RU2104391C1 - Compound for preventing asphalteno-resin-paraffin depositions - Google Patents

Abstract

FIELD: oil production industry. SUBSTANCE: this compound can be used in processes of extracting, transporting, and storing of oil. Compound has following components: block-copolymer of ethylene and propylene oxides, oil-soluble surface-active material, monoalkyl ether of polyethylene glycol based on connection with labile atom of hydrogen, and solvent. EFFECT: high efficiency. 3 tbl

Description

 The invention relates to compositions for preventing deposits of asphaltenes, resins, paraffins and can be used in the processes of extraction, transport and storage of oil.

 A known composition for preventing asphaltene-resin-paraffin deposits, including by-products of the production of 2-ethylhexanol and butyl alcohols by the method of oxosynthesis and Diproxamine 157-65M [1]. However, the known composition has insufficiently high indicators of the effectiveness of preventing asphaltene-resin-paraffin deposits, low demulsifying effect, high reagent consumption.

 A known composition for preventing asphaltene-resin-paraffin deposition, including the product of the sequential addition of ethylene oxide and propylene to tall oil fatty alcohol, the additive is polyethylene glycol monoalkyl ether based on primary fatty alcohols ALM-10 (DS-10) or alkamon DS-10 and a solvent [2]. A disadvantage of the known composition is not sufficiently high inhibitory properties.

 Closest to the proposed one is a composition for preventing asphaltene-resin-paraffin deposits, including a block copolymer of ethylene and propylene oxides, an oil-soluble surfactant, monoalkyl ether of polyethylene glycol based on primary fatty alcohols and a solvent [3]. The disadvantages of the known composition are the lack of effectiveness of inhibition and demulsification for oils with a content of asphaltenes in a wider range.

 The basis of the invention is the creation of a composition for the prevention of asphaltene-resin-paraffin deposits, which simultaneously has a high demulsifying effect for oils with a wide range of asphaltenes in them.

The problem is solved in that the composition for preventing asphaltene-resin-paraffin deposits, including a block copolymer of ethylene and propylene oxides, an oil-soluble surfactant, a monoalkyl ether of polyethylene glycol based on a compound with a moving hydrogen atom and a solvent, as a monoalkyl ether of polyethylene glycol based on a compound with a mobile hydrogen atom, contains monoalkyl ether of polyethylene glycol based on fatty acids or primary fatty alcohols, or alkyl phenols at the following ratio of components, wt.%:
Block copolymer of ethylene and propylene oxides - 20 - 65
Oil soluble surfactant - 1 - 15
Polyethylene glycol monoalkyl ether based on a compound with a mobile hydrogen atom - 3-10
Solvent - Other
As a block copolymer, the composition contains the product of the sequential addition of ethylene oxide and propylene to ethylene diamine in methanol - Diproxamine 157-65M (D-157-65M), manufactured according to TU 38.1011128-87, or Diproxamine 157 (D-157) according to TU 6-14- 614-76, or block copolymer of ethylene and propylene oxides (Laprol 4202-20B-30 with a mass fraction of 55%) in a methanol: water mixture in the ratio 4: 1 according to TU 6-55-54-91 (Reapon 4B), or block copolymer of oxide ethylene and propylene based on ethylene or propylene glycol (SNPCH-4410) according to TU 39-05765670-OP-160-93, or block copolymer of ethylene and propylene oxides based on fatty sp mouth fraction C ₁₆ -C ₂₀ TU-39- 05765670 OP-191-94 (SNPCH-780); or a mixture of these block copolymers.

 As an oil-soluble surfactant, Dissolvan 2830 (passport of the company "Hoechst", Germany), or Dissolvan 4411 (passport of the company "Hoechst", Germany), or Dissolvan 3264 (passport of the company "Hoechst", Germany), or Prevocel NGE 8/16 - the product of the sequential addition of ethylene and propylene oxides to alkyl phenol according to TU BN-P5043-63.

As a monoalkyl ether of polyethylene glycol based on a compound with a mobile hydrogen atom, the composition contains monoalkyl ether of polyethylene glycol based on primary fatty alcohols of the general formula: C _n H _{2n + 1} O (C ₂ H ₄ O) _m H, where n = 18, m = 10 a product manufactured by the domestic industry under the name syntanol ALM-Yu (DS-10) according to TU 6-14-664-88 (TU 6-14-864-88); polyethylene glycol monoalkyl ether based on fatty acids of the general formula:
With _n H _2n COO (CH ₂ CH ₂ O) _m H, where n = 17-20, m = 6-11 - a product manufactured by the domestic industry under the name syntanox 1720-9 according to TU 6-14-293-79 or stearox -6 in accordance with GOST 8980-75; polyethylene glycol monoalkyl ether based on alkyl phenols of the general formula:
C ₉ H ₁₉ C ₆ H ₄ O (C ₂ H ₄ O) _n, where n = 10-12 Product manufactured home industry called Neonol ₉ AF AF Neonol -12 or -10 ₉ TU Z8.507-63- 171-91.

 As a solvent, the composition contains, for example, aromatic hydrocarbons: Nefras Ar 120/200 according to TU 38.101.809-90, or ethylbenzene fraction (EBP) according to TU 6-01-10-37-78, or butylbenzene fraction (BBP) according to TU 38.10297-78; or aliphatic alcohols: normal butyl (BS) according to GOST 5208-81, or isobutyl (IHD) according to GOST 9536-79, or isopropyl (IPS) according to GOST 9805-84, or methyl (MS) according to GOST 2222-78; or a mixture of an aromatic solvent and an aliphatic alcohol.

 An analysis of the known solutions selected in the search process showed that in science and technology there is no object similar in the claimed combination of features and the presence of the above properties and advantages, which allows us to conclude that the invention meets the criteria of "novelty" and "inventive step".

 To prove the compliance of the invention with the criterion of "industrial applicability" we give examples of the preparation of compositions that are prepared by sequential mixing of the components.

 Example 1 (prototype). To 5 g of syntanol ALM-10 add 25 g of diproxamine D-157, mix, then add 15 g of Dissolvan 2830, mix, then add 55 g of methyl alcohol.

 Example 2 (proposed). To 10 g of syntanol ALM-10 add 20 g of diproxamine D-157, mix, then add 15 g of dissolvan 2830, mix and add 55 g of methyl alcohol. The mixture is stirred until smooth.

 Examples 3 to 20 perform analogously to example 2, changing the qualitative and quantitative ratio of the components. The composition options are given in table. one.

The resulting composition is a liquid with a pour point of (-40) to (-60) ^o C, a viscosity of 8 to 12 mm ² / s, a density of 920 to 950. The proposed composition does not exfoliate during storage and use.

 The effectiveness of the prevention of paraffin is determined by the method of "Evaluating the effectiveness of paraffin inhibitors of complex or multiphase effect on the washing of an oil film", developed at the Research Institute of Oil and Gas and the method of the "cold disk" (Journal of Canadian petrol technol., V.25, issue 4.s. 40-44). The dosage of the reagent is 25 - 100 g / t.

где Э - эффективность ингибитора, %;
М_о - масса парафиноотложений в контрольном опыте;
М_п - масса парафиноотложений при использовании ингибитора, г.The effectiveness of inhibition of paraffin by the method of "cold disk" is determined by the difference in the mass of deposits on the disk before and after treatment with the inhibitor. Prepare two beakers with 100 ml of oil saturated with paraffin. In one of them, a dosed amount of the inhibitor is introduced by a microsyringe or micropipette and mixed. Oil saturated with paraffin, from a glass to the surface of the "cold disk" comes from a hose connected to a perilstatic pump. The surface temperature of the disk is maintained below the temperature at which crystallization of paraffin from oil begins. After the oil drains from the disk, the paraffin deposits with a spatula are removed into a pre-weighed cuvette. The effectiveness of inhibition is determined by the formula

where E is the inhibitor efficiency,%;
M _about - the mass of paraffin deposits in the control experiment;
M _p - the mass of paraffin deposits when using an inhibitor, g

 The tests are carried out on oil 1.2 with the content of asphaltenes, resins, paraffins in the ratios given in table 2.

 The test results of the effectiveness of the prevention of paraffin are presented in table.3.

The demulsifying effect of the proposed composition is determined by the technique developed at the Research Institute of Oil and Gas Industry. The proposed composition is introduced into the natural emulsion, the mixture is shaken on a Wagner laboratory shaker for 30 minutes with an amplitude of 6-7 cm and a number of double strokes of 120 / min at room temperature. Then thermostat for 2 hours at 20 ^o C and 2 hours at 60 ^o C and measure the amount of released water.

 The determination of the residual water content in oil is carried out in accordance with GOST 14870-77 by the Dean-Stark method.

 The tests are carried out on oil 1.2.

 The data table. 3 show an increase in the effectiveness of preventing paraffin and demulsifying effects of the proposed composition compared with the prototype for oil with a content of asphaltenes in a wider range.

Claims (1)

 A composition for preventing asphaltene-tar-paraffin deposits, including a block copolymer of ethylene and propylene oxides, an oil-soluble surfactant, a polyethylene glycol monoalkyl ether based on a compound with a mobile hydrogen atom and a solvent, characterized in that it contains a mobile hydrogen atom based on polyethylene glycol monoalkyl ether polyethylene glycol monoalkyl ether based on fatty acids or primary fatty alcohols or alkyl phenols in the following ratio and components, wt. Block copolymer of ethylene and propylene oxides 20 65
Oil soluble surfactant 1 15
Polyethylene glycol monoalkyl ether based on a compound with a mobile hydrogen atom 3 10
Solvent Rest

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