Process for dealuminization of the synthetic zeolites of large pores, catalysts and selective organophilic adsorbents containing the dealuminized zeolites obtained according to the process and essentially silicic beta zeolite
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United States of America Patent
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May 10, 1994
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app pub date -
Nov 26, 1991
filing date -
Nov 26, 1990
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Abstract
A process is provided for dealuminization of zeolites having large pores, the diameter of the aperture of the pores being greater than or equal to about 0.7 nm and the silica/alumina ratio greater than or equal to about 6. The process comprises acid leaching of the raw zeolite containing the structuring agent. The dealuminized zeolites obtained are useful as catalysts for the transformation of hydrocarbons and as selective organophilic adsorbents.
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