Solvent recovery from foots oil using modified regenerated cellulose membranes
US4368112A · kind A · utility
19Cited by
23References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1981 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | May 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G73/025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A warm-up deoiling process for lube oil slack wax wherein cold slack wax from a solvent dewaxing operation is warmed up and mixed with solvent to dissolve foots oil contained therein and passed to a rotary drum filter to recover solid wax and a filtrate comprising a solution of foots oil and solvent wherein said filtrate is contacted with one side of a semi-permeable membrane made from regenerated cellulose which selectivity permeates at least a portion of solvent through said membrane and recycling the permeated solvent directly back into the warm-up deoiling operation as part of the solvent mixed with the slack wax.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.