Jual EDTA

Jual EDTA 4 Na, 2 Na sebagai chelating agent, kemasan 25 kg.

EDTA CLEANING PROCESS

Chemical Cleaning of Boilers :

Pre-operative
> Maintaining steam quality at the turbine inlet.
> Minimizing corrosion of the metal surface of boiler.

Post-operative
> Improving heat transfer in the system.
> Enhancing efficiency of the power plant.
> Minimizing under deposit corrosion of the metal surface of boiler.
> Minimizing plant outage due to boiler tube failures.

What is EDTA?
EDTA or Ethylene Di-amine Tetra Acetic Acid is a strong chelating agent having ability to form stable complexes with transition metal ions  present in boiler such as of iron and copper etc.

Alkali Flushing

• Alkali Flushing 

          > Removes polar organic material such as oil, grease etc. from the metal surface
          > Alkali reacts with polar organic materials to form  soluble glycerols and salts.
          > Loose deposits, dust, etc. are also removed
          > TSP and DSP is used as alkali

• Hot Water Flushing
• Cold Water Rinse

ALKALI FLUSHING PROCEDURE

*ALKALI FLUSHING

• Alkali solution made by  adding TSP ( 01%) & DSP ( 0.05% ) with dm water.
• Solution is filled into boiler through bottom ring header & economizer drains up to NWL.
• Boiler is fired. Water temperature is raised to 140 oC and boiler tripped.
• Solution is allowed to cool till 95 oC and then drained.

* HOT WATER FLUSHING

• System is filled with DM Water and temperature raised to 1400 oC and allowed to cool to 95 oC and drained subsequently.

* COLD WATER RINSE

• System is filled with DM Water and drained. The process is repeated till phosphate level is less than 10 ppm.

EDTA Cleaning

• EDTA pickling& passivation
• Treated DM water rinsing

PREPARING EDTA SOLUTION

EDTA solution is prepared for total boiler volume by mixing

1. EDTA Ammoniated ( 40 % ).  : 4 %
2. BHEL Max ( inhibitor ).          : 0.15-0.2% w/v
3. BHEL Sol ( inhibitor )             : 0.15-0.2% w/v
4. Hydrazine Hydrate                  : 1000 ppm
5. Ammonia.                                : for setting pH as 9.5-9.8

EDTA PICKLING & PASSIVATION

• The system is filled with EDTA solution upto drum NWL.
• The boiler is lighted up and temperature raised to 140 oC and maintained for 4 hours and sample solution checked for iron, pH and EDTA concentration every 1/2 an hour.
• The boiler is tripped on achieving 3 consecutive readings of iron concentration.
• The solution is allowed to cool till 95 oC and drained.

TREATED DM WATER RINSING

• A. solution of hydrazine ( 0.01-0.02 % ) and ammonia with DM Water is prepared ( pH 9.5-9.8 ) and the system is filled with this solution.
• Boiler is fired and temperature raised to 120 oC.
• Boiler is tripped and allowed to cool. When the temperature comes down to 95 oC, the solution is drained.

SUPER HEATER BACK FLUSHING

Super heater is filled with a solution of hydrazine ( N2H4 . 50 ppm ) & Ammonia ( pH > 9.5 ) in DM Water through SH drain header. When the solution comes through SH openings in the drum, back flushing is continued for 10-30 minutes and drained.

EDTA CLEANING ADVANTAGES

EDTA is a strong chelating agent with transition metal ions and hence has an efficient action as metal remover.

Process advantages

• Use of nitrogen & its system is eliminated.
• Auxiliary steam is not required at all.
• DM Water and fuel consumption is less
• Shorter cycle tie ( 5 days ).
• Less temporary piping required
• Less number of chemicals required
• Ease of handling
• Effluent treatment easy
• Economical

Conclusion

• EDTA cleaning process ensures efficient cleaning and passivation of boiler internal surfaces.
• EDTA cleaning has obvious advantages over conventional HCL cleaning with minimum effect on the base metal surface.

Source : by HC Madan, SS Chauhan, Dhruv Garg

For any further info and query please feel free to contact us.

Stock availability :

• EDTA
• Hydrazine Hydrate
• Morpholine
• HEDP
• HCL
• Cyclohexilamine/ CHA
• others

EDTA as Chelating Agent

Chelation is a chemical combination with a metal in complexes in which the metal is part of a ring. Organic ligand is called chelator or chelating agent, the chelate is a metal complex. The larger number of ring closures to a metal atom is the more stable the compound. 

This phenomenon is called the chelate effect; it is generally attributed to an increase in the thermodynamic quantity called entropy that accompanies chelation. The stability of a chelate is also related to the number of atoms in the chelate ring. 

Monodentate ligands which have one coordinating atom like H2O or NH3 are easily broken apart by other chemical processes, whereas polydentate chelators, donating multiple binds to metal ion, provide more stable complexes. Chlorophyll, green plant pigment, is a chelate that consists of a central magnesium atom joined with four complex chelating agent (pyrrole ring). The molecular structure of the chlorophyll is similar to that of the heme bound to proteins to form hemoglobin, except that the latter contains iron(II) ion in the center of the porphyrin. Heme is an iron chelate. 

 Chelation is applied in metal complex chemistry, organic and inorganic chemistry, biochemistry, and environment protection. It is used in chemotherapeutic treatments for metal poisoning. Chelating agents offers a wide range of sequestrants to control metal ions in aqueous systems. By forming stable water soluble complexes with multivalent metal ions, chelating agents prevent undesired interaction by blocking normal reactivity of metal ions. EDTA (ethylenediamine tetraacetate) is a good example of common chelating agent which have nitrogen atoms and short chain carboxylic groups. The sodium salt of EDTA is used as an antidote for metal poisoning, an anticoagulant, and an ingredient in a variety of detergents. 

 Chelating agents are important in the field of soap, detergents, textile dyeing, water softening, metal finishing and plating, pulp and paper, enzyme deactivation, photo chemistry, and bacteriocides.

APPLICATIONS
Photography, Detergent, Chemical plating, Electroplating without cyanide, cleaning agent, plastic additives, printing of cotton and chemical fiber, industrial desulfation, inhibitor for plant growth, printing ink, medicine, paper and food industry. Water treatment chemical, Agriculture

SPECIFICATION

PROPERTY
1. EDTA : 
    Appearance       : powder
    Assay.                : 99 wt% as H4 EDTA
    Chelation Value : 3.39 mmol/g
    pH.                     : 2.5-3.0 (saturated sol.)
    Water Solubility : 0.1 wt% max at 25°C

Compare with : 
2. DTPA : 
    Appearance       : powder
    Assay.                : 99 wt% min as H5 DPTA
    Chelation Value : 2.5 mmol/g
    pH                      : 2.1-2.5 (saturated sol.)
    Water Solubility : 0.5 wt% max at 25°C



3. NTA.  : 
    Appearance       :  to off-white crystalline powder
    Assay.                : 98 wt% min as H3 NTA
    Chelation Value : 5.2 mmol/g
    pH.                     : 1.7-2.7 (1% aqueous sol.)
    Water Solubility : 0.15 wt% max at 25°C

SYNONYMS
EDTA:
Edetic acid; Ethylenedinitrilotetraacetic acid; EDTA, free base; EDTA free acid; Ethylenediamine-N,N,N',N'-tetraacetic acid; Hampene; Versene; N,N'-1,2-Ethane diylbis-(N-(carboxymethyl)glycine); ETHYLENEDIAMINE TETRA-ACETIC ACID

DTPA :
Diethylenetriaminepentaacetic acid; Diethylenetriamine-N,N,N',N',N''-pentaacetic acid; Pentetic acid; N,N-Bis(2-(bis-(carboxymethyl)amino)ethyl)-glycine; Diethylenetriamine pentaacetic acid, [[(Carboxymethyl)imino]bis(ethylenenitrilo)]-tetra-acetic acid

NTA:
N,N-bis(carboxymethyl)glycine; Triglycollamic acid; Trilone A; alpha,alpha',alpha''-trimethylaminetricarboxylic acid; Tri(carboxymethyl)amine; Aminotriacetic acid; Hampshire NTA acid; nitrilo-2,2',2''-triacetic acid; Titriplex i; Nitrilotriacetic acid  

Next Topics :
> EDTA for cleaning process
> Manfaat Kaporit bagi budidaya perikanan 

For any further info please call me

Mike
02130338599
WA 085894436642
michael@sanminglobe.com