以下为句子列表：
英文: A mixture of formic acid and acetic anhydride was found to be effective for the formation of an oxazolone, which was converted to an active ester in situ in the presence of a phenol or an N-hydroxide.
中文: 实验发现甲酸和醋酐混合物对恶唑酮的生成非常有效，恶唑酮在苯酚或N-氢氧化物存在的条件下在原位转化为酯。
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英文: A new high corrosion resistant Zn-base coating was prepared with flake zinc powder、aluminum powder、chromic (acid) anhydride and some other organic matters, it possessed good combination force and excellent corrosion resistance.
中文: 摘要利用片状锌粉、铝粉、铬酐及其它有机物配制的新型高耐蚀锌基涂料具有良好的结合力和耐蚀性。
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英文: A process approaching 3-and 4-chlorophthalic anhydride in high purity via chloriation of o-xylene, oxidation of monochloro-o-xylene by air in gas phase, and separation of 3-and 4-chlorophthalic anhydride afterwards by distillation is described.
中文: 摘要介绍由邻二甲苯氯代，再经空气氧化及异构体分离合成氯代苯酐中试规模的合成路线。
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英文: A variety of aldehydes were converted into acylals in good yields with anhydride in the presence of a catalytic amount of zinc bromide under solvent-free conditions.
中文: 以醛和酸酐为原料，溴化锌为催化剂，无溶剂条件下高产率地合成了偕二酸酯（其中醛与苯甲酸酐的反应是首次报道）。
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英文: Abstract: The preparation conditions of unsaturated polyester (UP) resins modified by PET were introduced in this paper.The copolymerization mechanisms of the synthesis of UP resins from cis-and trans-anhydride were researched.The relationship between the
中文: 文摘:本文研究了由聚酯改性合成不饱和聚酯树脂的反应机理和工艺条件，讨论了改性树脂反应活性与不饱和酸结构之间的关系，解释了顺、反式双键结构对改性树脂固化放热特性和反应活性不同的原因。
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