| Autor: |
Ukharskii, A. A., Kadushin, A. A., Al'tshuler, O. V., Tsitovskaya, I. L. |
| Zdroj: |
Russian Chemical Bulletin; April 1975, Vol. 24 Issue: 4 p688-691, 4p |
| Abstrakt: |
1.Spectral investigations using a closed method showed the existence of a strong adsorption of cyclohexane (CH) on NaY zeolite in the precatalytic temperature region.2.In the case of passage of a mixture of C6H12+O2, NaY zeolite is characterized by the appearance of the absorption bands 1720, 1780, and 1820 cm-1, corresponding to carbonyl-containing and peroxide compounds, at 60–80°. In the case of partial replacement of the Na+ ion by Cu2+, the formation of these compounds is not recorded up to 180°.3.The process of oxidation of CH on zeolites is of a heterogeneous — homogeneous character. The transition of the reaction into the volume occurs in the case of sodium zeolite at~120°, and in the case of copper — sodium zeolite at 220°.4.A fluctuating system of the reaction of oxidation of CH on NaY zeolite is of an autocatalytic character and is associated with the periodic accumulation of peroxide-type compounds on the surface of the zeolites. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink