Process for preparation of synthetic mordenite molded body
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United States of America Patent
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Aug 29, 1989
Grant Date -
N/A
app pub date -
Sep 19, 1986
filing date -
Sep 20, 1985
priority date (Note) -
Expired
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Abstract
A synthetic mordenite molded body is prepared by a process wherein a starting mixture comprising, as the main components, a silica source, an alumina source, an alkali source and water is molded into a starting molded body, the molded body is calcined and the calcined molded body is heated in an aqueous solution of sodium silicate. The starting mixture has incorporated therein a mordenite seed crystal powder. When the molded body is calcined, the temperature is elevated by heating to a calcination temperature not lower than 400.degree. C. at an average rate of at least 10.degree. C./min and calcination is conducted at the calcination temperature within a time period of 2 hours. When the calcined molded body is crystallized, an aqueous solution of sodium silicate having an SiO.sub.2 concentration of 7 to 25% by weight, an Na.sub.2 O concentration of 2 to 8% by weight and an SiO.sub.2 /Na.sub.2 O molar ratio of from 0.9 to 4.0 is used as the aqueous solution of sodium silicate.
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