Silica composite, method for producing the same, and method for producing propylene using the silica composite
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United States of America Patent
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Jun 6, 2017
Grant Date -
Mar 9, 2017
app pub date -
Nov 21, 2016
filing date -
Nov 25, 2010
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Abstract
A method for producing propylene, the method contains: producing a silica composite by preparing a raw material mixture containing silica and zeolite; drying the raw material mixture to obtain a dried product; and calcining the dried product; wherein the method contains the step of bringing a solution of phosphate into contact with the zeolite and/or the dried product to thereby adjust a phosphorus content in the silica composite to 0.01 to 1.0% by mass based on the total mass of the silica composite, a source of the phosphorus is phosphate, and the zeolite is of MFI type and has a SiO2/Al2O3 ratio (by mol) of 20 or more; and bringing the silica composite into contact with a hydrocarbon source containing at least one component selected from the group consisting of ethylene, ethanol, methanol, and dimethyl ether in the presence of steam.
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