Pyromellitic dianhydride

Pretreatment of high concentration pyromellitic dianhydride production wastewater by Fenton reagent

Fenton试剂预处理高浓度均苯四甲酸二酐生产废水的研究

Recycle of pyromellitic dianhydride from waste of production

均苯四甲酸二酐生产中废料的回收利用

Preparation of Pyromellitic Dianhydride by Gas phase Catalytic Oxidation of 1 , 2 , 4 , 5-Tetramethyl Benzene

均四甲苯气相氧化制均苯四酸二酐

The methods of collecting pyromellitic dianhydride which is low concentration from the high temperature reaction gas prepared by the gas phase catalytic oxidation of durene are introduced .

介绍了从均四甲苯固定床气相氧化法的高温反应气中捕集低浓度的均苯四甲酸二酐的各种方法。

Polymerization of m , m ′ - diaminobenzophenone and pyromellitic dianhydride by microwave radiation

m，m′-二氨基二苯酮与均苯四酸二酐的微波辐射聚合

A new ketone resin is prepared from residuum of cyclohexanone rectification and formaldehyde with compound acid as catalyst , it is modified with pyromellitic dianhydride .

以环己酮精馏残渣和甲醛为原料，用复合酸作催化剂，通过均苯四甲酸酐改性，合成一种新的酮树脂。

Through the comparison and analysis it concludes that the direct cooling collecting methods by organic solvent and water-air will be the study and development trends of technologies of collecting pyromellitic dianhydride .

通过比较、分析指出了直接冷却法中有机溶剂湿壁捕集法和水-空气捕集法是均苯四甲酸二酐捕集方法的研究和发展方向。

Above all , synthesis of TOPM from pyromellitic dianhydride and isooctyl alcohol over the solid acid SO_4 ~ ( 2 - ) / TiO_2-Al_2O_3 was studied .

首先以SO4~（2-）/TiO2-Al2O3固体酸为催化剂、均苯四甲酸二酐和异辛醇为原料合成TOPM。

The poly ( urethane-imide )( PUI ) which uses isophorone diisocyanate , dispersed red19 ( DR-19 ), and pyromellitic dianhydride is synthesized .

以异佛尔酮二异氰酸酯，分散红-19和均苯四甲酸二酐合成聚氨酯-酰亚胺（PUI）；

The article summarizes the experimental research progress and the conclusions of several heat pipe type chemical reactors . Such as ethyl benzene dehydro-genation reactor , cyclohexanol dehydro-genation reactor , pyromellitic dianhydride reactor , P_2S_5 heat pipe reactor and maleic anhydride reactor .

本文对乙苯脱氢反应器、环己醇脱氢反应器、均四苯二酸酐反应器、P2S5热管反应釜及顺酐反应器等热管式化学反应器的实验研究进展及结果进行了综述。

In this paper , the relationship of surface activity of V_2O_5-based catalysts with selectivity and activity in catalytic oxidation of durene was studied . In the catalytic reaction , pyromellitic dianhydride was prepared by catalytic vapor-phase oxidation of durene over V_2O_5-based catalysts .

以均四甲苯气相催化氧化制备均苯四甲酸二酐为研究对象，通过测定催化剂表面酸性，研究了以V2O5为基础，加入其它金属氧化物的多元组分催化剂的表面酸性与氧化选择性和活性的关系；

Using direct fast black G , pyromellitic acid dianhydride and polyaniline as raw material , the photoelectrical copolymer-polyaniline / dye interpolymer is synthesized by condensation polymerization .

以直接耐墨染料、均苯四酸酐及聚苯胺为原料，通过缩聚反应获得了感光染料／聚苯胺嵌段共聚的光电导聚苯胺分子结构。