GB1436995A - Purification of graphite to produce pure nuclear-grade graphite - Google Patents
Purification of graphite to produce pure nuclear-grade graphiteInfo
- Publication number
- GB1436995A GB1436995A GB3179874A GB3179874A GB1436995A GB 1436995 A GB1436995 A GB 1436995A GB 3179874 A GB3179874 A GB 3179874A GB 3179874 A GB3179874 A GB 3179874A GB 1436995 A GB1436995 A GB 1436995A
- Authority
- GB
- United Kingdom
- Prior art keywords
- graphite
- hydrogen difluoride
- purification
- purifying
- july
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/215—Purification; Recovery or purification of graphite formed in iron making, e.g. kish graphite
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
1436995 Purifying graphite HOBEG HOCHTEMPERATURREAKTOR - BRENNELEMENT GmbH 18 July 1974 [23 July 1973] 31798/74 Heading C1A A process for purifying graphite comprises treating the graphite at elevated temperature with ammonium and/or an alkali metal hydrogen difluoride as an aqueous solution or in dry form, contacting the mixture with water when the dry form is used, and then separating the solution containing impurities. In one embodiment, the graphite is in an aqueous suspension or the hydrogen difluoride is in an aqueous solution and after contact the solution containing impurities is filtered off or decanted, the wet graphite is washed free of acid and then dried. In another embodiment, the graphite is mixed in powder form with dry hydrogen difluoride to obtain a uniform distribution, the mixture is heated to 125‹ to 240‹ C., cooled below 100‹ C., and washed with water to remove salts and other disassociation products. The process may be combined with other treatments, e.g. with an alkaline or alkaline-earth metal salt and/or with an acid to effect further purification. Unused hydrogen difluoride is preferably recovered and after purification recycled. The process is particularly useful for purifying graphite for use in nuclear fuel elements.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732337428 DE2337428C3 (en) | 1973-07-23 | Process for cleaning graphite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1436995A true GB1436995A (en) | 1976-05-26 |
Family
ID=5887765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3179874A Expired GB1436995A (en) | 1973-07-23 | 1974-07-18 | Purification of graphite to produce pure nuclear-grade graphite |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5044187A (en) |
| BE (1) | BE817961A (en) |
| FR (1) | FR2238670B1 (en) |
| GB (1) | GB1436995A (en) |
| IT (1) | IT1014140B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9793019B1 (en) | 2014-03-26 | 2017-10-17 | Savannah River Nuclear Solutions, Llc | Low temperature chemical processing of graphite-clad nuclear fuels |
| CN111186834A (en) * | 2020-01-09 | 2020-05-22 | 成都理工大学 | Method for preparing high-purity graphite by adopting natural crystalline graphite |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE55360T1 (en) * | 1986-03-27 | 1990-08-15 | Voest Alpine Ind Anlagen | PROCESS FOR OBTAINING HIGH-PURITY GRAPHITE FROM NATURAL GRAPHITE. |
| US20090172998A1 (en) * | 2008-01-08 | 2009-07-09 | Carbonxt Group Limited | System and method for refining carbonaceous material |
| RU2740746C1 (en) * | 2020-02-05 | 2021-01-20 | Федеральное государственное бюджетное учреждение науки Институт химии Дальневосточного отделения Российской академии наук (ИХ ДВО РАН) | Method of cleaning fly ash graphite (versions) |
| CN115304060B (en) * | 2022-08-31 | 2024-03-15 | 碳一新能源集团有限责任公司 | Roller drying device, purification process for improving pH value of crystalline flake graphite by roller drying device and crystalline flake graphite |
-
1974
- 1974-05-08 IT IT68447/74A patent/IT1014140B/en active
- 1974-06-12 FR FR7420404A patent/FR2238670B1/fr not_active Expired
- 1974-07-18 GB GB3179874A patent/GB1436995A/en not_active Expired
- 1974-07-22 JP JP49084040A patent/JPS5044187A/ja active Pending
- 1974-07-22 BE BE6044698A patent/BE817961A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9793019B1 (en) | 2014-03-26 | 2017-10-17 | Savannah River Nuclear Solutions, Llc | Low temperature chemical processing of graphite-clad nuclear fuels |
| CN111186834A (en) * | 2020-01-09 | 2020-05-22 | 成都理工大学 | Method for preparing high-purity graphite by adopting natural crystalline graphite |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5044187A (en) | 1975-04-21 |
| FR2238670A1 (en) | 1975-02-21 |
| IT1014140B (en) | 1977-04-20 |
| DE2337428B2 (en) | 1977-04-28 |
| BE817961A (en) | 1975-01-22 |
| DE2337428A1 (en) | 1975-02-27 |
| FR2238670B1 (en) | 1976-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |