一锅法从卟啉配体合成μ-氧代四苯基双核铁卟啉

A novel method for synthesis of substituted u-oxo-bis[tetraphenyl porphyrinatoiron] compotmds （[TRPPFe]20） based on the reaction among free base porphyrins （TRPPH2）, FeSO4·7H2O and H2O in one pot was proposed and investigated. Four kinds of [TRPPFe]2O were synthesized by this novel synthetic method, and their structures were characterized by elemental analysis, infrared spectra and UV-vis spectroscopy. The reaction conditions, including the effect of different iron salts on the formation of [TRPPFe]2O, the reaction time between FeSO4-7H2O and TRPPH2, the molar ratio of FeSO4-7H2O/TRPPH2 as well as the volume ratio of H2O/DMF, were investigated. The [TRPPFe]2O yield of 93% 98% could be obtained under the following optimal conditions： the reaction time of FeSOn-7H2O with TRPPH2 was about 10 h, the molar ratio of FeSOn-7H2O/TRPPH2 about 5 ： 1, and the volume ratio of H2O/DMF exceeded 2 ： 1. Further research indicated that only TRPPFeCI were formed once FeSOn-7H2O was replaced by FeCl2-4H2O, the reason of which might be that halogen ions in iron salts interfered the formation of [TRPPFe]2O, suggesting that halogen ions should be avoided in this novel synthetic method.     

一锅法从卟啉配体合成μ-氧代四苯基双核铁卟啉

A novel method for synthesis of substituted μ-oxo-bis [tetraphenyl porphyrinatoiron] compounds ([TRPPFe]2O) based on the reaction among free base porphyrins (TRPPH2), FeSO4·7H2O and H2O in one pot was proposed and investigated. Four kinds of [TRPPFe]2O were synthesized by this novel synthetic method, and their structures were characterized by elemental analysis, infrared spectra and UV-vis spectroscopy. The reaction conditions, including the effect of different iron salts on the formation of [TRPPFe]2O, the reaction time between FeSO4·7H2O and TRPPH2, the molar ratio of FeSO4·7H2O/TRPPH2 as well as the volume ratio of H2O/DMF, were investigated. The [TRPPFe]2O yield of 93%-98% could be obtained under the following optimal conditions: the reaction time of FeSO4·7H2O with TRPPH2 was about 10h, the molar ratio of FeSO4·7H2O/TRPPH2 about 5:1, and the volume ratio of H2O/DMF exceeded 2:1. Further research indicated that only TRPPFeCl were formed once FeSO4·7H2O was replaced by FeCl2·4H2O, the reason of which might be that halogen ions in iron salts interfered the formation of [TRPPFe]2O, suggesting that halogen ions should be avoided in this novel synthetic method.     

储罐锥形顶盖小底角成形法

生产中,许多大型储罐的顶盖设计为锥形,其底角一般在8°~20°左右,也就是说其锥高很小,展开料包角很大、缺口部分很小。此类结构锥形盖的成形方法一般有三种:一是在卷板机上卷制成形,此方法适用于刚性较大的厚板,且顶盖形状必须是锥台(小端直径应大于卷板机辊子直径),因而此方法的应用范围受到一定的限制;二是在折弯机上折弯成形,此方法多适用于刚     

者罐锥形顶盖小底角成形法

生产中，许多大型储罐的顶盖设计为锥形，其底角一般在8°～20°左右，也就是说其锥高很小，展开料包角很大、缺口部分很小。此类结构锥形盖的成形方法一般有三种：一是在卷板机上卷制成形，此方法适用于刚性较大的厚板，且顶盖形状必须是锥台（小端直径应大于卷板机辊子直径），因而此方法的应用范围受到一定的限制；二是在折弯机上折弯成形，此方法多适用于刚性较大的厚板，顶盖形状是锥台或锥体皆可。但当锥台或锥体直径较大时，受折弯机规格限制，须分为多瓣才能实现折弯成形；三是用吊车附之倒链拉深成形，此方法适用于刚性较小的薄板，大直径、小底角、刚性较大的厚板也可，顶盖形状是锥台或锥体皆可，此方法的适用范围比较广泛。