Solvent dewaxing waxy hydrocarbon distillates using a combination poly acrylate polymer and polymethacrylate polymer dewaxing aid
US4451353A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Sep 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G73/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to solvent dewaxing processes, for dewaxing waxy hydrocarbon oils using a dewaxing aid, which dewaxing aid comprises a mixture of (A) polyalkyl arcylate having alkyl group side chain length of from 10-26 carbons (excluding branching) and (B) an n-alkyl methacrylate polymer having alkyl group side chain length of from 10-20 carbons (excluding branching). Component (A) typically has a number average molecular weight of from 3,000 to 500,000 while component (B) typically has a number average molecular weight of from 5,000 to 200,000. The combination (A) plus (B) may be employed in a weight ratio within the range from about 1/100 to 100/1, preferably about 1/6 to 2/1 and at an aid does level ranging from about 0.01 wt % to 1 wt %, preferably 0.02 to 0.2 wt % active ingredient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.