Method for producing hexagonal tungsten oxide and method for producing electrochromic device including the same
US-11873232-B2 · Jan 16, 2024 · US
Production method for tungsten oxide composition
US2024308870A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2024308870-A1 |
| Application number | US-202118268519-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 15, 2021 |
| Priority date | Dec 25, 2020 |
| Publication date | Sep 19, 2024 |
| Grant date | — |
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Abstract
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An object of the present invention is to provide a production method that can obtain a tungsten oxide composition having excellent dispersibility and excellent uniformity for shapes of particles. The present invention is a production method for a tungsten oxide composition, comprising: (1) a reaction step of bringing a tungsten halide and a monohydric alcohol into contact with each other and performing heating at 100° C. or higher and 250° C. or lower at a temperature-increasing rate of 3.0° C./min or lower to obtain a composition (I) comprising tungsten oxide and the monohydric alcohol; (2) a step of mixing the composition (I) and one type or two or more types of compounds (A) selected from amines, fatty acids, thiols, and phosphines to obtain a composition (II); and (3) a step of removing at least a part of the monohydric alcohol and a part of the compound (A) from the composition (II) to obtain a composition (III). The present invention preferably further comprises (4) a step of mixing the composition (Ill) and an organic solvent (C) having a dielectric constant of 10 or lower.
First claim
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1 . A production method for a tungsten oxide composition, comprising: (1) a reaction step of bringing a tungsten halide and a monohydric alcohol into contact with each other and performing heating at 100° C. or higher and 250° C. or lower to obtain a composition (I) comprising tungsten oxide and the monohydric alcohol; (2) a step of mixing the composition (I) and one type or two or more types of compounds (A) selected from amines, fatty acids, thiols, and phosphines to obtain a composition (II); and (3) a step of removing at least a part of the monohydric alcohol and a part of the compound (A) from the composition (II) to obtain a composition (III). 2 . The production method according to claim 1 , wherein the heating to 100° C. or higher and 250° C. or lower is performed at a temperature-increasing rate of 3.0° C./min or lower. 3 . The production method according to claim 1 , further comprising (4) a step of mixing the composition (III) and an organic solvent (C) having a dielectric constant of 10 or lower to obtain a composition (IV). 4 . The production method according to claim 1 , wherein the monohydric alcohol is a monohydric alcohol having 6 to 20 carbon atoms. 5 . The production method according to claim 1 , wherein the compound (A) comprises an amine compound having 6 to 20 carbon atoms. 6 . The production method according to claim 1 , wherein a crystallite diameter of the tungsten oxide calculated by XRD measurement is 1 to 30 nm. 7 . The production method according to claim 3 , wherein a content amount of the tungsten oxide in the composition (IV) is 10% by mass to 50% by mass.
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water content · CPC title
by thermal analysis data, e.g. TGA, DTA, DSC · CPC title
by d-values or two theta-values, e.g. as X-ray diagram · CPC title
Compounds characterised by their crystallite size · CPC title
Compositional purity · CPC title
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- What does patent US2024308870A1 cover?
- An object of the present invention is to provide a production method that can obtain a tungsten oxide composition having excellent dispersibility and excellent uniformity for shapes of particles. The present invention is a production method for a tungsten oxide composition, comprising: (1) a reaction step of bringing a tungsten halide and a monohydric alcohol into contact with each other and pe…
- Who is the assignee on this patent?
- Nippon Catalytic Chem Ind
- What technology area does this patent fall under?
- Primary CPC classification C01G41/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Sep 19 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).