Chemtex Speciality Limited

Hydrazine hydrate and its derivatives play a significant role in various applications that contribute to ensure comfort, safety and healthcare in our everyday life. Here we discuss the use of Hydrazine Hydrate as Oxygen Scavenger in Boiler water treatment. Hydrazine Hydrate is a clear colorless liquid. It generally comprises of a 80% assay product, that is used for removing dissolved oxygen in boiler treatment.

Key Features and Benefits:

• Removes dissolved oxygen
• Prevents oxidation corrosion
• Causes mild steel passivation
• Does not add to TDS of boiler water
• Completely volatile

Application and Dosage:

• Hydrazine Hydrate is dosed in the aerator of the boiler at the recommended dosage that is prescribed after analysis of dissolved oxygen in the water and other system parameters.
• Please refer your CSL representative to recommend exact dosage.

DEHA is a volatile catalyzed oxygen scavenger cum condensate line treatment chemical. It is based on DEHA catalyzed with hydroquinones. DEHA reacts with oxygen to form acetates, nitrogen and water. It passivates the metal surfaces in the boiler, and then passes out of the boiler with the steam, and act as a metal passivating agent in the return line system.

Key Features and Benefits:

• Completely organic compound
• Volatile - Does not add TDS to blow down water
• Metal passivator and rust converter
• Effective condensate line treatment and pH booster
• Non-toxic and more safe than hydrazine and carbohydrazide based chemicals
• Compatible with other treatment chemicals
• Returns to the feed line with the condensate return so passivates total system
• High rate of reaction with oxygen compared with other oxygen scavengers
• It offers a vapor-liquid distribution ratio of 1.3 and thus distributes all along the condensate circuit, ensuring a total control of corrosion
• Single treatment for total corrosion control in boiler

Application and Dosage:

Chemtex’s Deha is fed neat (undiluted) continuously to the boiler feed water depending upon the dissolved oxygen content, temperature and pressure of boiler. Theoretically the dosage is 1.3 parts active ingredient for every part of oxygen, but in application, a dosage of 3ppm active for every ppm of O2 is recommended.

Carbohydrazide Chemical in both powder and liquid form finds use oxygen scavenging in boilers to prevent oxidative corrosion. Carbohydrazide is a very effective boiler oxygen scavenger in powdery form, as a formulation. It is used to scavenge even the last traces of DO (Dissolved Oxygen) from the boiler feed water. It prevents corrosion by forming a protective passive film on metal and boosting pH in condensate line. It is highly soluble in water and insoluble in organic solvents.

Carbohydrazide replaces the conventional Hydrazine by overcoming the hazardous carcinogenic effects of hydrazine. Its reducing properties for metal oxides, such as converting ferric oxide to ferrous oxide and cupric oxide to cuprous oxide, finding use in metal passivation.

Key Features and Benefits:

• Long time protection and control against corrosion
• Non carcinogenic nature
• Easy to dose
• Promotes passivation on metal surfaces
• Non residual

Additional Information:

• Packaging Details: 25kgs PP bags

Chemtex’s Powder Antiscalant and Oxygen Scavenger is a blend of powder antiscalant and catalyzed oxygen scavenger, designed for boiler water treatment used in coil type boilers. The antiscalant inhibits deposition of calcium and iron scales on coils.

Key Features and Benefits:

• Catalyzed Oxygen Scavenger for instant oxygen removal
• Minimizer or eliminates oxidation corrosion (corrosion due to presence of oxygen)
• Concentrated powder product
• Prevents scaling and thus overheating of coil
• Imparts power saving

Application and Dosage:

• Chemtex’s Powder Antiscalant And Oxygen Scavenger is dosed at the rate of 15 to 100gms per ton of steam generation, depending upon the feed water temperature and type of boiler system.
• Please refer to your CSL service engineer for exact product dosage.

Chemtex’s Powder Antiscalant is a unique antiscalant in powder form that prevents water scale deposition in boilers, cooling water system, evaporative condensers and d.m. water plant. It is a non-toxic chemical formulation and can be used in the potable water system for scale prevention in pipework, equipment and vessels.  Chemtex’s Powder Antiscalant also functions as an alkalinity / pH booster for potable water.

Key Features and Benefits:

• Effective scale control
• Dual function anti-scaling and pH booster
• Powder concentrate
• Economical

Application and Dosage:
Chemtex’s Powder Antiscalant is a powder compound and should be dosed to the system after making a saturated solution. Ideal dosage range is between 50-500ppm depending upon the type of application, water quality and system parameters.

Morpholine Chemical is an organic amine used for boiler water treatment. It increases the pH of boiler water to protect boiler against corrosion.

Morpholine Chemical is an amine-based formulation and does not add salt to the boiler water and thereby does not increase the TDS which results in reduced blow down and fuel savings.

Morpholine can be used in all type, size and pressure of boilers.

Key Features and Benefits

• Prevents stress cracking corrosion
• Does not add TDS
• Reduces blow down requirement
• Saves power
• Compatible with other treatment chemicals
• Returns to the feed line with the condensate return so raises the feed water pH

Chemtex’s Boiler Oxygen Scavenger is a catalyzed oxygen scavenger in liquid form based on catalyzed sodium bisulfite. It helps to instantly remove oxygen from the boiler feed water by converting itself to sodium bisulfate and also reduces alkalinity.

Key Features and Benefits:

• Catalyzed Oxygen Scavenger for instant oxygen removal
• Minimizer or eliminates oxidation corrosion (corrosion due to presence of oxygen)
• Concentrated powder product
• Buffers pH
• Imparts power saving

Application and Dosage:

Chemtex’s Boiler Oxygen Scavenger should be dissolved with water in a separate tank with slow agitation and dosed continuously to the boiler feed water line after the deaerator. For every 1 ppm of dissolved oxygen, 24ppm of Chemtex’s Boiler Oxygen Scavenger should be ideally dosed. However, the dosage varies with feed water temperature, for exact dosage refers the below table:-

Chemtex's Boiler Antiscalant includes Powder Antiscalant, Boiler Sludge Conditioner, Sludge Remover, Boiler Water Phosphate Treatment, Phosphate Polymer Treatment, Sodium Tri poly Phosphate etc. These are all online boiler internal tubes treatment compound based on polymeric dispersants for sludge conditioning, poly-phosphates and polymers for scale and corrosion inhibition. It imparts excellent online cleanliness of boiler internals by preventing scale, metal ions and metal oxide deposits formation Chemtex's Boiler Antiscalant helps to prevent deposition of calcium, iron and iron-oxide. It also aids in removal of existing scale from the water boiler. The optimum balances of products enable complete boiler online cleaning. Chemtex's Boiler Antiscalant contains corrosion inhibitor which forms a protective passive film over the boiler heat transfer surface. The inhibitor prevents fouling due to Iron Hydroxides, pitting and tube failures.

Neutralising Amines are concentrated liquid agents developed with highly advanced superior technology used for controlling pH in steam lines. It is specifically designed for high decomposition temperature, enabling to maintain of pH even at a high temperature at a specified range. Mainly corrosion forms in this unit due to the thermal decomposition of the natural alkalinity in the boiler water. Neutralizing amine are volatile compounds that control corrosion by neutralizing the corrosive carbonic acid and helps to enhance pH. 
Features & Benefits:

• Prevent carbon di oxide corrosion
• Completely Volatile
• Neutralizes the acids occurring in the condensate system
• Maintains pH
• Stability at high temperatures
• Easy to use

Cyclohexylamine is primarily used for low-pressure boilers where the condensate has a long run. It has the ability to stay with condensate steam for longer runs and at various steam pressures which is not a characteristic of other neutralizing amines available. In case the amine requirement is high then there is possibility of amine carbonate deposit formation.

In this case, it is recommended that a blend of other amines be used with Cyclohexylamine for the long run and the low pressure benefits while preventing carbonate deposition.

Key Features and Benefits

• Condensate line treatment
• Prevent of carbon dioxide corrosion
• Prevents formation of carbonic acid in boiler steam system
• Does not add to TDS of boiler water
• Completely volatile