Stabilizing agent of liquid single-cyandiamide and method for producing stable liquid single-cyandiamide

Abstract

The invention belongs to the field of chemical engineering, and particularly relates to a stabilizer for liquid cyanamide and a method for preparing stable liquid cyanamide. The stabilizer for liquid cyanamide can be acetic acid or metacetonic acid. The method for preparing stable liquid cyanamide comprises steps as follows: liquid cyanamide is put into a container with a stirring device; the stabilizer with the liquid cyanamide weight 0.01-5.0% is added slowly in stirring; the temperature of the liquid cyanamide in the container is controlled to be the natural environmental temperature; and the liquid cyanamide with stable performance is obtained. A large amount of experiments show that proper acetic acid or metacetonic acid is added into liquid cyanamide to be the stabilizer, so that liquid cyanamide can be in a very stable state at the natural environmental temperature, all of the physicochemical properties of liquid cyanamide are kept, and the long-term problems of storage and transportation of liquid cyanamide at the natural environmental temperature are solved.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a stabilizer for liquid cyanamide and a method for preparing stable liquid cyanamide. Background technique [0002] Cyanamide, also known as cyanamide and cyanamide, is a weak acid, but it is a very flexible compound, and it is a colorless, deliquescent, orthorhombic crystal. It has a large solubility in polar organic solvents, a small amount in non-polar solvents, and a large solubility in water. There is a cyano group and an amino group in the cyanamide molecule, which can react with a series of compounds. These reactions can be mainly divided into two categories: one is the addition reaction with the cyano group, and the other is the substitution reaction with the amino group. In aqueous solutions, these reactions depend on the pH and temperature of the medium. [0003] Polymerization reaction is one of the important reactions of cyanamide. During the storage process, cyan...

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Problems solved by technology

In order to prevent the dimerization reaction during storage and transportation, acid stabilizers must be added. At present, the stabilizers generally added are mainly phosphoric acid, formic acid, sodium dihydrogen phosphate, etc., and these stabilizers can achieve a certain stabilizing effect, but still It cannot achieve the purpose of storing and transporting liquid cyanamide at natural ambient temperature, and must be stored and transported below 10°C

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