英语释义

1. a reversible reaction in which one ester is converted into another (as by interchange of ester groups with an alcohol in the presence of a base)

片语

transesterification process酯交换法

transesterification method酯交换法

phospho transesterification膦酰酯交换

melt transesterification酯交换

twice transesterification二次转酯反应

homogeneous transesterification均相酯化反应

catalyzed transesterification催化酯交换反应

transesterification rate酯交换率

Enzymatic transesterification酯化反应

英汉例句

• biodiesel fuel, as a renewable energy and pro-environmental energy, can be produced by the transesterification reaction of vegetable oils or fatty acids with short chain alcohols.

  生物柴油作为一种可再生能源，可以由动植物油脂通过酯交换反应来制备。

• the biodiesel production through transesterification reaction from tallow with methanol was studied, and koh was used as catalyst.

  该文以牛油为原料，在koh的催化作用下与甲醇酯交换反应制备生物柴油。

• in this paper the effects of composition and transesterification on morphology, structure and properties are studied in pc/pet melting blend system.

  本文研究了pc/pet熔融共混体系组分比和酯交换反应对共混物形态、结构和性能的影响。

• transesterification is one of main methods of oil modification. catalysts are used to decrease reaction temperature, accelerate reaction velocity.

  酯交换是油脂改性主要方法之一，使用催化剂可降低反应温度，加快反应速度。

• wedge-shaped and bending extended-chain crystals found in these samples indicated that chain-sliding diffusion and transesterification contributed to the growth of such polyester crystal.

  楔形伸直链晶体和弯曲伸直链晶体的存在证明链滑移扩散和酯交换反应两种机制对体系中聚酯伸直链晶体的增厚有贡献。

• the solid acid catalyst attracted much attention as the transesterification catalyst in recent research.

  固体酸性催化剂作为酯交换的催化剂是当前的研究热点。

• biodiesel is long-chain fatty-acid methyl ester in essence, which can be produced by transesterification in industry.

  生物柴油本质上是长链脂肪酸甲酯，工业上多通过酯交换反应进行生产。

• when the number-average sequence length is shorter than 7, the cold crystallization peak disappear and the melting peak disappear when the transesterification level is about 30%.

  当序列长度小于7时，冷结晶峰消失。当酯交换度大于30 %时熔融峰消失。

• reaction thermodynamics of diphenyl carbonate ( dpc) synthesis by the transesterification reaction from dimethyl carbonate and phenol is introduced.

  介绍了碳酸二甲酯与苯酚酯交换合成碳酸二苯酯的反应热力学。

• the most commonly used method is transesterification presently.

  目前，酯交换法是最普遍使用一种方法。

• bio-diesel produced by transesterification of natural oils with alcohols was an alternative fuel.

  生物柴油是由天然油脂与低碳醇酯交换生产的柴油替代燃油。

• biodiesel is a kind of clean and renewable energy, which can be produced by transesterification reaction of vegetable oils or animal fat.

  生物柴油作为一种清洁的可再生能源，可以由动植物油脂通过酯交换反应来制备。

• kgm can be modified by environmentally friendly and selective enzyme-catalyzed transesterification to form the esterified derivatives of kgm and then its applications will be extended.

  通过环境友好的、高选择性的酶催化转酯化反应引入疏水基团可以制备葡甘聚糖的酯化衍生物，从而拓宽其应用领域。

• the oil transesterification catalysts include usually used acid-base catalyst, solid base, lipase, iodine, metal complex, et al.

  油脂酯交换催化剂有：常用酸堿催化剂、酶、固体堿、碘、金属配合物等。

• results indicate that with methanol-cyclohexane as solvent, good quality biodiesel can be produced through transesterification in the process of extracting the rapeseed oil.

  结果表明，以甲醇环己烷为溶剂，在浸出菜籽油的同时进行酯交换反应制得的生物柴油效果较好。

• in this dissertation, hydrogenated rosin sucrose esters and disproportionated rosin sucrose esters were synthesized by transesterification method and o-acylation method, respectively.

  本文采用酯交换法和o—酰化法分别合成氢化松香蔗糖酯和岐化松香蔗糖酯。

• a mass of dmo in the transesterification course inhibited the disproportionation which has a small equilibrium constant. as a result, selectivity and yield of dpo were low.

  酯交换反应中由于反应物dmo的大量存在阻碍了平衡常数较小的歧化反应的进行，使得dpo选择性和收率较低。

• incorporation of the transesterification of pc and methanol with reactive extraction technique can not only increase the equilibrium conversion but also avoid the formation of dmc-methanol azeotrope.

  将反应-萃取技术应用于pc和甲醇酯交换合成dmc反应过程，既可提高反应的平衡转化率，又可避免dmc-甲醇共沸物的形成。

• in the process of preparation of biodiesel, the immiscibility of oil and alcohol leads to low transesterification rate and low production efficiency.

  在生物柴油生产过程中，由于原料油与醇不互溶，导致生物柴油生产过程中酯交换速率低，影响了生产效率。

• to determine the effection of immobilization, the selectively transesterification of 1-phenyl ethanol, with vinyl acetate as both the acyl donor and the solvent, was taken as the model reaction.

  乙酸乙烯酯作为酰基供体兼溶剂，在有机相中1-苯乙醇与乙酸乙烯酯在脂肪酶的催化下发生不可逆的转酯化反应。

• the way of how to measure the degree of transesterification is given.

  并提出了如何测定酯交换反应程度的设想。

• the variety and characteristics of solid base catalyst were summarized. and the application of solid base catalyst in the transesterification of lipid was discussed.

  综述了固体堿催化剂的种类及其特点，讨论了固体堿催化剂在油脂酯交换反应中的应用。

• the transesterification obeys a second order reaction kinetics.

  该酯交换反应遵循二级反应动力学。