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1. WO1996002462 - PROCESS FOR PREPARATION OF ZEOLITE 'X'

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Publication Number WO/1996/002462
Publication Date 01.02.1996
International Application No. PCT/US1995/009049
International Filing Date 18.07.1995
Chapter 2 Demand Filed 15.02.1996
IPC
C01B 39/22 2006.01
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
20Faujasite type, e.g. type X or Y
22Type X
CPC
C01B 39/22
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
20Faujasite type, e.g. type X or Y
22Type X
Y10S 423/21
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
423Chemistry of inorganic compounds
21Faujasite, e.g. X, Y, CZS-3, ECR-4, Z-14HS, VHP-R
Applicants
  • ALBEMARLE CORPORATION [US]/[US]
Inventors
  • HU, Patrick, C.
  • LIIMATTA, Eric, W.
Agents
  • PIPPENGER, Philip, M.
Priority Data
08/275,72219.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR PREPARATION OF ZEOLITE 'X'
(FR) PROCEDE DE PREPARATION DE LA ZEOLITE X
Abstract
(EN)
A method for producing crystalline synthetic faujasite of the zeolite 'X' type is disclosed. The method comprises (a) separately preparing a sodium silicate solution and a sodium aluminate solution, (b) admixing the sodium silicate solution and the sodium aluminate solution at high shear until a mixture results having a ratio of sodium oxide to silica of 0.4:1 to 1:1, silica to alumina of 25:1 to 1.5:1, and water to sodium oxide of 20:1 to 50:1, (c) heating said mixture to a temperature of about 80 to 120 °C in the absence of any further mixing for a period of time sufficient to produce the desired crystalline faujasite of the zoelite 'X' type, and (d) recovering said zeolite 'X'.
(FR)
L'invention concerne un procédé de production de faujasite cristalline synthétique de zéolite de type X. Le procédé consiste (a) à préparer séparément une solution de silicate de sodium et une solution d'aluminate de sodium, (b) à mélanger les solutions de silicate de sodium et d'aluminate de sodium avec un cisaillement élevé jusqu'à l'obtention d'un mélange présentant un rapport oxyde de sodium/dioxyde de silicium de 0,4/1 à 1/1, dioxyde de silicium/oxyde d'aluminium de 25/1 à 1,5/1, et eau/oxyde de sodium de 20/1 à 50/1, (c) à porter ledit mélange à une température d'environ 80 à 120 °C en l'absence de tout mélange supplémentaire pendant une période suffisante pour produire la faujasite cristalline de zéolite de type X désirée, et (d) à extraire ladite zéolite X.
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