关键词: 催化裂化, 端氨基, 嵌段聚醚, 油浆, 沉降助剂

Abstract:

Settling aids method is one of the most used approaches to remove solid particles from catalytic cracking slurry. Focus on the shortcomings of exiting slurry settling aids, an amino-terminated block polyether, which combined amine groups that provided hydrogen bonds and acid-base pairs with block polyether that provided bridging action, was prepared and determined by liquid nuclear magnetic spectrum. The comparative experiments showed that the amine group and block polyether played a synergistic role, and the linkage promoted the dispersion of amine groups in the oil slurry. In order to facilitate industrial applications, the amino-terminated block polyether was compounded with solvent oil and glycol to prepare the resultant settling aids with different contents. Through the investigation of the dosage, settling temperature and settling time, the optimum process conditions were determined as follows: the settling aids with 40% amino-terminated block polyether contained was added into oil slurry with a dosage of 400mg/kg and kept at 90℃ for 48h. With this process, the deash efficiency can be more than 90% and the residual ash in the upper slurry can be less than 0.02%, which can be used to prepare high-value products, such as advanced carbon black. For this high effective settling aids, the raw materials is easy to obtained, thus it has a great potential for industrial production and applications.

Key words: catalytic cracking, terminal-amino groups, block polyether, slurry, settling aids