CN105273200B - The breaking dehydrating method of polyquarternium-type reverse-phase emulsifier and O/W type crude oil emulsions - Google Patents
The breaking dehydrating method of polyquarternium-type reverse-phase emulsifier and O/W type crude oil emulsions Download PDFInfo
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Abstract
A kind of breaking dehydrating method of O/W type crude oil emulsions the invention discloses daiamid type demulsifier and using the demulsifier.The described demulsifier is made by following steps：(1) the daiamid type molecule that end moieties are amido is grafted on the daiamid type molecule that end moieties are ester group, wherein, the mol ratio for the daiamid type molecule that end moieties are the daiamid type molecule of amido and end moieties are ester group is 3 50:1, the algebraically for the daiamid type molecule that the end moieties are the daiamid type molecule of amido and end moieties are ester group is less than 3.0；(2) compound shown in the product of step (1) and Formulas I is reacted；(3) compound shown in the compound and Formula II shown in the product of step (2) and Formulas I is reacted.The demulsifier that the present invention synthesizes has excellent demulsification.
Description
Technical field
The present invention relates to a kind of demulsifier, in particular it relates to a kind of polyquarternium-type suitable for O/W type crude oil emulsions
The breaking dehydrating method of the O/W type crude oil emulsions of reverse-phase emulsifier and the use demulsifier.
Background technology
With the further exploitation in China oil field and the promotion and implementation of tertiary oil recovery technology, oil field mining liquid moisture content is not
Disconnected to improve, the ratio of oil-in-water (O/W) emulsion gradually increases, and the use of various oil recovery auxiliary agents further increases O/W emulsus
The stability of liquid, the intractability of high water cut produced fluid is increased, while difficulty is brought to the processing pretreatment of follow-up crude oil, caused
The problems such as electric desalting apparatus treatment effect is deteriorated, and oily waste water treatment difficulty in refinery's increases.At present, for O/W emulsion breakdowns
Reverse-phase emulsifier limitednumber, new and effective product needs further to be developed.
Polyamidoamine dendrimers (PAMAM) have highly branched, symmetrical, orderly three-dimensional build molecular structure,
And there are numerous functional groups in surface distributed, therefore there is such macromolecular good intermiscibility, surface-active, low solution to glue
The features such as spending, turn into study hotspot in recent years in the application of the process field containing oil emulsion, research is found, polyamidoamine
Macromolecular is a kind of efficient O/W type demulsifier for emulsion.Such as：CN101357992A discloses linear polyquaternium (LPQA),
With polyamide-amide (PAMAM) for crosslinking agent, stellate poly quaternary ammonium salt reverse-phase emulsifier (SPQA) is made.CN102559246A is disclosed
By linear polyamide-amide and epichlorohydrin reaction, linear polyamide-amide quaternary ammonium salt is made, is then mixed with other compositions
Reverse-phase emulsifier is made.
Polyamidoamine dendrimer is mainly prepared with divergent method：Using ethylenediamine as core is triggered, the first step is reacted, with third
E pioic acid methyl ester generates a quaternary ester by Michael addition reactions, is referred to as -0.5 generation.Second step reacts, quaternary ester and excess
Ethylenediamine occur ammonolysis reaction generate a quaternary amide compound, referred to as 0 generation.Repeat first and second step reactions steps, you can
Obtain the polyamidoamine macromolecular compound of different algebraically.
The problem of prior art is present is, undesirable less than the polyamidoamine macromolecular demulsification in 3.0 generations, and 3.0
It is very high that highly -branched degree polyamidoamine macromolecular more than generation synthesizes extremely difficult and production cost.Polyquarternium-type is anti-phase broken
Emulsion equally has the problem of polyamidoamine macromolecular is present using PAMAM as core.
The content of the invention
Polyquarternium-type that is simple it is an object of the invention to provide a kind of synthetic route and being easy to industrialized production is anti-phase broken
Emulsion.
In the present invention, the algebraically of polyamidoamine molecule provides by the following method：Using ethylenediamine as initiation core, the first step
Reaction, one quaternary ester is generated by Michael addition reactions with methyl acrylate, was referred to as -0.5 generation；Second step reacts, quaternary
Ester occurs ammonolysis reaction with excessive ethylenediamine and generates a quaternary amide compound, referred to as 0 generation；Repeat the reaction of first and second step
Step, often increases by a step, and the algebraically of polyamidoamine molecule increases by 0.5 generation.
To achieve these goals, the present invention provides a kind of polyamidoamine reverse-phase emulsifier, and the demulsifier passes through following
Step is made：
(1) the polyamidoamine molecule that end moieties are amido is grafted to the polyamidoamine that end moieties are ester group
On molecule, wherein, the polyamidoamine molecule that end moieties are the polyamidoamine molecule of amido and end moieties are ester group
Mol ratio be 3-50:1, the polyamide that the end moieties are the polyamidoamine molecule of amido and end moieties are ester group-
The algebraically of amine type molecule is less than 3.0；
(2) compound shown in the product of step (1) and Formulas I is reacted；
(3) compound shown in the compound and Formula II shown in the product of step (2) and Formulas I is reacted,
In Formulas I, R1And R1' it is each independently halogen, preferably chlorine or bromine；R2For H or OH,
In Formula II, R3For alkyl, preferably carbon number is 2-6 alkyl.
Preferably, the polyamidoamine that end moieties are the polyamidoamine molecule of amido and end moieties are ester group point
The mol ratio of son is 5-30:1.
Preferably, the end moieties are that the algebraically of the polyamidoamine molecule of amido is 0,1.0,2.0, the end group
Group is that the algebraically of the polyamidoamine molecule of ester group is 0.5,1.5,2.5.
Preferably, the end moieties are that the algebraically of the polyamidoamine molecule of amido less than end moieties is ester group
The algebraically of polyamidoamine molecule.
Preferably, the end moieties are that the algebraically of the polyamidoamine molecule of amido less than end moieties is ester group
The difference of the algebraically of polyamidoamine molecule is 0.5-1.5.
Preferably, the condition of grafting includes, and in alcoholic solvent, under inert gas shielding, is heated to reflux 1-24 hours.
Preferably, the alcoholic solvent is methanol and/or ethanol.
Preferably, it is amido the alcoholic solution for the polyamidoamine molecule that end moieties are ester group to be added drop-wise into end moieties
Polyamidoamine molecule alcoholic solution in.
Preferably, the condition that step (2) is reacted includes：Temperature is 30-60 DEG C, and the time is 0.5-12 hours；
The condition that step (3) is reacted includes：Temperature is 50-90 DEG C, and the time is 0.5-12 hours
The total amount of compound in step (2) and step (3) shown in Formulas I and the polyamidoamine that end moieties are ester group
The mol ratio of molecule is 50-400：1；
On the basis of the total amount of compound in step (2) and step (3) shown in Formulas I, the chemical combination in step (2) shown in Formulas I
Thing accounts for 10-20%, and the compound in step (2) shown in Formulas I accounts for 80-90%；
Compound and a mole mol ratio for the polyamidoamine molecule that end moieties are ester group shown in Formula II are 20-
300:1。
Present invention also offers a kind of breaking dehydrating method of O/W types crude oil emulsion, this method is provided using the present invention
Polyamidoamine reverse-phase emulsifier.
On the basis of the quality of O/W type crude oil emulsions, the dosage of the polyamidoamine reverse-phase emulsifier is generally
10-500ppm, preferably 30-300ppm.
The condition of breaking emulsion and dewatering is generally：Demulsifier is added in O/W type crude oil emulsions and is well mixed, be demulsified temperature
30~80 DEG C, it is demulsified 10~150min of the time.
The present invention can be core using low algebraically (being less than for 3.0 generations) polyamidoamine macromolecular of the end group as ester group, directly
Connect and be the polyamidoamine macromolecular graft reaction of amido with low algebraically (being less than for 3.0 generations) end moieties, so as to efficiently prepare tool
There is polyamidoamine demulsifier, then further polyquarternium-type reverse-phase emulsifier is made in reaction.Synthetic method letter of the present invention
It is single, it is easy to industrialize large-scale production and application, avoids that existing PAMAM dendritic macromoles building-up process is tediously long, isolates and purifies
Difficult, the problems such as production cost is higher.From the point of view of the test result of embodiment, the polyquarternium-type rp demulsification of the invention synthesized
Agent has excellent demulsification, thus it is speculated that reason may is that：The molecule for the polyamidoamine demulsifier that the present invention synthesizes is not in
Regular branch shape structure, there is high density terminal amino group number, to larger molecular organicses, such as pitch, colloid, paraffin have infiltration to increase for it
Molten effect, the terminal amino group density for having the tendency of strong adsorption in oil-water interfaces, especially molecule is higher, easier to be inhaled in liquid film
The surface reactive material on liquid film is fallen in attached and replacement, forms new unstable interface, promotes emulsion discharge opeing, preferable so as to reach
Demulsification.Demulsifier of the present invention is non-polyether class product, has good demulsification performance to crude oil emulsion, can be applied to original
Oil exploitation, collect the field such as defeated, refining.For polyquaternium reverse demulsifier, high density amino means highly denser simultaneously
The polyquaternium grafting of degree, it is highdensity to be grafted the principal functional structure for being only reverse-phase emulsifier.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Polyquarternium-type reverse-phase emulsifier provided by the invention is made by following steps：
(1) the polyamidoamine molecule that end moieties are amido is grafted to the polyamidoamine that end moieties are ester group
On molecule, wherein, the polyamidoamine molecule that end moieties are the polyamidoamine molecule of amido and end moieties are ester group
Mol ratio be 3-50:1, the polyamide that the end moieties are the polyamidoamine molecule of amido and end moieties are ester group-
The algebraically of amine type molecule is less than 3.0；
(2) compound shown in the product of step (1) and Formulas I is reacted；
(3) compound shown in the compound and Formula II shown in the product of step (2) and Formulas I is reacted,
In Formulas I, R1And R1' it is each independently halogen, preferably chlorine or bromine；R2For H or OH,
In Formula II, R3For alkyl, preferably carbon number is 2-6 alkyl.
Preferably, the polyamide-amide that the end moieties are the polyamidoamine molecule of amido and end moieties are ester group
The algebraically of type molecule is less than 3.0, more preferably 0.5-2.5, more preferably 0.5-2.0.According to the preferred embodiment, profit
The demulsifier of the present invention can be synthesized with the relatively low polyamidoamine molecule of algebraically, synthetic method is simple, and cost is relatively low.
The polyamidoamine molecule that the end moieties are the polyamidoamine molecule of amido and end moieties are ester group
It is commercially available, can also be prepared by the preparation method of routine.For example, end moieties are the polyamide-amide of amido
Type molecule is referred to demulsification performance [J] petroleum journals that the such as Wang Jun dendritic interphases intend O/W patterns emulsion of crude oil
(PETROLEUM PROCESSING), the 3rd phase of volume 2002,18：It is prepared by the method disclosed in 60-64.It can also refer to disclosed in CN10418230A
Method prepare the polyamidoamine molecules of various algebraically.
Using amido as in the molecule of end group, it is end group to carry out reaction to form ester group by amido and methyl acrylate
Molecule, then add ethylenediamine molecule, the molecule that amido is end group can be formed by ester group and reacting ethylenediamine.Pass through
Control reactions steps can be by polyamidoamine molecular Control in either 0.5,1.5,2.5 generations etc. in 0,1.0,2.0 generations.
Preferably, the end moieties are that the algebraically of the polyamidoamine molecule of amido less than end moieties is ester group
The algebraically of polyamidoamine molecule.It is highly preferred that the end moieties are less than for the algebraically of the polyamidoamine molecule of amido
End moieties are that the difference of the algebraically of the polyamidoamine molecule of ester group is 0.5-1.5.According to the preferred embodiment, favorably
In will be that the polyamidoamine molecule of amido is grafted on the polyamidoamine molecule that end moieties are ester group by end moieties.
End moieties are the polyamidoamine molecule of amido and rubbing for polyamidoamine molecule that end moieties are ester group
You are ratio preferably 3-50:1, more preferably 5-30:1, more preferably 7-20:1.
As long as the polyamidoamine molecule that the reaction condition of the grafting makes end moieties be amido is grafted to end moieties
For on the polyamidoamine molecule of ester group, the condition being preferably grafted includes, in alcoholic solvent, in inert gas shielding
Under, 1-24 hours are heated to reflux, alcoholic solution of the end moieties for the polyamidoamine molecule of ester group is more preferably added drop-wise to end group
In alcoholic solution of the group for the polyamidoamine molecule of amido.
The alcoholic solvent can be methanol and/or ethanol.The dosage of alcoholic solvent is not particularly limited, as long as can be by polyamides
Amine-amine type molecular melting is wherein, it is preferable that relative to the polyamidoamine that 100 grams of gross weight end moieties are amido
Molecule is grafted to the polyamidoamine molecule that end moieties are ester group, and the dosage of alcoholic solvent is 200-1000 milliliters.
The temperature being heated at reflux can be 65 DEG C, and the time can be 1-24 hours, preferably 2-18 hours.
The inert gas can be the protective gas for being not involved in reaction, such as nitrogen or rare gas.
The condition that step (2) is reacted can include：Temperature is 30-60 DEG C, and the time is 0.5-12 hours.
The condition that step (3) is reacted can include：Temperature is 50-90 DEG C, and the time is 0.5-12 hours
The total amount of compound in step (2) and step (3) shown in Formulas I and the polyamidoamine that end moieties are ester group
The mol ratio of molecule is preferably 50-400：1.
On the basis of the total amount of compound in step (2) and step (3) shown in Formulas I, the chemical combination in step (2) shown in Formulas I
Thing accounts for 10-20%, and the compound in step (2) shown in Formulas I accounts for 80-90%.
Compound and mole mol ratio for the polyamidoamine molecule that end moieties are ester group shown in Formula II can be
20-300:1。
The example of compound shown in Formulas I includes but is not limited to dichloroisopropanol, dichloropropane, dibromo isopropanol, dibromo third
Alkane.
The example of compound shown in Formula II includes but is not limited to N, N, N ', N '-tetramethylethylenediamine he N, N, N ', N '-four
Methyl propane diamine.
Tetramethylethylenediamine4-methyl-diaminopropane
The present invention will be described in detail by way of examples below.
In embodiment and comparative example, the algebraically of polyamidoamine macromolecular is provided by the definition of the present invention.
Embodiment 1
The embodiment is used for the demulsifier for preparing the present invention.
1) by 7.0 grams (2.5 mMs) 1.5 PAMAM type macromolecular, (end group is ester group, purchased from Weihai Chen Yuan points
Sub- new material Co., Ltd, 1.5 generation PAMAM-COOCH3) be dissolved in 10 ml methanols, it is added drop-wise to 20.7 grams of (40 mMs) 0 generations
(end group is amido to polyamidoamine macromolecular, purchased from Weihai Chen Yuan molecule new materials Co., Ltd, 0 generation PAMAM-NH3)
In 200 ml methanol solution, it is heated to reflux 4 hours under nitrogen protection.
2) product of step (1) is cooled to 25 DEG C, 5.1 grams of dichloroisopropanols (40 mMs) is added, at 40 DEG C -50 DEG C
After the lower lower reaction of nitrogen protection 4 hours, while 29.0 grams of tetramethylammonium ethylenediamines (250 mMs) are slowly added dropwise into reaction system
With 32.3 grams of dichloroisopropanols (250 mMs), it is warming up to after 60 DEG C -70 DEG C, reacts 2 hours, depressurize again under nitrogen protection
It is the demulsifier that can obtain the present invention to remove solvent.
Embodiment 2
The embodiment is used for the demulsifier for preparing the present invention.
1) by 14.4 grams (5 mMs) 1.5 PAMAM type macromolecular, (end group is ester group, purchased from Weihai Chen Yuan molecules
New material Co., Ltd) it is dissolved in 25 milliliters of methanol, it is added drop-wise to 57.2 grams (40 mMs) 1.0 PAMAM type macromolecular
In the methanol solution of (end group is amido, purchased from Weihai Chen Yuan molecule new materials Co., Ltd) (200 milliliters), nitrogen protection is lower to be added
Heat backflow 6 hours.
2) product of step (1) is cooled to 25 DEG C, 8.1 grams of dibromopropanes (40 mMs) is added, at 40 DEG C -50 DEG C
After the lower reaction of nitrogen protection 4 hours, at the same be slowly added dropwise into reaction system 52.0 grams of tetramethylammonium propane diamine (400 mMs) and
101.0 grams of dibromopropanes (500 mMs), reacted again 2 hours after being warming up to 60 DEG C -70 DEG C, removal of solvent under reduced pressure can obtain
To the demulsifier of the present invention.
Embodiment 3
The embodiment is used for the demulsifier for preparing the present invention.
1) by 12.0 grams (2 mMs) 2.5 PAMAM type macromolecular, (end group is ester group, purchased from Weihai Chen Yuan molecules
New material Co., Ltd) it is dissolved in 20 ml methanols, it is added drop-wise to 45.8 grams (32 mMs) 1.0 PAMAM type macromolecular
In the 200 ml methanol solution of (end group is amido, purchased from Weihai Chen Yuan molecule new materials Co., Ltd), nitrogen protection is lower to heat
Backflow 12 hours.
2) product of step (1) is cooled to 25 DEG C, 8.6 grams of dibromo isopropanols (40 mMs) is added, at 40 DEG C -50 DEG C
After the lower lower reaction of nitrogen protection 4 hours, while 46.4 grams of tetramethylammonium ethylenediamines (400 mMs) are slowly added dropwise into reaction system
With 108.0 grams of dibromo isopropanols (500 mMs), reacted again 4 hours after being warming up to 60 DEG C -70 DEG C, removal of solvent under reduced pressure is
It can obtain the demulsifier of the present invention.
Embodiment 4
The embodiment is used for the demulsifier for preparing the present invention.
1) by 12.0 grams (2 mMs) 2.5 PAMAM type macromolecular, (end group is ester group, purchased from Weihai Chen Yuan molecules
New material Co., Ltd) it is dissolved in 20 ml methanols, it is added drop-wise to 53.0 grams (16 mMs) 2.0 PAMAM type macromolecular
In the 200 ml methanol solution of (end group is amido, purchased from Weihai Chen Yuan molecule new materials Co., Ltd), nitrogen protection is lower to heat
Backflow 12 hours.
2) product of step (1) is cooled to 25 DEG C, 33.9 grams of dichloropropanes (300 mMs) is added, at 40 DEG C -50 DEG C
After the lower lower reaction of nitrogen protection 4 hours, while 143.0 grams of tetramethylammonium propane diamine (1.1 moles) are slowly added dropwise into reaction system
With 101.7 grams of dichloroisopropanols (900 mMs), reacted again 8 hours after being warming up to 60 DEG C -70 DEG C, removal of solvent under reduced pressure is
It can obtain the demulsifier of the present invention.
Embodiment 5
The performance of obtained demulsifier in above-described embodiment is detected using oil and gas industry standard SY/T5793-93.
The experiment crude oil used is Tahe middle matter crude oil, density 901.5kg/m3, viscosity (50 DEG C) 28.6mm2/ s, acid number 0.18mgKOH/
G, colloid 10.4%, asphalitine 4.5%.Tahe Crude Oil is configured to the O/W type emulsion of moisture content 90% with quantitative distilled water,
Vibrated 30 times after adding reverse-phase emulsifier, be put into 50 DEG C of water-bath standing sedimentations and a layer water sample analysis oil content is removed after 30 minutes.Examination
Test result and see the table below 1：
Table 1
Comparative example 1
According to method same as Example 5, tested using following two reverse-phase emulsifiers, as a result such as table 2 below institute
Show.
HW-08 reverse-phase emulsifiers are the cationic polymers made of organic quaternary amine adds crosslinking agent, are helped by Shandong is bimodal
Agent factory produces
SM-535 reverse-phase emulsifiers are the cationic polymers made of polyethylene polyamine and epichlorohydrin reaction, by god
The magnificent Science and Technology Ltd.'s production in state.
Comparative example 2
By 71.6 gram of 3.0 generation PAMAM-NH2(being purchased from Weihai Chen Yuan molecule new materials Co., Ltd) is dissolved in 225 milliliters of methanol
In, 8.1 grams of dibromopropanes (40 mMs) are added, after being reacted 4 hours under nitrogen protection at 40 DEG C -50 DEG C, while to reaction
52.0 grams of tetramethylammonium propane diamine (400 mMs) and 101.0 grams of dibromopropanes (500 mMs) are slowly added dropwise in system, heat up
Reacted again 2 hours after to 60 DEG C -70 DEG C, removal of solvent under reduced pressure can obtain demulsifier.
According to method same as Example 5, the reverse-phase emulsifier that use value obtains is tested, as a result as shown in table 2 below.
Comparative example 3
By 71.6 gram of 2.0 generation PAMAM-NH2(being purchased from Weihai Chen Yuan molecule new materials Co., Ltd) is dissolved in 225 milliliters of methanol
In, 8.1 grams of dibromopropanes (40 mMs) are added, after being reacted 4 hours under nitrogen protection at 40 DEG C -50 DEG C, while to reaction
52.0 grams of tetramethylammonium propane diamine (400 mMs) and 101.0 grams of dibromopropanes (500 mMs) are slowly added dropwise in system, heat up
Reacted again 2 hours after to 60 DEG C -70 DEG C, removal of solvent under reduced pressure can obtain demulsifier.
According to method same as Example 5, the reverse-phase emulsifier that use value obtains is tested, as a result as shown in table 2 below.
Table 2
Demulsifier produced by the present invention is can be seen that from the experimental result of Tables 1 and 2 significantly to drop using rear aqueous phase oil content
It is low, show excellent demulsification.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (14)
1. a kind of polyquarternium-type reverse-phase emulsifier, it is characterised in that the demulsifier is made by following steps：
(1) the polyamidoamine molecule that end moieties are amido is grafted to the polyamidoamine molecule that end moieties are ester group
On, wherein, end moieties are the polyamidoamine molecule of amido and rubbing for polyamidoamine molecule that end moieties are ester group
Your ratio is 3-50:1, the polyamidoamine that the end moieties are the polyamidoamine molecule of amido and end moieties are ester group
The algebraically of molecule is less than 3.0, and the end moieties are that the algebraically of the polyamidoamine molecule of amido less than end moieties is ester group
Polyamidoamine molecule algebraically；
(2) compound shown in the product of step (1) and Formulas I is reacted；
(3) compound shown in the compound and Formula II shown in the product of step (2) and Formulas I is reacted,
In Formulas I, R1And R1' it is each independently halogen, R2For H or OH,
In Formula II, R3For alkylidene.
2. demulsifier according to claim 1, wherein, in Formulas I, the R1And R1' it is each independently chlorine or bromine, Formula II
In, R3The alkylidene for being 2-6 for carbon number.
3. demulsifier according to claim 1 or 2, wherein, end moieties are the polyamidoamine molecule and end group of amido
Group is that the mol ratio of the polyamidoamine molecule of ester group is 5-30:1.
4. demulsifier according to claim 1 or 2, wherein, the end moieties are the polyamidoamine molecule of amido
Algebraically is 0,1.0 or 2.0, and the end moieties are that the algebraically of the polyamidoamine molecule of ester group is 0.5,1.5 or 2.5.
5. demulsifier according to claim 1 or 2, wherein, the end moieties are the polyamidoamine molecule of amido
Algebraically is 0.5-1.5 less than the difference of the algebraically for the polyamidoamine molecule that end moieties are ester group.
6. demulsifier according to claim 4, wherein, the end moieties are the generation of the polyamidoamine molecule of amido
Number is 0.5-1.5 less than the difference of the algebraically for the polyamidoamine molecule that end moieties are ester group.
7. demulsifier according to claim 1 or 2, wherein, the condition of grafting includes, in alcoholic solvent, in inert gas
Under protection, 1-24 hours are heated to reflux.
8. demulsifier according to claim 7, wherein, the alcoholic solvent is methanol and/or ethanol.
9. demulsifier according to claim 7, wherein, end moieties are molten for the alcohol of the polyamidoamine molecule of ester group
Drop is added in the alcoholic solution for the polyamidoamine molecule that end moieties are amido.
10. demulsifier according to claim 8, wherein, end moieties are molten for the alcohol of the polyamidoamine molecule of ester group
Drop is added in the alcoholic solution for the polyamidoamine molecule that end moieties are amido.
11. demulsifier according to claim 1 or 2, wherein,
The condition that step (2) is reacted includes：Temperature is 30-60 DEG C, and the time is 0.5-12 hours；
The condition that step (3) is reacted includes：Temperature is 50-90 DEG C, and the time is 0.5-12 hours
The total amount of compound in step (2) and step (3) shown in Formulas I and the polyamidoamine molecule that end moieties are ester group
Mol ratio be 50-400：1；
On the basis of the total amount of compound in step (2) and step (3) shown in Formulas I, the compound in step (2) shown in Formulas I accounts for
10-20%, the compound in step (3) shown in Formulas I account for 80-90%；
Compound and the mol ratio for the polyamidoamine molecule that end moieties are ester group shown in Formula II are 20-300:1.
12. a kind of breaking dehydrating method of O/W types crude oil emulsion, it is characterised in that usage right requires any one in 1-11
Demulsifier described in.
13. in accordance with the method for claim 12, wherein, on the basis of the quality of O/W type crude oil emulsions, the demulsifier
Dosage be 10-500ppm.
14. in accordance with the method for claim 12, it is characterised in that the condition of breaking emulsion and dewatering is：Demulsifier is added into O/W types
In crude oil emulsion and it is well mixed, be demulsified 30~80 DEG C of temperature, is demulsified 10~150min of the time.
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| 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 |
| CN113444237B (en) * | 2021-05-06 | 2023-07-28 | 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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| CN101716475A (en) * | 2009-11-11 | 2010-06-02 | 中国科学院化学研究所 | Reversed phase emulsion splitter and preparation method thereof |
| CN102233249A (en) * | 2010-04-30 | 2011-11-09 | 中国石油天然气集团公司 | Dendritic reverse demulsifier and preparation method thereof |
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| CN101716475A (en) * | 2009-11-11 | 2010-06-02 | 中国科学院化学研究所 | Reversed phase emulsion splitter and preparation method thereof |
| CN102233249A (en) * | 2010-04-30 | 2011-11-09 | 中国石油天然气集团公司 | Dendritic reverse demulsifier and preparation method thereof |
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