Chemical reactions between concentrated products

31/03/2015

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Scope

Some products are incompatible in their concentrated state. It is therefore essential to ensure that the products are never mixed in their concentrated state.

Incompatible compounds in their concentrated state

pH regulator

The mixture of two pH regulators (pH minus and pH plus) in their concentrated state generates violent acid-base reactions:

pH minus + pH plus → Exothermal reaction + production of gaseous hydrogen

Chlorinated derivatives

Inorganic chlorinated derivatives (sodium and calcium hypochlorite) are incompatible at concentrated state with organic chlorinated derivatives (ATCC and DCCNa).

When they are mixed together in their concentrated state, two violent reactions take place:

Acid-base reaction

Inorganic chlorides (non-stabilised) are basic agents while organic chlorides (stabilised) are acidic agents. The mixture of the two in a moist environment will produce an exothermal reaction which will accelerate the decomposition of products.

Product decomposition

During the decomposition of two products, nitrogen trichloride (NC13) is produced. This gas is self-reactive and explodes immediately.

Mixture of pH regulator and chlorinated derivatives

The mixture of pH regulator products and all chlorinated derivatives in their concentrated state will cause two violent reactions.

Acid-base reaction

Acid-base reactions arising from the pH differences between the products will result in a violent increase in temperature (exothermal reaction) and will speed up the product decomposition

Product decomposition

During the decomposition of these products, gaseous chlorine is produced.

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