Method for removing impurities in catalytic dry gas

• Main Authors: GUO YINLIANG, SHAN XIANSONG, SUN HONGXING
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a method for removing impurities in catalytic dry gas, the method comprises five steps of dry gas pretreatment, cold oil absorption, desorption, cold separation and reduction, after the dry gas is subjected to deacidification treatment and secondary compression, the temperature and pressure of dry gas pretreatment are controlled, acidic substances, smoke and dust in the catalytic dry gas are removed, and the volume of the dry gas is compressed; light hydrocarbon is absorbed and recovered by cold oil, C2, C3 and other components are separated by cold separation, and unabsorbed components mainly comprising methane are recovered by reduction and deoxidation, so that the recovery of crude ethylene and crude methane is achieved; oxidizing gas existing in the dry gas is removed through the reduction step, methane with higher concentration is obtained, and stable storage conditions are provided for the methane. 本申请公开了一种催化干气中除杂的方法，包括干气预处理、冷油吸收、解吸、冷分离和还原五个步骤，通过将干气进行除酸处理和二级压缩后，控制干气预处理的温度和压力，去除催化