SU143388A1 - Method for producing alpha-hydroxyisobutyric acid - Google Patents
Method for producing alpha-hydroxyisobutyric acidInfo
- Publication number
- SU143388A1 SU143388A1 SU723002A SU723002A SU143388A1 SU 143388 A1 SU143388 A1 SU 143388A1 SU 723002 A SU723002 A SU 723002A SU 723002 A SU723002 A SU 723002A SU 143388 A1 SU143388 A1 SU 143388A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- isobutylene
- hydroxyisobutyric acid
- producing alpha
- oxidation
- acid
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Известны способы получени сх-оксиизомасл ной кислоты путем окислени изобутилена окислами азота. При этом нар ду с образую1цеГ|СЯ с.-нитратоизол:асл ной кислотой получаетс сложна смесь ннтропронзводных изобутилена, которые представл ют определенную опасность, особенно в момент отгонки, так как часто привод т к самопроизвольному неуправл емому окислению и взрыву.Methods for the preparation of c-hydroxy-isobutyric acid by oxidation of isobutylene with nitrogen oxides are known. At the same time, along with the formation of CeH | SJ s.-nitratoisol: with hydrochloric acid, a complex mixture of isoputylene isobutylene is obtained, which present a certain danger, especially at the moment of distillation, since they often lead to spontaneous uncontrollable oxidation and explosion.
Кроме того, Э1И способы предусматривают отгонку избыточной четырехокиси азота в вакууме при температуре +5°, а гидролиз продуктов окислени изобутилена четырехокисного азота производитс азотной кислотой различной коннентрапии при температуре +15°.In addition, the E1I methods provide for the distillation of excess nitrogen tetroxide in vacuum at + 5 ° C, and the oxidation products of tetroxide nitrogen isobutylene are produced by nitric acid of various concentrations at + 15 ° C.
Предлагаемый способ позвол ет устранить указанные недостатки пухе.м проведени гладкого и полного окислени изобутилена четырехокисью азота в а-нитратоизомасл ную кислоту без образовани сопутствующих нитропроизводных изобутилена. Это достигаетс путем введени в процесс окислени изобутилена четырехокисью азота катализаторов , например, К2СОз, KNOs, MgO, NaNOa, Ха2СОз и др. Лучшие результаты получены с К2СОз.The proposed method makes it possible to eliminate the indicated disadvantages of fluffing of smooth and complete oxidation of isobutylene with nitrogen tetroxide to α-nitratoisobutyric acid without the formation of accompanying nitro derivatives of isobutylene. This is achieved by introducing catalysts such as K2CO3, KNOs, MgO, NaNOa, Xa2CO3, etc., into the oxidation of isobutylene with nitrogen tetroxide. The best results are obtained with K2CO3.
В предлагаемом способе избыточную четырехокись азота удал ют воздухо.м при температуре Н-15 ;- -30°, а гидролиз продуктов окислени изобутилена производ т вод ным паром при температуре 100 без применени азотной кислоты. Весьма значительным преимуществом гидролиза вод ным паром вл етс то, что при этом получаетс только а-оксиизомасл на кислота без примеси а-нитратоизомасл ной кислоты.In the proposed method, excess nitrogen tetroxide is removed by air m at a temperature of H-15; -30 °, and hydrolysis of the products of isobutylene oxidation is performed by water vapor at a temperature of 100 without using nitric acid. A very significant advantage of steam hydrolysis is that it only produces a-hydroxy-butyric acid without the admixture of a-nitrato-isobutyric acid.
Процесс получени а-оксиизомасл ной кислоты окислением изобутилена четырехокисью азота можно изобразить следующими упавнеии ми:The process of a-hydroxy-isobutyric acid production by oxidation of isobutylene with nitrogen tetroxide can be represented as follows:
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU723002K SU143389A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing methacrylic acid and its derivatives |
| SU723002L SU143390A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing methacrylamide |
| SU723002A SU143388A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing alpha-hydroxyisobutyric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU723002A SU143388A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing alpha-hydroxyisobutyric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU143388A1 true SU143388A1 (en) | 1961-11-30 |
Family
ID=48299157
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU723002K SU143389A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing methacrylic acid and its derivatives |
| SU723002L SU143390A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing methacrylamide |
| SU723002A SU143388A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing alpha-hydroxyisobutyric acid |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU723002K SU143389A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing methacrylic acid and its derivatives |
| SU723002L SU143390A1 (en) | 1961-03-23 | 1961-03-23 | Method for producing methacrylamide |
Country Status (1)
| Country | Link |
|---|---|
| SU (3) | SU143389A1 (en) |
-
1961
- 1961-03-23 SU SU723002K patent/SU143389A1/en active
- 1961-03-23 SU SU723002L patent/SU143390A1/en active
- 1961-03-23 SU SU723002A patent/SU143388A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| SU143389A1 (en) | 1961-11-30 |
| SU143390A1 (en) | 1961-11-30 |
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