Polymer adsorbents and method for manufacture thereof
US3936394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1973 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Apr 9, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is to provide a method of producing an adsorbent composed of micro-fibrils, comprising the steps of mixing two synthetic polymers in a mixing ratio of 20/80 - 80/20, both of said polymers being incompatible with each other when they are intimately mixed, subjecting the mixture in molten state to an extrusion molding to shape the article in the form of threads, ropes or films where at least one of the polymers assumes the forms of micro-fibrils, and thereafter treating the shaped article with a solvent which is incapable of dissolving or decomposing one polymer but capable of dissolving or decomposing the other constituent polymer. The polymer adsorbent obtained by the above method is characterized by superior adsorbing activity and high treating efficiency and can be used for a wide range of purpose of adsorption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.