JPS54131594A - Purification of caustic soda - Google Patents
Purification of caustic sodaInfo
- Publication number
- JPS54131594A JPS54131594A JP3914278A JP3914278A JPS54131594A JP S54131594 A JPS54131594 A JP S54131594A JP 3914278 A JP3914278 A JP 3914278A JP 3914278 A JP3914278 A JP 3914278A JP S54131594 A JPS54131594 A JP S54131594A
- Authority
- JP
- Japan
- Prior art keywords
- naoh
- crystals
- slurry
- concentrator
- sent
- 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.)
- Pending
Links
Abstract
PURPOSE: To obtain high purity NaOH aqueous solution by purifying effectively a NaOH aqueous solution containing sodium chloride in particular by the procedure in which a slurry containing NaOH crystals obtained by cooling a NaOH aqueous solution is concentrated and then NaOH crystals are separated.
CONSTITUTION: The aqueous 32 to 55 wt % NaOH solution 8 in general, is sent to the crystallization process 9 to crystallize NaOH crystals by cooling, and then the slurry 10 containing the crystals is sent to the concentration process 11 where fine NaOH crystals and dilute slurry containing fine sodium chloride crystals are removed for concentration. And, the concentrated slurry 12 obtained from the concentrator 11-1 of the process 11 is sent to the separation process 13 where NaOH crystals are obtained by filtration and the filtrate 16 is drained. On the other hand, the concentrated slurry obtained from the concentrator 11-2 is recycled to the process 9, and also the dilute slurry 15 is taken out of each concentrator.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3914278A JPS54131594A (en) | 1978-04-05 | 1978-04-05 | Purification of caustic soda |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3914278A JPS54131594A (en) | 1978-04-05 | 1978-04-05 | Purification of caustic soda |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54131594A true JPS54131594A (en) | 1979-10-12 |
Family
ID=12544848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3914278A Pending JPS54131594A (en) | 1978-04-05 | 1978-04-05 | Purification of caustic soda |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54131594A (en) |
-
1978
- 1978-04-05 JP JP3914278A patent/JPS54131594A/en active Pending
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