AT34574B - Process for cleaning and clarifying the sodium hydroxide solution contaminated by the mercerization process. - Google Patents
Process for cleaning and clarifying the sodium hydroxide solution contaminated by the mercerization process.Info
- Publication number
- AT34574B AT34574B AT34574DA AT34574B AT 34574 B AT34574 B AT 34574B AT 34574D A AT34574D A AT 34574DA AT 34574 B AT34574 B AT 34574B
- Authority
- AT
- Austria
- Prior art keywords
- clarifying
- cleaning
- sodium hydroxide
- hydroxide solution
- mercerization
- Prior art date
Links
Description
<Desc/Clms Page number 1>
Verfahren zum Reinigen und Klären der durch den Mercerisationsprozess verunreinigten Natronlauge.
EMI1.1
<Desc/Clms Page number 2>
Beispiell. Für 1 m3 der oben beschriebenen Ablauge von 120 Be. werden eingesetzt : 100 kg Barythydrat, 100 kg Kalk und 30 kg kalzinierte Soda. Man erhitzt die Ablauge zum Kochen, trägt das vorher in heissem Wasser gelöste Barythydrat ein, dann nach einiger Zeit den vorher gelöschten Kalk, endlich die in heissem Wasser gelöste Soda und erhitzt, am besten zu gelindem Sieden, bis die Kaustifizierung vollendet ist. Sodann lässt man auf etwa 50-000 C abkühlen und filtriert.
Die erhaltenen Niederschläge, welche noch etwas Lauge enthalten, werden nochmals mit Wasser ausgezogen (dieses Wasser kann für die nächste Partie zum Auflösen z. B. der Soda benutzt werden) und können dann in einer der üblichen Weisen regeneriert werden, z. B. durch Glühen in einem Flammofen nach vorhergehendem Mischen mit Kohlenstaub und Trocknen.
Beispiel 2 : Ein beinahe gleich gutes Resultat wie bei der Ausführungsform nach Beispiel 1 erhält man, wenn man, wie oben arbeitend, 250 kg Kalk und dann nur 10 Ay Barythydrat einsetzt. In diesem Falle würde sich eine Regeneration der Presskuchen nicht lohnen.
<Desc / Clms Page number 1>
Process for cleaning and clarifying the sodium hydroxide solution contaminated by the mercerization process.
EMI1.1
<Desc / Clms Page number 2>
For example. For 1 m3 of the waste liquor of 120 Be described above. are used: 100 kg of baryta hydrate, 100 kg of lime and 30 kg of calcined soda. The waste liquor is heated to the boil, the barythydrate previously dissolved in hot water is added, then after some time the previously slaked lime, finally the soda dissolved in hot water and heated, preferably to a gentle boil, until causticization is complete. It is then allowed to cool to about 50-000 ° C. and filtered.
The precipitates obtained, which still contain some lye, are extracted again with water (this water can be used for the next batch to dissolve e.g. the soda) and can then be regenerated in one of the usual ways, e.g. B. by annealing in a flame furnace after prior mixing with coal dust and drying.
Example 2: A result that is almost as good as in the embodiment according to Example 1 is obtained if, working as above, 250 kg of lime and then only 10 Ay of barythydrate are used. In this case, it would not be worth regenerating the press cake.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT33979T | 1907-03-30 | ||
| AT34574T | 1907-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT34574B true AT34574B (en) | 1908-09-25 |
Family
ID=25599980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT34574D AT34574B (en) | 1907-03-30 | 1907-10-16 | Process for cleaning and clarifying the sodium hydroxide solution contaminated by the mercerization process. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT34574B (en) |
-
1907
- 1907-10-16 AT AT34574D patent/AT34574B/en active
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