CATALYST FOR DEHYDROCHLORINATION OF CARBON TETRACHLORIDE INTO CHLOROFORM Russian patent published in 2006 - IPC B01J23/42 B01J21/04 B01J37/02 C07C17/354 C07C19/04 

FIELD: industrial organic synthesis.

SUBSTANCE: invention is dealing with catalysts showing high catalytic stability in production of chloroform from carbon tetrachloride via catalytic dehydrochlorination reaction. Catalyst containing γ-alumina-supported platinum is characterized by that platinum in the form of particles 1 to 12 nm in size is distributed throughout the bulk of microspheric γ-alumina particles having median diameter 30 to 70 μm and pore volume 0.3 -0.6 cm³/g. Preparation of catalyst involves impregnation step accomplished via spraying γ-alumina with aqueous platinum compound solution used in amount equal to or less than alumina pore volume followed by platinum compound reduction step, wherein this compound is deposited onto γ-alumina with aqueous solution of formic acid or alkali metal formate.

EFFECT: achieved retention of high catalyst activity and selectivity over a long time period without being preliminarily activated.

9 cl, 2 tbl, 4 cl