Patent ID: 7847142
Filing Date: 2010-12-07
Classification: C01B,C07C

Abstract:
1. A process of regenerating HF alkylation acid from a mixture comprising HF acid, water and polymer formed during an HF olefin/isoparaffin alkylation process, which comprises: stripping the mixture comprising HF acid, water, the polymer and hydrocarbons in a regeneration zone by means of a stripping fluid to form a vapor from the mixture, withdrawing vapor from the regeneration zone and completely condensing the withdrawn vapor to form from the vapor a condensed liquid component comprising HF acid and water, heating the condensed liquid component to vaporize HF acid and returning the vaporized HF acid directly to the regeneration zone to increase the concentration of the water in the remaining condensed liquid component to a value closer to the azeotropic water/HF acid value and withdrawing the condensed liquid component having the increased concentration of water.