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Water Chlorination
Cyanide Neutralization
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Dairy-SHC
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Cyanide Neutralization

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Cyanide Neutralization

Our company is the leading manufacturer and supplier of Cyanide Neutralization Chemicals. Cyanides are toxic to aquatic life, interference with normal biological processes of natural purification in streams, present a hazard to agricultural uses of water and are a menace to public water supplies and bathing. It exerts a toxic action on living organisms, animals and human beings by reducing or eliminating the utilization of oxygen in a manner similar to asphyxiation.

The action at the toxic level is both rapid and fatal. "Cyanochlor" a cyanide neutralizer manufactured our company is a chlorine compound, which contains a fixed amount of available chlorine and it is in stable form. It is a pale greenish yellow liquid with chlorinous adore and alkaline in nature which brings about the cyanide effluent destruction at a very fast rate. It also has an additive added to bring about the destruction of cyanide at a faster rate.

Occurrence
Cyanide compounds are widely used in industry, five processes are responsible for most of the cyanide wastes causing stream pollution and presenting problem in waste treatment plant operation. These processes are metal plating case hardening of steel, neutralization of acid pickle scum refining of gold and silver ores, scrubbing of stack gases from blast and produces gas furnaces.

Process
The cyanide effluent waste emanating from various sources contains different qualities of free cyanide. After ascertaining the cyanide content in the effluent and based on the dosage data given below "Cyanochlor" should be gradually dosed into the effluent treatment tank continuously. Before injecting "Cyanochlor". it is necessary that the PH adjustment can be done by adding requisite quantity of Sodium Hydroxide solution. The PH of the effluent solution be adjusted to 10. Aeration in the process gives an additional advantage in quick destruction of cyanide. The destruction of cyanide is achieved as shown by the following reaction.


2NaCN + 5 NaOCL + 2NaOH………………………..2Na2C03 + 5 NaCL + N2 + H20

Control and Operating Conditions
  • The PH of the effluent to be treated must be adjusted to 10 before dosage of "Cyanochlor"

  • The treatment should be carried out below 30 c

  • Aeration and or mixing in the process is desirable. Aeration gives an additional advantages in quick destruction of cyanide

  • After addition of "Cyanochlor" to the effluent a retention time of one hour is to be given for complete destruction of cyanide


Precaution
  • If the effluent solution is acidic or slightly alkaline, it will lead to evolution of cyanogen chloride gas. HCN gas and chlorine gas. These are extremely toxic gases and very dangerous to living beings and human beings.


  • The temperature of the effluent treatment solution should not be exceed 30e. At the higher temperature and lower PH less than 10 or so toxic gases like CI2 are evolved with cyanogen chloride.


  • "Cyanochlor" may be harmful, if swallowed undiluted or on eyes may cause irritation if splashed, swallowed feed milk. If splashed on eyes flood eyes with water or on skin wash off with water and call physician.


Dosage
The following dosage recommended is arrived on the basis of certificate issued by Richardson & Cruddas 1972 Ltd (A Government of India Undertaking) Public Health Engineering. Department who have analyzed in their laboratory for cyanide amenable for chlorination. This certified document is enclosed.

Volume of Effluent Water Cyanide Content in PPM "Cyanochlor" Required


VOLUME OF EFFLUENT WATER CYANIDE CONTENT IN PPM "CYANOCHLOR" REQ
1000 10 1.2
1000 20 2.4
1000 30 3.6

The above dosage is based on the certificate enclosed. However while applying for practical use in your works you may either increase or decrease the dosage based on the residual chlorine test in the treated waste.

Advantages
  • The destruction of cyanide is total and well within a very short period of 2 hours.

  • The end product of the treatment are C02 and N02 which are absolutely harmless.

  • Final cyanide level is brought down to 0.05-0.1 mg/it.

  • Handling of "CYANOCHLOR" is extremely ease and toxicity is very low.

  • There is no evolution of any toxic and harmful gases.

  • There is no rise of temperature on addition of "CYANOCHLOR".

  • Since there no evolution of either cyanogen chloride or chlorine gas, the process is extremely safe.


Treatment of Cyanide Effluent with Ferrous Sulphate: This method is always associated with the formation of dark blue sludge. This treatment practice has not been widely recommended because of questionable efficiency of the process and permanency of result, large volume of sludge produced and pronounced odour of the sludge and the effluent. In presence of intense sunlight, the Ferocyanides (formed by the reaction of ferrous hydroxide with cyanide) get converted into cyanide.

Treatment of Cyanide Effluent with Bleaching Powder: The above method has a disadvantage because bleaching powder usage produces large amount of sludge and there are chances of unneutralized cyanide being drained with the solid sludge.

Treatment of Cyanide Effluent with Chlorine Cylinder: The above method requires strict operating conditions since it is beset with unexpected hazards of chlorine leakage from the chlorine toners which is deadlier than cyanide effluent. Also usage of chlorine requires the addition of caustic, hydrochloric acid which addition can be to a certain extent minimized by using of our product.





     

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