Industrial adsorbents based on low-silica X zeolites, for non-cryogenic separation of air gases, and their manufacture process
US5173462A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Nov 14, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/183
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An industrial shaped adsorbent for the non-cryogenic separation of gases from air, comprising from 70 to 95% by weight zeolites, and, correspondingly, from 30 to 5% by weight of a clay binder, PA0 (a) said zeolites consisting essentially of mixtures of X and A zeolites having an X crystallinity greater than or equal to 95% and an A crystallinity less than or equal to 5%, a toleune standard adsorption of 23.+-.1% and an X-ray spectrum characteristic of a practically pure faujasite, and with the Si/Al ratio of the crystalline component being 1.+-.0.03, and PA0 (b) with the adsorbent having a 2Ca/Al ratio between about 80 and 99%, a nitrogen adsorption between 16 and 23.5 L/kg and a ratio of the nitrogen to the oxygen adsorption capacities under 1 bar between 3.5 and 4.5 and the process of making such adsorbents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.