SU61643A1 - The method of obtaining highly concentrated formic acid - Google Patents
The method of obtaining highly concentrated formic acidInfo
- Publication number
- SU61643A1 SU61643A1 SU33830A SU33830A SU61643A1 SU 61643 A1 SU61643 A1 SU 61643A1 SU 33830 A SU33830 A SU 33830A SU 33830 A SU33830 A SU 33830A SU 61643 A1 SU61643 A1 SU 61643A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- formic acid
- highly concentrated
- obtaining highly
- concentrated formic
- vinyl
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Известны способы получени высококонцентрированной муравьиной кислоты, однако получение 100%-ной муравьиной кислоты, необходимой дл р да химических процессов, представл ет сложную операцию, в особенности с св зи с тем, что муравьина кислота образует с водой азеотропические смеси (77,5% муравьиной кислоты и 22,5% воды).There are known methods for producing highly concentrated formic acid, however, obtaining 100% formic acid, which is necessary for a number of chemical processes, is a difficult operation, especially since it is azeotropic with water (77.5% formic acid). acids and 22.5% water).
Согласно изобретению установлено, что безводна муравьина кис-лота весьма легко может быть получена из обычных ее технических сортов (65-80%) при проведении реакции между водной муравьиной кислотой и виниловым эфиром муравьиной кислоты. Процесс этот основываетс на установленной способности винилформиата при умеренной температуре количественно вступать в реакцию с водой, содержащейс в технической муравьиной кислоте по уравнению:According to the invention, it has been established that anhydrous formic acid can be very easily obtained from its usual technical varieties (65-80%) when carrying out the reaction between aqueous formic acid and formic acid vinyl ester. This process is based on the established ability of vinyl formate at a moderate temperature to quantitatively react with water contained in technical formic acid according to the equation:
СНа СН-СОСН -НгОСНзСНО НСООН:SN of CH-SACH -NgOSNzSNO NSAF:
Выдел ющийс ацетальдегид получаетс путем изомеризации отщепл ющегос при омылении винилформиата винилового спирта. Вследствие больщой разности температур кипени муравьиной кислоцы и ацетальдегида последний легко отгон етс и улавливаетс .Separated acetaldehyde is obtained by isomerization of vinyl alcohol formate that is cleaved during saponification of vinyl alcohol. Due to the large temperature difference between the boiling point of formic acid and acetaldehyde, the latter is easily distilled off and trapped.
Пример. К 100 г 80%-ной муравьиной кислоты добавл етс 80 . винилформиата и полученна смесь нагреваетс до 80° под обратным холодильником в течение 3 час (до завершени реакции омылени винилформиата ), после чего образовавшийс ацетальдегид отгон етс , В остатке получаетс безводна муравьина кислота, очищаема перегонкой .Example. 80 is added to 100 g of 80% formic acid. The vinyl formate and the resulting mixture are heated to 80 ° under reflux for 3 hours (until the completion of the saponification of the vinyl formate), after which the acetaldehyde formed is distilled off. The residue gives anhydrous formic acid, purified by distillation.
Предмет изобретени Subject invention
Способ получени высококонцентрированной муравьиной кислоты, отличающийс тем, что техническую, например, 80-85%-ную му-равьиную кислоту нагревают совместно с виниловым эфиром муравьиной кислоты.A process for the preparation of highly concentrated formic acid, characterized in that technical, for example, 80-85% mu-formic acid is heated together with formic acid vinyl ester.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU33830A SU61643A1 (en) | 1940-07-16 | 1940-07-16 | The method of obtaining highly concentrated formic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU33830A SU61643A1 (en) | 1940-07-16 | 1940-07-16 | The method of obtaining highly concentrated formic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
SU61643A1 true SU61643A1 (en) | 1941-11-30 |
Family
ID=48243003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU33830A SU61643A1 (en) | 1940-07-16 | 1940-07-16 | The method of obtaining highly concentrated formic acid |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU61643A1 (en) |
-
1940
- 1940-07-16 SU SU33830A patent/SU61643A1/en active
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