反应详情

Next, 54 grams of dicalcium phosphate dihydrate was slurried with 400 g of water and then 200 g of aluminum hydroxide gel prepared above was reslurried in 100 ml of water and added to the dicalcium phosphate dihydrate slurry at a rate of 15 ml/min. The slurry was mixed for 15 minutes with agitation and the resultant product recovered by filtration to form a wetcake. This wetcake was then re-slurried with 150 g of water and combined with an aqueous dye solution, and mixed together for approximately 1 hour to form a slurry of colored calcium phosphate. For the slurry of Example No. 1, the aqueous dye solution was 200 ml of a 1% FD&C Blue No. 1 aqueous solution. The aqueous dye solution of Example 2 was 200 ml of 1% aqueous solution of FD&C Blue #2; for Example 3 it was 200 ml of 0.75% aqueous red solution (1.29 g FD&C red #33 and 0.21 g FD&C red #40); and for Example 4 the aqueous dye solution was 40 ml of a 2% aqueous solution FD&C yellow #5 and 160 ml of a 1% aqueous solution of FD&C Blue #1 to form a green aqueous dye solution.

1. additionThe slurry was mixed for 15 minutes with agitation
2. filtrationthe resultant product recovered by filtration
3. customto form a wetcake
4. additionmixed together for approximately 1 hour