Its isomerization is aimed at increasing the yields of para - and ortho - xylenes.
其异构化的目的是提高对二甲苯和邻二甲苯的收率。
Dinitrations occurred at two ortho-positions or both ortho- and para-positions to the hydroxy group with longer reaction time than mononitration.
随着反应时间的延长，有羟基邻位和对位双硝基化以及羟基两个邻位双硝基化产物生成。
FOR a disubstituted complex, MA4B2, the planar arrangement gives three isomers, the familiar ortho, meta, and para arrangements of organic chemistry.
对于双取代络合物ma4b2，其平面排列有三个异构体，常见的为有机化学中的邻位、间位和对位排列。
Catalytic nitration of toluene occurs by use of nitric acid in the presence of bentonite metal nitrates with useful para selectivities, up to a para to ortho ratio 1.0.
在皂土硝酸盐催化下，甲苯能被浓硝酸对位选择性硝化，对邻硝化产物比率达1．0以上。
Epithelium showed a para-orhyperparakeratosis in 17 cases, an ortho-or hyperorthokeratosis in 4 cases, unkeratinizationin 3 cases.
上皮显示不全角化或过度不全角化者17例，正角化或过度正角化者4例，无角化者3例。
In general, the distribution of ortho - and para-cortex is not bilateral in cross section of the rabbit hair.
一般在兔毛纤维横截面上正副皮质不呈双边分布。
In general, the distribution of ortho - and para-cortex is not bilateral in cross section of the rabbit hair.
一般在兔毛纤维横截面上正副皮质不呈双边分布。
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