Claims
- 1. Process for the manufacture of a crystalline, phosphorus-containing zeolite having a ZSM-5 type crystal lattice structure by mixing water, a silicon dioxide source, an alkali metal hydroxide and an aluminum compound, and reacting this mixture at a temperature of from 95.degree. to 230.degree. C. until the zeolite has crystallized, which comprises adding solid AlPO.sub.4 to the mixture of reactants and carrying out the reaction without addition of an organic compound, the reaction mixture having a composition expressed in terms of mole ratio of oxides of SiO.sub.2 :Al.sub.2 O.sub.3 from 15 to 200, P.sub.2 O.sub.5 :SiO.sub.2 from 10.sup.-3 to 0.2 and P.sub.2 O.sub.5 :Al.sub.2 O.sub.3 from 0.1 to 200.
- 2. Process according to claim 1, which comprises carrying out the reaction continuously or semicontinuously in a stirred vessel, the time of addition of the individual components being of from 1 to 100% of the reaction time.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3242352 |
Nov 1982 |
DEX |
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3325514 |
Jul 1983 |
DEX |
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Parent Case Info
This is a continuation-in-part-application of application Ser. No. 551,268 filed Nov. 14, 1983, now abandoned.
US Referenced Citations (6)
Non-Patent Literature Citations (1)
Entry |
Flanigen et al., "Molecular Sieve Zeolite-I", 1971, pp. 76-101. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
551268 |
Nov 1983 |
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