a colorless crystalline compound found in unripe fruit (such as apples or tomatoes or cherries) and used mainly to make polyester resins
例句
用作名词 (n.)
A new solid acid based on heteropolyacid has been proved to be a useful catalyst for the synthesis of dibutyl maleate. 新催化剂在顺丁烯二酸二丁酯的合成反应中显示很好的活性和温和的反应条件。
Technology for maleic anhydride production and the development of catalysts are described. 摘要综述了顺丁烯二酸酐生产的工艺路线和催化剂研究发展。
Suitable anhydrides for use in this process include phthalic, maleic, and succinic. 适用于本法的酸酐有苯二甲酸,马来酸及琥珀酸的酸酐。
A new catalyst, niobic acid, was used for the synthesis of di 2 ethylhexyl maleate with yield of 86. 研究了用新型催化剂铌酸催化合成马来酸二辛酯的工艺。