METHOD FOR ISOMERIZATION OF PARAFFIN HYDROCARBON Russian patent published in 2006 - IPC C07C5/333 

FIELD: petroleum chemistry, organic chemistry, chemical technology.

SUBSTANCE: method involves contacting the parent raw flow in the flow-type reactor with oxygen-free gas flow at increased temperature with a catalyst comprising a precious metal of VII group of the periodic system of elements. The industrial isomerization platinum-containing catalyst SI-1 or industrial hydrogenation catalyst "palladium on active aluminum oxide in sulfured form" is used as a catalyst. Contact of the parent raw with catalyst is carried out by its feeding in inert gas flow, for example, nitrogen at the volume rate 1-2 h^-1 at temperature 320-370°C in the presence of the additive representing a solution of hydroquinone or p-benzoquinone in isopropyl alcohol and taken in the concentration 0.01-0.5 mole/l wherein the additive is fed to the parent raw flow in the amount 5-30 vol.%. Invention provides carrying out the highly selective isomerization and cyclization of light petroleum fractions in on industrial Pt- and/or Pd-containing catalysts with the high yield of the end products no containing aromatic compounds and not requiring the presence of hydrogen or hydrogen-containing gas for its realization and regeneration of the catalyst.

EFFECT: improved method for isomerization.

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