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1. (WO1991017115) GROWING SODIUM TYPE X ZEOLITE CRYSTALS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017115 International Application No.: PCT/AU1991/000192
Publication Date: 14.11.1991 International Filing Date: 07.05.1991
Chapter 2 Demand Filed: 27.11.1991
IPC:
B01D 53/26 (2006.01) ,B01D 53/28 (2006.01) ,C01B 39/22 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
26
Drying gases or vapours
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
26
Drying gases or vapours
28
Selection of materials for use as drying agents
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
39
Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
02
Crystalline 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
20
Faujasite type, e.g. type X or Y
22
Type X
Applicants:
UNISEARCH LIMITED [AU/AU]; 221 Anzac Parade Kensington, NSW 2033, AU (AllExceptUS)
MACLAINE-CROSS, Ian, Lachlan [AU/AU]; AU (UsOnly)
Inventors:
MACLAINE-CROSS, Ian, Lachlan; AU
Agent:
SMITH SHELSTON BEADLE; Suite 8 207 Great North Road Five Dock, NSW 2046, AU
Priority Data:
PK 002108.05.1990AU
Title (EN) GROWING SODIUM TYPE X ZEOLITE CRYSTALS
(FR) CROISSANCE DE CRISTAUX DE ZEOLITHE DE SODIUM DE TYPE X
Abstract:
(EN) Sodium type X zeolite crystals of a particle size of 50 $g(m)m or more are grown from seed crystals at a rate of about 5 $g(m)m per day in a mother liquor having an approximate composition 0.94 Na2O, 0.011 Al2O3, and 0.200 SiO2 mol/kg by adding a fine silica powder, a somewhat coarser alumina powder, and sodium hydroxide from time to time. The addition rates are such as to maintain the mother liquor at a super-saturation level of less than 20% with respect to the alumina to avoid the formation of a gel. Throughout the growing period the mother liquor is stirred and maintained at a temperature of about 95 °C.
(FR) La croissance de cristaux de zéolithe de sodium de type X, d'une grosseur de particule de 50 $g(m)m ou plus, s'effectue à partir de germes d'inoculation à un taux d'environ 5 $g(m) par jour dans une eau-mère dont la composition approximative est de 0,94 Na2O, 0,011 Al2O3, et 0,200 SiO2 mol/kg en ajoutant une fine poudre de silice, une poudre un peu plus grossière d'alumine, et un hydroxyde de sodium de temps en temps. Les taux d'addition sont tels que l'eau-mère est maintenue à un niveau de sursaturation de moins de 20% par rapport à l'alumine afin d'éviter la formation d'un gel. Pendant toute la période de croissance, l'eau-mère est remuée et maintenue à une température d'environ 95 °C.
Designated States: AU, JP, KR, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0528873US5370859JPH05508826KR1019930700362AU1991077955