Question

Discuss a number of waste removal/ disposal methods for chlorinated hydrocarbon solvents in the petrochemical industry

Answer 1

Waste Organic Solvents are separated into Chlorinated and Non-Chlorinated Solvent waste.

Chlorinated Hydrocarbon Solvent wastes in the petrochemical industry are generated in the following type of plants:

a)Acetone

b)Vinyl Choride

c)Hydrochloric Acid

d)Acetaldehyde

e)Carbon Tetrachloride

d)Chloroprene

In the production of these products chlorine reacts with organic chemicals such as acetylene, benzene, ethyle methane or toluene to make intermediates that can be used in paints, plastic, synthetic rubber,herbicide dry cleaning agents, soaps and the like.

In producing intermediate chemicals, however, side reaction take place during chlorination. Since the products of the side-reactions are undesirable impurities in the customer's final product, they must be removed.

In former days, such waste in limited amounts could be easily disposed of by incineration, used for land reclamation, or discarded in the sea. But now a days it is the responsibility of industry to remove hazardeous wastes by following certain processes/methods.

These are some waste removal / disposal methods in Chemical industries.

1).Nittetu / Thermal Process by using thermal vertex burner

2).Exaust Gas Treatment

3).Incineration of Chlorinated Hydrocarbon waste by Neutralization Method

In most advanced technology procesess chlorine is recovered apart from disposal by following these techniques.

4) Absorption Method to recover HCl

5) Recovery of HCl by Extractive Distillation methods.