Method of in-situ crystallized synthesis of ZSM-5/mordenite compound
The invention provides a method of in-situ crystallized synthesis of ZSM-5/mordenite compound by using a direct method without a template. The method comprises pre-treating high-temperature-roasted kaolin microspheres by using sodium silicate, adding acid to prepare a reaction mixture, and performin...
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Main Authors | , , , , , , , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
21.08.2013
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides a method of in-situ crystallized synthesis of ZSM-5/mordenite compound by using a direct method without a template. The method comprises pre-treating high-temperature-roasted kaolin microspheres by using sodium silicate, adding acid to prepare a reaction mixture, and performing hydrothermal crystallization to obtain in-situ products containing the ZSM-5/mordenite compound and ex-situ ZSM-5/mordenite composite molecular sieve. The kaolin microsphere in-situ crystallized ZSM-5/mordenite composite molecular sieve prepared by the invention is relatively high in relative crystallinity of the ZSM-5/mordenite, wherein the crystallinity can be adjusted according to requirements, is good in wear resistance performance, and can be used to improve propylene yield in a FCC technology. The co-produced ex-situ ZSM-5/mordenite composite molecular sieve has a crystallinity of the ZSM-5 being more than 80%, and a crystallinity of the mordenite being more than 70 %. |
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Bibliography: | Application Number: CN2012135258 |