RU2652712C1 - Demulsifying composition and a method of its use - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention is aimed to the create an environmentally friendly demulsifying composition containing low levels of surfactants in environmental responsible solvent bases or bases similar to oil components and consistent with cationic surfactants present in other oil treatment chemicals. Demulsifying composition comprising a mixture of cyclic oxyalkylated alkanes in an amount of at least three components is described, total content of which in a mixture is not less than 80 % by weight, obtained by reduction and subsequent oxyalkylation with ethylene oxide and propylene oxide from 2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethanol, 2-(7,7-dimethylbicyclo[4.1.0]hept-3-en-3-yl)ethanol, 2-(4-(prop-1-en-2-yl)cyclohex-1-en-1-yl)ethanol, formed as a result of the Prins reaction, the rest is gum turpentine. There is also described a method for a water-oil emulsion breaking.

EFFECT: demulsifying composition suitable for the water-oil emulsion breaking is obtained.

4 cl, 1 tbl

Description

The invention relates to the field of petrochemistry, namely to demulsifiers of oil-water emulsions. To prevent the formation, as well as to destroy the already formed oil emulsions, demulsifiers are widely used - surface-active substances (surfactants), which, unlike natural emulsifiers, contribute to a significant reduction in the stability of oil emulsions.

The effect of the demulsifier on the oil emulsion is based on the fact that the demulsifier, adsorbed on the oil-water interface, displaces and replaces the less active surface-active natural emulsifiers. Natural emulsifiers are natural surfactants found in oil (asphaltenes, naphthenes, resins, paraffins) and in produced water. Demulsifiers should have more activity than emulsifiers. The film formed by the demulsifier is less durable. As the demulsifier accumulates on the surface of the water droplets, the forces of mutual attraction arise between the latter. As a result, small dispersed water droplets form large droplets (flakes), in which films around water globules are usually preserved. In the process of flocculation, the surface film of water globules becomes quite weakened, it is destroyed and the water globules merge. Active demulsifiers provide not only the convergence of dispersed water droplets in the emulsion, but also destroy the surrounding films and promote coalescence.

Demulsifiers usually consist of one or more surfactants dispersed in a solvent system and can be obtained, for example, from alcohols, fatty acids, fatty amines, glycols, and alkyl phenol condensation products. Solvent systems, in turn, generally contain aromatic distillates, including, for example, 1,2-dimethylbenzene, 1,3-dimethylbenzene and 1,4-dimethylbenzene, which can have a negative effect on health and are not environmentally friendly. In particular, such solvents may have a high content of volatile organic compounds (VOCs), which may not comply with current regulations regarding VOCs. Such solvent systems that contain aromatic-based solvents are becoming less desirable, while alternative "green" or environmentally friendly solvents are becoming increasingly attractive for various applications. Therefore, there is a need for solvent bases used for demulsification, which will have less negative impact on the environment, human health, etc., for example, which will have lower levels of toxicity and content of volatile organic substances or will fully correspond to the nature of the demulsible liquid.

The environmental impact of the extraction of crude oil is attracting more attention and is subject to observation by state regulatory authorities, as well as the public. Environmental regulatory authorities, both national and international, have determined that demulsifiers containing nonylphenyl alkoxylates and related compounds adversely affect the environment. Therefore, there is a need for oil demulsifiers that will have less negative impact on the environment, for example, have lower levels of toxicity. These include compounds based on natural substances and substances susceptible to much easier and faster enzymatic biodegradation.

Known technical solution described in patent RU No. 2510413, publ. 03/27/2014, bull. No. 9, which describes options for demulsifying compositions containing: (a) an anionic surfactant selected from the group consisting of alkyl sulfosuccinates, alkyl phosphate esters, alkyl phosphonic acids, their salts and combinations thereof; and / or (b) a nonionic surfactant selected from the group consisting of copolymers of ethylene oxide and propylene oxide, esters of ethoxylated fatty acids and polyethylene glycol, terpene alkoxylates, alcohol ethoxylates, modified alkanolamides and combinations thereof; and (c) a solvent base composition comprising a mixture of esters of dibasic acids.

The disadvantage of these demulsifying compositions containing anionic surfactants is complete incompatibility with a significant amount of field chemistry due to the presence of cationic organic compounds and, in particular, cationic surfactants.

The products of the hydrolysis of phosphorus-containing surfactants in water can cause intensive plant growth, which leads to pollution of water bodies and worsening conditions for the existence of other life forms in water.

In addition, the mixture of dibasic acid esters contained in demulsifiers easily undergoes hydrolysis and form an indestructible film of insoluble salts on the interface between the cations of divalent and trivalent metals, such as calcium, magnesium and iron.

It is known from the prior art that surfactants with a similar structure are described in the application US 2009/0048352 dated 02.19.2009, however, the composition of the demulsifier described in this solution is characterized by rather high working concentrations and components containing a double bond under the influence of atmospheric oxygen, oxidize and lose their effectiveness, leading to damage to the demulsifier. The demulsifiers described in the application US 2009/0048352 are also known in our country and are sold under the trademark RHODOCLEAN® HP (Rhodia Inc, Cranbury, N.J).

There is also known a method of breaking emulsions of oil and water, described in US patent No. 7671099 from 02.03.2010, comprising the interaction of the emulsion with a demulsifier containing terpene alkoxylate of the specified structure, and the solvent is selected from the group: glycols, glycol ethers, alcohols, water, hydrocarbons, aromatic solvents, fatty acid methyl esters, and combinations thereof.

A disadvantage of the known solution is the relatively high working concentration of the demulsifier, designed to compensate for the negative impact of the environment. Under the influence of atmospheric oxygen, components containing a double bond are oxidized and lose their effectiveness, leading to damage to the demulsifier.

The objective of the invention is to create an environmentally friendly demulsifying composition containing low levels of surfactants in environmentally friendly solvent bases or bases similar to oil components and compatible with cationic surfactants present in other reagents for oil processing.

The technical result is the destruction of the oil-water emulsion, evaluated by the following parameters:

- AFS film washing is considered to be excellent if washing of 70% of the area occurs in 30 seconds, good - in 60 seconds

- the dispersion value of 0.1-1.0 mm (excellent); the dispersion value of 1-2 mm (good)

- When evaluating the method of washing ARPD from a surface, the result is considered to be excellent if the fraction of washing from ARPD of surface S,% is 90-100, good 80-90%, satisfactory 50-80%

- Determination of the residual water content in oil is carried out in accordance with GOST 14870-77 by the Dean-Stark method for artificial emulsions 25% range from 0.14 to 0.65% mass .; for artificial emulsions 50% range from 0.1% to 0.63% of the mass .; for natural emulsions 25% range from 0.08 to 0.49% of the mass .; for natural emulsions 50% range from 0.07% to 0.44% of the mass.

This task is achieved in that the demulsifying composition, when used in an amount of from 30 ppm to 2000 ppm, includes a mixture of cyclic hydroxyalkylated alkanes, in an amount of at least three components, the total content of which in the mixture is at least 80% by weight, obtained by reduction and subsequent oxyalkylation with ethylene oxide and propylene oxide from 2- (6,6-dimethylbicyclo [3.1.1] hept-2-en-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] hept-3-ene -3-yl) ethanol, 2- (4- (prop-1-en-2-yl) cyclohex-1-en-1-yl) ethanol formed by the Prince reaction noe - turpentine. Wood or extraction turpentine, is a natural source of raw materials.

The demulsifying composition contains propylene oxide in an amount of from 10 to 30 mol per mol of the starting components.

The demulsifying composition contains ethylene oxide in an amount of from 1 to 30 mol of ethylene oxide per mole of starting components.

As an optional solvent in the proposed demulsifier can be used, methanol (MS) according to GOST 2222-78, or ethanol (ES) GOST 18300-87, or isopropanol (IPA) GOST 9805-84, or toluene GOST 5789-78, or ethylene benzene fraction (EBF) according to TU 6-01-10-37-78, or butylbenzene fraction (BBF) according to TU 38-10297-78, or xylene fraction (CF) according to (according to xylene GOST 9410-78), or nefras according to GOST 26377-84, or gum turpentine according to GOST 1571-82, or ethylene glycol monoethyl ether (MEEEG) according to TU 6-09-3222-79, or diethylene glycol monoethyl ether (MEEDEG) according to TU 6-01-575783-6-89, or monobutyl ether ethylene glycol (MBEEG) TU 6-01-646-84, or diethylene glycol monobutyl ether (MBED EG), or fatty acid methyl esters (FAME) according to GOST R 53605 / GOST R 51486-99, or fatty acid ethyl esters (EEGC) according to GOST R 51486-99, as well as their mixtures with each other or with water. The composition is effective for breaking emulsions of oil and water.

To date, numerous demulsifiers are presented designed to remove water from oil-water emulsions. Demulsifiers usually consist of one or more surfactants dispersed in a solvent system and can be obtained, for example, from the condensation products of alcohols, fatty acids, fatty amines, glycols and alkyl phenols.

Among the methods for breaking the oil emulsion used today, electrostatic separation, gravity separation, centrifugation and separation using a hydrocyclone are often used.

In such methods, the chemical composition of the demulsifier is selected so that the oil and water phases can be separated by separation methods known in the art.

Oils that contain high amounts of asphaltenes and naphthenic acids are usually called heavy, and they are difficult in the process of breaking the emulsion. These oils require certain demulsifiers to effectively break emulsions.

The environmental impact of demulsifiers remaining in the aqueous phase after separation attracts increased attention and is the subject of numerous studies. Demulsifiers containing nonylphenyl alkoxylates and related compounds, as well as cationic surfactants based on quaternary ammonium, have a harmful effect on aquatic microorganisms. Therefore, there is a need for oil demulsifiers that will be less toxic to the environment. In addition to the need for demulsifiers for oil separation, which have low toxicity and are environmentally friendly, there is a need for demulsifiers containing low levels of surfactants.

The present invention meets the above needs and includes the interaction of wood or extraction turpentine (as a natural source of raw materials) and containing three main components (total content of at least 90% by weight in natural raw materials):

- 2,6,6-trimethylbicyclo [3.1.1] hept-2-ene,

- 3,7,7-trimethylbicyclo [4.1.0] hept-3-ene,

- 1-methyl-4- (prop-1-en-2-yl) cyclohex-1-ene, in the presence of a catalyst (mesoporous iron (III) phosphate) according to the Pierce reaction with the formation of:

- 2- (6,6-dimethylbicyclo [3.1.1] hept-2-en-2-yl) ethanol,

- 2- (7,7-dimethylbicyclo [4.1.0] hept-3-en-3-yl) ethanol,

- 2- (4- (prop-1-en-2-yl) cyclohex-1-en-1-yl) ethanol,

subsequent reduction of the products on the Pd / C catalyst with gaseous hydrogen in a chloroform medium under normal conditions to:

- 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol,

- 2- (7,7-dimethylbicyclo [4.1.0] heptan-3-yl) ethanol,

- 2- (4-isopropylcyclohexyl) ethanol, and subsequent hydroxyalkylation of the reaction products with ethylene or propylene oxide to form a mixture of oxyalkylated type emulsifiers and their subsequent interaction with an oil-water emulsion, providing a method for breaking oil emulsions using demulsifiers based on natural non-toxic reagents.

Composition of reduced and alkoxylated hydroxymethylated derivatives of 2- (6,6-dimethylbicyclo [3.1.1] hept-2-en-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] hept-3-en- 3-yl) ethanol and 2- (4- (prop-1-en-2-yl) cyclohex-1-en-1-yl) ethanol:

Alkoxylated 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol from 2,6,6-trimethylbicyclo [3.1.1] hept-2-ene, depending on the feed: 50-77% mass

Alkoxylated 2- (7,7-dimethylbicyclo [4.1.0] heptan-3-yl) ethanol from 3,7,7-trimethylbicyclo [4.1.0] hept-3-ene, depending on the feed: 15-30% mass

Alkoxylated 2- (4-isopropylcyclohexyl) ethanol from 1-methyl-4- (prop-1-en-2-yl) cyclohex-1-ene, depending on the feedstock: 3-6% wt.

Natural raw materials also contain other impurities, usually in an amount of from 4 to 10% of the mass. in total.

This technical solution includes contacting the oil emulsion with alkoxylated 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] heptan-3-yl) ethanol and 2- (4-isopropylcyclohexyl) ethanol, having in the composition of the substance with the formulas (I-III) in which, the total coefficient n has a value of from 10 to 30, and m has a value of from 1 to 30. The demulsifying composition can be applied both in pure form and in solution or emulsion (in commodity form).

In the proposed technical solution when applying a composition based on a mixture of oxyalkylated products: 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] heptane-3 -yl) ethanol and 2- (4-isopropylcyclohexyl) ethanol, the phenomenon of synergy is observed, as a result of which a significantly smaller amount of starting material is required. This phenomenon is observed when the structure of surface-active substances is similar to each other and their mutual coordination at the interface. The synergy phenomenon can be quantified. This technique is described in the article “Synergies in Surfactant Mixtures”. L.P. Semikhina, E.N. Moskvina, I.V. Kolchevskaya, Chemistry, Bulletin of the Tyumen State University. 2012, No5. The same article describes the nature of this phenomenon.

In some embodiments, a mixture of two or more alkoxylated products may be used, or the alkoxylated product may be combined with one or more other surfactants; of those that are known from the existing level of technology (Phenomenon of synergism in mixtures of surface-active substances. LP Semikhina, EN Moskvina, IV Kolchevskaya, Chemistry, Bulletin of the Tyumen State University. 2012, No. 5.) This article describes that demulsifiers can be freely combined both with each other and with other field chemistry based on surfactants, provided that there is no effect of antisynergism.

Block copolymers of ethylene oxide and propylene oxide were used as nonionic surfactants in the compositions. These surfactants are known under the trademarks reapon 4B, progalite GM 20/40, dissolvan 4411, polynol, proxamine-385, laprol-6003, laprol 6003-2B-18, laprol 5003-2B-10, CTX-2124, diproxamine-157 and other

Surfactants compatible with nonionic surfactants and containing a quaternary ammonium nitrogen atom in their structure are used as ionic surfactants. Such ionic surfactants include betaines, alkyltrimethylammonium chlorides, alkyl dimethylamino oxides, etc. (oleylamidopropyl betaine (OAPB), cocamidopropyl betaine (KAPB), alkyl betaine (AB), cetyltrimethylammonium olitophenyl (methyl chloride ammonium chloride), .

The principle of operation of the demulsifying composition is based on the use of surface-active substances that allow loosening the oil-water interface and displacing natural emulsion stabilizers based on asphaltenes and solid paraffins from it. The introduction of a demulsifying composition is possible at any stage of oil production and transportation, it can also be introduced directly into the settlers.

The demulsifying composition is added to oil emulsions in concentrations from 30 to 2000 ppm (parts per million). Surfactants include one or more alkoxylated 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] heptan-3-yl) ethanol and 2- (4-isopropylcyclohexyl) ethanol and optionally one or more other surfactants. Alkoxylated derivatives in this technical solution contain from 10 to 30 hydroxypropyl and from 1 to 30 hydroxyethyl units. Links "n" and "m" may have a block distribution or be randomly distributed along the chain.

Water and other solvents used to bring the demulsifying composition to a marketable form are used in any ratio with recalculation of the load necessary to achieve the effect (achieve the desired concentration of the composition).

The following are examples to illustrate the preparation and properties of the demulsifying composition and should not be construed as limiting the scope of this invention.

Examples:

The first stage: the reaction between a mixture of 2,6,6-trimethylbicyclo [3.1.1] hept-2-ena, 3,7,7-trimethylbicyclo [4.1.0] hept-3-ena, 1-methyl-4- (prop -1-en-2-yl) cyclohex-1-ene and formaldehyde are carried out under the following conditions:

0.8 l of pine turpentine (a mixture of 2,6,6-trimethylbicyclo [3.1.1] hept-2-en, 3,7,7-trimethylbicyclo [4.1.0] hept- 3-ene, 1-methyl-4- (prop-1-en-2-yl) cyclohex-1-ene, other impurities not exceeding 10% by weight), 150 g of paraform, 500 g of mesoporous iron phosphate (X. Guo , W. Ding, X. Wang and Q. Yan, Chem. Commun., 2001, 709) and adjust the volume to 8 liters with acetoniril. The atmosphere is inert. The reaction mixture was stirred at t 80 ° C for 24 hours, then acetoniril was evaporated in vacuo and the resulting product was extracted with acetone. Then acetone is distilled off, the resulting hydroxymethylation product is used as is.

Second stage: reduction reaction of 2- (6,6-dimethylbicyclo [3.1.1] hept-2-en-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] hept-3-en-3 -yl) ethanol, 2- (4- (prop-1-en-2-yl) cyclohex-1-en-1-yl) ethanol to 2- (6,6-dimethylbicyclo [3.1.1] heptan-2- il) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] heptan-3-yl) ethanol, 2- (4-isopropylcyclohexyl) ethanol with hydrogen on palladium.

The hydroxymethylation product obtained in the first stage is placed in a 10 liter reactor (stage 1), then a catalyst, which is a palladium supported on amorphous carbon, is introduced therein with stirring and vacuum. Then there are introduced 8 liters of chloroform and hydrogen gas to an excess pressure of 10 mbar. The temperature in the reactor is maintained at 20-25 ° C, the reaction medium is stirred while hydrogen is consumed (usually less than 2 hours for 10 liters, depending on conditions) and for another 2 hours after that. The resulting product is not susceptible to oxidation by atmospheric oxygen. Chloroform is distilled off, and the resulting product is subjected to hydroxyethylation.

Third stage: oxyalkylation of a mixture of 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] heptan-3-yl) ethanol and 2- ( 4-isopropylcyclohexyl) ethanol.

Oxyalkylation was carried out in an autoclave with a stirrer and a jacket to maintain a constant temperature. The autoclave was evacuated to a residual pressure of less than 25 m bar and heated to a temperature of 150 ° C. After holding for 1 hour, the reactor was filled with nitrogen, evacuated 1 more time and cooled. 339 g (2 moles) of a mixture of 2- (6,6-dimethylbicyclo [3.1.1] heptan-2-yl) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] heptane-3- il) ethanol and 2- (4-isopropylcyclohexyl) ethanol from the previous synthesis and 2.4 g of 50% of the mass. an aqueous solution of potassium hydroxide. Then the autoclave is heated to 170 ° C and a mixture of ethylene oxide and propylene oxide is introduced at such a rate that the temperature does not exceed 180 ° C. The amount varies depending on the demulsifier. After the addition is complete, the reaction mixture is maintained at 170 ° C for 5 hours, then the product is cooled and unloaded.

Tests of demulsifying compositions are carried out on both natural and artificial emulsions.

Physico-chemical characteristics of oil:

The water content of the emulsion, 70-75% of the mass. The density at 20 ° C is 0.876-0.896 g / cm ³ . Kinematic viscosity, 22-26 mm ² / s at 20 ° C. Mass fraction of sulfur 1.31-2.60%.

- Asphaltenes: 3.22-4.00% wt.,

- Clay powder and fur. impurities: 5.78-7.41% wt.,

- Paraffins: 2.76-5.83% of the mass.

In the oil-water emulsion, the proposed demulsifying composition is dosed and shaken for 30 minutes at room temperature. Then thermostat at 40 ° C for 2 hours and measure the amount of freely 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.

Evaluation of the effectiveness of the samples for the prevention of paraffin is carried out according to the following indicators: for washing the film of oil with this sample; the value of the dispersion of paraffin in the medium of the sample; for washing AFS.

Determination of washing film of oil is carried out in the following order. Oil, treated with a reagent at a rate of 50 ppm on an active basis, is poured into a glass tube to a certain mark and left to stand for 20 minutes. Then the oil is poured, and the formation water is poured to half the tube, oil is added to the mark, the tube is closed with a polished stopper. Then, at the same time as the stopwatch is turned off, the tube is turned over. Oil and water vary in volume. The area of the washing surface of the tube occupied with produced water instead of oil is fixed.

The result is considered to be excellent if washing of 70% of the area occurs in 30 seconds, good in 60 seconds and satisfactory in 180 seconds.

Dispersion of paraffin and surface washing.

These two methods are combined in one laboratory procedure and are carried out in a conical flask in which 50 ml of produced water is placed, the test reagent is dosed. Paraffin deposits weighing 0.5 g are placed in the same flask. The contents of the flask are heated until paraffin is melted (60-90 ° C), and then cooled by stirring. After cooling to 20-25 ° C, the particle size of the paraffin dispersion and the surface area of the flask not coated with (coated) with paraffin deposits (S%) are measured. According to the methodology, the result is considered excellent with a dispersion value of 0.1-1.0 mm, good with a dispersion value of 1-2 mm, satisfactory with a dispersion value of 2-5 mm, unsatisfactory with a dispersion value> 5 mm. When evaluating the AFSA washing method from a surface, the result is considered to be excellent if the proportion of washing from the AFSA of the surface S,% is 90-100%, good 80-90%, satisfactory 50-80% and poorly <50%.

The degree of wastewater treatment is determined by the method described in OST 39-133-81 "Water for waterflooding of oil reservoirs. Determination of oil content in field wastewater", and evaluated by the oil content in wastewater.

The test results of demulsifying effectiveness, the effect of inhibiting asphaltene-resin-paraffin deposits and the degree of purification of water from oil for the proposed demulsifier are presented in the table. Analysis of the data given in the table shows that the proposed demulsifier has a higher demulsifying effect and inhibitory effect from asphaltene-resin-paraffin deposits in comparison with the prototype.

Examples 1-3 demonstrate the behavior of the demulsifying composition in amounts less than stated.

Examples 1-10 demonstrate the dependence of the quality of the demulsifying composition depending on the concentration used.

Examples 11-14 show the operation of the extreme content variants of the composition of the demulsifier.

Examples 15-55 show the operation of various compositions of the composition of demulsifiers at the optimal concentration in the ratio of the amount of demulsifying composition / effectiveness.

Examples 56-66 show the operation of the demulsifier composition of the prototype: RHODOCLEAN® HP.

Example 67 - the ratio of oleylamidopropyl betaine: demulsifier is 0.05: 0.95;

Example 68 - the ratio of cetyltrimethylammonium chloride: demulsifier is 0.06: 0.94;

Example 69 - the ratio of oleylamidopropyl dimethylamino oxide: demulsifier is 0.10: 0.90;

Example 70 - the ratio of cocamidopropylbetaine: demulsifier is 0.04: 0.96;

Example 71 - the ratio of oleylamidopropyltrimethylammonium chloride: demulsifier is 0.08: 0.92;

Examples 67-71 demonstrate compatibility with cationic surfactants containing a quaternary ammonium nitrogen atom.

The present invention has major applications in the oil industry - for example, in the destruction of crude oil emulsions, however, this invention can also be used in other industries, for example, in the pharmaceutical industry, healthcare, cosmetology and care, etc.

The specific examples given in this application and the link to specific options are provided only to illustrate the principles and applications of the present invention. Other embodiments have been proposed, and additional embodiments that may be apparent to those skilled in the art after reading and understanding this description. It is intended that all such embodiments also be included within the scope of this invention. Therefore, it should be understood that numerous modifications of illustrative embodiments can be made, and that other systems can be developed without departing from the spirit and scope of the invention, as defined in the claims.

The use of a mixture of cyclic oxyalkylated alkanes in an amount of at least three components, the total content of which in the mixture is at least 80%, obtained by reduction and subsequent hydroxyalkylation with ethylene oxide and propylene oxide from:

- 2- (6,6-dimethylbicyclo [3.1.1] hept-2-en-2-yl) ethanol

- 2- (7,7-dimethylbicyclo [4.1.0] hept-3-en-3-yl) ethanol

- 2- (4- (prop-1-en-2-yl) cyclohex-1-en-1-yl) ethanol

allowed to create an environmentally friendly demulsifying composition based on a natural source of raw materials. Due to the use of natural terpenes as initial components, the obtained demulsifier easily undergoes biodegradation. A high efficiency allows to reduce the content of surfactants to very low and environmentally friendly values of the order of 30 ppm. The use of solvent bases based on environmentally friendly solvents or on solvents that are natural components of oil allows you to remove the environmental burden on natural ecosystems in places of demulsification and preparation of marketable oil for transportation.

The use of nonionic surfactants as demulsifiers avoids the compatibility problems known for mixtures of cationic and anionic surfactants. The specified demulsifier is compatible with any industrial chemistry used for the preparation of oil.

The above examples show that at a concentration above 30 ppm, this demulsifier allows you to quickly and efficiently separate the oil-water emulsion, to wash asphalt-resin-paraffin deposition and crude oil from the surface of technological equipment.

Demulsifying composition and method for its preparation

Demulsifying composition and method for its preparation

Claims (4)

1. A demulsifying composition comprising a mixture of cyclic hydroxyalkylated alkanes in an amount of at least three components obtained by reduction and subsequent hydroxyalkylation with ethylene oxide and propylene oxide from 2- (6,6-dimethylbicyclo [3.1.1] hept-2-en-2-yl ) ethanol, 2- (7,7-dimethylbicyclo [4.1.0] hept-3-en-3-yl) ethanol, 2- (4- (prop-1-en-2-yl) cyclohex-1-en- 1-yl) ethanol formed as a result of the Prince reaction, the rest is gum turpentine. 2. The demulsifying composition according to claim 1, characterized in that it contains propylene oxide in an amount of from 10 to 30 mol per mol of the starting components. 3. The demulsifying composition according to claim 1, characterized in that it contains ethylene oxide in an amount of from 1 to 30 mol of ethylene oxide per mole of starting components. 4. A method of destroying a water-oil emulsion, comprising introducing into the emulsion a demulsifying composition according to claim 1 in an amount of from 30 ppm to 2000 ppm.