Process for preparing zeolites

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(11)

EP 2 258 658 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A2)

(48)	Corrigendum issued on:
	07.03.2012 Bulletin 2012/10

(88)	Date of publication A3:
	14.12.2011 Bulletin 2011/50

(43)	Date of publication:
	08.12.2010 Bulletin 2010/49

(21)	Application number: 10179898.1

(22)	Date of filing: 18.09.1998

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International Patent Classification (IPC):

C01B 37/00^(2006.01)

C01B 37/02^(2006.01)

(84)	Designated Contracting States:
	BE CH DE DK ES FR GB LI LU NL

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Priority:

30.10.1997 IT MI972250

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	05107673.5 / 1614658
	98117721.5 / 0906784

(71)	Applicant: Polimeri Europa S.p.A.
	20097 San Donato Milanese (MI) (IT)

(72)	Inventors:
	Carati, Angela 20098, San Giuliano Milanese, Milano (IT) Bellussi, Giuseppe 29100 Piacenza (IT) Mantegazza, Mariangela 20040 Cambiago (IT) Petrini, Guido 28066, Galliate, Novara (IT)

(74)	Representative: Coletti, Raimondo et al
	Barzanò & Zanardo Milano S.p.A. Via Borgonuovo, 10 20121 Milano 20121 Milano (IT)


	Remarks:
	This application was filed on 27.09.2010 as a divisional application to the application mentioned under INID code 62.

(54)	Process for preparing zeolites

(57) A process is described for the preparation of zeolitic catalysts in the form of microspheres, comprising zeolite and oligomeric silica, characterized by a high mechanical resistance. The process consists in subjecting to rapid drying the suspension, to which tetra-alkylorthosilicate is optionally added, resulting from the synthesis of zeolite by hydrothermal treatment at autogenous pressure of the reagent mixture containing tetra-alkylammoniumhydroxide as templating agent, and subjecting the product resulting from the drying to calcination.