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- The productivity of ethyl 3-hydroxybutyrate could be attained 96.6% under the following optimum conditions:3-hydroxybutyric acid 0.1mol,ethanol 0.12mol,paratoluenesulfonic acid (0.717 5g),cyclohexane 50mL,CaO18.7g and reaction time 3h. 当原料配比为:0 1mol3-羟基丁酸、0 12mol乙醇,0 7175g对甲苯磺酸,带水剂环己烷50mL,脱水剂18 7g氧化钙,反应时间3h时,产品3-羟基丁酸乙酯的收率可达96 6%25(质量分数,下同)。
- The productivity of ethyl 3-hydroxybutyratecould be 96.60% under the following optimum conditions: 3-hydroxybutyric acid 0.1mol, ethanol 0.12mol, paratoluenesulfonic acid 0.7175 g, cyclohexane 50 mL,CaO18.70 g and reaction time 3h. 当0.;1mol 3-羟基丁酸;0
- paratoluenesulfonic acid ammonium salt 对甲苯磺酸铵
- paratoluenesulfonic acid sodium salt 对甲苯磺酸钠
- Synthesis of isobutyl acetate catalyzed by paratoluenesulfonic acid 对甲苯磺酸催化合成乙酸异丁酯
- He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
- Acid irritates the stomach lining. 酸能刺激胃黏膜。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。
- Can Jones beat Smith? That's the acid test. 琼斯能击败史密斯吗？那是个严峻的考验。
- paratoluenesulfonic acid 对甲苯磺酸
- A salt or an ester of boric acid. 硼酸盐一种硼酸盐或硼酸酯
- She dropped acid in high school. 她高中时代服迷幻药。
- The metal is fretted with the acid. 金属被酸腐蚀。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
- The acid has eaten through the metal cover. 酸已把金属盖子蚀穿了。
- The worker's overalls were badly burned by acid. 这位工人的工作装被酸腐蚀得很厉害。
- An acid can react with a base to form a salt. 酸可以和碱起反应而生成盐。
- This substance must be treated with acid. 这材料得用酸来处理。
- The acid burnt a hole in the carpet. 酸把地毯烧了个洞。
