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ID number:498111
 
Author:
Evaluation:
Published: 17.05.2012.
Language: Latvian
Level: College/University
Literature: 7 units
References: Not used
Extract

200 ml toluola enerģiski krata (~ 1h) ar 50 ml konc. sērskābi (temperatūrā līdz 30°C). Atdala skābi (piem. dalāmajā piltuvē). Pēc tam vielu mazgā ar ūdeni un 0,1 M nātrija hidroksīdu un vēl vairākas reizes ar ūdeni.
Lai vielu atūdeņotu 1 h ļauj iedarboties ar Na, inertā atmosfērā (piem. slāpeklis vai argons). Pēc tam pievieno vēl . Visbeidzot vielu frakcionēti destilē, atdalot pirmos 10 % un pēdējos 20 % destilāta.
Tīrību pārbauda nosakot kuš. temperatūru vai blīvumu.

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