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US 9,517,942 B2Granted
Transition-metal-containing zeolite
AssigneeMitsubishi Plastics, Inc.
InventorsHaijun Chen, Takahiko Takewaki, Takeshi Matsuo
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AssigneeMitsubishi Plastics, Inc.
InventorsHaijun Chen, Takahiko Takewaki, Takeshi Matsuo
Estimating the term…
A transition-metal-containing silicoaluminophosphate zeolite having excellent high-temperature hydrothermal durability is easily and efficiently produced. A method for producing a transition-metal-containing zeolite that contains a silicon atom, a phosphorus atom, and an aluminum atom in at least its framework structure includes hydrothermal synthesis using an aqueous gel containing a silicon atom raw material, an aluminum atom raw material, a phosphorus atom raw material, a transition metal raw material, and a polyamine (other than diamines). A transition-metal-containing silicoaluminophosphate zeolite produced by hydrothermal synthesis using a zeolite raw material and the aqueous gel containing the transition metal raw material and the polyamine has excellent high-temperature hydrothermal durability and high catalytic activity.
An aluminophosphate zeolite containing 3% by weight or more transition metal M, wherein element mapping of the transition metal M in the zeolite determined with an electron probe microanalyzer shows that the coefficient of variation in intensity of the transition metal M is 33% or less and that the molar ratio of an aluminum atom to the total of a silicon atom and a phosphorus atom is 0.9 or more, and wherein the transition metal M is copper.
Dependencies are inferred from the claim text.