Because of all these disvantages acetylchloride is used to react with absolute ethyl alcohol and synthesize ethyl acetate.

鉴于传统法存在上缺点,采用酰氯代替酸作为原料,不使用任何催化剂,不加热,常温反应来酸酯。

Xanthoxylin was extracted from Zanthoxylum Bungeanum Maxim of Sichuan Hanyuan using absolute ethyl alcohol, ether, acetone and water as solvent.

采用无水醇、醚、丙酮及水作剂,对四川汉源花椒作了精油提取研究。

Methods Infrared spectrophotometry with potassium bromide tabletting was adopted,in which the extract was carried out with the absolute alcohol as the solvent.

法无水醇为剂进行提取,采用红外分光光度法(溴化钾压片)进行定性鉴别。

Results Implantable chemotherapy pump by transcatheter right gastroepiploic artery(RGEA) in 3 cases and tumors absolute alcohol injection in 7 cases were operated successfully by laparoscopy.

结果3例腹腔镜下胃网膜右动脉置入化疗泵和7例无水醇注射均功,肿瘤区域显影良好,无副损伤和并发症,患者早期恢复顺利。