Use of synthetic granulate or powder for the removal of liquid, gaseous and/or dissolved constituents from a process stream
US5750030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Aug 16, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
It is proposed to use a synthetic granulate or powder with a particle size of 0.1 to 10 mm as packing material for the removal of liquid, gaseous and/or dissolved constituents from a process stream, which packing material is made up of a porous, preferably dimensionally stable polymer having an overall porosity of 50 to 95% by volume, which when used as an extracting medium has pores of a diameter of 0.01 to 50 .mu.m, with an extracting liquid immobilised therein, or when used as a coalescence medium has a cellular body/window structure with the diameter of more than 50% by volume of the bodies being in the range of 100 to 700 .mu.m, which materials can be obtained by dissolving a polymer in one or more liquid and miscible compounds at a temperature above the upper critical phase separation temperature Tc, followed by a lowering of the temperature and mechanical diminution of the polymer filled with the liquid compounds, optionally followed by removal of the liquid therefrom and, optionally, refilling of at least 10% of the pore volume with an extracting liquid, characterised in that the polymer solution incorporates 5 to 60% by volume of filler, calculated on the overall solids co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.