| 摘要 |
PURPOSE:To provide the title coagulant free from offensive odor, easy to process with the raw material inexpensive, with a small amount needed due to its high alkalinity, liable to be dissolved, and miscible homogeneously, consisting mainly of an oyster-shell-ashed product obtained by heating oyster-shells to a specified elevated temperature. CONSTITUTION:The objective coagulant consisting mainly of an oyster-shell- ashed product obtained by heating oyster-shells (including shellfish) to 800-1200 deg.C. |
