PRODUCTION OF METAXYLENE

PURPOSE:To obtain metaxylene in high purity and yield, by bringing orthoxylene used as a raw material into contact with a zeolite catalyst selected from zeolite ZSM-4, zeolite omega and zeolite faujasite and then subjecting the reaction mixture to distillation separation. CONSTITUTION:Orthoxylene is...

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Bibliographische Detailangaben
Hauptverfasser:	NAMATAME AKIO, ONODERA TAMIO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL METHODS OF ORGANIC CHEMISTRY 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:	PURPOSE:To obtain metaxylene in high purity and yield, by bringing orthoxylene used as a raw material into contact with a zeolite catalyst selected from zeolite ZSM-4, zeolite omega and zeolite faujasite and then subjecting the reaction mixture to distillation separation. CONSTITUTION:Orthoxylene is brought into contact with a catalyst (especially preferably ZSM-4 or zeolite omega) containing at least one kind of zeolite selected from a group of zeolite ZSM-4, zeolite omega and zeolite faujasite under selective production state of metaxylene, especially at 50-250 deg.C and ordinary pressure-5kg/cm G to give a reaction mixture mainly containing orthoxylene and metaxylene, which is then subjected to distillation separation to give metaxylene as main component. Further preferably the metaxylene-rich component is brought into contact with a zeolite having >=1.1 paraxylene/ metaxylene absorption ratio to provide the high-purity metaxylene.