Process for manufacturing lubrication base oils
US-2020102508-A1 · Apr 2, 2020 · US
Method for processing used oils
US11078440B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11078440-B2 |
| Application number | US-201716470007-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 15, 2017 |
| Priority date | Dec 16, 2016 |
| Publication date | Aug 3, 2021 |
| Grant date | Aug 3, 2021 |
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- Title
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Abstract
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The invention relates to a method for lowering the content of polycyclic aromatic hydrocarbons (PAH) in a used lubricant composition, in which said used lubricant composition passes over activated carbon, said method not comprising a solvent extraction step.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for lowering the content of polycyclic aromatic hydrocarbons (PAHs) in a used lubricant composition, comprising the passing of said used lubricant composition over activated carbon, said method not comprising a solvent extraction, the quantity of activated carbon applied being between 0.5 and 60 g per litre of lubricant composition, wherein the method further comprises prior distillation of the used lubricant composition. 2. The method according to claim 1 , wherein the quantity of activated carbon used is between 1 and 50 g per litre of lubricant composition. 3. The method according to claim 1 , wherein the activated carbon is characterized by a density of between 200 and 500 kg/m 3 . 4. The method according to claim 1 , further comprising prior filtering of the used lubricant composition. 5. The method according to claim 1 , wherein the PAH is benzo-a-pyrene. 6. The method according to claim 1 , further comprising before the passing of said used lubricant composition over activated carbon: one or more distillations; and filtering. 7. A method for preparing a lubricant composition comprising less than 100 ppb of each of the following PAHs : chrysene, benzo[b]fluoranthene, benzo[j]fluoranthene, benzo[k]fluoranthene, benzo[e]pyrene, benzo[a ]pyrene, dibenz[a,h]anthracene, benz[a ]anthracene, from a used lubricant composition, comprising the passing of said used lubricant composition over activated carbon. 8. The method according to claim 7 , wherein the PAH is benzo-a-pyrene. 9. The method according to claim 7 , further comprising prior filtering of the used lubricant composition. 10. The method according to claim 7 , further comprising before the passing of said used lubricant composition over activated carbon: one or more distillation stepsdistillations; and filtering.
Assignees
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Classifications
using distillation processes; devices therefor · CPC title
- C10M175/0008Primary
with the use of adsorbentia · CPC title
used as base material · CPC title
comprising free carbon; comprising carbon obtained by carbonising processes · CPC title
by filtration and centrifugation processes; apparatus therefor · CPC title
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- What does patent US11078440B2 cover?
- The invention relates to a method for lowering the content of polycyclic aromatic hydrocarbons (PAH) in a used lubricant composition, in which said used lubricant composition passes over activated carbon, said method not comprising a solvent extraction step.
- Who is the assignee on this patent?
- Total Marketing Services
- What technology area does this patent fall under?
- Primary CPC classification C10M175/0008. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 03 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).