RU2124552C1 - Composition for breaking water-oil emulsions inhibiting asphaltene- tar-paraffin deposits - Google Patents

Abstract

FIELD: oil and gas production. SUBSTANCE: demulsifying composition may be utilized in oil collection and transport system for pipeline demulsification of oil emulsions and also in oil treatment system for dehydrating and desalting oil while simultaneously inhibiting asphaltene-tar-paraffin deposits. Composition contains 15 to 35% of product of hydroxyalkylation of compound with active hydrogen atom, 5 to 15% of methyldiethylalkoxyammonium methyl sulfate or bis(alkylpolyoxyethylene)phospatoxyphos, and organic solvent. EFFECT: increased demulsifying activity. 4 tbl

Description

 The invention relates to compositions for breaking oil-water emulsions, inhibiting asphaltene-resin-paraffin deposits, and can be used in a system for collecting and transporting oil emulsions, as well as in a system for preparing oil for dehydration and desalting of oil while inhibiting asphaltene-resin-paraffin deposits (ASPO).

 Known demulsifier of oil-water emulsions based on polypropylene glycol ethers of polyethylene glycol or its derivatives with a molecular weight of 2500-10000 (A.S. N 171065, MKI C 10 G 33/04, 1965). This demulsifier is not effective enough and does not have an inhibition of paraffin.

 Known demulsifier of oil-water emulsions based on nonionic surface-active mono- and dialkylphenols (Levchenko D.N. et al. Oil emulsions with water and methods for their destruction. M: Chemistry, 1967, p. 110). However, this demulsifier is not suitable for the preparation of oil, because the process proceeds with excessive consumption rates at a relatively high temperature and a long settling time.

 Closest to the proposed technical solution is the composition of the demulsifier of oil-water emulsions, which inhibits asphaltene-resin-paraffin deposits - the product of the addition of ethylene and propylene oxides to ethylene diamine in methanol - diproxamine-157-65M (TU 6-16-617-76). However, this composition is not effective enough for oils with a high content of asphaltenes, resins and paraffins.

 The basis of the present invention is the creation of a demulsifier composition of oil-water emulsions, inhibiting asphaltene-resin-paraffin deposits and applicable to oils with a high content thereof.

где
4m = 60-62;
4n = 27-28,
в виде 65%-ного раствора в метаноле, - Дипроксамин-157-65М по ТУ 6-16-617-76, или продукт присоединения окисей этилена и пропилена к глицерину - Лапрол 5003-2-15 по ТУ 2226-006-10488057-94, или оксиэтилированные моноалкилфенолы на основе тримеров пропилена - неонол АФ₉-12 по ТУ 38.507-63-300-93 или неонол АФ₉-6 по тому же ТУ, или их смеси.The problem is solved in that the composition for the destruction of water-oil emulsions, inhibiting asphaltene-resin-paraffin deposits, including the product of the oxyalkylation of compounds with a mobile hydrogen atom in an organic solvent, additionally contains alkamon D - methyldiethyl-alkoxymethyl ammonium methyl sulfate of the general formula
[C _10-18 H _21-37 OCH ₂ N (CH ₃ ) (C ₂ H ₅ ) ₂ ] ⁺ SO $\genfrac{}{}{0ex}{}{\text{-}}{\text{4}}$ CH ₃
or oxyphos KD-6 - bis (alkylpolyoxyethylene) phosphate of the general formula
[C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH,
Where
n = 8-10,
m = 6,
in the following ratio of components, wt.%:
Oxyalkylation product of a compound with a mobile hydrogen atom - 15-35
Alkamon D or oxyphos KD-6 - 5-15
Organic Solvent - Else
As a product of oxyalkylation of a compound with a mobile hydrogen atom, the composition contains the product of the addition of ethylene and propylene oxides to ethylene diamine of the general formula

Where
4m = 60-62;
4n = 27-28,
in the form of a 65% solution in methanol, - Diproxamine-157-65M according to TU 6-16-617-76, or the product of addition of ethylene and propylene oxides to glycerin - Laprol 5003-2-15 according to TU 2226-006-10488057- 94, or ethoxylated monoalkylphenols derived from propylene trimer - AF ₉ -12 neonol TU 38.507-63-300-93 or neonol AF -6 ₉ according to the same specifications, or mixtures thereof.

Methyldiethylalkoxymethylammonium methyl sulfate of the general formula [C _10-18 H _21-37 OCH ₂ N (CH ₃ ) (C ₂ H ₅ ) ₂ ] ⁺ SO $\genfrac{}{}{0ex}{}{\text{-}}{\text{4}}$ CH ₃ has the technical name Alkamon D and is produced according to TU 6-14-19-208-86.

Bis (alkylpolyoxyethylene) phosphate of the formula
[C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH,
Where
n = 8-10,
m = 6,
has the technical name oxyphos KD-6 and is produced according to TU 6-02-1148-78.

 As a solvent, the composition of the demulsifier contains a mixture of aromatic hydrocarbons - Nefras Ap 120/200 according to TU 38.101809-90, or ethylbenzene fraction (EBP) according to TU 38.30225-81, or isopropyl alcohol (IPA) according to GOST 9805-84, or butyl alcohol (BS ) according to GOST 5208-81, or mixtures thereof.

 An analysis of the known technical solutions selected in the search process showed that in science and technology there is no object similar in terms of the claimed combination of features and advantages, which allows us to conclude that the criteria of “novelty” and “inventive step” are met.

 To prove the compliance of the proposed solution with the criterion of "industrial applicability" we give examples of the preparation of a demulsifier.

 Example No. 1 (prototype).

 Diproxamine-157-65M is taken in finished form.

 Example No. 2 (proposed).

To 15 g of laprol 5003-2-15 add 15 g of alkamone D, mix up to 40-50 ^o C, then add 70 g of Nefras Ap 120/200 and mix until a homogeneous solution is obtained.

 Examples NN 3-30 are performed analogously to example N 2, changing the quantitative and qualitative ratio of the components.

 Example No. 31.

To 15 g Laprol 5003-2-15 added 10 g neonol AF ₉ -12 and 10 g of D alkamona, the mixture was warmed up to 40-50 ^o C stirring is added 13 g of iso-propyl alcohol and then 52 g of petroleum ether Ap 120/200. Stir until a homogeneous mass.

 Examples NN 32-37 perform analogously to example N 31, changing the quantitative and qualitative ratio of the components.

 Options for the composition of demulsifiers are shown in table 1. The prototype is also presented there.

The resulting demulsifier is a liquid from light yellow to brown in color with a density of d = 860 - 1100 kg / m ³ and a viscosity of η = 15 - 100 mm ² / s at 20 ^o C. Setting point = (-40) - (-60 ) ^o C.

 The proposed demulsifier is tested on oils 1 and 2 with a high content of asphaltenes, resins and paraffins, are shown in table 2.

The demulsifying effect is determined by the technique developed at the Research Institute of Oil and Gas Industry. The test reagent is introduced into the natural emulsion of a particular deposit in an amount of 0.02%. The mixture is shaken in a Wagner laboratory shaker for 30 minutes with an amplitude of 6-7 cm and the number of double strokes in 120 minutes at room temperature. Then thermostat for 2 hours at a temperature of 20 ^o C and for 2 hours at a temperature of 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 test results are shown in table 3.

 The effectiveness of preventing paraffin deposits is determined by the methodology "Evaluation of the effectiveness of paraffin inhibitors with a complex effect on the washing of an oil film, washing and dispersion of paraffin wax" developed at the Research Institute of Oil and Gas Industry.

 The tests are carried out on oils 1 and 2, the composition of which is presented in table 2. The test results are shown in table 4.

 Analysis of the data in tables 3 and 4 shows that the proposed demulsifier has a high demulsifying and anti-paraffin effect and is applicable to oils with a high content of asphaltenes, resins and paraffins.

Claims (1)

Composition for breaking oil-water emulsions, inhibiting asphaltene-resin-paraffin deposits, including the product of oxyalkylation of a compound with a mobile hydrogen atom in an organic solvent, characterized in that it additionally contains methyl diethylalkoxymethyl ammonium methyl sulfate of the general formula

or bis (alkylpolyoxyethylene) phosphate of the general formula
[C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH - oxyphos KD-6,
where n = 8 to 10;
m = 6,
in the following ratio of components, wt.%:
Oxyalkylation product of a compound with a moving hydrogen atom - 15 - 35
Alkamon D or oxyphos KD-6 - 5 - 15
Organic Solvent - Remnant

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