Improved Synthesis of SBA-15 Mesoporous Silica Fitting for Industrial Production

doi:10.3724/SP.J.1088.2012.20317

Abstract

Abstract: On the basis of scale-up synthesis of SBA-15 silica in 100 L and 2 m³ reactors, some improved methods were used to prepare SBA-15 silica by crystallizing under high ratio of SiO₂/H₂O, recycling mother liquid, and using the industrial raw material of TEOS as Si source. It is necessary to openly heat the mother liquid over 95 ^oC for 2 h to evaporate ethanol and distill the industrial material of TEOS to remove the fractions less than 163 ^oC before they are used. By these ways, almost no wastes of acid and water are discharged; 50% of P123 and 90% of HCl are saved, respectively, and the cost of SBA-15 greatly drops to 40% of the original. Furthermore, the preparation efficiency increases as twice as before. Therefore, they have great advantages in industrial production of SBA-15 silica for the purposes of environmental protection and cost control.

Key words: SBA-15, mesoporous silica, industrial production, cost control, recycling mother liquid, environmental benign

LI Yan-Rong, SONG Ming-Juan, GU Hai-Fang, HUANG Yao, NIU Guo-Xing, ZHAO Dong-Yuan. Improved Synthesis of SBA-15 Mesoporous Silica Fitting for Industrial Production[J]. Chinese Journal of Catalysis, 2012, 33(8): 1360-1366.

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