FIELD: chemistry.
SUBSTANCE: invention concerns method of obtaining ammonium salt of 2-hydroxy-4-methylthiobutyric acid by reaction of 3-methylthiopropionic aldehyde with hydrogen cyanide, with obtainment of 2-hydroxy-4-methylthiobutyronitrile and further catalytic hydrolysis of indicated nitrile in the presence of titanium dioxide catalyst or its crystalline modifications. Anatase or anatase mix with rutile can be used as catalyst.
EFFECT: significantly simplified and cost-effective method of obtainment due to the use of indicated catalyst.
7 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING 2-HYDROXY-4-(METHYLTHIO)BUTANENITRILE FROM 3-(METHYLTHIO)PROPANAL AND HYDROGEN CYANIDE | 2012 |
|
RU2604534C2 |
| STORAGE-STABLE NITRILE OF 2-HYDROXY-4-(METHYLTHIO) BUTYRIC ACID | 2012 |
|
RU2597264C2 |
| METHOD OF PREPARING 2-HYDROXY-4-METHYLTHIOBUTYRIC ACID | 1996 |
|
RU2160730C2 |
| METHOD OF SYNTHESIS OF 2-HYDROXY-4-METHYLTHIOBUTYRIC ACID (HYDROXY-ANALOG OF METHIONINE) | 1995 |
|
RU2130925C1 |
| METHOD FOR CATALYTIC CONVERSION OF 2-HYDROXY-4-METHYLTHIOBUTANE NITRILE (HMTBN) TO 2-HYDROXY-4-METHYLTHIOBUTANE AMIDE (HMTBA) | 2008 |
|
RU2479574C2 |
| METHOD FOR CONVERSION OF METHYL MERCAPTOPROPIONALDEHYDE PRODUCED FROM CRUDE ACROLEIN AND CRUDE METHYL MERCAPTAN | 2012 |
|
RU2615734C2 |
| METHOD OF SEPARATION AND CLEANING OF METHYONINE HYDROXYANALOGUE OBTAINED BY HYDROLYSIS OF CYANHYDRINES | 2016 |
|
RU2649012C2 |
| 2-METHYLTHIOETHYL SUBSTITUTED HETEROCYCLES AS ADDITIVES TO FORAGE | 2008 |
|
RU2516833C2 |
| METHOD FOR PREPARING HYDROXYMETHYLTHIOBUTYRIC ACID ESTERS | 2000 |
|
RU2230737C2 |
| METHOD OF PRODUCING METHIONINE SALTS | 2012 |
|
RU2618042C2 |
