The Comprehensive Treatment of the Solid Waste Produced in the Course of Catalytic Cracking Catalyst Production

The Comprehensive Treatment of the Solid Waste Produced in the Course of Catalytic Cracking Catalyst Production
　　As the crude oil gets heavier and the process of residual oil catalytic cracking develops, the market calls for more super catalyst to fit the catalytic cracking process. A lot of solid and liquid materials are needed to produce the FCC. Such as: kaolinite、RECl 3、Al 2 (SO 4 ) 3 and so on. In Lanzhou petrochemical company Ball Neodymium Magnets catalyst factory, in the production process of FCC, some solid and liquid materials (especially the soluble silicon) are released into waste water system, which react with each other to form the suspension. The content of the suspension in the waste water reaches as high as 8000mg/L. The daily cumulating sludge is about 80t. As the environment-protection requirement from National Environment Department becomes more and more strict, the Lanzhou petrochemical company Catalyst factory located at the upper stream of the Yellow River, is only allowed to drain the waste water with lower suspension content than 100mg/l. In order to meet this draining requirement, we proposed this comprehensive treatment to purify the waste water with flocculation agent. After successive trial and improvement, the waste water with high suspension material from the catalyst factory is now stably drained under required standard.After adjustment for the process technology and and on the basis of some trials, we can recycle the soluble silicon material in the zeolite catalyst production process according to silicon recycling and concentrating methods .The recycle efficiency gets up to 60%. To fit the reuse of the soluble silicon, we adjust the zeolite catalyst production http://www.chinamagnets.biz  process to ensure the catalyst properties unchanged.In the disposal with flocculation agent, we mixed the different waste water with a lot of reusable soluble silicon from zeolite catalyst production process and with less solid waste from another process in order to precipitate all kinds of solid waste together by using flocculation agent. Finally, the whole solid materials in the catalyst production process are decreased to the biggest extent, and are allowed to drain with wastewater.We do not need to bury the solid waste materials containing Si and Al produced in the catalyst production process any longer, but use it as the raw materials of construction.