The composition for removing asphaltene-coloperatingsystems deposits
(57) Abstract:The invention relates to the oil industry and can be used to remove asphaltene-coloperatingsystems deposition during oil extraction. The composition contains, wt%: hydrocarbon solvent 30-50, glycol 5-15, methanol - rest. The technical result - the creation of a composition having a high dissolving power with respect to asphaltene-coloperatingsystems sediments with a high content of paraffin, the drop in oil wells with high gas factor having a low pour point. table 1. The invention relates to the chemical industry and can be used to remove asphaltene-coloperatingsystems sediments (ASPHO) generated by oil production.Known composition for removing ASPHO, including acetone and heavy pyrolysis resin (ed. St. N 1778127, MKI C 09 K 3/00, 1992). This composition is not effective enough.Known composition to remove asphaltene-resin-paraffin deposits, including non-ionic surfactant - sintana DC-10 and an aromatic solvent (patent RF N 2055088, MKI C 09 K 3/00, 1996). However, this is closest to the proposed invention is a composition for removing asphaltene-coloperatingsystems deposits, including vysokoavtomatizirovannyh gasoline fraction, methanol, calcium chloride and monoalkyl ether of polyethylene glycol - OP-10 (ed.St. N 1808854, MKI C 09 K 3/00, 1993). The disadvantages of this structure are: high pour point, not allowing you to use it at low temperatures; corrosivity, due to the high moisture absorption calcium chloride; insufficient removal efficiency ASPHO.The present invention is the task of creating a composition having a high dissolving power with respect to asphaltene-coloperatingsystems sediments with a high content of paraffin, the drop in oil wells with high gas factor having a low pour point.The problem is solved so that the composition for removing asphaltene-coloperatingsystems deposits, including hydrocarbon solvent and methanol, further comprises a glycol in the following ratio, wt.%:
The hydrocarbon solvent is 30-50
Methanol - Rest
As the hydrocarbon solvent can be used, for example:
Fraction of ethylbenzene (EB is The 38.101809-90, or a heavy oil solvent Nefras-And-150/330 on THE 38.1011049-98, or isopropylbenzene technical (UPS) specifications 38.402-62-140-92, or toluene oil GOST 14710-78, or their mixture with hexane fraction (GF) TU 2411-032-05766801-95 or fraction hexane-heptane (GGD) TU 38.1011359-91.As the glycols used, for example, monoethylene glycol (MEG) according to GOST 19710-83, or diethylene glycol (deg) according to GOST 10136-77, or triethylene glycol (TEG) TU 6-01-5-88, or polyglycols peeled (PEG) TU 6-15-1761-94.Apply the methanol produced according to GOST 2222-78.The analysis selected in the search process known technical solutions showed that in science and technology there is no object, similar to the claimed combination of features and advantages, which allows to make a conclusion on compliance with the patentability criteria of "novelty" and "inventive step".To prove compliance of the proposed solution the criterion of "industrial applicability" cited specific examples of the preparation of the composition.Example 1 (prototype).Example 2 (proposed).To 50 g of nefras-And-120/200 add when mixing 45 g of methanol and then 5 g of monoethylene glycol. The mixture was thoroughly stirred to obtain ognennoe the ratio of the components.The resulting composition is a liquid colourless to light yellow color with a density of more than 830 kg/m3, pour point below minus 40oC.Prepared according to examples 1 to 16 compounds and their effectiveness is shown in the table.The effectiveness of the proposed composition is estimated by the solubility ASPHO as follows: prepare the emulsion of paraffin oil fields 1 and water in the ratio of deposits: water is 1:1. Thus prepared emulsion at low temperatures is a model ASPHO produced in oil wells with high Gor. Oil field 1 contains, wt%: paraffin 6 - 10; resins silikagelevye 3,42 - 6,89; asphaltenes to 0.17 to 0.97; sulfur 0,7 - 1,21; water 1 - 2. The gas factor is 285 m3/so the oil Density 820 kg/m3.Emulsion ASPHO placed in a facility for the testing of chemicals for washing ASPO and the temperature of the emulsion 25oC and the "cold" cylinder minus 5oC stand for 30 minutes. Then the cylinder is released with it ASPHO weighed and placed in a reagent volume of 300 ml, temperature-controlled at a temperature of minus 5oC, and it is kept in the reagent for 30 minutes. Then again, the mass of dissolved ASPHO, g;
M2the mass deposited on the surface of the cylinder ASPHO, ,The results are shown in the table.As can be seen from the table, the proposed structure provides almost complete removal ASPHO and higher efficiency than the composition of the prototype. The composition for removing asphaltene-coloperatingsystems deposits, including hydrocarbon solvent and methanol, characterized in that it further comprises a glycol, in the following ratio, wt.%:
The hydrocarbon solvent is 30 - 50
Glycol - 5 - 15
Methanol - Ostalnoe
FIELD: soft abrasive materials based on mixed aluminum and iron oxides.
SUBSTANCE: method includes blending of raw components and subsequent heat treatment. Solutions of aluminum and iron sulfate with ammonia bicarbonate admixture heated to 40-600C are used as raw materials to produce slurry of aluminum and iron bicarbonates. Precipitate is separated by filtration, washed and dried. Heat treatment is carried out at 1150-12000C to provide solid solution expressed by general formula Al2-xFexO3, wherein x = 0.30-0.37. Mass part of iron oxide in finished product is 20-25 mass %. Abrasive materials of present invention are useful for finished polishing of metal parts, have polishing ability of 0.37-0.40 mg/min.cm2, provide roughness RZ = 0.07-0.08 mum after polishing and 85-90 %-yield of high-precision accepted metal parts.
EFFECT: environmentally friendly abrasive materials of improved quality.
1 cl, 3 ex, 1 dwg