GB349001A - Improvements in or relating to the fixation of ammonianitrogen - Google Patents

Abstract

The process for fixing ammonia-nitrogen described in the parent Specification is modified in that the starting material, comprising humic acids or vegetable matter, which contains or resembles humic acids, or is capable of forming humic acids under the conditions of the reaction, is heated in a wet condition under pressure to 200 DEG C. before treatment in a wet or dry condition with the ammonia and oxygen-containing gases. Alternatively, the starting material is treated first in a wet condition with the ammonia and oxygen-containing gases under pressure and then in the dry condition with the ammonia and oxygen-containing gases. It is stated in the parent Specification that the products may be used for obtaining cyanides by heating the products with alkali hydroxides or carbonates in the absence of air at temperatures above 700 DEG C.ALSO:The process for fixing ammonia-nitrogen described in the parent Specification is modified in that the starting material, comprising humic acids or vegetable matter, which contains or resembles humic acids, or is capable of forming humic acids under the conditions of the reaction, is heated in a wet condition under pressure to 200 DEG C. before treatment in a wet or dry condition with the ammonia and oxygen-containing gases. Alternatively, the starting material is treated first in a wet condition with the ammonia and oxygen-containing gases under pressure and then in the dry condition with the ammonia and oxygen-containing gases. It is stated in the parent Specification that the products may be used for fertilizing purposes, for case-hardening ferrous metals and for obtaining cyanides by heating the products with alkali hydroxides or carbonates in the absence of air at temperatures above 700 DEG C.ALSO:The process for fixing ammonia-nitrogen described in the parent Specification is modified in that the starting material, comprising humic acids or vegetable matter which contains or resembles humic acids, or is capable of forming humic acids under the conditions of the reaction, is heated in a wet condition under pressure to 200 DEG C. before treatment in a wet or dry condition with the ammonia and oxygen-containing gases. Alternatively, the starting material is treated first in a wet condition with the ammonia and oxygen-containing gases under pressure and then in the dry condition with the ammonia and oxygen-containing gases. It is stated in the parent Specification that the products may be used for case-hardening ferrous metals.