EP3894518A1 - Désémulsifiant de polyester - Google Patents

Désémulsifiant de polyester

Info

Publication number
EP3894518A1
EP3894518A1 EP19813917.2A EP19813917A EP3894518A1 EP 3894518 A1 EP3894518 A1 EP 3894518A1 EP 19813917 A EP19813917 A EP 19813917A EP 3894518 A1 EP3894518 A1 EP 3894518A1
Authority
EP
European Patent Office
Prior art keywords
acid
monoglyceride
demulsifier
emulsion
combinations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19813917.2A
Other languages
German (de)
English (en)
Inventor
Hanamanthsa Bevinakatti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nouryon Chemicals International BV
Original Assignee
Nouryon Chemicals International BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nouryon Chemicals International BV filed Critical Nouryon Chemicals International BV
Publication of EP3894518A1 publication Critical patent/EP3894518A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/66—Polyesters containing oxygen in the form of ether groups
    • C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/047—Breaking emulsions with separation aids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
    • C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
    • C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
    • C08G65/3322—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof acyclic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G33/00—Dewatering or demulsification of hydrocarbon oils
    • C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means

Definitions

  • Oil extraction is the removal of oil from an oil reservoir. Oil is often recovered from a reservoir as a water-in-oil emulsion. Crude oil typically contains appreciable quantities of water as part of a crude oil emulsion. Demulsifiers are chemical compounds used to separate water-in-oil and/or oil-in-water emulsions into separate water and oil phases, and are commonly used to remove water from crude oil. It is desirable to remove water from crude oil shortly after extraction, as oil extractors prefer to store and/or ship“dry” oil (i.e. oil with low concentrations of water). Storing water with the oil takes up space on oilfield installations, and shipping crude oil containing a significant amount of water to an oil refinery is both expensive and inefficient. Thus, oil extractors aim to demulsify crude oil emulsions at the earliest after extraction and in particular at offshore platforms where space is typically limited.
  • a demulsifier comprises the reaction product of a) a combination of a monoglyceride and polyethylene glycol (PEG), b) an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof, and c) optionally, a fatty acid, a fatty alcohol, and combinations thereof.
  • PEG polyethylene glycol
  • a method of demulsifying an emulsion, wherein the emulsion is a water-in-oil emulsion or an oil-in-water emulsion is also provided.
  • the method comprises the steps of adding the demulsifier to the emulsion, the water component of the emulsion, and/or the oil component of the emulsion, and separating the emulsion into an oil phase and a water phase.
  • a method of making a demulsifier composition comprises the step of reacting a) a combination of a monoglyceride and PEG with b) an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof and, optionally, a fatty acid, a fatty alcohol, and combinations thereof.
  • a demulsifier according to this disclosure includes the reaction product of a) (i) an alkoxylated monoglyceride, (ii) a combination of an alkoxylated polyol and a fatty acid, and (iii) a combination of a monoglyceride and PEG, with b) an acid having at least two carboxyl groups, full or partial esters thereof, an anhydride thereof and combinations thereof.
  • the demulsifier includes the reaction product of a) (i) an alkoxylated monoglyceride, (ii) a combination of an alkoxylated polyol and a fatty acid and (iii) a combination of a monoglyceride and PEG; b) an acid having at least two carboxyl groups, full or partial esters thereof, an anhydride thereof and combinations thereof, and c) a fatty acid, a fatty alcohol and combinations thereof.
  • the demulsifier includes the reaction product of a) a combination of a monoglyceride and PEG, b) an acid having at least two carboxyl groups, full or partial esters thereof, an anhydride thereof and combinations thereof, and c) optionally, a fatty acid, a fatty alcohol and combinations thereof.
  • the disclosed demulsifier separates oil-in-water and/or water-in-oil emulsions. The water-in-oil emulsions are typically observed in crude oil.
  • polyol alkoxylate derivatives An alkoxylated monoglyceride, a combination of an alkoxylated polyol and a fatty acid, and a combination of a monoglyceride and PEG, once reacted according to the present disclosure, may all be considered polyol alkoxylate derivatives. Depending on the selection, the location of the alkoxylate moiety in the final demulsifier may be different. Each of these“derivatives” will be described in further detail below.
  • Monoglycerides are compounds having a glycerol moiety linked to a fatty acid via an ester bond.
  • the fatty acid may be linked to either a primary alcohol or the secondary alcohol of the glycerol moiety.
  • the following structure (1) illustrates one embodiment of a monoglyceride:
  • R is the alk(en)yl component of the fatty acid.
  • the R group is an alkenyl group having from 7 carbon atoms to 21 carbon atoms.
  • Commercially available monoglycerides are typically not“pure” but instead contain a mixture of monoglycerides, diglycerides and triglycerides.
  • the term“monoglyceride” refers to products in which the monoglyceride moiety is the most prevalent.
  • PEG Polyethylene glycol or PEG is a polyether having the general formula
  • the number n may vary and determines whether a particular PEG has a low molecular weight or a high molecular weight.
  • the PEG used in the demulsifier described herein has a number n between about 4 and about 200.
  • PEGs include PEG 200, PEG 400, PEG 600, PEG 1000, PEG 1450, PEG 2000 and PEG 8000 where the number following“PEG” is the approximate ( ⁇ 5%) average molar mass (g/mol) of the PEG.
  • PEG 400 has an average molar mass between about 380 g/mol and about 420 g/mol. PEGs having other molecular weights may also be used.
  • Alkoxylated monoglyceride Alkoxylation is a reaction that involves the addition of an epoxide (a cyclic ether) to a compound. Suitable epoxides for alkoxylation of monoglycerides include ethylene oxide (C2H4O), propylene oxide (CH3CHCH2O) and epoxy butanes. Once alkoxylated, it is expected that the hydroxyl and ester groups of the monoglyceride will be linked to alkoxy groups (e.g., ethyleneoxy, propoxy, etc.). In an embodiment, the alkoxylated monoglyceride is ethoxylated monoglyceride. One example of an ethoxylated monoglyceride is shown in the diagram (2) below:
  • each mole of alkoxylated monoglyceride contains, on average, between 5 alkoxy units and 40 alkoxy units (i.e., from 5 to 40 moles of alkoxy units per mole of monoglyceride). In some embodiments, the 5 alkoxy units to 40 alkoxy units are ethyleneoxy units. In other embodiments, each mole of alkoxylated monoglyceride contains, on average, less than 8 propyleneoxy units.
  • Alkoxylated polyol Alkoxylated polyols or polyol alkoxylates, such as alkoxylated glycerol, are commercially available. Like alkoxylated monoglycerides, polyol alkoxylates contain linkages to alkoxy groups at hydroxyl sites. For example, the following structure (3) illustrates an ethoxylated glycerol:
  • the polyol in its unalkoxylated form contains from 3 to 6 carbon atoms. In some embodiments, the polyol contains 3 or 4 hydroxyl groups. In some embodiments, the ratio of primary alcohols to secondary alcohols on the polyol (unalkoxylated) is from 2:1 to 4:0, or 2:1, or 3:0, or 4:0.
  • Suitable alkoxylated polyols include glycerol alkoxylates, pentaerythritol alkoxylates, and trimethylolpropane alkoxylates.
  • Fatty acid Fatty acids have the general formula R-COOH where R is an alk(en)yl or an aryl group.
  • R is an alk(en)yl or an aryl group.
  • An alk(en)yl R group may be saturated or unsaturated, linear or branched and cycloalkyl or aryl.
  • the R group contains between 7 carbon atoms and 21 carbon atoms.
  • the fatty acid has between 8 and 22 carbon atoms in total.
  • a mixture of fatty acids may be present.
  • Suitable fatty acids include tallow fatty acids, tall oil fatty acids, coconut fatty acids, palmitic acid, stearic acid, myristic acid, oleic acid, palmitoleic acid, linoleic acid, linolenic acid, lauric acid, decanoic acid, caprylic acid and combinations thereof.
  • a majority of the fatty acid contains chains having between 12 and 18 carbon atoms.
  • Carboxylic acid The acid having at least two carboxyl groups may have two, three or four carboxyl (-COOH) groups.
  • the acid having at least two carboxyl groups may be linear or branched and saturated or unsaturated.
  • the acid is a dicarboxylic acid and has the general formula HOOC(CH 2 ) n COOH.
  • n has a value between about 2 and about 34.
  • the acid has between 4 and 36 carbon atoms in total.
  • the value of n may be the same for branched acids. Suitable acids include succinic acid, adipic acid, glutaric acid, sebacic acid, and combinations thereof.
  • the acid When three carboxyl groups are present, the acid is a triacid. Suitable triacids include citric acid (CeHxCb). When four carboxyl groups are present, the acid is a tetracid. Suitable examples of branched acids include itaconic acid and citraconic acid. In an embodiment, the acid having at least two carboxyl groups comprises an acid selected from succinic acid, adipic acid, glutaric acid, citric acid, and combinations thereof.
  • a full or partial ester of the acids described above may be used in place of the above acid.
  • a full ester (diester) has the general formula R 1 OOC(CH 2 ) n COOR 2 where R 1 and R 2 are alkyl or aryl groups.
  • n has a value between about 2 and about 34.
  • R 1 and R 2 may be different alkyl or aryl groups or the same.
  • less than all the carboxylic acid groups are replaced with an ester group.
  • both an acid having at least two carboxyl groups and a full or partial ester are used to produce the demulsifier.
  • Anhydride An organic acid anhydride may be used in place of the above carboxylic acid.
  • An anhydride of a linear dicarboxylic acid has the general formula R'(CO)- 0-(CO)R 2 where R 1 and R 2 are alkyl or aryl groups. R 1 and R 2 may be different alkyl or aryl groups or the same.
  • Suitable organic acid anhydrides include succinic anhydride, maleic anhydride, alkenyl succinic anhydride, itaconic anhydride, citraconic anhydride and combinations thereof. In some embodiments, both an acid having at least two carboxyl groups and an organic acid anhydride are used to produce the demulsifier.
  • the demulsifier is the reaction product of (i) an alkoxylated monoglyceride and (ii) a combination of a monoglyceride and polyethylene glycol (PEG); an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof (as described above); and a fatty acid, a fatty alcohol and combinations thereof.
  • PEG polyethylene glycol
  • the fatty acid has the same properties as the fatty acid previously described the fatty acid has the general formula R-COOH where R is an alkyl or an aryl group.
  • R is an alkyl or an aryl group.
  • An alkyl R group may be saturated or unsaturated, linear or branched, and cycloalkyl or aryl.
  • the R group contains between 7 carbon atoms and 21 carbon atoms.
  • the fatty acid has between 8 and 22 carbon atoms in total.
  • a mixture of fatty acids may be present.
  • Suitable fatty acids include tallow fatty acids, tall oil fatty acids, coconut fatty acids, palmitic acid, stearic acid, myristic acid, oleic acid, dibasic acid, palmitoleic acid, linoleic acid, linolenic acid, lauric acid, decanoic acid, caprylic acid and combinations thereof.
  • the fatty acid comprises an acid selected from tallow fatty acids, tall oil fatty acids, palmitic acid, stearic acid, myristic acid, oleic acid, dibasic acid, palmitoleic acid, linoleic acid, linolenic acid, and combinations thereof.
  • a majority of the fatty acid contains chains having between 12 and 18 carbon atoms.
  • the fatty alcohol has the general formula R-OH where R is an alkyl group.
  • the R group may be saturated or unsaturated and linear or branched. In some embodiments, the R group contains between 6 carbon atoms and 22 carbon atoms.
  • a mixture of fatty alcohols may be present. Suitable fatty alcohols include decyl alcohol, lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol and combinations thereof. In some embodiments, a majority of the fatty alcohols contain chains having between 12 and 18 carbon atoms. In some embodiments, both a fatty acid and a fatty alcohol are used to produce the demulsifier.
  • the molar ratio of the polyol alkoxylate derivatives to the acid having at least two carboxyl groups, full or partial ester thereof, the anhydride thereof and combinations thereof is between about 1:3 and about 5:1, or between about 1:2 and about 2: 1.
  • the molar ratio of polyol alkoxylate derivatives to the fatty acid, the fatty alcohol and combinations thereof, when used, is between about 1:3 and about 5:1, or between about 1:2 and about 2:1.
  • the reaction product is prepared by reacting the selected polyol alkoxylate “derivative”; the acid having at least two carboxyl groups, full or partial ester thereof, the anhydride thereof and combinations thereof; and, optionally, the fatty acid, the fatty alcohol and combinations thereof described herein.
  • the reaction may occur without using any catalyst or in the presence of a basic or acidic catalyst.
  • Suitable base catalysts include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate.
  • Suitable acid catalysts include phosphorous acid, hypophosphorous acid, hypophosphoric acid, and para- toluenesulfonic acid monohydrate.
  • the reaction may proceed at temperatures up to about 200 °C in a nitrogen environment and/or under vacuum conditions (e.g. , from about 7 to about 20 kPa).
  • the reaction product yielded by the above reaction conditions is a polyester suitable for use as a demulsifier.
  • the polyol alkoxylate derivative is a combination of monoglyceride and PEG, it is believed that a compound having the following structure (4) is predominantly produced:
  • n is a number between 4 and 200.
  • the monoglyceride is glycerol monooleate.
  • polyol alkoxylate derivative is an alkoxylated monoglyceride
  • general reaction pathway shown below is followed, with a compound having the following structure (5) being predominantly produced:
  • This reaction pathway uses ethoxylated soy monoglyceride as the alkoxylated monoglyceride. Propoxylated monoglycerides and monoglycerides having different fatty acid chains are expected to behave similarly.
  • the presence of the optional fatty acid or fatty alcohol affects the end caps of the demulsifier with R2 being -(CO)Ri (fatty acid) or a fatty alcohol residue.
  • m is a number between 1 and 50, or between 2 and 10.
  • the total of n per alkoxylated monoglyceride residue is a number between 5 and
  • polyol alkoxylate derivative is a combination of an alkoxylated polyol and a fatty acid
  • general reaction pathway shown below is followed, with a compound having the following structure (6) being predominantly produced:
  • This reaction pathway uses ethoxylated glycerol as the alkoxylated polyol.
  • Propoxylated glycerols and other alkoxylated polyols are expected to behave similarly.
  • Alkoxylated polyols may also contain a mixture of alkoxylates (e.g. , some ethyleneoxy units and some propyleneoxy units).
  • m is a number between 1 and 50, or between 2 and 10.
  • the total of n per alkoxylated polyol residue is a number between 5 and 40.
  • the reaction product may also include water.
  • water is removed from the reaction product so that the total water concentration is below about 5 percent by weight, or less than about 3 percent by weight, or less than about 2 percent by weight, or less than about 1 percent by weight.
  • the water may remain in mixture with the reaction product until after demulsification of the target emulsion.
  • the reaction product may be thought of as containing monoglyceride residues, PEG-type residues, diacid-type residues and, optionally, fatty acid residues.
  • the PEG-type residues refer to the alkoxylate or PEG groups described herein.
  • the diacid-type residues include the diacid, triacid and tetracid described herein (or the full or partial ester thereof and/or the anhydride thereof). When present, approximately two fatty acid residues, excluding the fatty group present on the monoglyceride residue, are present for each monoglyceride residue, PEG-type residue, and diacid-type residue.
  • a method according to this disclosure includes a method of making a polyester demulsifier by reacting a) (i) an alkoxylated monoglyceride, (ii) a combination of an alkoxylated polyol and a fatty acid, and (iii) a combination of a monoglyceride and polyethylene glycol (PEG) with b) an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof.
  • PEG polyethylene glycol
  • a method of making a polyester demulsifier includes reacting a) (i) an alkoxylated monoglyceride, (ii) a combination of an alkoxylated polyol and a fatty acid, and (iii) a combination of a monoglyceride and polyethylene glycol (PEG), with b) an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof, and c) a fatty acid, a fatty alcohol and combinations thereof.
  • PEG polyethylene glycol
  • a method of making a demulsifier includes the step of reacting a) a combination of a monoglyceride and polyethylene glycol (PEG) with b) an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof and, optionally, a fatty acid, a fatty alcohol and combinations thereof.
  • the reaction takes place at temperatures up to about 200 °C in a nitrogen environment and/or under vacuum conditions (e.g., from about 7 to about 20 kPa) for a period of time sufficient to form the polyester demulsifier.
  • Another method includes a method of demulsifying an oil-in- water emulsion or a water-in-oil emulsion.
  • the method includes adding an effective amount of the demulsifier prepared by reacting a) a combination of a monoglyceride and polyethylene glycol (PEG) with b) an acid having at least two carboxyl groups, a full or partial ester thereof, an anhydride thereof and combinations thereof and, optionally, a fatty acid, a fatty alcohol and combinations thereof, described herein, to the emulsion, the water component of the emulsion, and/or the oil component of the emulsion.
  • PEG polyethylene glycol
  • the emulsion is a water-in-oil emulsion, such as a crude oil emulsion containing salt water, sea water and/or ocean water.
  • the demulsifier may be added to an oil (e.g., crude oil) before an emulsion is formed with the oil.
  • the demulsifier may be added to a crude oil upstream of a separator at an oilfield installation.
  • the demulsifier may also be used to prevent emulsification as a nonemulsifier.
  • the method further includes the step of separating the emulsion into an oil phase and a water phase.
  • the demulsifier described herein may be used alone as a demulsifier or combined with other demulsifiers to separate the phases of oil-in-water and/or water-in-oil emulsions.
  • the exact composition of a demulsifier formulation (the demulsifier described herein alone or used in combination with other demulsifiers, droppers and/or dryers) may vary depending on the properties of the targeted emulsion. Crude oils obtained from the same well may change over time and changing environmental conditions (e.g. , temperature, pressure) may require changes to the demulsification formulation in order to maintain effectiveness.
  • the demulsifier formulation may be used at a concentration between about 1 part per million (ppm) and about 1000 ppm. In some embodiments, the demulsifier formulation is used at a concentration between about 5 ppm and about 500 ppm. In some other embodiments, the demulsifier formulation is used at a concentration between about 10 ppm and about 400 ppm. In still other embodiments, the demulsifier formulation is used at a concentration between about 20 ppm and about 200 ppm.
  • 850 grams of ethoxylated glycerol, 161 grams of adipic acid (Alfa Aesar), 384 grams of tall oil fatty acid (Nouryon) and 4.6 grams of pa ra - to 1 u en es u 11 o n i c acid were added to a 2-L flask.
  • the ethoxylated glycerol contained 12 moles of ethyleneoxy units for each mole of ethoxylated glycerol.
  • the flask was flushed with nitrogen gas.
  • the pressure in the reactor was reduced to 20 kPa and the reactor was heated to a temperature of 180 °C.
  • GMO glycerol monooleate
  • PEG- 200 polyethylene glycol
  • Alfa Aesar polyethylene glycol
  • NaOH catalyst used as a 50 wt% solution in water
  • GMO glycerol monooleate
  • PEG- 600 polyethylene glycol
  • Alfa Aesar polyethylene glycol
  • NaOH catalyst used as a 50 wt% solution in water
  • GMO glycerol monooleate
  • PEG- 600 available from Acros
  • Alfa Aesar polyethylene glycol
  • oleic acid Voleic OA00 available from Vantage
  • NaOH catalyst used as a 50 wt% solution in water
  • GMO glycerol monooleate
  • PEG- 200 polyethylene glycol
  • Alfa Aesar adipic acid
  • NaOH catalyst used as a 50 wt% solution in water
  • GMO glycerol monooleate
  • PEG- 200 polyethylene glycol
  • dibasic acid dibasic acid flakes available from Invista
  • p-toluene sulfonic acid catalyst used as a 50 wt% solution in water
  • GMO glycerol monooleate
  • PEG- 200 available from Acros
  • dibasic acid dibasic acid flakes available from Invista
  • oleic acid Voleic OA00 available from Vantage
  • p- toluene sulfonic acid catalyst used as a 50 wt% solution in water
  • Example 1 The ethoxylated soy monoglyceride polyester prepared in Example 1 was screened for toxicity and for biodegradability in seawater. Toxicity was assessed using Daphnia magna and algae. Biodegradability in seawater was performed according to the OECD Guideline for Testing of Chemicals, Section 3; Degradation and Accumulation, No. 306: Biodegradability in Seawater, Closed Bottle Test. Table 1 illustrates toxicity and biodegradability test results for the Example 1 ethoxylated soy monoglyceride polyester.
  • Example 1 ethoxylated soy monoglyceride polyester shows favourable results. It is expected that the Example 2 ethoxylated glycerol/TOFA polyester will provide comparable results to that of Example 1.
  • Example 1 and Example 2 demulsifiers were evaluated by carrying out tests on emulsions of crude oil from the North Sea and synthetic North Sea water. The speed of separation and the clarity (transmission) of the water phase were assessed using a TurbiscanTM Lab Expert instrument (Formulaction SA, France).
  • the TurbiscanTM instrument is an automated, vertical scan analyzer that may be used for studying the stability of concentrated emulsions. It is equipped with a near- infrared light source and detection systems for transmission as well as light scattering (backscattering).
  • the demulsifiers were diluted with/dissolved in butyl diglycol (BDG) to facilitate dosage of small concentrations in the tests.
  • BDG butyl diglycol
  • Table 2 illustrates TurbiscanTM data for Example 1 and Example 2 polyesters in addition to a demulsifier that does not meet the OSPAR regulatory requirements for a“green” demulsifier (Witbreak DGE 169, available from Nouryon).
  • the ppm column indicates the concentration of the demulsifier used in the test.
  • “Avg Transmission” (of the water layer) is the average transmission reading between the 0 distance and the position of the crude oil- water boundary at 40 minutes.“StartTime” is the first non-zero signal of transmission, which is later developed into the water layer at the bottom of the testing vial.
  • “HalfTime” is the time when the crude oil-water boundary reaches the midway height of a completely demulsified mixture (e.g., 8 mm when a completely demulsified mixture has a height of 16 mm in the test vial).
  • “End distance” is the position of the crude oil- water boundary at the end of the experiment (40 minutes).
  • “WaterOut” is the (End distance - height of completely demulsified mixture)/height of completely demulsified mixture x 100.
  • the TurbiscanTM results demonstrate that the Example 1 and Example 2 ethoxylated glyceride polyesters provide an adequate level of demulsification.
  • the TurbiscanTM results also demonstate that the Examples 3-8 monoglyceride/PEG polyesters also provide an adequate level of demulsification.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Polyethers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Un désémulsifiant comprend le produit de réaction de a) une combinaison d'un monoglycéride et d'un polyéthylène glycol (PEG), b) un acide ayant au moins deux groupes carboxyle, un ester complet ou partiel de celui-ci, un anhydride de celui-ci et des combinaisons de ceux-ci, et c) éventuellement, un acide gras, un alcool gras et des combinaisons de ceux-ci. Un procédé de désémulsification d'une émulsion eau dans huile ou huile dans l'eau comprend l'ajout du désémulsifiant à l'émulsion et la séparation de l'émulsion en une phase huileuse et une phase aqueuse.
EP19813917.2A 2018-12-11 2019-12-11 Désémulsifiant de polyester Pending EP3894518A1 (fr)

Applications Claiming Priority (3)

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US201862777903P 2018-12-11 2018-12-11
EP19152550 2019-01-18
PCT/EP2019/084757 WO2020120630A1 (fr) 2018-12-11 2019-12-11 Désémulsifiant de polyester

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AU (1) AU2019395820B2 (fr)
BR (1) BR112021011358A2 (fr)
CA (1) CA3122651C (fr)
WO (1) WO2020120630A1 (fr)

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US11981871B1 (en) * 2023-03-13 2024-05-14 Baker Hughes Oilfield Operations Llc Methods of designing green demulsifiers

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CA3122651C (fr) 2023-07-18
AU2019395820A1 (en) 2021-07-01
CA3122651A1 (fr) 2020-06-18
WO2020120630A1 (fr) 2020-06-18
BR112021011358A2 (pt) 2021-08-31

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