Abstract: The invention provides a process for the production of crystalline ammonium sulfate, wherein the process comprises performing a Beckmann rearrangement reaction, neutralizing the Beckmann rearrangement reaction mixture, separating a first aqueous ammonium sulfate phase and an aqueous ?-caprolactam phase, charging the first ammonium sulfate phase to a first evaporative type crystallization section wherein crystalline ammonium sulfate is obtained, discharging from the first evaporative type crystallization section mother liquor enriched in organic components, extracting the aqueous ?-caprolactam phase to obtain an extracted ?-caprolactam phase and a second aqueous ammonium sulfate phase, discharging the mother liquor that is discharged from the first evaporative type crystallization section and/or the second aqueous ammonium sulfate phase to a second evaporative type crystallization section wherein evaporative type crystallization is performed so that a three-phase system occurs.

Abstract: Process and equipment for the continuous production of hydroxyl ammonium by reduction of nitrate ions or nitrogen oxides with hydrogen in the presence of a catalyst whereby the hydroxyl ammonium is produced in 2 or more parallel placed hydroxyl ammonium production units which process is optionally part of a process for the production of cyclohexanone oxime in which an inorganic process liquid is cycled from a hydroxyl ammonium synthesis zone (A) to a cyclohexanone oxime synthesis zone (B) and back to the hydroxyl ammonium synthesis zone for example through an extraction zone (C) and a nitric acid production zone (D), in which hydroxyl ammonium synthesis zone hydroxyl ammonium is formed by reduction of nitrate ions or nitrogen oxides with hydrogen in the presence of a catalyst, and in which cyclohexanone oxime synthesis zone hydroxyl ammonium is reacted with cyclohexanone to form cyclohexanone oxime.

Abstract: The invention relates to a process for preparing succinonitrile by contacting acrylonitrile (ACN) with hydrocyanic acid (HCN) in a reactor in the presence of a tertiary amine. The invention also relates to the use of succinonitrile prepared according to the process of the invention, for preparing diaminobutane. Succinonitrile is prepared by contacting ACN with HCN in the presence of a tertiary amine and a compound chosen from the group consisting of water, aliphatic alcohols, aromatic alcohols, carboxylic acids and mixtures thereof.