苯酐渣系萘氧化或邻二甲苯氧化的副产物。
Phthalic anhydride residue is the by product from oxidation of naphthalene oro xylene.
其异构化的目的是提高对二甲苯和邻二甲苯的收率。
Its isomerization is aimed at increasing the yields of para - and ortho - xylenes.
本标准溶液以纯邻二甲苯在超净实验室中准确配制并分装于2毫升安瓿中。
This standard solution was accurately prepared in super-clean laboratory with o-xylene and sub-packed in 2ml ampoules.
随着处理温度的提高，催化剂的活性降低，对二甲苯和邻二甲苯的选择性上升。
The catalytic activity declined as the selectivity of paraxylene and ortho-xylene improved with increasing treated temperature.
以邻二甲苯为原料、苯甲酸盐为催化剂进行液相氧化，一步合成邻甲基苯甲腈。
One step synthesis of o methyl benzonitrile with o xylene as raw material and benzene carbonate as catalyst was carried out in liquid phase oxygenation.
但对邻二甲苯异构化反应，由于反应不是单纯由反应产物扩散控制，它们的对位选择性并无明显改善。
For isomerization of o-xylene the improvement in para-selectivity has not been observed, because the reaction is not mainly controlled by the diffusion of the reaction products.
采用邻二甲苯和一氧化碳为原料、无水三氯化铝为催化剂，对3，5-二甲基苯甲醛的羰基化合成反应进行了研究。
A new method related to the carbonylating synthesis of 3,5-dimethylbenzaldehyde was studied using o-xylene and CO as the raw materials and anhydrous AlCl3 as the catalyst.
再采用顶空气相色谱法检测所得苹果多酚纯化物中正己烷、苯、甲苯、对二甲苯、邻二甲苯、苯乙烯等有机溶剂残留均低于检测限。
There were not n-hexane, benzene, toluene and xylene, o-xylene, styrene and other organic solvent residue in the purification of apple polyphenol by the headspace gas chromatograph.
采用低温固相法制备了系列负载型铜、钴以及铜钴复合催化剂，用于邻二甲苯的深度催化氧化，以邻二甲苯的分解率和二氧化碳产率综合评价催化剂的活性。
A series of supported copper, cobalt and copper-cobalt composite catalysts were synthesized by solid state reaction, and used for the deep catalytic oxidation of o-xylene.
采用低温固相法制备了系列负载型铜、钴以及铜钴复合催化剂，用于邻二甲苯的深度催化氧化，以邻二甲苯的分解率和二氧化碳产率综合评价催化剂的活性。
A series of supported copper, cobalt and copper-cobalt composite catalysts were synthesized by solid state reaction, and used for the deep catalytic oxidation of o-xylene.
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