Physical And Chemical Properties

CAS Number: 497-18-7

Appearance: white crystalline powder

Density: 1.616

Melting Point: 153-154°C (decomposes when melted)

Very soluble in water, almost insoluble in common organic solvents, slightly soluble in DMF and DMSO, PH value of 1% aqueous solution with a mass fraction of 7.4;

Chemical Properties

Pyrolysis carbohydrazide will decompose at the melting point; acid-alkaline carbohydrazide is a diacid, the aqueous solution is weakly alkaline, PH: 7.4; hydrolysis reaction Carbohydrazide is unstable in acidic and alkaline solutions, will decompose into Hydrazine

The Main Purpose

Carbon hydrazide is used as a deoxidizer for boiler water. It is the most advanced material used for deoxidizing boiler water in the world today. It has low toxicity, high melting point, and deoxidation efficiency much greater than the materials currently used. It is an ideal product for safety and environmental protection. Widely used in steel mills, power plants, oil refineries, etc.

Dosage

Use method of boiler deoxidizer: When carbohydrazide is used as boiler deoxidizer, carbohydrazide can be put into water, or its aqueous solution can also be used. The amount of carbon hydrazide for 1 mol of oxygen is 0.5 mol, and an appropriate excess. The best applicable temperature range is: 60-176.7℃. The timing of using carbohydrazide is after thermal deoxygenation. The reaction between carbohydrazide and oxygen is as follows: CON4H6+2O2=2N2+3H2O+CO2, because CO2 dissolves in water to form carbonic acid, which is weakly acidic and has certain corrosion to the boiler. It is recommended to appropriately add carbohydrazide in excess and the solution is weakly alkaline. Neutralize and adjust PH, and it can passivate the metal of the boiler, further protect the metal from corrosion.

Carbon Hydrazide As A Boiler Deoxidizer:

(1) At the same water temperature, the greater the excess amount of oxygen scavenger in water, the faster and more complete the chemical reaction;

(2) Under the same dosage, the higher the water temperature, the better the deoxygenation effect;

(3) Under the same deoxygenation effect, the higher the water temperature, the smaller the deoxygenation dosage;

The dose G of the oxygen scavenger can be calculated as follows: G=8[O2]+β;

Among them, oxygen content in O2-water, mg/L; excess amount of β-oxygen remover, mg/L, usually 10-15;

The general dosage is 40-50mg/L. Use the orifice plate type, membrane type dosing device or use a piston water pump to add to the water supply pipeline in front of the water supply pump.

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