HIGH PURITY ISOBUTENE PRODUCTION PROCEDURE COMBINING AN ASSOCIATED DISTILLATION TO HYDROISOMERIZATION REACTION, A DISTILLATION AND A STRUCTURED ISOMERIZATION.

摘要

THE INVENTION REFERS TO A METHOD OF PRODUCTION OF ISOBUTENO OF ELEVADA PURITY FROM A FRACTION OF HYDROCARBONS ESSENTIALLY FORMED BY OLEFINIC HYDROCARBONS OF 4 CARBON OILS BY MOLECULA AND ISOBUTEN, IN ADVANCE OF EQUIPMENT 2 - IN EQUITY 2 TO THERMODYNAMIC BALANCE; SUCH METHOD INCLUDES THE STEP OF THE MENTIONED FRACTION TO A DISTILLATION ZONE (3) ASSOCIATED WITH A HYDROISOMERIZATION REACTION ZONE; THE FUND OF THE DISTILLATION AREA CONTAINING THE BUTHENES - 2 IS TRANSITED TO A SECOND DISTILLATION AREA (4), PREFERIBLY EXTRACTIVE, THAT ALLOWS TO OBTAIN A FIRST EFFLUENT FORMED IN ITS MAJOR PART BY BUTENS - 2 AND A SECOND EFFLUENT FORMED IN ITS MOST PART BY NORMAL BUTANE; THIS FIRST EFFLUENT PASSES IN ITS MAJOR PART TO A STRUCTURAL ISOMERIZATION AREA (2) WHERE LINEAR BUTHENES ARE ISOMERIZED, AT LEAST PARTIALLY, IN ISOBUTENO; THE MAIN EFFLUENT OF THE STRUCTURAL ISOMERIZATION AREA IS RECYCLED AT LEAST TOWARDS THE ENTRY TO THE REACTIVE DISTILLATION AREA.