Title: Method for preparing zeolite by using sintered bed mud as material
Application Number: 200610118669 Application Date: 2006.11.23
Publication Number: 1958449 Publication Date: 2007.05.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C01B39/02;B09B3/00;C02F11/00
Applicant(s) Name: Shanghai Jiaotong Univ. Address:
Inventor(s) Name: Wu Deyi;He Shengbing;Wang Xinze;Kong Hainan
Attorney & Agent: maocui ying
Abstract:
    This invention relates to a method for preparing zeolite by using sintered bottom sludge as the raw material. The method comprises: adding Al, Si, Cl or F-containing additives that can be solved in alkaline solution to sintered bottom sludge, and performing traditional hydrothermal method or two-step method to prepare zeolite. The traditional hydrothermal method comprises: adding NaOH or KOH solution into the raw material and the additive, heating in a reaction kettle, and reacting to prepare zeolite. The two-step method comprises: mixing the raw material and the additive with solid NaOH or KOH, melting in a furnace, transferring into a reaction kettle, adding water and heating to prepare zeolite. After adjusted with alkalinity and Si/Al ratio, the waste alkaline solution can be recycled as the alkali source in the traditional method to prepare zeolite. Sintering technique is an effective means to realize harmless treatment of bottom sludge that is pollutive to water bodies. This invention can realize efficient utilization of sintered bottom sludge, and can obtain zeolite with high added value.
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