Siliceous molecular sieves having low acid activity and process

Details Siliceous molecular sieves having low acid activity and process Siliceous molecular sieves having low acid activity and process

1991-12-26

1993-11-16

McFarlane, Anthony

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423332, 423334, 502407, 502411, 502414, C01B 3320, B01J 2018

Patent

active

052621448

ABSTRACT:
The present invention relates in general to highly siliceous zeolitic molecular sieve adsorbent compositions having reduced catalytic activity and to the process for preparing such compositions. The number of acid sites in the so-called silica molecular sieves is very low, but exhibit a disproportionately high acid activity. In a variety of adsorptive separation applications in which the hydrophobic character of these molecular sieves is important, undesirable catalytic conversion of one or more of the adsorbates is frequently encountered. This acid activity is effectively eliminated by incorporating a stoichiometric excess with respect to the aluminum content of the molecular sieve of an alkali metal compound into the molecular sieve followed by calcining the loaded silicalite at temperatures of at least 750.degree.C. The adsorbent is particularly useful in separations of materials which are subject to catalytically initiated reactions, e.g., olefins and alcohols.

REFERENCES:
patent: 2985589 (1961-05-01), Broughton et al.
patent: 3706812 (1970-12-01), De Rosset et al.
patent: 4073865 (1978-02-01), Flanigen et al.
patent: 4340503 (1982-07-01), Rao et al.
patent: 4435516 (1984-03-01), Chang et al.
patent: 4455445 (1984-06-01), Neuzil et al.
patent: 4542117 (1985-09-01), Morris et al.
patent: 5052561 (1991-10-01), Miller et al.
patent: 5053372 (1991-10-01), Brownscombe
patent: 5147526 (1992-09-01), Kukes et al.
patent: 5159128 (1992-10-01), Forschner et al.

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