FIELD: pharmaceutics. SUBSTANCE: crude birch tar is poured into distillation vessel to no more than 50% filling and the latter is heated through walls. Distillation of tar is carried out within a temperature range of 87-350 C. Average heating rate does not exceed 0.7 C/min between 87 and 230 C and 1 C/vby between 230 and 350 C. Temperature of decomposition products is controlled in at least two points. Finally, decomposition products are cooled and separated. EFFECT: increased yield of desired product.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARING TAR SUITABLE FOR MEDICAL PURPOSES | 1999 |
|
RU2146692C1 |
| METHOD FOR OBTAINING OF BIRCH EXTRACT AND TAR WATER USING BIRCH EXTRACT | 2016 |
|
RU2639916C1 |
| MEDICINAL AGENT FOR DERMATOSIS TREATMENT, METHOD FOR ITS PREPARING (VARIANTS) AND METHOD FOR TREATMENT OF SKIN DISEASE | 2003 |
|
RU2221587C1 |
| METHOD OF SEPARATING TAR AND SOLID PARTICLES FROM COAL LIQUFLYED PRODUCTS | 0 |
|
SU904530A3 |
| METHOD OF OBTAINING MESOPHASE PITCH | 0 |
|
SU1676455A3 |
| METHOD OF PRODUCING MESOPHASE PITCH | 0 |
|
SU1590047A3 |
| COAL CLEANING METHOD | 1988 |
|
RU2014350C1 |
| SAPROPEL BALSAMIC LINIMENT | 2008 |
|
RU2372925C2 |
| 0 |
|
SU379605A1 | |
| METHOD FOR OBTAINING COMPOSITION FOR PREPARATION OF ANTISEPTIC COMPOUNDS | 2005 |
|
RU2334519C2 |
