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。
Thixotropic resin based on ortho-phthalic acid.
触变型，邻苯型基体的不饱和聚酯树脂。
Thixotropic resin based on ortho-phthalic acid.
触变型，邻苯型基体的不饱和聚酯树脂。
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