Environment-friendly synthetic method for hydroxylamine salt

Abstract

The invention belongs to the field of organic chemical industry and provides an environment-friendly synthetic method for hydroxylamine salt. Aliphatic ketone, ammonia and hydrogen peroxide are adopted as raw materials and catalyzed through a nano-pore skeleton bi-metal hybrid ammoximation catalyst to prepare ketoxime in an ammoximation mode, the ketoxime directly reacts with inorganic acid in a hydrolysis mode after being desolvated and deaminized to prepare the hydroxylamine salt, aliphatic ketone can be reused, the effective utilization rate of hydrogen peroxide is larger than or equal to 97%, and the product purity is larger than or equal to 99%. The environment-friendly synthetic method for the hydroxylamine salt is suitable for large-scale industrial production.

Description

technical field

[0001] A green synthesis method of hydroxylamine salt. The invention relates to a green synthesis method of hydroxylamine salt, in particular to ammoximation and hydrolysis reactions. technical background

[0002] There are three main synthetic methods for hydroxylamine salts. The first is nitromethane and acid hydrolysis, the second is traditional acetone oximation, and the third is acid-catalyzed hydrolysis of ketoxime.

[0003] The first nitromethane acid hydrolysis method is the main method for industrial production of hydroxylamine salt. This method is as introduced by Cheng Yonggang ("Fire and Explosives", No. 4, pp. 10-12, December 1993) and Tang Zhenqiu ("Hunan Chemical Industry", No. 4, 1990) and other introductions. At first, nitromethane must be produced, and then nitromethane Hydrolyze under acidic conditions to prepare hydroxylamine hydrochloride. The preparation methods of nitromethane include natural gas method, chloroacetic acid method, hal...

Images