CH162631A - Process for the preparation of formic acid from formates. - Google Patents
Process for the preparation of formic acid from formates.Info
- Publication number
- CH162631A CH162631A CH162631DA CH162631A CH 162631 A CH162631 A CH 162631A CH 162631D A CH162631D A CH 162631DA CH 162631 A CH162631 A CH 162631A
- Authority
- CH
- Switzerland
- Prior art keywords
- formates
- formic acid
- preparation
- acid
- extracted
- Prior art date
Links
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 title claims description 20
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 title claims description 10
- 235000019253 formic acid Nutrition 0.000 title claims description 10
- 150000004675 formic acid derivatives Chemical class 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 4
- 238000002360 preparation method Methods 0.000 title description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- NMJJFJNHVMGPGM-UHFFFAOYSA-N butyl formate Chemical compound CCCCOC=O NMJJFJNHVMGPGM-UHFFFAOYSA-N 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000004508 fractional distillation Methods 0.000 description 2
- -1 95-98% of the acid Chemical compound 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/02—Preparation of carboxylic acids or their salts, halides or anhydrides from salts of carboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung von Ameisensäure aus Formiaten. Das Hauptpatent betrifft ein Verfahren zur Herstellung von Ameisensäure aus For- miaten, welches dadurch gekennzeichnet ist, dal3 man Formiate mit verdünnter Salpeter säure bei tiefer Temperatur in Gegenwart von Puffersubstanzen, z. B. Formiaten, Harn stoff oder Aminen, behandelt, und die ent standene Ameisensäure aus dem Reaktions gemisch, z. B. durch Extraktion oder fraktio nierte Destillation, gewinnt.
Es wurde nun gefunden, dass man freie Ameisensäure auch in Abwesenheit von Puf fersubstanzen durch Umsetzung von For- miaten mit Salpetersäure gewinnen kann, wenn man die Formiate bei tiefer Tempera tur, z. B. bei 0 bis -200 mit der Salpeter säure vollständig umsetzt und die dabei ent stehende freie Ameisensäure ebenfalls in der gälte mittelst eines Lösungsmittels extrahiert. <I>Beispiel:</I> 390 gr Caloiumformiat werden mit 645 gr Wasser aufgeschlämmt und mit 610 gr 62 Ob iger Salpetersäure unter Kühlung zwischen 00 und<B>-100 0</B> versetzt.
Nach erfolgtem Umsatz wird die in Frei heit gesetzte Ameisensäure mit Butylformiat extrahiert. Bei einer normalen kontinuierlichen Extraktion beziehungsweise bei einer zirka 8-10maligen Einzelextraktion mit der glei chen Menge Butylformiat kann man praktisch alle Ameisensäure, das heisst 95-98% der Säure extrahieren.
Die Trennung der Ameisensäure vom Ex traktionsmittel erfolgt darauf, wie üblich, durch fraktionierte Destillation.
Process for the preparation of formic acid from formates. The main patent relates to a process for the production of formic acid from formates, which is characterized in that formates are mixed with dilute nitric acid at low temperature in the presence of buffer substances, e.g. B. formates, urea or amines, treated, and the ent formed formic acid from the reaction mixture, z. B. by extraction or fractional distillation wins.
It has now been found that free formic acid can be obtained even in the absence of buffer substances by reacting formates with nitric acid if the formates are at low tempera ture, eg. B. at 0 to -200 with the nitric acid completely reacted and the resulting free formic acid also extracted in the cold by means of a solvent. <I> Example: </I> 390 grams of potassium formate are slurried with 645 grams of water and mixed with 610 grams of 62 above nitric acid while cooling between 00 and <B> -100 0 </B>.
After the conversion has taken place, the formic acid set free is extracted with butyl formate. With a normal continuous extraction or with an approximately 8-10 single extraction with the same amount of butyl formate, practically all formic acid, i.e. 95-98% of the acid, can be extracted.
The separation of the formic acid from the extraction agent then takes place, as usual, by fractional distillation.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH158236T | 1931-03-31 | ||
| CH162631T | 1931-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH162631A true CH162631A (en) | 1933-06-30 |
Family
ID=25717051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH162631D CH162631A (en) | 1931-03-31 | 1931-03-31 | Process for the preparation of formic acid from formates. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH162631A (en) |
-
1931
- 1931-03-31 CH CH162631D patent/CH162631A/en unknown
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