Acetylacetone → HCID 159868, compound

Participants

Reaction Steps

444 g (6 mol) of calcium hydroxide was added to the kneader used in Comparative Example 1, and stirred. Thereafter, 1,320 g [13.2 mol, calcium hydroxide/acetylacetone=1/2.2 (molar ratio)] of acetylaceton was dropped into the kneader over 3 hours. The reaction temperature was between 43 and 65° C. After completion of the dropping, at a temperature of from 65 to 66° C., the mixture was stirred and mixed for aging over 4 hours until the reaction was complete. The resultant powder was slightly moisture-laden. The resulting product was warmed under a flow of nitrogen gas. At the point where the temperature reached 68° C., the product was subjected to the drying step, and dried at 106 to 138° C. for 10 hours until the moisture or water content was reduced to 0.46% by weight. Thereafter, the dried product was cooled to give 1,425 g of white calcium acetylacetonate [yield 98.2 mol % (calcium hydroxide basis), purity 98.6% by weight].

Provenance & Evidence