CN105273200A - Polyquaternary ammonium salt reverse demulsifier and O/W crude oil emulsion demulsification and dehydration method - Google Patents
Polyquaternary ammonium salt reverse demulsifier and O/W crude oil emulsion demulsification and dehydration method Download PDFInfo
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Abstract
The invention discloses a polyamido-amine demulsifier, and an O/W crude oil emulsion demulsification and dehydration method using the demulsifier. The demulsifier is prepared through the following steps: 1, grafting an ester group-terminated polyamido-amine molecule with an amino-terminated polyamido-amine molecule, wherein a molar ratio of the amino-terminated polyamido-amine molecule to the ester group-terminated polyamido-amine molecule is 3-50:1, and the respective generation of the amino-terminated polyamido-amine molecule and the ester group-terminated polyamido-amine molecule is smaller than 3.0; 2, reacting a product obtained in step 1 with a compound represented by formula I; and 3, reacting a product obtained in step 2 with the compound of the formula I and a compound represented by formula II. The demulsifier synthesized in the invention has an excellent demulsification effect.
Description
Technical field
The present invention relates to a kind of emulsion splitter, particularly, the breaking dehydrating method of the polyquarternium-type reverse-phase emulsifier relating to a kind of O/W of being applicable to type crude oil emulsion and the O/W type crude oil emulsion using this emulsion splitter.
Background technology
Along with the further exploitation in China oil field and the promotion and implementation of tertiary oil recovery technology, oil field mining liquid water ratio improves constantly, the ratio of oil-in-water (O/W) milk sap increases gradually, the use of various oil recovery auxiliary agent further increases the stability of O/W milk sap, increase the intractability of high water cut produced fluid, bring difficulty to follow-up crude oil processing pre-treatment simultaneously, cause electric desalting apparatus process result degrades, the problems such as refinery's oily water treatment difficulty increasing.At present, for the reverse-phase emulsifier limitednumber of O/W emulsion breakdown, new and effective product needs to be developed further.
Polyamidoamine dendrimers (PAMAM) has highly branched, symmetrical, orderly three-dimensional build molecular structure, and there is numerous functional group in surface arrangement, therefore this type of macromole has the features such as good intermiscibility, surfactivity, low soltion viscosity, study hotspot is in recent years being become containing the application of oil emulsion process field, research finds, polyamidoamine macromole is a kind of O/W type demulsifier for emulsion efficiently.Such as: CN101357992A discloses linear polyquaternium (LPQA), with polyamide-amide (PAMAM) for linking agent, make stellate poly quaternary ammonium salt reverse-phase emulsifier (SPQA).CN102559246A discloses linear polyamide-amide and epichlorohydrin reaction, obtained linear polyamide-amide quaternary ammonium salt, then mixes obtained reverse-phase emulsifier with other composition.
Polyamidoamine dendrimer is mainly prepared with divergent method: take quadrol as initiated core, and the first step is reacted, and generates a quaternary ester, be called for-0.5 generation with methyl acrylate by Michael addition reaction.Second step reacts, and quaternary ester and excessive quadrol generation ammonolysis reaction generate a quaternary amide compound, are called for 0 generation.Repeat first and second step reactions steps, the polyamidoamine macromolecular cpd of different algebraically can be obtained.
Prior art Problems existing is, the polyamidoamine macromole demulsification being less than for 3.0 generations is undesirable, and more than 3.0 generations highly-branched degree polyamidoamine macromole synthesis is very difficult and production cost is very high.Polyquarternium-type reverse-phase emulsifier take PAMAM as core, has polyamidoamine macromole Problems existing equally.
Summary of the invention
The object of this invention is to provide a kind of synthetic route simple and be easy to the polyquarternium-type reverse-phase emulsifier of suitability for industrialized production.
In the present invention, the algebraically of polyamidoamine molecule specifies by the following method: take quadrol as initiated core, and the first step is reacted, and generates a quaternary ester, be called for-0.5 generation with methyl acrylate by Michael addition reaction; Second step reacts, and quaternary ester and excessive quadrol generation ammonolysis reaction generate a quaternary amide compound, are called for 0 generation; Repeat first and second step reactions steps, often increase by a step, the algebraically of polyamidoamine molecule increases by 0.5 generation.
To achieve these goals, the invention provides a kind of polyamidoamine reverse-phase emulsifier, this emulsion splitter is obtained by following steps:
(1) be that the polyamidoamine molecule of amido is grafted on the polyamidoamine molecule that end moieties is ester group by end moieties, wherein, the mol ratio of end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is 3-50:1, and the algebraically of described end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is less than 3.0;
(2) compound shown in the product of step (1) and formula I is reacted;
(3) compound shown in the product of step (2) and formula I and the compound shown in formula II are reacted,
In formula I, R
1and R
1' be halogen independently of one another, be preferably chlorine or bromine; R
2for H or OH,
In formula II, R
3for alkyl, being preferably carbonatoms is the alkyl of 2-6.
Preferably, the mol ratio of end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is 5-30:1.
Preferably, described end moieties is the algebraically of the polyamidoamine molecule of amido is 0,1.0,2.0, and described end moieties is the algebraically of the polyamidoamine molecule of ester group is 0.5,1.5,2.5.
Preferably, the algebraically of described end moieties to be the algebraically of the polyamidoamine molecule of amido lower than end moieties the be polyamidoamine molecule of ester group.
Preferably, the difference of described end moieties to be the algebraically of the polyamidoamine molecule of amido lower than end moieties the be algebraically of the polyamidoamine molecule of ester group is 0.5-1.5.
Preferably, the condition of grafting comprises, in alcoholic solvent, under protection of inert gas, and reflux 1-24 hour.
Preferably, described alcoholic solvent is methyl alcohol and/or ethanol.
Preferably, be that to be added drop-wise to end moieties be in the alcoholic solution of polyamidoamine molecule of amido for the alcoholic solution of polyamidoamine molecule of ester group by end moieties.
Preferably, the condition that step (2) carries out reacting comprises: temperature is 30-60 DEG C, and the time is 0.5-12 hour;
The condition that step (3) carries out reacting comprises: temperature is 50-90 DEG C, and the time is 0.5-12 hour
The total amount of the compound shown in step (2) and step (3) Chinese style I and end moieties are the mol ratio of the polyamidoamine molecule of ester group is 50-400:1;
The total amount of the compound shown in step (2) and step (3) Chinese style I is benchmark, and the compound shown in step (2) Chinese style I accounts for 10-20%, and the compound shown in step (2) Chinese style I accounts for 80-90%;
Compound shown in formula II and end moieties are mole mol ratio of the polyamidoamine molecule of ester group is 20-300:1.
Present invention also offers a kind of breaking dehydrating method of O/W type crude oil emulsion, the method uses polyamidoamine reverse-phase emulsifier provided by the invention.
With the quality of O/W type crude oil emulsion for benchmark, the consumption of described polyamidoamine reverse-phase emulsifier is generally 10-500ppm, is preferably 30-300ppm.
The condition of breaking emulsion and dewatering is generally: to be added by emulsion splitter in O/W type crude oil emulsion and to mix, breakdown of emulsion temperature 30 ~ 80 DEG C, breakdown of emulsion time 10 ~ 150min.
The present invention can be that the polyamidoamine macromole of ester group is for core with low algebraically (being less than for 3.0 generations) end group, it is directly the polyamidoamine macromole graft reaction of amido with low algebraically (being less than for 3.0 generations) end moieties, thus efficient preparation has polyamidoamine emulsion splitter, then reaction obtains polyquarternium-type reverse-phase emulsifier further.Synthetic method of the present invention is simple, is easy to industrialization large-scale production and application, avoids the problems such as existing PAMAM dendritic macromole building-up process is tediously long, separation and purification is difficult, production cost is higher.From the test result of embodiment, the polyquarternium-type reverse-phase emulsifier of the present invention's synthesis has excellent demulsification, infer that reason may be: the molecule of the polyamidoamine emulsion splitter of the present invention's synthesis is irregular shape structure, there is high-density terminal amino group number, it is to larger molecular organics, as pitch, colloid, paraffin etc. have infiltration solublization, there is strong adsorption in the tendency of water-oil interface, especially the terminal amino group density of molecule is higher, easilier adsorb at liquid film and replace the surfactant on liquid film, form new unstable interface, promote emulsion discharge opeing, thus reach good demulsification.Emulsion splitter of the present invention is non-polyether series products, has good demulsification performance to crude oil emulsion, can be applicable to Oil extraction, collects defeated, the field such as refining.For polyquaternium reverse demulsifier, high-density amino means the polyquaternium grafting of higher density simultaneously, and highdensity grafting is only the principal functional structure of reverse-phase emulsifier.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Polyquarternium-type reverse-phase emulsifier provided by the invention is obtained by following steps:
(1) be that the polyamidoamine molecule of amido is grafted on the polyamidoamine molecule that end moieties is ester group by end moieties, wherein, the mol ratio of end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is 3-50:1, and the algebraically of described end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is less than 3.0;
(2) compound shown in the product of step (1) and formula I is reacted;
(3) compound shown in the product of step (2) and formula I and the compound shown in formula II are reacted,
In formula I, R
1and R
1' be halogen independently of one another, be preferably chlorine or bromine; R
2for H or OH,
In formula II, R
3for alkyl, being preferably carbonatoms is the alkyl of 2-6.
Preferably, the algebraically of described end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is less than 3.0, is more preferably 0.5-2.5, more preferably 0.5-2.0.According to this preferred implementation, the polyamidoamine molecule utilizing algebraically lower can synthesize emulsion splitter of the present invention, and synthetic method is simple, and cost is lower.
The polyamidoamine molecule of described end moieties to be the polyamidoamine molecule of amido and end moieties be ester group can be commercially available, and also can be prepared by conventional preparation method.Such as, end moieties is that the polyamidoamine molecule of amido can with reference to Wang Jun etc. dendritic interphase is to the demulsification performance [J] of O/W type simulated emulsion of crude oil. and petroleum journal (refining of petroleum), 2002,18th volume the 3rd phase: prepared by method disclosed in 60-64.Also the polyamidoamine molecule of various algebraically can be prepared with reference to method disclosed in CN10418230A.
In the molecule taking amido as end group, undertaken reacting to form the molecule that ester group is end group by amido and methyl acrylate, and then add quadrol molecule, can form by ester group and reacting ethylenediamine the molecule that amido is end group.Can by polyamidoamine molecular Control in 0,1.0,2.0 generations or 0.5,1.5,2.5 generations etc. by controlling reactions steps.
Preferably, the algebraically of described end moieties to be the algebraically of the polyamidoamine molecule of amido lower than end moieties the be polyamidoamine molecule of ester group.More preferably, the difference of described end moieties to be the algebraically of the polyamidoamine molecule of amido lower than end moieties the be algebraically of the polyamidoamine molecule of ester group is 0.5-1.5.According to this preferred implementation, being conducive to just end moieties is that the polyamidoamine molecule of amido is grafted on the polyamidoamine molecule that end moieties is ester group.
The mol ratio of end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is preferably 3-50:1, is more preferably 5-30:1, more preferably 7-20:1.
As long as the reaction conditions of described grafting makes end moieties be that the polyamidoamine molecule of amido is grafted on the polyamidoamine molecule that end moieties is ester group; preferably the condition of grafting comprises; in alcoholic solvent; under protection of inert gas; end moieties is more preferably that to be added drop-wise to end moieties be in the alcoholic solution of polyamidoamine molecule of amido for the alcoholic solution of the polyamidoamine molecule of ester group by reflux 1-24 hour.
Described alcoholic solvent can be methyl alcohol and/or ethanol.The consumption of alcoholic solvent is not particularly limited, as long as can by polyamidoamine molecular melting wherein, preferably, the polyamidoamine molecule being amido relative to 100 grams of gross weight end moieties is grafted to the polyamidoamine molecule that end moieties is ester group, and the consumption of alcoholic solvent is 200-1000 milliliter.
The temperature of reflux can be 65 DEG C, and the time can be 1-24 hour, is preferably 2-18 hour.
Described rare gas element can such as, for not participating in the protective gas reacted, nitrogen or rare gas.
The condition that step (2) carries out reacting can comprise: temperature is 30-60 DEG C, and the time is 0.5-12 hour.
The condition that step (3) carries out reacting can comprise: temperature is 50-90 DEG C, and the time is 0.5-12 hour
The total amount of the compound shown in step (2) and step (3) Chinese style I and end moieties are that the mol ratio of the polyamidoamine molecule of ester group is preferably 50-400:1.
The total amount of the compound shown in step (2) and step (3) Chinese style I is benchmark, and the compound shown in step (2) Chinese style I accounts for 10-20%, and the compound shown in step (2) Chinese style I accounts for 80-90%.
Compound shown in formula II and end moieties are mole mol ratio of the polyamidoamine molecule of ester group can be 20-300:1.
The example of compound shown in formula I includes but not limited to dichloroisopropanol, propylene dichloride, dibromo Virahol, dibromopropane.
The example of compound shown in formula II includes but not limited to N, N, N ', N '-Tetramethyl Ethylene Diamine heN, N, N ', N '-4-methyl-diaminopropane.
tetramethyl Ethylene Diamine
4-methyl-diaminopropane
Below will be described the present invention by embodiment.
In embodiment and comparative example, the macromolecular algebraically of polyamidoamine is all by definition regulation of the present invention.
Embodiment 1
This embodiment is for the preparation of emulsion splitter of the present invention.
1) by 7.0 grams (2.5 mmoles) 1.5 PAMAM type macromole (end group is ester group, purchased from Weihai Chen Yuan molecule novel material company limited, 1.5 generation PAMAM-COOCH
3) be dissolved in 10 ml methanol, be added drop-wise to 20.7 grams (40 mmoles) 0 PAMAM type macromole (end group is amido, purchased from Weihai Chen Yuan molecule novel material company limited, 0 generation PAMAM-NH
3) 200 ml methanol solution in, reflux 4 hours under nitrogen protection.
2) product of step (1) is cooled to 25 DEG C; add 5.1 grams of dichloroisopropanols (40 mmole); react under nitrogen protection after 4 hours at 40 DEG C-50 DEG C; in reaction system, slowly drip 29.0 grams of tetramethylammonium quadrols (250 mmole) and 32.3 grams of dichloroisopropanols (250 mmole) simultaneously; be warming up to after 60 DEG C-70 DEG C; react 2 hours again under nitrogen protection, removal of solvent under reduced pressure can obtain emulsion splitter of the present invention.
Embodiment 2
This embodiment is for the preparation of emulsion splitter of the present invention.
1) by 14.4 grams (5 mmoles) 1.5 PAMAM type macromole (end group is ester group; purchased from Weihai Chen Yuan molecule novel material company limited) be dissolved in methyl alcohol 25 milliliters; be added drop-wise to 57.2 grams (40 mmoles) 1.0 PAMAM type macromole (end group is amido; purchased from Weihai Chen Yuan molecule novel material company limited) methanol solution in (200 milliliters), reflux 6 hours under nitrogen protection.
2) product of step (1) is cooled to 25 DEG C; add 8.1 grams of dibromopropanes (40 mmole); react under nitrogen protection after 4 hours at 40 DEG C-50 DEG C; in reaction system, slowly drip 52.0 grams of tetramethylammonium propylene diamine (400 mmole) and 101.0 grams of dibromopropanes (500 mmole) simultaneously; react 2 hours again after being warming up to 60 DEG C-70 DEG C, removal of solvent under reduced pressure can obtain emulsion splitter of the present invention.
Embodiment 3
This embodiment is for the preparation of emulsion splitter of the present invention.
1) by 12.0 grams (2 mmoles) 2.5 PAMAM type macromole (end group is ester group; purchased from Weihai Chen Yuan molecule novel material company limited) be dissolved in 20 ml methanol; be added drop-wise to 45.8 grams (32 mmoles) 1.0 PAMAM type macromole (end group is amido; purchased from Weihai Chen Yuan molecule novel material company limited) 200 ml methanol solution in, reflux 12 hours under nitrogen protection.
2) product of step (1) is cooled to 25 DEG C; add 8.6 grams of dibromo Virahols (40 mmole); react under nitrogen protection after 4 hours at 40 DEG C-50 DEG C; in reaction system, slowly drip 46.4 grams of tetramethylammonium quadrols (400 mmole) and 108.0 grams of dibromo Virahols (500 mmole) simultaneously; react 4 hours again after being warming up to 60 DEG C-70 DEG C, removal of solvent under reduced pressure can obtain emulsion splitter of the present invention.
Embodiment 4
This embodiment is for the preparation of emulsion splitter of the present invention.
1) by 12.0 grams (2 mmoles) 2.5 PAMAM type macromole (end group is ester group; purchased from Weihai Chen Yuan molecule novel material company limited) be dissolved in 20 ml methanol; be added drop-wise to 53.0 grams (16 mmoles) 2.0 PAMAM type macromole (end group is amido; purchased from Weihai Chen Yuan molecule novel material company limited) 200 ml methanol solution in, reflux 12 hours under nitrogen protection.
2) product of step (1) is cooled to 25 DEG C; add 33.9 grams of propylene dichlorides (300 mmole); react under nitrogen protection after 4 hours at 40 DEG C-50 DEG C; in reaction system, slowly drip 143.0 grams of tetramethylammonium propylene diamine (1.1 moles) and 101.7 grams of dichloroisopropanols (900 mmole) simultaneously; react 8 hours again after being warming up to 60 DEG C-70 DEG C, removal of solvent under reduced pressure can obtain emulsion splitter of the present invention.
Embodiment 5
Oil and gas industry standard SY/T5793-93 is adopted to detect the performance of emulsion splitter obtained in above-described embodiment.The test crude oil used is matter crude oil in Tahe, density 901.5kg/m
3, viscosity (50 DEG C) 28.6mm
2/ s, acid number 0.18mgKOH/g, colloid 10.4%, bituminous matter 4.5%.Tahe Crude Oil and quantitative distilled water are mixed with the O/W type milk sap of water ratio 90%, vibrate 30 times after adding reverse-phase emulsifier, put into 50 DEG C of water-bath standing sedimentations and after 30 minutes, take off a layer water sample analysis oleaginousness.Test-results sees the following form 1:
Table 1
Comparative example 1
According to the method identical with embodiment 5, use following two kinds of reverse-phase emulsifiers to test, result is as shown in table 2 below.
HW-08 reverse-phase emulsifier adds by organic quaternary amine the cationic polymers that linking agent makes, and by Shandong, bimodal auxiliary reagent factory produces
SM-535 reverse-phase emulsifier is the cationic polymers be made up of polyethylene polyamine and epichlorohydrin reaction, and by Divine Land, magnificent Science and Technology Ltd. produces.
Comparative example 2
By 71.6 gram of 3.0 generation PAMAM-NH
2(purchased from Weihai Chen Yuan molecule novel material company limited) is dissolved in methyl alcohol 225 milliliters; add 8.1 grams of dibromopropanes (40 mmole); react under nitrogen protection after 4 hours at 40 DEG C-50 DEG C; in reaction system, slowly drip 52.0 grams of tetramethylammonium propylene diamine (400 mmole) and 101.0 grams of dibromopropanes (500 mmole) simultaneously; react 2 hours again after being warming up to 60 DEG C-70 DEG C, removal of solvent under reduced pressure can obtain emulsion splitter.
According to the method identical with embodiment 5, the reverse-phase emulsifier that use value obtains is tested, and result is as shown in table 2 below.
Comparative example 3
By 71.6 gram of 2.0 generation PAMAM-NH
2(purchased from Weihai Chen Yuan molecule novel material company limited) is dissolved in methyl alcohol 225 milliliters; add 8.1 grams of dibromopropanes (40 mmole); react under nitrogen protection after 4 hours at 40 DEG C-50 DEG C; in reaction system, slowly drip 52.0 grams of tetramethylammonium propylene diamine (400 mmole) and 101.0 grams of dibromopropanes (500 mmole) simultaneously; react 2 hours again after being warming up to 60 DEG C-70 DEG C, removal of solvent under reduced pressure can obtain emulsion splitter.
According to the method identical with embodiment 5, the reverse-phase emulsifier that use value obtains is tested, and result is as shown in table 2 below.
Table 2
As can be seen from the experimental result of table 1 and table 2, after the emulsion splitter that the present invention obtains uses, aqueous phase oil length significantly reduces, and shows excellent demulsification.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (12)
1. a polyquarternium-type reverse-phase emulsifier, is characterized in that, this emulsion splitter is obtained by following steps:
(1) be that the polyamidoamine molecule of amido is grafted on the polyamidoamine molecule that end moieties is ester group by end moieties, wherein, the mol ratio of end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is 3-50:1, and the algebraically of described end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is less than 3.0;
(2) compound shown in the product of step (1) and formula I is reacted;
(3) compound shown in the product of step (2) and formula I and the compound shown in formula II are reacted,
In formula I, R
1and R
1' be halogen independently of one another, be preferably chlorine or bromine; R
2for H or OH,
In formula II, R
3for alkyl, being preferably carbonatoms is the alkyl of 2-6.
2. emulsion splitter according to claim 1, wherein, the mol ratio of end moieties to be the polyamidoamine molecule of amido and end moieties the be polyamidoamine molecule of ester group is 5-30:1.
3. emulsion splitter according to claim 1, wherein, described end moieties is the algebraically of the polyamidoamine molecule of amido is 0,1.0 or 2.0, and described end moieties is the algebraically of the polyamidoamine molecule of ester group is 0.5,1.5 or 2.5.
4. the emulsion splitter according to claim 1 or 3, wherein, the algebraically of described end moieties to be the algebraically of the polyamidoamine molecule of amido lower than end moieties the be polyamidoamine molecule of ester group.
5. emulsion splitter according to claim 4, wherein, the difference of described end moieties to be the algebraically of the polyamidoamine molecule of amido lower than end moieties the be algebraically of the polyamidoamine molecule of ester group is 0.5-1.5.
6. emulsion splitter according to claim 1, wherein, the condition of grafting comprises, in alcoholic solvent, under protection of inert gas, reflux 1-24 hour.
7. emulsion splitter according to claim 6, wherein, described alcoholic solvent is methyl alcohol and/or ethanol.
8. end moieties wherein, is that to be added drop-wise to end moieties be in the alcoholic solution of polyamidoamine molecule of amido for the alcoholic solution of the polyamidoamine molecule of ester group by the emulsion splitter according to claim 6 or 7.
9. emulsion splitter according to claim 1, wherein,
The condition that step (2) carries out reacting comprises: temperature is 30-60 DEG C, and the time is 0.5-12 hour;
The condition that step (3) carries out reacting comprises: temperature is 50-90 DEG C, and the time is 0.5-12 hour
The total amount of the compound shown in step (2) and step (3) Chinese style I and end moieties are the mol ratio of the polyamidoamine molecule of ester group is 50-400:1;
The total amount of the compound shown in step (2) and step (3) Chinese style I is benchmark, and the compound shown in step (2) Chinese style I accounts for 10-20%, and the compound shown in step (2) Chinese style I accounts for 80-90%;
Compound shown in formula II and end moieties are mole mol ratio of the polyamidoamine molecule of ester group is 20-300:1.
10. a breaking dehydrating method for O/W type crude oil emulsion, is characterized in that, uses the emulsion splitter described in any one in claim 1-9.
11. in accordance with the method for claim 10, and wherein, with the quality of O/W type crude oil emulsion for benchmark, the consumption of described emulsion splitter is 10-500ppm.
12. in accordance with the method for claim 10, it is characterized in that, the condition of breaking emulsion and dewatering is: to be added by emulsion splitter in O/W type crude oil emulsion and to mix, breakdown of emulsion temperature 30 ~ 80 DEG C, breakdown of emulsion time 10 ~ 150min.
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| CN112584910A (en) * | 2018-08-29 | 2021-03-30 | 埃科莱布美国股份有限公司 | Multi-charged ionic compounds derived from polyamines, compositions thereof and their use as reverse demulsifiers for oil and gas operations |
| CN112584910B (en) * | 2018-08-29 | 2023-03-14 | 埃科莱布美国股份有限公司 | Multi-charged ionic compounds derived from polyamines, compositions thereof and their use as reverse demulsifiers for oil and gas operations |
| CN113444237A (en) * | 2021-05-06 | 2021-09-28 | 中海油(天津)油田化工有限公司 | Quaternized polyether reverse demulsifier and preparation method thereof |
| CN114768309A (en) * | 2022-05-12 | 2022-07-22 | 广东粤首新科技有限公司 | Reverse demulsifier and preparation method thereof |
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