JPS56142220A - Separation and purification of p-xylene - Google Patents
Separation and purification of p-xyleneInfo
- Publication number
- JPS56142220A JPS56142220A JP4731980A JP4731980A JPS56142220A JP S56142220 A JPS56142220 A JP S56142220A JP 4731980 A JP4731980 A JP 4731980A JP 4731980 A JP4731980 A JP 4731980A JP S56142220 A JPS56142220 A JP S56142220A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- xylene
- washing liquid
- crystal
- separation
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To separate and purify p-xylene, easily, by washing p-xylene crystal separated by the fractional crystallization with liquid 2C or 3C hydrocarbon, and melting the washed crystal thereby evaporating and separating the washing liquid.
CONSTITUTION: p-Xylene (PX) is crystallized from a hydrocarbon mixture by cooling, and separated by a centrifugal separator. Liquid 2C or 3C hydrocarbon or their mixture is introduced during the separation into the centrifugal separator as washing liquid, to remove the most part of the mother liquid attached to the drained PX crystal. The crystal is taken out of the separator, molten, and further heated to evaporate and separate the washing liquid from PX taking advantage of the large boiling point difference between them. The washing liquid, e.g. ethylene (b.p.: -72°C), propane (b.p.:-45°C), etc., is sprayed through a nozzle into the separator, and after evaporation and separation, compressed and liquefied, and used again as the washing liquid or as a refrigerant for the preparation of PX slurry, etc.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4731980A JPS56142220A (en) | 1980-04-09 | 1980-04-09 | Separation and purification of p-xylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4731980A JPS56142220A (en) | 1980-04-09 | 1980-04-09 | Separation and purification of p-xylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56142220A true JPS56142220A (en) | 1981-11-06 |
Family
ID=12771953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4731980A Pending JPS56142220A (en) | 1980-04-09 | 1980-04-09 | Separation and purification of p-xylene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56142220A (en) |
-
1980
- 1980-04-09 JP JP4731980A patent/JPS56142220A/en active Pending
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