CATALYST OF DEHYDRATION OF C-C PARAFFIN HYDROCARBONS Russian patent published in 2015 - IPC B01J21/12 B01J23/04 B01J23/26 B01J35/10 C07C5/333 

FIELD: chemistry.

SUBSTANCE: dehydration catalyst represents aluminium oxide carrier, modified with silicon oxide, on which active component chrome oxide and promoter potassium oxide are distributed. Silicon oxide is fixed on aluminium oxide in form of silicon oxide structures Si(OSi)_n(O-)_4-n, where n is from 1 to 4, in which silicon in spectrum NMR MAS ²⁹Si is characterised by presence of lines with chemical shifts from -95 to -105 ppm (line Q³) and from -107 to -124 ppm (line Q⁴) with ratio of integral intensities Q³/Q⁴ from 0.5 to 1.5, with chrome in active component being characterized in UV-Vis-spectrum of diffuse reflection by band of absorption of d-d electronic transition of octahedral Cr(III) cation with wave number from 16500 to 17000 cm^-1. Catalyst has specific surface value from 10 to 250 m²/g, volume of pores not less than 0.15 cm³/g, and its composition is formed in the following ratio, wt %: chrome oxide - 8-20, potassium oxide- 0.1-5, silicon oxide - 0.1-5, aluminium oxide carrier - the remaining part.

EFFECT: claimed catalyst of paraffin hydrocarbons possesses high activity, selectivity and thermal stability.

3 cl, 2 dwg, 1 tbl, 17 ex