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CN102093225A 一种固体超强酸催化硝化制备三氟羧草醚的方法 无效 - 撤回

一种固体超强酸催化硝化制备三氟羧草醚的方法
摘要：
一种固体超强酸催化硝化制备三氟羧草醚的方法，涉及一种硝基化合物的制备方法。本发明方法为二氯乙烷中，醋酸酐存在下，3-[2-氯-4-(三氟甲基)苯氧基]苯甲酸与发烟硝酸在固体超强酸催化下，于20-80℃反应1-20h，过滤回收固体超强酸催化剂，分层，干燥，蒸溶得到产品三氟羧草醚。本发明所用的固体超强酸是一种以金属氧化物为载体的负载型超强酸，载体是三氧化二铁、二氧化钛、二氧化锆。与传统的混酸硝化相比，本发明的方法具有收率高、选择性好、产品易于分离、催化剂可重复使用及环境污染小的优点，具有工业应用前景。
摘要（英）：

The invention discloses a method for preparing acifluorfen by catalyzing and nitrifying with solid super acid and relates to a preparation method of a nitro compound. The method comprises the following steps of: reacting 3-[2-chlorine-4-(trifluoromethyl) phenoxyl] benzoic acid and fuming nitric acid under the catalysis of solid super acid for 1-20 hours at 20-80 DEG C in the presence of acetic anhydride in dichloroethane; filtering and recovering a solid super acid catalyst; and layering, drying and evaporating the solution to obtain an acifluorfen product. In the invention, the used solid super acid is a load type super acid using metallic oxides as carriers, wherein the carriers comprise iron sesquioxide, titanium dioxide and zirconium dioxide. Compared with the traditional mixed acid nitrification, the method has the advantages of high yield, good selectivity, easiness of product separation, catalyst recycling capability and low environmental pollution and has industrial application prospect.

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