GB496615A - Improvements in the purification of carbon or graphite - Google Patents
Improvements in the purification of carbon or graphiteInfo
- Publication number
- GB496615A GB496615A GB146/38A GB14638A GB496615A GB 496615 A GB496615 A GB 496615A GB 146/38 A GB146/38 A GB 146/38A GB 14638 A GB14638 A GB 14638A GB 496615 A GB496615 A GB 496615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- graphite
- cylinder
- ins
- temperature
- mercury
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Resistance Heating (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
<PICT:0496615/III/1> Graphite or carbon articles such as electrodes, particularly for spectrum analysis, are purified by indirect electrical heating at a temperature above 2100 DEG C. and up to about 2350 DEG C. at a pressure below 10 ins. of mercury. A suitable furnace comprises a water-jacketed metal cylinder 1 with detachable water-cooled heads 2 and 3, the lower one of which is insulated from the cylinder. Screwed on to the heads are graphite discs 6 and 7 forming part of a graphite cylinder 8 which carries an inner container 10 in which the electrodes &c. 11 are placed. The graphite cylinder is heated by the passage of an electric current and a vacuum is applied via pipe 18. A window 16 is provided in the end of tube 17 extending through the head 3 whereby the temperature can be measured by an optical pyrometer. The pressure is preferably reduced below 2 ins. of mercury but not below 0,5 ins., and the temperature is held at the required level for 5-15 minutes. Specifications 19398/06 and 13021/11, [both in Class 90], are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US496615XA | 1937-08-27 | 1937-08-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB496615A true GB496615A (en) | 1938-12-02 |
Family
ID=21961006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB146/38A Expired GB496615A (en) | 1937-08-27 | 1938-01-03 | Improvements in the purification of carbon or graphite |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB496615A (en) |
-
1938
- 1938-01-03 GB GB146/38A patent/GB496615A/en not_active Expired
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