RU2088625C1 - Composition for removing asphaltene-resin-paraffin depositions - Google Patents

Abstract

FIELD: petroleum industry. SUBSTANCE: composition has the following components, wt. -%: product of condensation of saturated acid and mono- or diethanolamine, or morpholine at mole ratio = 1:1, or product of condensation of saturated acid and triethanolamine, or technical triethanolamine at mole ratio saturated acid: triethanolamine or technical triethanolamine = (1:1)-(2:1), 0.001-5, and hydrocarbon solvent, the balance. Preferable variant of invention is composition that involves, wt.-%: condensation product, 0.001-5; low-molecular carboxylic acid, 0.0001-1; and hydrocarbon solvent, the balance. EFFECT: improved quality and effectiveness of composition. 2 cl, 2 tbl

Description

 The invention relates to the oil industry and can be used to remove asphaltene-resin-paraffin deposits (paraffin) in the process of oil production.

A known composition for removing asphaltene-resin-paraffin deposits, including a hexane fraction and a heavy gasoline pyrolysis resin, boiling above 150 ^o C (ed. St. N 1756328, C 09 K 3/00, 1992). However, this composition is not effective enough for paraffin paraffin wax.

 A known composition for removing asphaltene-resin-paraffin deposits, including the hexane fraction and ethyl benzene fraction (ed. St. N 1620465, C 09 K 3/00, E 21 B 37/06, 1991). This composition is ineffective for AFS with a high content of asphaltenes.

 Closest to the invention is a composition for removing asphaltene-resin-paraffin deposits containing a hydrocarbon solvent gas gasoline, a light pyrolysis resin and an oil-soluble surfactant additive (ed. St. N 1060666, C 09 K 3/00, 1983). However, this composition is not effective enough for deposits with a high content of asphaltenes and paraffin.

 The basis of the invention is the creation of a composition for removing asphaltene-resin-paraffin deposits, with high removal efficiency of deposits with a high content of asphaltenes and paraffins.

 The problem is solved in that the composition for removing asphaltene-resin-paraffin deposits, including a hydrocarbon solvent and an additive, contains as an additive the condensation product of fatty acid and mono- or diethanolamine, or morpholine in a 1: 1 molar ratio, or the condensation product of fatty acid and triethanolamine, or technical triethanolamine in a molar ratio of fatty acid: technical triethanolamine or technical triethanolamine (1: 1) - (2: 1); in the following ratio of components, in wt.

Condensation Product Above 0.001 5
Hydrocarbon solvent
An advantageous embodiment of the invention is a composition comprising a condensation product of a fatty acid and mono- or diethanolamine, or morpholine in a 1: 1 molar ratio, or triethanolamine, or technical triethanolamine in a molar ratio of fatty acid: technical triethanolamine or technical triethanolamine ((1: 1) - ( 2: 1), and a hydrocarbon solvent and additionally low molecular weight carboxylic acid in the following ratio of components, in wt.

Condensation Product Above 0.001 5
Low molecular weight carboxylic acid 0.0001 1
Hydrocarbon solvent
The additional introduction of low molecular weight acid allows the condensation product to be brought into a cationic state, which improves the dispersion of asphaltenes.

 The condensation product of fatty acid and mono- or diethanolamine, or morpholine in a molar ratio of 1: 1, triethanolamine, or the condensation product of fatty acid and industrial triethanolamine is obtained in a known manner: by the reaction of a fatty acid and an aliphatic amine or amino alcohol at elevated temperature (Schwartz A. Perry G. Surfactants and detergents, M. IIL, 1960, p. 555).

To obtain the condensation product, synthetic fatty acids (FFA) of the fraction C ₁₆ -C ₂₂ , or FFA of the fraction C ₁₀ -C ₁₆ , or FFA of the fraction C ₁₇ -C ₂₀ , or FFA of the fraction C ₂₁ -C ₂₅ (GOST 23239-78 or TU 3810739-83) or oleic acid (GOST 7580-91 or TU 020700-7-9 (olein B-115) or stearic acid (GOST 6484-64 (stearin).

 Monoethanolamine (MEA) (TU 6-02-915-84), diethanolamine (DEA) (TU 6-09-2562-77), reactive triethanolamine (TEA), or technical triethanolamine (TU 6-02-916-84), morpholine (TU 6-09-649-85).

 As a hydrocarbon solvent, the proposed composition contains a mixture of saturated hydrocarbons extraction gasoline (TU 38101303-72) or BR-1 gasoline (galosh gasoline) (TU 38101303-72) or a gasoline-solvent solvent BR-2 (GOST 443-76) or unstable gasoline (TU 38101524-93) or a wide fraction of light hydrocarbons (TU 38101524-93) or kerosene (OST 3801407-86) or nefras A-63/75 (OST 3801199-80) or nefras C2-80 / 120 (GOST 443 -76) or n-hexane.

 Acetic acid (GOST 19814-76) or acrylic acid (TU 6-01-635-76) or maleic acid (GOST 9803-75) or methacrylic acid (TU 6-02-59-) are used as low molecular weight mono- or dicarboxylic acid. 89).

 Example 1 (prototype).

 0.3 g of OP-10 and 39.7 g of gasoline are added to 60 g of light pyrolysis resin. The mixture is stirred until smooth.

 Example 2 (proposed).

140.5 g of synthetic fatty acid fractions C ₁₆ -C ₂₂ are mixed with 30.5 g of monoethanolamine. The mixture is heated at 190 ^° C. until water is completely distilled off. The resulting product is a condensation product of FFA and monoethanolamine in a molar ratio of 1: 1.

 To 0.001 g of the condensation product in a 1: 1 molar ratio, 99.999 g of unstable gasoline is added. The mixture is stirred until a homogeneous product.

 Examples 3 22, 26 28 are performed analogously to example 2, changing the qualitative and quantitative ratio of the components.

 Example 23

144.5 g of oleic acid (olein B-115, acid number 194.14) is mixed with 74.5 g of triethanolamine. The mixture is heated at 210 ^° C. until water is completely distilled off. The resulting product is a condensation product of oleic acid and triethanolamine in a molar ratio of 2: 1.

 To 0.001 g of the condensation product, 99.999 g of unstable gasoline is added. The mixture is stirred until a homogeneous product.

 Examples 24, 25, 72 74 perform analogously to example 23, changing the qualitative and quantitative ratio of the components.

 Example 29

73.1 g of FFA of the C ₁₆ -C ₂₂ fraction are mixed with 20 g of commercial triethanolamine. The mixture is heated at 210 ^° C. until water is completely distilled off. The resulting product corresponds to the condensation product of FFA and TEA technical.

 To 0.001 g of the condensation product, 99.999 g of unstable gasoline is added. The mixture is stirred until a homogeneous product.

 Examples 30 to 50 perform analogously to example 29, changing the qualitative and quantitative ratio of the components.

 Example 51

 To 0.001 g of the condensation product of oleic acid (olein B-115) and technical triethanolamine add 0.0001 g of acetic acid and 99.9989 g of unstable gasoline. The mixture is stirred until a homogeneous product.

 Examples 52 71 perform analogously to example 51, changing the ratio of components.

 The proposed composition is tested for the effectiveness of the removal of paraffin deposits according to the method developed at the Research Institute of Oil and Gas Industry. For testing, take the following paraffin paraffin sediment (see table. 1).

The prepared paraffin sample is filled into a cylindrical shape 16 mm high, cooled for 2 hours, then squeezed into a pre-weighed basket from a brass mesh with a mesh size of 1.5 x 1.5 mm. The size of the basket is 70x15x15 mm. A basket with an AFS sample is weighed and the weight of an AFS sample is determined to the third decimal place. A basket with an AFS sample is placed in a 100 ml glass sealed cell in which a solvent sample (60 ml) is poured. The dissolution time is maintained for 3 hours, the dissolution temperature is maintained in a thermostat with an accuracy of ± 0.2 ^o C.

 After 3 hours, the basket is removed and placed in an extractor connected to a water-jet pump. The residual pressure in the extractor is 0.25 mm / Hg. Drying the baskets with the remainder of the paraffin is continued to constant weight. The mass of the AFS residue in the basket is calculated to the third decimal place.

The mass of paraffin, dissolved in a solvent, is calculated to the third decimal place by the difference:
m _ref m _ost ,
where m _{ref is the} mass of the initial paraffin sample, g;
m _{ost the} mass of the rest of the paraffin in a basket, g

 The removal efficiency of paraffin is calculated by the formula in wt.

.

.

 The test results of the proposed composition and prototype in relation to the paraffin, 1, 2, 3 are given in table. 2. Data analysis table. 2 shows that the proposed composition is more effective than the prototype for deposits with a high content of asphaltenes and paraffins.

Claims (1)

 1. A composition for removing asphaltene-resin-paraffin deposits, including a hydrocarbon solvent and an additive, characterized in that as an additive it contains a condensation product of fatty acid and mono- or diethanolamine or morpholine in a molar ratio of 1 to 1, or a condensation product of fatty acid and triethanolamine or technical triethanolamine in a molar ratio of (1 2) 1, respectively, in the following ratio of components, wt. Condensation Product 0.001 5.0
Hydrocarbon solvent
2. The composition according to claim 1, characterized in that it further comprises a low molecular weight carboxylic acid in the following ratio of components, wt. Condensation Product 0.001 5.0
Low molecular weight carboxylic acid 0.0001 1.0
Hydrocarbon solvent

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