Process for determination of nitrogen
US6287868A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Jul 29, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/176152
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process is claimed for the determination of nitrogen content in a nitrogen containing material, said process comprising: a) at least one pre-treatment step, b) at least one distillation step and c) at least one determination step; wherein said distillation step (a) comprises the substeps of: i) diluting a pre-treated sample of a nitrogen containing material with at least one diluting fluid, ii) inputting steam for commencement of steam distillation, and iii) adding at least one alkali compound, whereby the addition of alkali is made 1-60 seconds after commencement of said inputting of steam and said steam distillation and whereby distillate produced during said steam distillation is recovered in an acidic and/or complexing medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.