FIELD: oil purification methods. SUBSTANCE: polluted petroleum derivative is mixed with liquid aliphatic solvent in presence of flocculation-enhancing reagent and is further poured into extraction vessel. Gas is injected into bottom part of the vessel in the form of small bubbles. Flocculated impurities are then separated from solution. Apparatus contains high-pressure vessel connected to polluted oil and solvent sources and also to source of flocculation-enhancing reagent. Vessel has pollutant-emptying opening in its bottom part, pure product and solvent-decantation opening, and gas outlet hole connected with gas inlet hole so providing recirculation of gas. Method, in particular, is adequate for restoring exhausted lubricating oils. Purification by-product in the form of asphalt filler is itself commercial product. EFFECT: increased economical efficiency of process. 40 cl, 6 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PETROLEUM RAW DEASPHALTIZING | 1993 |
|
RU2112010C1 |
| METHOD OF PURIFICATION OF THE WASTE OILS USING EXTRACTION BY DISSOLVENTS | 2002 |
|
RU2288946C2 |
| METHOD AND SYSTEM DESIGNED FOR SEPARATION OF LIGHT HYDROCARBONS | 2019 |
|
RU2800870C2 |
| METHOD OF REUSING OIL SLIME | 2000 |
|
RU2172764C1 |
| PROCEDURE FOR "DRY" PROPANE DE-ASPHALTISATION OF OIL RESIDUES | 2009 |
|
RU2436836C2 |
| METHOD AND DEVICE FOR HYDROGENATION OF HEAVY OIL IN FLUIDIZED BED | 2017 |
|
RU2681078C1 |
| LIGHT PETROLEUM PRODUCTS FROM HEAVY OIL PRODUCTION METHOD AND DEVICE BY THE HYDROGENATION IN THE FLUIDIZED BED METHOD | 2017 |
|
RU2681527C1 |
| METHOD OF DEASPHALTING OF PETROLEUM RESIDUE | 1998 |
|
RU2167186C2 |
| METHOD FOR THERMOCHEMICAL CLEANING OF RESERVOIRS FOR STORING PETROLEUM PRODUCTS | 1994 |
|
RU2106211C1 |
| METHOD AND APPARATUS FOR TREATMENT, SORTING AND RECYCLING OF OIL-CONTAINING DISCHARGED CATALYST | 2017 |
|
RU2748501C1 |
