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研究了以油酸、辛醇为原料,硫酸为催化剂,采取直接减压一步脱水法合成油酸辛酯的硫酸化物的方法:酯化反应摩尔比为油酸∶辛醇∶硫酸=1∶114∶0027,在115℃下反应2~3h至体系pH值小于5为终点。产物为灰褐色,收率为95%。磺化反应温度控制在45℃以下,滴加98%浓硫酸,在44~46℃下搅拌反应2~3h后,静置过夜。硫酸化物经两次45℃饱和食盐水洗涤,收率为115%。在搅拌下慢加NaOH溶液于洗涤过的硫酸化物中中和至pH=6~8,拼入7#或5#机油,即得到红棕色透明液体的新型皮革加脂剂ZD。同时报道了该产品的质量指标及在皮革生产上的应用 相似文献
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Cyclic voltammetry was used to investigate the reaction of erythromycin (EM) with dissolved oxygen on gold nanopartiele-modified electrodes prepared via electrodeposition. A well-defined reduction peak at -0.420 V and a reoxidation peak at -0.055 V were observed. With the addition of EM into the NaOH solution containing dissolved oxygen, the oxidation peak at -0.055 V was still indiscernible. However, a new oxidation peak at 0.200 V appeared, which suggests the interaction between EM and dissolved oxygen. Therefore, this method can be used for the analysis of EM in tablets. The present method is simple, reproducible, and does not require complex analytical instruments. 相似文献
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