RO85545B1 - Procedeu de purificare a alfa-hitronaftalinei - Google Patents
Procedeu de purificare a alfa-hitronaftalineiInfo
- Publication number
- RO85545B1 RO85545B1 RO110863A RO11086383A RO85545B1 RO 85545 B1 RO85545 B1 RO 85545B1 RO 110863 A RO110863 A RO 110863A RO 11086383 A RO11086383 A RO 11086383A RO 85545 B1 RO85545 B1 RO 85545B1
- Authority
- RO
- Romania
- Prior art keywords
- alpha
- nitronaphthalene
- isomer
- ethanol
- cooling
- Prior art date
Links
- RJKGJBPXVHTNJL-UHFFFAOYSA-N 1-nitronaphthalene Chemical compound C1=CC=C2C([N+](=O)[O-])=CC=CC2=C1 RJKGJBPXVHTNJL-UHFFFAOYSA-N 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 4
- 238000001816 cooling Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 230000002934 lysing effect Effects 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000001953 recrystallisation Methods 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Inventia se refera la un procedeu de purificare a alfanitronaftalinei prin recristalizare, constînd din dizolvarea acesteia într-un alcanol inferior, de preferinta metanol sau etanol, cu sau fara adaos de apa si agent activ de suprafata la o temperatura de 55...90 degree C urmata de racirea solutiei obtinute constînd din aceea ca, în scopul reducerii continutului de izomer beta sub 0,5% si a cresterii randamentului de recuperare a izomerului alfa la 87...91%, dizolvarea alfa.nitronaftalinei se face în metanol sau etanol cu un continut de 0...10% apa, de preferinta 5%, în asa fel încît sa se obtina la o temperatura de 64...80 degree C, o solutie de concentratie cuprinsa între 30...40%, de preferinta 35%, care se raceste la 20...25 degree C cu formarea cristalelor îmbogatite cu izomer alfa, care se filtreaza, dupa care din filtratul rezultat, prin racire la 0...-5 degree C, se separa prin filtrare un al doilea precipitat care, cu sau fara uscare, se recircula la o noua recristalizare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO110863A RO85545B1 (ro) | 1983-05-05 | 1983-05-05 | Procedeu de purificare a alfa-hitronaftalinei |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO110863A RO85545B1 (ro) | 1983-05-05 | 1983-05-05 | Procedeu de purificare a alfa-hitronaftalinei |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RO85545A2 RO85545A2 (ro) | 1984-10-31 |
| RO85545B1 true RO85545B1 (ro) | 1984-11-30 |
Family
ID=20113034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO110863A RO85545B1 (ro) | 1983-05-05 | 1983-05-05 | Procedeu de purificare a alfa-hitronaftalinei |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO85545B1 (ro) |
-
1983
- 1983-05-05 RO RO110863A patent/RO85545B1/ro unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RO85545A2 (ro) | 1984-10-31 |
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