Thermal decomposition

Thermolysis is a chemical reaction in which a raw material is decomposed by heating in a number of products. In contrast to the thermal decomposition ( pyrolysis = ) thermolysis is used specifically for the representation of defined products or reactive intermediates.

Supplement: In the rotary tube (pyrolysis ), however, very complex reactions take place, which differ greatly depending on the process temperature. Again, there is formation of new compounds, so that the rotary tube (pyrolysis ) at 1000 ° C is actually a rotary tube thermolysis.

Examples

• When heated, the salt ammonium chloride, so it decomposes with liberation of the gases ammonia and hydrogen chloride.

• Mercury (II ) oxide, a red crystalline solid, decomposes on heating into mercury (education silvery droplets) and oxygen.

• Blowing of marble ( calcium carbonate chemical ) is released, the gas carbon dioxide. What remains is the white, crumbly " burnt lime " (chemical calcium oxide).

• When heated dicumyl peroxide, the bond between the two oxygen atoms is cleaved homolytic and there are two Phenylalkyloxid radicals. These are used industrially as the radical initiator in the polymerization.

• Diacyl - eg dibenzoyl - are cleaved homolytic formation of two radicals.

• Upon heating of azides occur with elimination of nitrogen ( N2) nitrenes.

• When heated Diazoalkane occur with elimination of nitrogen ( N2) carbenes.