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1. EP1817258 - IMPROVED PROCESS FOR THE PREPARATION OF ZSM-5 ZEOLITES

Office
European Patent Office
Application Number 05795991
Application Date 25.10.2005
Publication Number 1817258
Publication Date 15.08.2007
Publication Kind B1
IPC
C01B 39/38
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
39Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
02Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
36Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
38Type ZSM-5
C01B 39/40
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
39Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
02Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
36Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
38Type ZSM-5
40using at least one organic template directing agent
CPC
C01B 39/40
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
39Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
02Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
36Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
38Type ZSM-5
40using at least one organic template directing agent
C01B 39/38
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
39Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
02Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
36Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
38Type ZSM-5
Applicants SASOL ITALY S P A
Inventors ZATTA AGOSTINO
RABAIOLI MARIA ROBERTA
RADICI PIERINO
AIELLO ROSARIO
CREA FORTUNATO
FRONTERA PATRIZIA
GIUFFRIDA GIUSEPPE
Designated States
Title
(DE) VERBESSERTES VERFAHREN ZUR HERSTELLUNG VON ZSM-5-ZEOLITHEN
(EN) IMPROVED PROCESS FOR THE PREPARATION OF ZSM-5 ZEOLITES
(FR) PROCEDE DE PREPARATION AMELIORE DE ZEOLITES ZSM-5
Abstract
(EN) Process for the synthesis of ZMS-5 zeolites essentially consisting of: a. preparing two aqueous solutions of sodium aluminate and silicate; b. putting the two solutions in contact with each other under stirring at room temperature; c. adding a solution of a mineral acid to solution (a) or to solution (b) or to solution (a) + (b), in such a quantity that the molar ratio OH-/H20 ranges from 0.02 to 0.03; d. adding a quantity of water sufficient for maintaining fluid the reacting mixture and the molar ratio OH-/H20 from 0.017 to 0.022; e. pre-heating the final mixture obtained at the end of steps (a) - (d) at a temperature ranging from 20 to 60°C; and f. heating the mixture, under stirring, at a temperature ranging from 100 to 200°C.
(FR) L'invention concerne un procédé de synthèse de zéolites ZMS-5, consistant principalement à: (a) préparer deux solutions aqueuses d'aluminate de sodium et de silicate, (b) mettre les deux solutions en contact l'une avec l'autre et les mélanger à température ambiante, (c) ajouter une solution d'acide minéral à la solution (a) ou à la solution (b) ou à la solution (a) + (b), dosée de manière à obtenir un rapport moléculaire OH-/H20 compris entre 0,017 et 0,022; (e) préchauffer le mélange final obtenu à la fin des étapes (a) (d) à une température comprise entre 10 et 60 °C, et (f) chauffer le mélange en le brassant à une température comprise entre 100 et 200°C.