Patent
Preparation of dinitrodiphenyl ether
Reads0
Chats0
TLDR
In this paper, the authors used isopropyl alcohol as a solvent having a specific effect to the reaction of nitrobenzenes with caustic alkali, and obtained the highly pure title compound as crystals.Abstract:
PURPOSE:To prepare the highly pure title compound as crystals by the reaction of nitrobenzenes with caustic alkali using isopropyl alcohol as a solvent having a specific effect to the reaction.read more
Citations
More filters
Patent
Preparation method of 4,4'-dinitrodiphenyl ether
TL;DR: In this article, a preparation method of 4,4-dinitrodiphenyl ether was presented, which comprises the following steps of: adding nitrochlorobenzene, NaOH and CuI to solvents, stirring and mixing the materials uniformly and raising the temperature to 75-85 DEG C, preserving heat and stirring to react for 4-8 hours and then stopping heating and stirring, naturally cooling the reactant to the normal temperature and then filtering the reaction reactant, washing the filter cake with a NaOH solution with mass concentration being 10%
Patent
Knockout machine in forging press
TL;DR: In this article, the authors proposed a knockout machine in a forging press for carrying out knockout work with high speed and stability, and ease in adjustment of movement speed or the like of a knockout pin, which includes: knockout pins 11 provided in a forged press for forming a forging material with a pair of upper and lower molds, and in which an upper end is retractably provided from a bottom of a lower mold M; and an elevating mechanism for elevating the knockout pin 11 along axis directions thereof.