AT10018B - Process for the separation of para- and metacresol. - Google Patents
Process for the separation of para- and metacresol.Info
- Publication number
- AT10018B AT10018B AT10018DA AT10018B AT 10018 B AT10018 B AT 10018B AT 10018D A AT10018D A AT 10018DA AT 10018 B AT10018 B AT 10018B
- Authority
- AT
- Austria
- Prior art keywords
- cresol
- oxalic acid
- separation
- metacresol
- para
- Prior art date
Links
- IWDCLRJOBJJRNH-UHFFFAOYSA-N p-cresol Chemical compound CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 title claims description 13
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 3
- 238000000926 separation method Methods 0.000 title description 2
- 229940100630 metacresol Drugs 0.000 title 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 15
- 229930003836 cresol Natural products 0.000 claims description 7
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 150000003901 oxalic acid esters Chemical class 0.000 claims 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- QWVGKYWNOKOFNN-UHFFFAOYSA-N o-cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 description 2
- HWSUCUCDRPIHRZ-UHFFFAOYSA-N 4-methylphenol oxalic acid Chemical compound C1=CC(=CC=C1O)C.C(C(=O)O)(=O)O HWSUCUCDRPIHRZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- -1 cresol oxalic acid ester Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003739 xylenols Chemical class 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
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der nicht unerheblichen Löslichkeit des p-Kresols in concentrierter Oxalsäurelösung zweckmässig unter Zusatz von Benzol, was eine leichtere und vollkommenere Trennung des abgeschiedenen p-Kresols von der Oxalsäurelösung gestattet. Aus dem sich über der Oxal-
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nach dem Entwässern wieder verwendet werden.
Die Mengenverhältnisse zwischen Oxalsäure und Kresolgemisch können von den angeführten abweichen ; die oben angegebenen haben sich aber als besonders zweckmässig erwiesen. Auch die Roactionstempcratur kann innerhalb wei'ter Grenzen schwanken ; nur darf dieselbe die Zersetzungstemperatur der Oxalsäure wegen der damit verbundenen VerLusteanletzterernichterreichen.
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einerseits durch die Löshchkoit des p-Kresoloxalsäureesters im Kresolgemische bedingt sind, andererseits auch von den bei der Esterificierung sich bildenden Wassermengen abhängen.
Letztere dürfen eine gewisse Grenze nicht überschreiten, da sie sonst von dem Über- schüssigen Kresol, welches bei der REaction die Rolle des wasserentziehenden Mittels spielt nicht mehr so fest gebunden werden können, dass die verseifende Wirkung auf den
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genommen werden, welches noch o-Kresol und Xylenole enthält. In diesem Falle wird das m-Kresol nachträglich durch wiederholtes Fractionieren des vom p-Kresol vorher befreiten Kresolgemischesgewonnen.
PATENT-ANSPRÜCHE :
1. Verfahren zur Darstellung von Kresoloxalsäureester. darin bestehend, dass man
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<Desc / Clms Page number 1>
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the not inconsiderable solubility of p-cresol in concentrated oxalic acid solution, expediently with the addition of benzene, which allows easier and more complete separation of the separated p-cresol from the oxalic acid solution. From the over the Oxal
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can be used again after draining.
The proportions between oxalic acid and cresol mixture can differ from those listed; however, those given above have proven to be particularly useful. The temperature of roaction can also fluctuate within wide limits; only it must not reach the decomposition temperature of oxalic acid because of the losses connected with it.
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are caused on the one hand by the dissolution of the p-cresol oxalic acid ester in the cresol mixture, on the other hand they also depend on the amounts of water formed during the esterification.
The latter must not exceed a certain limit, since otherwise they can no longer be bound so tightly by the excess cresol, which plays the role of the dehydrating agent in the reaction, that the saponifying effect on the
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which still contains o-cresol and xylenols. In this case, the m-cresol is subsequently obtained by repeated fractionation of the cresol mixture previously freed from the p-cresol.
PATENT CLAIMS:
1. Process for the preparation of cresol oxalic acid ester. consisting in that one
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Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT10018T | 1901-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT10018B true AT10018B (en) | 1902-11-25 |
Family
ID=3504661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT10018D AT10018B (en) | 1901-11-28 | 1901-11-28 | Process for the separation of para- and metacresol. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT10018B (en) |
-
1901
- 1901-11-28 AT AT10018D patent/AT10018B/en active
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