Processes for producing a bleaching clay product
US6288003A · kind A · utility
7Cited by
25References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the production of a bleaching clay product which includes the steps of selecting a naturally occurring hormite clay product, cleaning and crushing the clay product to form clay clumps less than 2 in. in diameter, aging the crushed hormite clay and activating the clay with extremely small amounts of acid, in the range of less than 1 percent, by weight. The process may also be conducted without an aging step. Also, an acceptable bleaching clay product can be produced without the addition of any acid to the aged hormite clay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.