Shape selective modification method of zeolite catalyst

The shape-selecting modifying method of zeolite catalyst includes the following steps: soaking zeolite catalyst whose active component is ZSM-5 with polysiloxane whose molecular weight is 300-4000 for 1-60 hr, filtering, drying and roasting, the described polysiloxane mainly is selected from polydim...

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Bibliographische Detailangaben
Hauptverfasser:	HAOHUI GU, SHOUXI GUI, JINXUAN DU
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The shape-selecting modifying method of zeolite catalyst includes the following steps: soaking zeolite catalyst whose active component is ZSM-5 with polysiloxane whose molecular weight is 300-4000 for 1-60 hr, filtering, drying and roasting, the described polysiloxane mainly is selected from polydimethyl siloxane and polyhydroxymethyl siloxane, and the catalyst made up by adopting said invented method is applicable to disproportionation of aromatics, specially is applicable to toluene disproportionation reaction to prepare benzene and paraxylene. The toluene conversion rate of modified catalyst can be up to 31 wt%, and the selectivity of paraxylene can be up to 95 wt%.