Calcium Chloride → HCID 18755102, compound

Participants

Reaction Conditions

Reaction Steps

268 Grams of 5-sulfoisophthalic acid sodium salt were placed together with 500 g of ion exchanged water in a reactor equipped with a stirrer. The contents in the reactor were heated with stirring to 80° C. so that the sodium salt was dissolved in water. A solution of calcium chloride dissolved in an amount of 55.5 g into 100 g of ion exchanged water was then gradually added dropwise to the thus obtained solution. The resulting mixture was concentrated by evaporation to remove 250 g of water and then cooled to 10° C. and filtered to separate white precipitates. The precipitates were dispersed in 300 g of ion exchanged water. The dispersion was heated to 80° C., maintained at that temperature for 1 hour, cooled to 10° C. and then filtered. The precipitates were washed with water. Such a procedure including dispersion, heating, filtration and washing steps was repeated once more. The thus obtained precipitates were dried at 150° C. for 5 hours to obtain 141 g of 5-sulfoisophthalic acid calcium salt of the formula (3) shown below as a white powder. The atomic absorption analysis revealed that the 5-sulfoisophthalic acid calcium salt powder contained 7.5% by weight of calcium.

Provenance & Evidence