Товарлар кимёси ва халқ табобати 1-jild 4-son (2022) · 36-51-betlar
PURIFICATION OF NAPHTHENIC ACIDS FROM UNSAPONIFIABLE COMPONENTS AND PHENOLS
Ismoilov, Muminjon Yu., Mamarasulov, Khamdamjon A., Abdusattorova, Zulayxo A., Saydaliev, Jamoliddin K.
Annotatsiya
The article shows new methods of purification of naphthenic acids from unsaponifiable components and phenols. Also, purified salts of naphthenic acids react with a 25% hydrochloric acid solution, naphthenic acids and the aqueous layer are removed with petroleum ether, the extract is washed with a saturated sodium chloride solution and distilled water until neutral. After drying the acids with anhydrous sodium sulfate, the petroleum ether is distilled off first on a water bath at atmospheric pressure and then the residue under vacuum at 2.66 kPa. The acids are separated into fractions at 0.27-0.53 kPa. At the same time, they are purified from impurities of resins and obtained in the form of pale yellow transparent oils containing no more than 1% of unsaponifiable substances. The yield of purified fractions is determined on the basis of experiments and is 94-97%.
Ацидолмыложирные кислотыфенолыэмульгированиеэкстрактэлюированиехлороводородметанолсложный эфир
Metadata manbasi: jurnal OAI-PMH arxivi · Sindex toʻliq matnni saqlamaydi, manbaga havola beradi.