In Algeria, gas condensates occupy second place after crude with respect to volume of recovery. They are exported to France, Belgium, countries of South America, and certain other countries, and are also used to produce the 85-180°C cut and diesel fuel. The 85-180°C cut is directed into a reformer for the production of high-octane reformate.Algerian gas condensates contain mixtures of paraffins and naphthenes, and also a small amount of aromatic hydrocarbons. Since these condensates have a paraffin-naphthene base, it is possible to use them as pyrolysis feedstock for the production of olefins and aromatic condensates [1, 2]. The olefin hydrocarbons serve as feedstock for the production of polymers, and the aromatic hydrocarbons as feedstock for pyrolysis -high-octane additives to premium-grade commercial gasolines At the present time, low-octane gasoline cuts are subjected to pyrolysis, as a result of which the volume of the 85-180°C cut -reformer feedstock, is reduced. The purpose of this paper is to investigate laws governing pyrolysis of the 36-279°C cut of gas condensate, and ascertain optimal conditions for the production of ethylene and propylene. Physico-chemical characteristics of this cut are presented below:

Catalysts containing amorphous aluminosilicate and crystalline zeolite phases are widely used for industrial cracking of petroleum cuts. These catalysts also exhibit high activity in cracking of individual hydrocarbons.The activity and selectivity of the amorphous aluminosilicate phase can be increased by modifying it with metal oxides, creating additional ensembles of tetrahedrons of the type (AlO 4 ⋅SiO 4 ⋅MeO 4 ) or ensembles of polyhedrons of another composition: (AlO 6 ⋅SiO 4 ⋅MeO 4 ) or (AlO 4 ⋅SiO 4 ⋅MeO 6 ) in the lattice. These ensembles are randomly positioned in the lattice, which also reflects the amorphous structure of metal silicates.In special conditions -in liquid medium (water) at high pressure, metal silicates crystallize with formation of zeolites. When incorporated in the amorphous phase, zeolites serve as active catalytic components.Cobalt or zirconium compounds which also attack the aluminosilicate structure, changing the activity and selectivity of the catalysts, can also be added to the amorphous phase. New data on the activity of metal aluminosilicate catalysts containing these compounds in a fixed amount are reported here. The catalysts were Table 1

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