Method for dewaxing waxy petroleum products
US5098550A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G73/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for the solvent dewaxing of wax-containing petroleum products with at least one solvent suitable for dewaxing and a polymeric dewaxing aid comprising polyacrylates, by mixing the products to be dewaxed with the solvent and the polymeric dewaxing aid, chilling the mixture so obtained, and separating the precipitated wax, the dewaxing aid used being a mixture of PA0 (I) a polymer of esters of acrylic acid with C.sub.10 -C.sub.40 alkanols and PA0 (II) a polymer of esters of methacrylic acid with alkanols comprising more than 10 weight percent of branched alkanols, the weight ratio between components (I) and (II) ranging from 1:20 to 20:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.