Patent ID: 6852361
Filing Date: 2005-02-08
Classification: B01J,C10G,C23C

Abstract:
1. A method of on-line coating a continuous coat film on inner wall of the reaction tube in a hydrocarbon pyrolysis reactor for preventing the formation and deposit of cokes on the inner wall, comprising the steps of: vapor depositing a mixed solution of a first metal alkoxide and a chromium compound on the inner wall, concurrently with introducing a first carrier into the reaction tubes at a flow rate of 1-5000 kg/hr/coil at a temperature of 600-900° C. under a pressure of 0-3 kg/cm vapor depositing a diffusion barrier consisting essentially of a second metal alkoxide on the buffer layer, concurrently with introducing a second carrier into the reaction tubes at a flow race of 1-5000 kg/hr/coil at a temperature of 600-900° C. under a pressure of 0-3 kg/cm