Claims
- 1. A process for manufacturing an alkali metal aluminosilicate of zeolite P type having the oxide formula
- M.sub.2/n O:Al.sub.2 O.sub.3 :x SiO.sub.2 :yH.sub.2 O
- wherein M is an n-valent alkali metal;
- x is at least 1.8; and
- y is the water content, wherein a sodium silicate solution and a sodium aluminate solution are continuously added together in a first reacting zone in the presence of zeolite P seeds, to produce a mixture having the formula:
- 3. 0-5.0 Na.sub.2 O:2.2-7.5 SiO.sub.2 :Al.sub.2 O.sub.3 :75-450 H.sub.2 O
- the mixture being continuously transferred from the first reacting zone to a second reacting zone, the resulting alkali metal aluminosilicate of zeolite P type being filtered, washed and dried, a second sodium aluminate solution being added in the second reacting zone so as to give an overall SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio of less than 2.2 and a H.sub.2 O/Al.sub.2 O.sub.3 mole ratio of less than 150.
- 2. Process as claimed in claim 1 in which the second sodium aluminate solution is added so as to give an overall SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio of about 2.0.
- 3. Process as claimed in claim 1 in which each reacting zone is provided by a zone of a plug flow reactor.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9422401 |
Nov 1994 |
GBX |
|
Parent Case Info
This application is the national phase of international application PCT/EP95/04195, filed Oct. 24, 1995 which was designated the U.S.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/EP95/04195 |
10/24/1995 |
|
|
7/28/1997 |
7/28/1997 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO96/14270 |
5/17/1996 |
|
|
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Jan 1963 |
|
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May 1983 |
|
5560829 |
Adams et al. |
Oct 1996 |
|
5645811 |
Kuhm et al. |
Jul 1997 |
|
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EPX |
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EPX |
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WOX |
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May 1995 |
WOX |
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WOX |