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
US11964260B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11964260-B2 |
| Application number | US-202017060641-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 1, 2020 |
| Priority date | Aug 8, 2016 |
| Publication date | Apr 23, 2024 |
| Grant date | Apr 23, 2024 |
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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
Opening claim text (preview).
The invention claimed is: 1. A method for manufacturing ammonia, the method comprising: contacting a gas containing nitrogen and hydrogen with a catalyst, wherein the catalyst comprises 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 method for manufacturing ammonia according to claim 1 , wherein the alkaline earth metal atom is barium.
Assignees
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Classifications
- B01J23/58Primary
with alkali- or alkaline earth metals · CPC title
Alumina · CPC title
Ruthenium · CPC title
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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- What does patent US11964260B2 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 Apr 23 2024 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).