油页岩灰渣碱法制取白炭黑的工艺研究

Abstract

Abstract: Ultrafine silica was prepared by alkaline method using the oil shale ash as the raw material from Maoming， Guangdong. The effects of parameters of alkaline leaching process on the leaching rate of ultrafine silica were particularly studied，and the optimum conditions were obtained：concentration of sodium hydroxide was 4 mol/L，the amount-of-sub- stance ratio of sodium hydroxide to silica was 5∶1，alkaline leaching temperature was 110 ℃，acid leaching time was 4 h，cal- cination temperature was 750 ℃，and calcination time was 2.5 h.Under these optimum conditions，the yield was 81.49% and the brightness was 98.1%.The prepared product was characterized by IR and the properties were tested.The quality of prepared ultrafine silica could meet the requirements according to chemical industry standard HG/T 3061—2009.

Key words: oil shale ash, silica, alkaline method, yield

CLC Number:

TQ127.2

ZHOU Jian-Min, TAN Li-Quan, YU Mei, NIU Xian-Chun, LIN Zhuo-Xian, WANG Jian. Study on alkaline preparation of ultrafine silica from oil shale ash[J]. INORGANICCHEMICALSINDUSTRY, 2016, 48(10): 56-.

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Inorganic Acid-Base-Salt Committee of CIESC

Study on alkaline preparation of ultrafine silica from oil shale ash

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