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1. US20090053135 - PROCESS FOR THE PREPARATION OF ZMS-5 ZEOLITES

Office
United States of America
Application Number 11718349
Application Date 25.10.2005
Publication Number 20090053135
Publication Date 26.02.2009
Publication Kind A1
IPC
C01B 39/00
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
C01B 39/02
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
C01B 39/04
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
04using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound
Applicants SASOL ITALY S.p.A
Inventors Zatta Agotino
Rabaioli Maria Roberta
Radici Pierino
Aiello Rosario
Crea Fortunato
Frontiera Patrizia
Giuffrida Giuseppe
Agents OBLON, SPIVAK, MCCLELLAND MAIER &; NEUSTADT, P.C.
Title
(EN) PROCESS FOR THE PREPARATION OF ZMS-5 ZEOLITES
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/H2O 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/H2O 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.