반응 #1106454

반응 방정식

Zinc sulphate

water

water

Alpha picoline

sulphuric acid

Nitric acid

→

zinc picolinate

수율 21.0%

반응 조건

후처리

1. 1
   workup.ADDITIONAfter the addition
2. 2
   온도the temperature was maintained at the same level for 20 hours
3. 3
   온도was cooled to ambient temperature
4. 4
   workup.ADDITIONwas added slowly
5. 5
   여과The precipitate was filtered
6. 6
   세척washed
7. 7
   기타dried

실험 절차

Alpha picoline 1.0 kg was slowly added to concentrated solution of sulphuric acid under agitation. After the addition was completed the mass temperature was raised to 180° C. and 6.0 kg of 70% Nitric acid was added and the temperature was maintained at the same level for 20 hours. After the reaction was over mass was cooled to ambient temperature and three times water was added. pH of the reaction mass was adjusted to 5.0. Zinc sulphate 600 grams dissolved in water was added slowly and the whole mass was stirred till a white precipitate appeared. The precipitate was filtered washed and dried to give 800 grams of zinc picolinate having 21% Zinc content (Desired limit 19-22%)

출처