Ammonia synthesis method and catalyst for ammonia synthesis
US-2015353369-A1 · Dec 10, 2015 · US
Method for manufacturing ammonia synthesis catalyst, and method for manufacturing ammonia
US12458953B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12458953-B2 |
| Application number | US-202418612668-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 21, 2024 |
| Priority date | Aug 8, 2016 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
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Abstract
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Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO·7Al 2 O 3 having a specific surface area of 5 m 2 /g or above; a second step for supporting a ruthenium compound on the 12CaO·7Al 2 O 3 ; and a third step for performing a reduction process on the 12CaO·7Al 2 O 3 supporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.
First claim
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The invention claimed is: 1 . A metal-supported material, comprising 12CaO·7Al 2 O 3 ; and plural kinds of metal atoms supported on the 12CaO·7Al 2 O 3 , wherein a specific surface area of the 12CaO·7Al 2 O 3 is 5 m 2 /g or more; and the plural kinds of metal atoms comprises a metal ruthenium, and an alkali metal atom or an alkaline earth metal atom. 2 . The metal-supported material according to claim 1 , wherein the alkaline earth metal atom is barium. 3 . A catalyst comprising a metal-supported material which comprises 12CaO·7Al 2 O 3 , and plural kinds of metal atoms supported on the 12CaO·7Al 2 O 3 , wherein a specific surface area of the 12CaO·7Al 2 O 3 is 5 m 2 /g or more; and the plural kinds of metal atoms comprises a metal ruthenium and an alkali metal atom or an alkaline earth metal atom.
Assignees
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Classifications
characterised by the catalyst · CPC title
Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title
Impregnation · CPC title
Ruthenium · CPC title
Alumina · CPC title
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- What does patent US12458953B2 cover?
- Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an …
- Who is the assignee on this patent?
- Tokyo Inst Tech, Tsubame Bhb Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01J23/58. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 04 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).