US4700000A - Preparation of calcium propionate - Google Patents

http://www.google.de/patents?hl=de&lr=&vid=USPAT4700000&id=yr04AAAAEBAJ&oi=fnd&dq=solubility+of+%22calcium+propionate%22+&prints

Calcium propionate is prepared by passing a vaporous mixture of propionic acid and water into an aqueous solution containing calcium propionate and calcium hydroxide, with or without propionic acid.