Taking corn starches as raw material, sodium tripolyphosphate as esterifyingagent and carbamide as catalyst, high-viscosity phosphate starch is prepared by semidry process.
以玉米淀粉为原材料、三聚磷酸钠为酯化剂、碳酰二胺为催化剂，半干法制备了高粘度磷酸酯淀粉。
2
The stable derivative of L-ascorbic acid, L-ascorbic Acid-2-sulphuric acid ester dipotassium salts are synthesized using potassium pyrosulfate as esterifyingagent and pyridine as solvent.