Dewaxing of dried oil
US5066504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Apr 24, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11B3/008
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method for dewaxing oil, comprising steps of: PA1 i) drying the oil to a water content of less than 0.5% by wt; PA1 ii) heating the oil to a temperature at which the oil does not contain nucleation seeds for wax crystal formation; PA1 iii) cooling the dried oil from the temperature at which it does not contain nucleation seeds for wax crystal formation, at a cooling rate of less than 15.degree. C. per hour and at a temperature difference between the oil and the coolant medium of less than 15.degree. C., to an oil end temperature being in the range of 2.degree.-10.degree. C. wherein a solid wax is formed; and PA1 iv) removing the solid wax by microfiltration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.