Google Patents
Process for the production of Blanc-fixeInfo
- Publication number
- DE394130C DE394130C DEM77571D DEM0077571D DE394130C DE 394130 C DE394130 C DE 394130C DE M77571 D DEM77571 D DE M77571D DE M0077571 D DEM0077571 D DE M0077571D DE 394130 C DE394130 C DE 394130C
- Authority
- DE
- Germany
- Prior art keywords
- fixe
- blanc
- production
- solution
- sulfur
- 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
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/462—Sulfates of Sr or Ba
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Verfahren zur Herstellung von Blanc-fixe. Die Bemühungen, Blanc-fixe aus Schwefelbariumlösung durch lösliche Sulfate zu erhalten, haben keinen befriedigenden Erfolg gehabt, weil das erhaltene Blanc-fixe immer freien Schwefel enthält, deshalb einen grauen Farbton besitzt und niit der Zeit leicht saure Reaktion annimmt, auch ist das Filtrieren und Auswaschen des Farbstoffes, besonders das Befreien von Natriumsulfid, schwierig und umständlich. Man hat zwar schon versucht, den grauen Farbton durch Nachbehandeln des von der sulfidhaltigen Lösung befreiten Farbstoffs mit Chlor zu beseitigen, aber auch bei diesem Verfahren besteht die Schwierigkeit des Auswaschens der Sulfidlösung, und es kommt das lästige Arbeiten mit Chlor hinzu. Demge-enüber gelangt man gemäß vorliegender Erfindung zu einem auch bei Gegen-wart von Eisen rein weißen und leicht auswaschbaren Blancfixe, indem .man Schwefelbariumlösung mit der äquivalenten Menge Magnesium- oder Alkalisulfatlösung vermischt, zu der Mischung Magnesium- oder Alkalisulfit gibt, schweflige Säure bis zum Eintritt saurer Reaktion einleitet, kocht und die nun Thiosulfat enthaltende Lösung durch Filtern und Auswaschen vom Farbstoff trennt.Process for the production of blanc-fixe. Efforts to Blanc-fixe Obtaining from sulphurous barium solution through soluble sulphates has no satisfactory result Successful because the blanc-fixe obtained always contains free sulfur, that's why has a gray hue and takes on a slightly acidic reaction over time, too is the filtering and washing out of the dye, especially the removal of sodium sulfide, difficult and awkward. You have already tried to get the gray shade through Post-treatment of the dyestuff freed from the sulfide-containing solution with chlorine eliminate, but even with this method there is the difficulty of washing out the sulphide solution, and there is also the annoyance of working with chlorine. On the other hand according to the present invention one arrives at one even in the presence of iron pure white and easily washable Blancfixe by adding sulfur barium solution mixed with the equivalent amount of magnesium or alkali metal sulfate solution, to the Mixture of magnesium or alkali sulphite gives sulphurous acid until it becomes more acidic Initiate reaction, boil and filter the solution now containing thiosulfate and leaching separates from the dye.
Beispiel. Einer Schwefelbariumlösung, hergestellt durch Auskochung von zoo kg Rohschwefelbarium (mit 77 Prozent Ba S) in goo 1 Wasser, gibt man bei einer Temperatur von 4o bis 5o° C unter Rühren eine M agnesiumsulfatlösung zu. Letztere ist hergestellt durch Auflösung von 18o kg Mg S04 7aqu in 8oo 1 Wasser. Unter weiterem Rühren und Innehalten der Temperatur von 4o bis 5o° C läßt man eine Lösung von 318 kg scli-,vefligsaurer Magnesia zufließen. Man leitet weiter schweflige Säure bis zum Eintritt schwachsaurer Reaktion ein, rührt, bis die eventuelle Verfärbung durch Schwefeleisen verschwunden ist und hält 1,!_. Stunde im Kochen.Example. A magnesium sulfate solution is added to a sulfur barium solution, prepared by boiling out zoo kg of raw sulfur barium (with 77 percent Ba S) in goo 1 water, at a temperature of 40 to 50 ° C. while stirring. The latter is produced by dissolving 180 kg of Mg S04 7aqu in 8oo 1 of water. With further stirring and maintaining the temperature of 40 to 50 ° C., a solution of 318 kg of scli-, vefligaurer magnesia is allowed to flow in. Sulphurous acid is passed in further until a weakly acidic reaction occurs, the mixture is stirred until the possible discoloration by sulfur iron has disappeared and it is kept at 1,! _. Hour in cooking.
Das fertige rein weiße Blanx-fixe wird, wie gewöhnlich, gefiltert und ausgewaschen. Das Filtrat wird auf Magnesiumthiosulfat oder ;\Tagnesiumsulfat und schweflige Säure verarbeitet, welch letztere von neuem in den Betrieb genommen werden.The finished, pure white Blanx-fixe is filtered as usual and washed out. The filtrate is based on magnesium thiosulphate or magnesium sulphate and sulphurous acid processed, the latter being put into operation again will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM77571D DE394130C (en) | 1922-04-29 | 1922-04-29 | Process for the production of Blanc-fixe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM77571D DE394130C (en) | 1922-04-29 | 1922-04-29 | Process for the production of Blanc-fixe |
Publications (1)
Publication Number | Publication Date |
---|---|
DE394130C true DE394130C (en) | 1924-04-12 |
Family
ID=7317749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM77571D Expired DE394130C (en) | 1922-04-29 | 1922-04-29 | Process for the production of Blanc-fixe |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE394130C (en) |
-
1922
- 1922-04-29 DE DEM77571D patent/DE394130C/en not_active Expired
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