Interest to practical works carried out in various scientific centres and seeking to fabricate high-quality carbon nanotubes (NT) was essentially increased in last years. Process of formation carbon NT catalyzes by nanosized particles of transition metals. The catalyst particles are centers of carbon NT formation and growth. The first stage of this process is dissolution of carbon in metal particles then precipitation of hemosorbed carbon in form of carbon NT [1-4]. The insertion into the process the catalyst particles by several nm in size and optimum concentration enables to increase the carbon NT contents in the product of synthesis.

In our synthesis technique of NT we concentrate attention on the size and way of insertion of the catalyst in process. We used as catalyst the Fe salts, which are decomposed together with liquid hydrocarbon during synthesis at 9500C. The synthesis was carried out under Ar atmosphere. The catalyst and hydrocarbon was entered by spraying. The fabricated product contained a considerable amount of impurities (amorphous carbon, graphite particles, fullerenes, catalyst). We used various chemical methods for product purification. Amorphous carbon and graphite were oxidized of by acids (HNO3/H2SO4). The metal particles were dissolved in HCl. Benzene-soluble substances were separated by benzene washing. The intensity of purification process was raised by ultrasonic treatment and boiling. The development of effective ways of purification and separation of carbon NT is of important significance, since the properties of NT (in particular, electrical conduction) depend on their type, sizes, and quality.