a white cyclic anhydride

based on the faults occurring in the turbine fan set of a phthalic anhydride plant, some efficient methods were proposed to ensure the safe operation of the plant.

针对苯酐装置中透平风机机组多次出现的故障采取了有效的处理办法，确保了装置的安全运行。

based on reaction kinetics, the process flow diagram of continuous esterification and reaction conditions were set. the conversion of phthalic anhydride was over 99.8%.

应用酯化反应动力学，确定了连续酯化的流程及操作条件，苯酐的转化率达到99.8%以上。

using isophthalic acid produces alkyd resin instead phthalic anhydride. paint produced by phthalic anhydride has high equilibrium, especially in paint film's drying and mechanical strength.

采用间苯二甲酸代替苯酐合成醇酸树脂，用该类型的树脂制备的涂料在性能上有极大提高，特别是涂膜的干性、机械强度改进明显。

the kinetics of polyesterification of phthalic anhydride with diethylene glycol was investigated.

对邻苯二甲酸酐和二甘醇的聚酯化动力学进行了研究。

the market demand, price and development trend of world phthalic anhydride are reviewed.

介绍了国内外苯酐的市场需求和价格情况以及发展趋势。

sc-nc-196sp is phthalic anhydride diols and standards as the main raw materials for food-grade resin lining winding, medium viscosity and reactivity, after curing with excellent mechanical properties.

sc-196sp-nc是以邻苯二甲酸酐和标準二元醇为主要原料的食品级缠绕内衬树脂，具有中等粘度和反应活性，固化后具有优良的机械性能。

any of a group of chemical compounds formed by a reaction of phthalic anhydride with a phenol from which certain synthetic dyes are derived.

酞一组化合物之一，由邻苯二甲酸酐和酚反应而成，某些合成染料是由此提取的。

it is discussed the new method bdp of synthesizing by using catalytic agent doox and material phthalic anhydride and normal butanol .

本文论述了以功能树脂doox为催化剂，邻苯二甲酸酐和正丁醇为原料合成邻苯二甲酸二丁酯的新方法。

the research, development situation and technology keys of the catalyst for preparing phthalic anhydride by oxidation of o -xylene were introduced.

介绍了邻二甲苯氧化法制苯酐用催化剂的研究情况、发展概况和开发过程中的技术关键。

the catalyst had high activity and high selectivity in esterification of phthalic anhydride with isoamyl alcohol.

该催化剂对邻苯二甲酸酐和异戊醇的酯化活性高 ，无副反应。

with the rapid development of related trades, the demand of markets for phthalic anhydride growths more rapidly.

随着相关行业的快速发展，市场对苯酐的需求量增长较快。

phthalic anhydride residue is the by product from oxidation of naphthalene oro xylene.

苯酐渣系萘氧化或邻二甲苯氧化的副产物。

after dehydration and distillation, the fusel oil is reacted with phthalic anhydride to synthesis phthalic mixed ester by strong acidic canon ion excharge resin as catalyst.

以糖厂、酒精厂副产物杂醇油为原料醇，经脱水及简单蒸馏后，在强酸树脂的催化作用下与邻苯二甲酸酐反应，合成了外观为浅黄色透明的邻苯二甲酸混合酯。

the catalysis effect of some catalysts on the synthesis of unsaturated polyester of phthalic anhydride type was studied.

本文研究了几种催化剂对合成邻苯二甲酸酐型不饱和聚酯的催化作用。

na was used in synthesizing na up resin to partly replace phthalic anhydride which was usually used in synthesizing ordinary unsaturated polyester resin.

以na、邻苯二甲酸酐、马来酸酐和乙二醇为原料，合成了新型不饱和聚酯树脂（naup树脂） 。

the condensation reaction takes place between the two hydroxyl of phthalic acid, and the phthalic acid be converted into phthalic anhydride finally.

邻苯二甲酸的两个羧基上的羟基会发生缩水反应，最终生成邻苯二甲酸酐。

the invention relates to a novel synthesizing method for 4-phenylacetylene phthalic anhydride, which directly uses 4-bromine phthalic anhydride as a raw material.

本发明公开了一种4-苯乙炔邻苯二甲酸酐的新型合成方法。