Hydrazine Hydrate

Sewage Chemicals Treatment-40

Hydrazine Hydrate

Oxygen scavenger for high pressure boilers

No oxygen is entering the boiler with the feed water when hydrazine is present in the water ( This will help to decrease oxygen on HP, LP boiler )

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Key details

Generic name Oxygen scavenger for high pressure boilers
Active matter (%) 100
Standard packing 25.00 Kg
Available pack sizes Packed in clearly marked with contents 25, 50, 200Kgs, Hydrazine Hydrate also can be supplied in polythene lined steel drums. Drums will be palletised and shrunk wrapped on new strong wooden pallets.
Supply locations Hydrazine Hydrate supplier in Mumbai, Kolkata, Gandhidham, Chennai, Visakhapatnam, Fujairah, Dubai, Sharjah. Hydrazine Hydrate plays very important role for corrosion protection in boilers water treatment.

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Application

70

Using Procedure

<p style="text-align: justify;">
The establishment of protective metal oxide lay-ers through the use of reducing agents (such as hydrazine, hydroquinone, and other oxygen scavengers) is known as metal passivation or metal conditioning. Although "metal passivation" refers to the direct reaction of the compound with the metal oxide and "metal conditioning" more broadly refers to the promotion of a protective surface, the two terms are frequently used interchangeably.</p>
<p style="text-align: justify;">
The reaction of hydrazine and hydroquinone, which leads to the passivation of iron-based metals, proceeds according to the following reactions:</p>
<table border="0" cellpadding="3" cellspacing="0" style="color: rgb(102, 102, 102); font-family: Arial, Helvetica, san-serif; text-align: center;" width="79%">
<tbody>
<tr>
<td align="center" style="margin: 0px;" width="11%">
N<sub>2</sub>H<sub>4</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+ </td>
<td align="center" style="margin: 0px;" width="11%">
6Fe<sub>2</sub>O<sub>3</sub></td>
<td align="center" style="margin: 0px;" width="11%">
<font face="Symbol">®</font></td>
<td align="center" style="margin: 0px;" width="11%">
4Fe<sub>3</sub>O<sub>4</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+ </td>
<td align="center" style="margin: 0px;" width="11%">
2H<sub>2</sub>O </td>
<td align="center" style="margin: 0px;" width="11%">
+ </td>
<td align="center" style="margin: 0px;" width="12%">
N<sub>2</sub></td>
</tr>
<tr>
<td align="center" style="margin: 0px;" width="11%">
hydrazine </td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
hematite </td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
magnetite </td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
water </td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="12%">
nitrogen</td>
</tr>
</tbody>
</table>
<p>
 </p>
<table border="0" cellpadding="3" cellspacing="0" style="color: rgb(102, 102, 102); font-family: Arial, Helvetica, san-serif; text-align: center;" width="79%">
<tbody>
<tr>
<td align="center" style="margin: 0px;" width="11%">
C<sub>6</sub>H<sub>4</sub>(OH)<sub>2</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="11%">
3Fe<sub>2</sub>O<sub>3</sub></td>
<td align="center" style="margin: 0px;" width="11%">
<font face="Symbol">®</font></td>
<td align="center" style="margin: 0px;" width="11%">
2Fe<sub>3</sub>O<sub>4</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="11%">
C<sub>6</sub>H<sub>4</sub>O<sub>2</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="12%">
H<sub>2</sub>O</td>
</tr>
<tr>
<td align="center" style="margin: 0px;" width="11%">
hydroquinone</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
hematite</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
magnetite</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
benzoquinone</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="12%">
water</td>
</tr>
</tbody>
</table>
<p>
 </p>
<p style="font-family: Arial, Helvetica, san-serif; padding: 0px; margin: 0px 0px 10px 5px; display: inline-block; color: rgb(102, 102, 102); text-align: center;">
Similar reactions occur with copper-based metals:</p>
<table border="0" cellpadding="3" cellspacing="0" style="color: rgb(102, 102, 102); font-family: Arial, Helvetica, san-serif; text-align: center;" width="79%">
<tbody>
<tr>
<td align="center" style="margin: 0px;" width="11%">
N<sub>2</sub>H<sub>4</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="11%">
4CuO</td>
<td align="center" style="margin: 0px;" width="11%">
<font face="Symbol">®</font></td>
<td align="center" style="margin: 0px;" width="11%">
2Cu<sub>2</sub>O</td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="11%">
2H<sub>2</sub>O</td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="12%">
N<sub>2</sub></td>
</tr>
<tr>
<td align="center" style="margin: 0px;" width="11%">
hydrazine</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
cupric oxide</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
cuprous oxide</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
water</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="12%">
nitrogen</td>
</tr>
</tbody>
</table>
<p>
 </p>
<table border="0" cellpadding="3" cellspacing="0" style="color: rgb(102, 102, 102); font-family: Arial, Helvetica, san-serif; text-align: center;" width="79%">
<tbody>
<tr>
<td align="center" style="margin: 0px;" width="11%">
C<sub>6</sub>H<sub>6</sub>O<sub>2</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="11%">
2CuO</td>
<td align="center" style="margin: 0px;" width="11%">
<font face="Symbol">®</font></td>
<td align="center" style="margin: 0px;" width="11%">
Cu<sub>2</sub>O</td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="11%">
C<sub>6</sub>H<sub>4</sub>O<sub>2</sub></td>
<td align="center" style="margin: 0px;" width="11%">
+</td>
<td align="center" style="margin: 0px;" width="12%">
H<sub>2</sub>O</td>
</tr>
<tr>
<td align="center" style="margin: 0px;" width="11%">
hydroquinone</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
cupric oxide</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
cuprous oxide</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="11%">
benzoquinone</td>
<td align="center" style="margin: 0px;" width="11%">
 </td>
<td align="center" style="margin: 0px;" width="12%">
water</td>
</tr>
</tbody>
</table>
<p>
 </p>
<p style="text-align: justify;">
Magnetite and cuprous oxide form protective films on the metal surface. Because these oxides are formed under reducing conditions, removal of the dissolved oxygen from boiler feedwater and condensate promotes their formation. The effective application of oxygen scavengers indirectly leads to passivated metal surfaces and less metal oxide transport to the boiler whether or not the scavenger reacts directly with the metal surface.</p>
<p style="text-align: justify;">
<a>A significant reduction in feedwater oxygen and metal oxides can occur with proper application of oxygen scavengers.</a></p>

Technical Specifications

Physical properties 

Molecular formula: H2NNH2
CAS No.: 000302012
Molecular weight: 32.05
Description: colorless, oily liquid, fuming in air.
Odor: penetrating odor resembling that of ammonia
Density: 1.0036 (25/4°C)
Boiling point: 113.5°C (at 760 mm Hg)
Freezing point: 1.4 - 1.5°C
Explosive limits: 4.7 - 100% by volume in air
Flash point: 38 - 52°C (open cup)
Saturation concentration: 18900 ppm
Conversion factors: 1 ppm = 1.31 mg/m3
(at 760 mm and 25°C) 1 mg/m3 = 0.76 ppm
Solubility: soluble in water, ethanol, and isobutanol; insoluble in chloroform and ether
Vapor density: 1.04 (air = 1)
Vapor pressure: 14.4 mm Hg at 25°C
 
Remarks

<p style="text-align: justify;">
<span style="font-family: arial, sans-serif; font-size: small;">Hydrazine is used as an oxygen scavenger for high pressure boilers in power plants and other industries to reduce corrosion of metal pipes and fittings. Hydrazine Test Method, in which several solutions have been formulated as a Hydrazine Reagent. The method is both sensitive and easy to perform. It is used mostly for the determination of small amounts of hydrazine in boiler feedwater. </span></p>

Note

Why control balance of Hydrazine must required ?
Control of Hydarazine level in Boiler water is very important.  As proper level maintenance protect metal machinery parts from corrosion, However, precautions must be taken to prevent excess dose of hydrazine chemical as excess hydrazine will begin to decompose at temperature above 200oC to form Ammonia.

Hydrazine is one of popular an alternative Oxygen Scavenger. It is very important to protect boiler components from feed boiler water corrosion. 

Test Procedure ::: rxmarine.com/hydrazine-test-kit

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Product FAQs

FAQ
Where Hydrazine Test Kit used ?
Benefit of Hydrazine Test Kit?
Limitation of Hydrazine Dose?
Corrosion protection boiler chemicals
No oxygen is entering the boiler with the feed water when Hydrazine is present in the water.

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