A process for the preparation of alkylation catalyst from natural kaolinitic clay

摘要

A process for the preparation of alkylation catalyst fromnatural kaolinitic clay which comprises purifying the run-off mine clay for separating the coarse minerals by sedimentation followed by wet sieving, drying the bulk clay fraction of size 45µ at a temperature in trie range of 90- 110°C for a period of 10 to 20 hours, calcining the resultant clay at a temperature in the range of 300-600°C for 5-10 h. grinding the calcined clay by known methods, activating the calcined clay by treating with 0:1-6 M mineral acid for 0.25-8 h, filtering the slurry and washing the resultant product repeatedly with water till free from chloride ions, drying the residue obtained at a temperature of 90-110°C for 10-20 h, grinding the resullnat acid treated clay, calcining the treated clay obtained at a temperature in the range of 300- 600°C for 3-6 h and then cooling to room temperature, incorporating at least one active element selected from the metals of group V-VIII in the form of their compound as herein described to the acid treated clay and drying the product at 100-150"C for 10-20 h to obtain alkylation catalyst.