Sodium dicyanamide

Chemical Properties

White to off-white powder

Uses

Sodium dicyanamide is used or the production of pharmaceuticals (e.g. chlorhexidine, biguanide, proguanil and alexidine). Product Data Sheet

Uses

Reactant for preparation of:

• Nickel diacetylpyridine dioximate pentanuclear, octanuclear and decanuclear cluster complexes
• Decanuclear manganese(II/III) oxo azide diolate clusters as supertetrahedral building-blocks to design extended magnetic networks
• Ruthenium bipyridine complexes entrapped in iron and manganese dicyanamide two-dimensional anionic sheet-like coordination polymeric networks exhibiting dual emission photoluminescence
• Lead dicyanamide-bridged nitronyl nitroxide radical polymeric complex
• Antiferromagnetically coupled hexanuclear copper(II) Schiff base complexes with dicyanamido bridges
• CuII2L based polymeric ladders using dicyanamide bridges
• Luminous hexacoordinated coordination polymers of cadmium(II), containing dicyanamide bridges

General Description

Sodium dicyanamide (NaDCA) is a white to off-white powder.It was used as a leaching reagent for gold recovery and can form a new catalyst system for benzene liquid hydrogenation to cyclohexene[1-2].

Synthesis

Step 1, ammonia and cyanogen halide are mixed in a pre-reactor at a temperature of 0-20C, and the reaction yields a mixture material, and the pH value of said mixture material is 6-9;

Step 2, a reactor is provided, and said reactor is set up with an interconnected reactor kettle, a condensing tube reactor, and a storage tank of liquid alkali, and said mixture material is transported to the reactor kettle of the reactor, where the The temperature of the mixture material is in the range of 0-50C;

Step 3, pumping said mixture material, sodium hydroxide solution into said condenser tube reactor, adjusting the pH value of said mixture material to be 7-10, and at the same time passing cyanogen halide into said condenser tube reactor for reaction, the reaction liquid is returned to said reactor after passing through said condenser tube reactor, and when the pH value of the reaction liquid stabilized at 7.5-10, said circulating material is subjected to the next step: decolorization, crystal precipitation, and washing;

Step 4. Repeat the circulating reaction step of step 3 to prepare sodium dicyandiamide.

References

[1] Li G, et al. Gold-leaching performance and mechanism of sodium dicyanamide. International Journal of Minerals, Metallurgy and Materials, 2021; 28: 1759–1768.
[2] Schwab F, et al. Simple selective hydrogenation of benzene to cyclohexene in the presence of sodium dicyanamide. Green Chemistry, 2013; 15: 646-649.