Taking corn starches as raw material, sodium tripolyphosphate as esterifying agent 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。
The stable derivative of L-ascorbic acid, L-ascorbic Acid-2-sulphuric acid ester dipotassium salts are synthesized using potassium pyrosulfate as esterifying agent and pyridine as solvent.
以焦硫酸钾为酯化剂，以吡啶为溶剂合成了L- 抗坏血酸的稳定衍生物L- 抗坏血酸- 2 - 硫酸酯二钾盐。
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