Crystalline aluminosilicate zeolite and process for production thereof
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United States of America Patent
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Jun 18, 1985
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N/A
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Feb 22, 1983
filing date -
Feb 22, 1982
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Abstract
A novel crystalline aluminosilicate zeolite characterized by having (a) a silica/alumina mole ratio in the range of from 10 to 100, (b) X-ray lattice distances d shown in Table A in the specification, and (c) a (cyclohexane/n-hexane) adsorption ratio of at least 0.7. This crystalline aluminosilicate zeolite is useful, for example, as a catalyst in the isomerization reaction or transalkylation reaction of alkylbenzenes or alkylnaphthalenes, and can be prepared by heating a crystalline aluminosilicate zeolite ZSM-5 having a silica/alumina mole ratio of from 20 to 300 at a temperature between 80.degree. C. and 250.degree. C. in an aqueous solution containing 0.1 to 1 g, per gram of the ZSM-5 zeolite, of an alkali metal hydroxide.
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