Oxidation catalyst for production of butadiene and method of preparing the same
US-2015375212-A1 · Dec 31, 2015 · US
Method for producing butadiene
US10647638B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10647638-B2 |
| Application number | US-201615779615-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 19, 2016 |
| Priority date | Dec 1, 2015 |
| Publication date | May 12, 2020 |
| Grant date | May 12, 2020 |
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Abstract
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A method for producing butadiene comprises a step of obtaining a product gas containing butadiene, by feeding a raw-material gas containing straight-chain butene and an oxygen-containing gas containing molecular oxygen to a reactor and performing oxidative dehydrogenation reaction in the presence of a catalyst, wherein the catalyst comprises a composite oxide containing molybdenum and bismuth, and the concentration of hydrocarbons having 5 or more carbon atoms in the raw-material gas is 0.05 mol % to 7.0 mol %.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing butadiene, comprising: providing a raw material gas comprising straight-chain butene and an oxygen-containing gas comprising molecular oxygen, adding hydrocarbons having 5 or more carbon atoms to the raw material gas or adjusting the amount of hydrocarbons having 5 or more carbon atoms in the raw material gas to obtain an amount of hydrocarbons having 5 or more carbons atoms in the raw material gas in the range of 0.2-7.0 mol %, and performing oxidative dehydrogenation reaction of the raw material gas with the oxygen-containing gas in a reactor and in the presence of a catalyst to produce a product gas comprising butadiene, wherein: the catalyst comprises a composite oxide containing molybdenum and bismuth; the concentration of isobutene in the raw material gas is 1.0 mol % or less; the concentration of butadiene in the raw material gas is 1.0 mol % or less; and the amount of hydrocarbons having 5 or more carbon atoms in the raw material gas allows dissolving by-products of the oxidative dehydrogenation reaction and prevents reactor blockage. 2. The method according to claim 1 , wherein the amount of hydrocarbons having 5 or more carbon atoms in the raw-material gas is in the range of 0.2-6.0 mol %. 3. The method according to claim 1 , wherein the concentration of the straight-chain butene in the raw-material gas is 60 mol % or more.
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Classifications
combined with bismuth · CPC title
Arsenic, antimony or bismuth · CPC title
Mixed oxides other than spinels, e.g. perovskite · CPC title
containing in addition other metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36 · CPC title
Molybdenum · CPC title
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- What does patent US10647638B2 cover?
- A method for producing butadiene comprises a step of obtaining a product gas containing butadiene, by feeding a raw-material gas containing straight-chain butene and an oxygen-containing gas containing molecular oxygen to a reactor and performing oxidative dehydrogenation reaction in the presence of a catalyst, wherein the catalyst comprises a composite oxide containing molybdenum and bismuth, …
- Who is the assignee on this patent?
- Jxtg Nippon Oil & Energy Corp
- What technology area does this patent fall under?
- Primary CPC classification C07C5/48. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 12 2020 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).