Phosphoric Acid → Magnesium Phosphate

A solution obtained by diluting 2.7 kg of a 85% by weight solution of phosphoric acid with ion-exchanged water to a total quantity of 100 kg was gradually added with stirring to a solution obtained by adding 2 kg of magnesium hydroxide to 300 kg of ion-exchanged water, and then further adding and dissolving therein 2 kg of diglycerol monocaprate (trade name: “SUNSOFT Q-10 D”; HLB=9.5; monoester content: 85% by weight; specific gravity: 0.9; manufactured by Taiyo Kagaku Co., Ltd.). The pH of the resulting mixture was adjusted to 8 using a handy pH meter manufactured by HORIBA, Ltd. After forming of the salt of magnesium phosphate by neutralization reaction was terminated, the resulting reaction mixture was subjected to solid-liquid separation by centrifugation (3000×g, for 10 minutes), and 4 kg (dry weight basis) of magnesium phosphate of the solid phase portion was collected (average particle size of fine metal particles: about 0.31 μm). The magnesium phosphate was resuspended in ion-exchanged water, to give a magnesium phosphate dispersion composition having a solid content of 10% by weight (20 parts by weight of an emulsifier were contained based on 100 parts by weight of the metal salt). The resulting composition was filled in a clear container, and stored with leaving it at rest for 1 month at normal temperatures. As a result, the composition was excellent in dispersion stability, with no occurrence of separation and precipitation of the constituents.

1. customA solution obtained
2. additionwas gradually added
3. customobtained
4. additionfurther adding
5. dissolutiondissolving

ORD record

ord-7d0105477d474d74bd871f15560b2e8d

Source dataset

uspto-grants-2011_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07923024B2