Process for preparing alumina being suitable for layer chromatography
US4225639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Jun 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/93
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a process for preparing alumina being suitable for layer chromatography. The alumina suitable for layer chromatography is prepared in accordance with the invention in such a manner that an aluminium trinydroxyde containing 34 to 37% by weight of bayerite, 3 to 5% by weight of pseudoboehmite and 60 to 62% by weight of amorphous aluminium trihydroxide is heated at 300.degree. C. to 400.degree. C. for 2 to 4 hours. The activated alumina thus produced is snow-white, has a large specific surface and its average grain size is within the range between 8 and 20 .mu.m. The product complies with the requirements of layer chromatographical technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.