戊酸异酯

The effect of ratio of hydroxyl acid, amount of catalyst and reaction time to the yield of sioamyl propionate were investigated.

探讨了醇酸物质的量比、催化剂用量、反应时间对丙酸异戊酯产品收率的影响。

Methods: The effects of the ratio of reactants, the amount of the catalyst used, the reaction time and the amount of an water-taking agent on synthesizing isoamyl cinnamate were investigated to obtain a suitable condition for synthesizing the ester.

考察了醇酸比、反应时间、带水剂用量等因素对合成肉桂酸异戊酯的影响，得到合成该酯的较适宜条件。结果：最佳反应条件为n：n=5：1，催化剂用量为肉桂酸用量的20%，反应时间2h，反应温度110～118℃，酯收率可达76.6%。

The results showed that solid hetero-polyacid salt TiSiW12O40/TiO2 was a good catalyst for synthesizing iso-amyl propionate.

实验结果表明：固体杂多酸盐TiSiW12O40/TiO2对丙酸异戊酯的合成具有良好的催化活性。

The result was shown as follows:compared with the good quality beer,the diacetyl,aldehyde,islobutyl alcohol,isoamyl alcohol and total acid were higher,however,propyl alcohol and ethyl butyrate were lower

研究中还发现污染细菌后的发酵过程中的pH下降迅速，降糖加快，最终得到的啤酒中双乙酰、乙醛、异戊醇、异丁醇和总酸偏高，而正丙醇、丁酸乙酯含量偏低。

Results: The optimum conditions were found to be as follows: the molar ratio of isoamyl alcohol to cinnamic acid was ...

对甲苯磺酸是合成肉桂酸异戊酯的良好催化剂，具有实际应用价值，该实验合成工艺简单，酯收率较高。

The results indicated that the total quantity of volatile components in grape wine after MLF had increased and there were evident difference in the contents and proportion of isoamyl alcohol, 2-ethyl hydracrylic acid, ethyl succinate, and acetic acid in the two kinds of grape wine treated or not treated by MLF.

结果表明，MLF葡萄酒较未经MLF的葡萄酒中挥发性成分的总量有所提高；异戊醇、2-羟基丙酸乙酯、琥珀酸乙酯和醋酸在两工艺的葡萄酒中的含量和比例存在明显差异；乳酸、乳酸乙酯和两种未能准确鉴定的物质只在MLF葡萄酒中作为主要成分被分离检测到。

The results indicated that the total quantity of volatile components in grape wine after MLF had increased and there were evident difference in the contents and proportion of isoamyl alcohol, 2-ethyl hydracrylic acid, ethyl succinate, and acetic acid in the two kinds of grape wine treated or not treated by MLF. Besides, lactic acid and ethyl lactate, which could not be accurately identified in grape wine not treated by MLF, could be easily separated and identified in grape wine treated by MLF like other main components.

结果表明，MLF葡萄酒较未经MLF的葡萄酒中挥发性成分的总量有所提高；异戊醇、2-羟基丙酸乙酯、琥珀酸乙酯和醋酸在两工艺的葡萄酒中的含量和比例存在明显差异；乳酸、乳酸乙酯和两种未能准确鉴定的物质只在MLF葡萄酒中作为主要成分被分离检测到。

Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.

以硫酸氢钾为催化剂，正丁酸和异戊醇为原料合成了正丁酸异戊酯。

The tribological characteristics of the esterified Castor oil is better than those of Castor oil, Di-iso-butyl sebacate, Pentaerythritol esters , mineral oil 150#, bean oil, Rapeseed oil. As part of 12-hydroxyl of Castor oil acid has transformed into ester so that the isomerization degree of esterified castor oil increases with the branching carbon chain extending.

四球机测定酯化蓖麻油的摩擦性能优良；优于蓖麻油、癸二酸二异辛酯、季戊四醇酯、矿物油VG150〓、豆油和菜籽油；酯化蓖麻油的流变性能改进的机理认为是部分12-OH酯化后，直链的植物油结构异构化。

Using ferric chloride, aluminum chloride and cupric chloride as catalytics in the synthesis of isoamyl formate,acetate and propionate.

本文分别用氯化铁、氯化铝和氯化铜催化合成甲、乙、丙酸异戊酯，实验证明氯化铁、氯化铝有较高催化活性，对五个碳以下的有机酸和醇的酯化活性较高，并对其机理进行了探讨。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。