Synthesis of molecular sieves by hydrothermal treatment with acid
AssigneeCalifornia Institute of Technology
InventorsChristopher W. Jones, Mark E. Davis
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Abstract
Molecular sieves containing structure directing agents are treated by heating the SDA-containing molecular sieve at a temperature and for a time sufficient to remove the SDA from the molecular sieve, followed by heating the molecular sieve in an aqueous, acidic medium.
Claims46
A method of treating a molecular sieve containing a structure directing agent, the method comprising the steps of:
- A. heating the structure directing agent-containing molecular sieve to a temperature and for a time sufficient to remove the structure directing agent from the molecular sieve;
- and
- B. heating the molecular sieve from step a in an aqueous, acidic medium.
A method of increasing the hydrophobicity of a molecular sieve containing a structure directing agent, the method comprising the steps of:
- A. heating the structure directing agent-containing molecular sieve to a temperature and for a time sufficient to remove the structure directing agent from the molecular sieve;
- and
- B. heating the molecular sieve from step A in an aqueous, acidic medium
- wherein the molecular sieve from step B is more hydrophobic than the molecular sieve used in step A.
A molecular sieve produced by the process comprising the steps of:
- A. heating a structure directing agent-containing molecular sieve to a temperature and for a time sufficient to remove the structure directing agent from the molecular sieve;
- and
- B. heating the molecular sieve from step A in an aqueous, acidic medium.
An all-silica molecular sieve having the CON crystal topology.
Dependencies are inferred from the claim text.