Process for producing liquid polysilanes and isomer enriched higher silanes
US-2020223703-A1 · Jul 16, 2020 · US
Cyclohexasilane
US9764961B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9764961-B2 |
| Application number | US-201715437845-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 21, 2017 |
| Priority date | Dec 25, 2012 |
| Publication date | Sep 19, 2017 |
| Grant date | Sep 19, 2017 |
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Abstract
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High purity cyclohexasilane and a method for increasing the purification efficiency thereto are provided. The method for producing cyclohexasilane of the present invention is characterized in that, in distilling crude cyclohexasilane to obtain purified cyclohexasilane, the absolute pressure during distillation is set to 2 kPa or less, and the heating temperature of crude cyclohexasilane is set to 25 to 100° C. The cyclohexasilane of the present invention contains pure cyclohexasilane at a rate of 98% by mass or more and 100% by mass or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. Cyclohexasilane comprising pure cyclohexasilane at a rate of 98% by mass or more and less than 100% by mass, comprising hexasilane and a dimer of cyclohexasilane at a rate of 0.0001% by mass or more and 2% by mass or less. 2. Cyclohexasilane in which the content of a metal element is 0.01 to 100 ppb. 3. Cyclohexasilane in which the content of sodium is 0.01 to 100 ppb. 4. Cyclohexasilane in which the content of chromium is 0.01 to 10 ppb. 5. Cyclohexasilane in which the content of potassium is 0.01 to 10 ppb. 6. The cyclohexasilane according to claim 2 , wherein the content of the polymer component is 0 to 0.5% by mass. 7. The cyclohexasilane according to claim 2 , wherein the increase in the polymer when stored under nitrogen atmosphere at 25° C. for 30 days is 0 to 0.5% by mass in a container that is a metal container in which inner wall is coated with a resin material. 8. Cyclohexasilane comprising pure cyclohexasilane at a rate of 98% by mass or more and less than 100% by mass, and further comprising hexasilane at a rate of 0.0001% by mass or more and 2% by mass or less.
Assignees
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Classifications
- C01B33/046Primary
Purification · CPC title
- C01B33/04Primary
Hydrides of silicon · CPC title
Organic compounds · CPC title
with stationary reactants · CPC title
Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons · CPC title
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- What does patent US9764961B2 cover?
- High purity cyclohexasilane and a method for increasing the purification efficiency thereto are provided. The method for producing cyclohexasilane of the present invention is characterized in that, in distilling crude cyclohexasilane to obtain purified cyclohexasilane, the absolute pressure during distillation is set to 2 kPa or less, and the heating temperature of crude cyclohexasilane is set …
- Who is the assignee on this patent?
- Nippon Catalytic Chem Ind
- What technology area does this patent fall under?
- Primary CPC classification C01B33/046. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 19 2017 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).