Patent ID: 6881391
Filing Date: 2005-04-19
Classification: B01J,C10G

Abstract:
1. A method for decreasing the environmental release of halogen while regenerating catalyst particles, the method comprising: a) withdrawing a catalyst bed effluent stream comprising halogen from a catalyst bed, wherein the catalyst bed contains catalyst particles containing halogen; b) passing a first portion of the catalyst bed effluent stream comprising halogen to the catalyst bed, and at least partially regenerating at least a portion of the catalyst particles in the catalyst bed and removing at least a portion of the halogen from the catalyst particles in the catalyst bed; c) contacting a second portion of the catalyst bed effluent stream comprising halogen with adsorbent in a first adsorbent bed, removing halogen from the second portion of the catalyst bed effluent stream, and withdrawing from the first adsorbent bed a first adsorbent bed effluent stream; d) contacting an adsorbent bed inlet stream with adsorbent in a second adsorbent bed, the adsorbent in the second adsorbent bed containing halogen, removing halogen from the adsorbent in the second adsorbent bed, and withdrawing from the second adsorbent bed a second adsorbent bed effluent stream comprising halogen; e) passing at least a portion of the second adsorbent bed effluent stream comprising halogen to the catalyst bed; and f) at least intermittently moving catalyst particles through the catalyst bed by withdrawing catalyst particles from the catalyst bed and adding catalyst particles to the catalyst bed.