CN109294618B - The method being demulsified using Ambident hyperbranched polyethyleneimine to oil-in-water emulsion - Google Patents
The method being demulsified using Ambident hyperbranched polyethyleneimine to oil-in-water emulsion Download PDFInfo
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- CN109294618B CN109294618B CN201811221735.1A CN201811221735A CN109294618B CN 109294618 B CN109294618 B CN 109294618B CN 201811221735 A CN201811221735 A CN 201811221735A CN 109294618 B CN109294618 B CN 109294618B
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- 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
Abstract
The present invention relates to a kind of method being demulsified using Ambident hyperbranched polyethyleneimine to oil-in-water emulsion, include the following steps: C 1)10~C18Saturated fatty acid and hyperbranched polyethyleneimine carry out amidation process, obtain Ambident hyperbranched polyethyleneimine；The hydrophilic close kernel of the Ambident hyperbranched polyethyleneimine is hyperbranched polyethyleneimine, and shell is made of lipophilic group chain alkyl and hydrophilic group amino；The mass ratio of the saturated fatty acid and hyperbranched polyethyleneimine is 0.5~2；2) the Ambident hyperbranched polyethyleneimine is distributed in oil-in-water emulsion and is demulsified.This method realizes that oil-in-water emulsion reaches water phase oil content lower than 10% within a short period of time, while its oily phase moisture content can be down to 0.1% hereinafter, forming clearly oil-water interfaces.
Description
Technical field
The present invention relates to petroleum additive fields, and in particular to a kind of to utilize Ambident hyperbranched polyethyleneimine to water packet
The method that oil type emulsion is demulsified.
Background technique
Crude oil is a multicomponent mixture, and contained moisture is steady to be formed existing for emulsified state, between water and oil
Fixed emulsion, wherein water is difficult automatic sedimentation and gets off.In order to destroy their this stable emulsified states, in dewatering process
Using the method that crude oil demulsifier is added.As oilfield exploitation technically deepens continuously, each elephant has been subsequently entered three times
Oil recovery stage, petroleum resources are increasingly reduced, and oil well produced crude oil is changed by the Water-In-Oil of initial stage of development (W/O) type emulsion
Oil-in-water (O/W) type lotion, and due to the extensive use of chemical displacement of reservoir oil method, the stability of emulsion of crude oil is gradually increased, is adopted
Liquid is processed into for the technical problem in the production of many oil fields out, and demulsification difficulty is increasing, and the requirement of demulsifier performance is also got over
Highest.
Dissaving polymer has irregular dendriform divergent structure, and within the scope of certain molecular weight, molecule is not yet
At it is fine and close spherical when to sprawl divergent shape, the structure of divergent shape in the solution can rapid dispersion, not easy entanglement, and its characteristic
Viscosity is much smaller than conventional demulsifier, is conducive to spread to interface and adsorb, and forms the same of Stability Bound facial mask weakening naturally occurring emulsifying agent
When, the unstable adsorbed film of highly -branched is quickly generated, and then obtain good demulsification.
Wherein, hyperbranched polyethyleneimine (HPEI) is that one kind is studied more mature, cheap, industrial at present
The dissaving polymer (Hyperbranched polymers) that metaplasia produces.HPEI is a kind of highly branched polymer, is had
The liquid of viscosity, in a solvent viscosity very little.Compared with other high molecular polymers, it has good thermal stability, thermogravimetric
Analysis shows that not decomposing lower than 300 DEG C in air, there is preferable dissolubility, branch terminals have a large amount of amino convenient for changing
Property, it can be used for designing and researching and developing the demulsifier of novel special dissaving structure.
The demulsifier overwhelming majority used in scene belongs to high molecular polymer at present.But existing branching demulsification
Agent is only capable of that water phase is made to reach good de-oiling rate and oily mutually remain unchanged is in emulsion state.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of utilization Ambident hyperbranched polyethyleneimine
To the method that oil-in-water emulsion is demulsified, it is low to realize that oil-in-water emulsion reaches water phase oil content within a short period of time
In 10%, while its oily phase moisture content can be down to 0.1% hereinafter, forming clearly oil-water interfaces.
Technical solution provided by the present invention are as follows:
A method of it is demulsified using Ambident hyperbranched polyethyleneimine to oil-in-water emulsion, including as follows
Step:
1) by C10~C18Saturated fatty acid and hyperbranched polyethyleneimine carry out amidation process, obtain amphiphilic super
Branched polyethylene imine；
The hydrophilic close kernel of the Ambident hyperbranched polyethyleneimine is hyperbranched polyethyleneimine, and shell is by oleophylic
Base chain alkyl and hydrophilic group amino composition；The mass ratio of the saturated fatty acid and hyperbranched polyethyleneimine is 0.5~2；
2) the Ambident hyperbranched polyethyleneimine is distributed in oil-in-water emulsion and is demulsified.
C is used in the present invention10~C18Saturated fatty acid to hyperbranched polyethyleneimine carry out graft modification, make its end
Chain alkyl is grafted on base.HPEI is hydrophilic close kernel in modified dissaving polymer, and shell is by lipophilic group long-chain
Alkyl and hydrophilic group amino composition, form the different degree of substitution amphiphilic polymer with core-shell structure, number-average molecular weight point
Cloth is 8000~30000.
Secondly, by the mass ratio of control saturated fatty acid and hyperbranched polyethyleneimine, modified hyperbranched polymerization
Object makes it have higher interfacial activity since end group is partially substituted by lipophilic group chain alkyl, is guaranteeing that its is good
Water-soluble external chain alkyl can be such that it is dispersed in water-oil emulsion faster simultaneously, rapidly reach grease circle
Oil-water interfacial film is destroyed in face, while chain alkyl has stronger adsorption capacity, can adsorb more oil droplets, keeps it poly- simultaneously,
Float, be finally reached water-oil separating, break through existing demulsifier be only capable of making water phase reaches good de-oiling rate and oil is mutually still in
The oil-in-water emulsion of such demulsifier is added in the limitation of emulsion state, can reach water phase oil-containing within a short period of time
Amount is lower than 10%, while oily phase moisture content is lower than 0.1% hereinafter, forming clearly oil-water interfaces.
C in the present invention10~C18Saturated fatty acid be there is no the fatty acid of unsaturated bond (double bond) in a kind of carbochain.Make
To be preferred, the saturated fatty acid is selected from one or more of n-capric acid, lauric acid, myristic acid, palmitinic acid, stearic acid.
Further preferably palmitinic acid.
Amidation process of the present invention specifically includes:
1.1) saturated fatty acid is dissolved in organic solvent, catalyst n is added, then N '-carbonyl dimidazoles are added dropwise
Be dissolved in the hyperbranched polyethyleneimine of identical organic solvent, at 40~100 DEG C by 3~amidation process for 24 hours, obtain thick
Product；
1.2) crude product for obtaining step 1.1) rotates by concentration, acetone separation, obtains Ambident hyperbranched poly- second
Alkene imines.
Preferably, the mass ratio of the saturated fatty acid and hyperbranched polyethyleneimine is 0.5~2.
Preferably, the temperature of the amidation process is 50~70 DEG C, the reaction time is 6~12h.
Hyperbranched polyethyleneimine and N of the present invention, the mass ratio of N '-carbonyl dimidazoles are 0.5~1.5.
Organic solvent of the present invention is chloroform or methanol.
Additive amount of the Ambident hyperbranched polyethyleneimine of the present invention in oil-in-water emulsion is 10~80mg/
L.Additive amount is less than 10mg/L, and demulsification is bad；Additive amount is greater than 80mg/L, and demulsification variation is little, but economic cost
Increase very much.
The temperature of demulsification of the present invention is 25~65 DEG C, and the sedimentation time is 1~8h.Preferably, the temperature of the demulsification
Degree is 25~30 DEG C, and the sedimentation time is 300~360min.
Oil in heretofore described oil-in-water emulsion is mutually simulation oil or practical oil.Preferably, the simulation
Oil is n-dodecane, n-tridecane, n-tetradecane or hexadecane.Preferably, the practical oil is kerosene, diesel oil or vapour
Oil.
The salinity of water phase in heretofore described oil-in-water emulsion is 0~20000mg/L, wherein in water phase
NaCl and CaCl2Mass ratio be 0.1~1.5.
Compared with the existing technology, the beneficial effects of the present invention are embodied in:
(1) modified Ambident hyperbranched polyethyleneimine is partially substituted by lipophilic group due to end group in the present invention
Chain alkyl, shell contain strongly hydrophilic group amino and hydrophobic grouping chain alkyl simultaneously, are guaranteeing its good water solubility
While, oil-water interfaces can be quickly reached, destroy oil-water interfacial film, while external chain alkyl possesses stronger suction
Attached ability can adsorb more oil droplets, keep it poly- simultaneously, float, be finally reached water-oil separating.
(2) modified Ambident hyperbranched polyethyleneimine is used in the present invention, emulsion can not only be made quickly to reach
It is balanced to demulsification, obtains very high demulsification efficiency, water phase oil content is lower, and oil-water interfaces are unsharp after the demulsification of also big quantum jump
Limitation, such demulsifier can be such that oily phase moisture content is also preferably below under the premise of guaranteeing that water phase oil content is lower than 10%
0.1%, form clearly oil-water interfaces.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the modified amphiphilic hyper-branched polyethyleneimine of palmitinic acid in the present invention；
Fig. 2 is the structural schematic diagram of the modified amphiphilic hyper-branched polyethyleneimine of lauric acid in the present invention；
Fig. 3 compares figure for the demulsification of application examples 1 and comparative example 1~3；
Fig. 4 is that the demulsification of application examples 2,3,5 and 6 compares figure.
Specific embodiment
Below with reference to specific embodiment, present invention will be explained in further detail.
Embodiment 1: Ambident hyperbranched polyethyleneimine (HPEI-g-C16) preparation
It takes 2.78g palmitinic acid to be dissolved in 30mL chloroform, weighs 1.77g CDI and reaction system is added, stir molten to its
Xie Hou obtains palmitinic acid mixed liquor.2.5g HPEI is dissolved in 10mL chloroform, palmitinic acid is then added dropwise to
In mixed liquor, amidation process is carried out at 55 DEG C, reaction time 9h obtains the crude product of high polymerization degree；Then, crude product
It is poured into after being cooled to room temperature in 250mL acetone and stirs 60min, the thick liquid that yellow transparent can be observed is sunken to lower layer, discards
Upper layer acetone, repeats precipitating 2 times, and HPEI-g-C can be obtained in the lower 50 DEG C of revolvings of vacuum16。
Ambident hyperbranched polyethyleneimine (HPEI-g-C16) structural schematic diagram it is as shown in Figure 1, it should be noted that
Since dissaving structure is changeable and complicated, shown structure is merely illustrative.
Embodiment 2~7
Reference implementation example 1 carries out preparing Ambident hyperbranched polyethyleneimine, and specific process parameter is as shown in table 1, equal energy
Obtain Ambident hyperbranched polyethyleneimine.
Table 1: the preparation technology parameter of Examples 1 to 7 compares
Wherein, the Ambident hyperbranched polyethyleneimine (HPEI-g-C prepared in embodiment 212) structural schematic diagram as scheme
Shown in 2, it should be noted that since dissaving structure is changeable and complicated, shown structure is merely illustrative.
Application examples 1~7
The HPEI-g-C prepared in Examples 1 to 7 is weighed respectivelyn(number average molecular weight distribution is 10000~20000), with
For the concentration stirring and dissolving of 80mg/L in being oily phase with hexadecane, salinity is the oil-in-water emulsion of 5000mg/L.
Under 25 DEG C, 80mg/L concentration, the moisture content w of the upper oil phase when measurement sedimentation time is 360min, as a result such as
Shown in table 2.
Table 2: 1~7 moisture content of application examples compares
Analysis is it is found that the demulsifier performance prepared in Examples 1 to 7 is good, mainly by saturated fatty acid and super
The mass ratio that feeds intake of branched polyethylene imine is regulated and controled, the HPEI-g-C that the mass ratio that centainly feeds intake reactsnIt reduces boundary
The degree of face tension is high, is obviously improved emulsion droplet disintegration rate, and drain time is shorter, up to efficient demulsifier mesh
's.
Comparative example 1~3
Comparative example 1~3 is tested with reference to application examples 1, changes demulsifier type, only with the concentration stirring and dissolving of 80mg/L
In being oily phase with diesel oil, salinity is the oil-in-water emulsion of 5000mg/L.
Under 25 DEG C, 80mg/L concentration, sedimentation time 360min.Comparative example 1 is blank test.It is demulsified in comparative example 2
Agent is A (LSY-502, Tian Xin Chemical Co., Ltd.).Demulsifier is HPEI in comparative example 3.
The demulsification of application examples 1,2,3,5,6 and comparative example 1~3 is as shown in Figure 3 and Figure 4, illustrates HPEI-g-CnIt is broken
For emulsion on the basis of lower layer's water phase high de-oiling rate advantage can only be made by retaining original demulsifier, the moisture content of upper oil phase can be down to
It can be down to 0.5% or less in 2%, especially application examples 1.
Application examples 8
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with hexadecane, salinity is the oil-in-water emulsion of 0mg/L.Under 25 DEG C, 80mg/L concentration,
The moisture content of upper oil phase when the measurement sedimentation time is 360min.
The result shows that HPEI-g-C16Upper oil phase moisture content under this sedimentation time is only 0.34%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 36.8%, and still it is in the shape of emulsion
State.
Application examples 9
Weigh the HPEI-g-C in embodiment 212(number average molecular weight distribution is 10000~20000), with the concentration of 40mg/L
For stirring and dissolving in being oily phase with n-tridecane, salinity is the oil-in-water emulsion of 0mg/L.Under 25 DEG C, 40mg/L concentration,
The moisture content of upper oil phase when the measurement sedimentation time is 360min.
The result shows that HPEI-g-C12Upper oil phase moisture content under this sedimentation time is only 1.34%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 38.8%, and still it is in the shape of emulsion
State.
Application examples 10
Weigh the HPEI-g-C in embodiment 314(number average molecular weight distribution is 10000~20000), with the concentration of 60mg/L
For stirring and dissolving in being oily phase with hexadecane, salinity is the oil-in-water emulsion of 0mg/L.Under 45 DEG C, 60mg/L concentration,
The moisture content of upper oil phase when the measurement sedimentation time is 360min.
The result shows that HPEI-g-C14Upper oil phase moisture content under this sedimentation time is only 1.14%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 33.8%, and still it is in the shape of emulsion
State.
Application examples 11
Weigh the HPEI-g-C in embodiment 518(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with n-tetradecane, salinity is the oil-in-water emulsion of 0mg/L.Under 45 DEG C, 80mg/L concentration,
The moisture content of upper oil phase when the measurement sedimentation time is 360min.
The result shows that HPEI-g-C18Upper oil phase moisture content under this sedimentation time is only 0.88%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 32.8%, and still it is in the shape of emulsion
State.
Application examples 12
Weigh the HPEI-g-C in embodiment 610(number average molecular weight distribution is 10000~20000), with the concentration of 60mg/L
For stirring and dissolving in being oily phase with n-tridecane, salinity is the oil-in-water emulsion of 5000mg/L.At 60 DEG C, 60mg/L concentration
Under, the moisture content of the upper oil phase when measurement sedimentation time is 360min.
The result shows that HPEI-g-C10Upper oil phase moisture content under this sedimentation time is only 1.36%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 32.8%, and still it is in the shape of emulsion
State.
Application examples 13
Weigh the HPEI-g-C in embodiment 714(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with diesel oil, salinity is the oil-in-water emulsion of 0mg/L.Under 45 DEG C, 80mg/L concentration, measurement
The moisture content of upper oil phase when sedimentation time is 360min.
The result shows that HPEI-g-C14Upper oil phase moisture content under this sedimentation time is only 1.04%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 25.8%, and still it is in the shape of emulsion
State.
Application examples 14
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with gasoline, salinity is the oil-in-water emulsion of 15000mg/L.Under 45 DEG C, 80mg/L concentration,
The moisture content of upper oil phase when the measurement sedimentation time is 360min.
The result shows that HPEI-g-C16Upper oil phase moisture content under this sedimentation time is only 1.21%, and oil is mutually clear
Clearly；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 27.4%, and still it is in the shape of emulsion
State.
Application examples 15
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with diesel oil, salinity is the oil-in-water emulsion of 10000mg/L.Under 60 DEG C, 60mg/L concentration,
The moisture content of upper oil phase when the measurement sedimentation time is 360min.
The result shows that HPEI-g-C16Upper oil phase moisture content under this sedimentation time is only 0.043%, and oily phase
Clarification；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 22.1%, and still it is in emulsion
State.
Application examples 16
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with diesel oil, salinity is the oil-in-water emulsion of 0mg/L.Under 60 DEG C, 80mg/L concentration, measurement
The moisture content of upper oil phase when sedimentation time is 360min.
The result shows that HPEI-g-C16Upper oil phase moisture content under this sedimentation time is only 0.035%, and oily phase
Clarification；Compared to the demulsifier A for adding equivalent under equal conditions, upper layer moisture content 21.8%, and still it is in emulsion
State.
Application examples 17
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 40mg/L
For stirring and dissolving in being oily phase with hexadecane, salinity is the oil-in-water emulsion of 7500mg/L.It is heavy to survey respectively at 25 DEG C
The oil removal efficiency that time is 1min, 10min, 20min and 30min drops.The result shows that HPEI-g-C16Under these sedimentation times
Oil removal efficiency be respectively increased by 3% to 59%, 72%, 83% and 92%.
Application examples 18
Weigh the HPEI-g-C in embodiment 212(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with hexadecane, salinity is the oil-in-water emulsion of 0mg/L.When surveying sedimentation respectively at 60 DEG C
Between be 1min, 10min, 20min and 30min oil removal efficiency.The result shows that HPEI-g-C12Removing under these sedimentation times
Oily efficiency is respectively increased by 3% to 62%, 76%, 88% and 92%.
Application examples 19
Weigh the HPEI-g-C in embodiment 314Number average molecular weight distribution is 10000~20000), with the concentration of 40mg/L
For stirring and dissolving in being oily phase with n-tridecane, salinity is the oil-in-water emulsion of 5000mg/L.It is heavy to survey respectively at 45 DEG C
The oil removal efficiency that time is 1min, 10min, 20min and 30min drops.The result shows that HPEI-g-C14Under these sedimentation times
Oil removal efficiency be respectively increased by 3% to 55%, 72%, 80% and 91%.
Application examples 20
Weigh the HPEI-g-C in embodiment 518(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with hexadecane, salinity is the oil-in-water emulsion of 5000mg/L.It is heavy to survey respectively at 45 DEG C
The oil removal efficiency that time is 1min, 10min, 20min and 30min drops.The result shows that HPEI-g-C18Under these sedimentation times
Oil removal efficiency be respectively increased by 3% to 60%, 78%, 87% and 93%.
Application examples 21
Weigh the HPEI-g-C in embodiment 610(number average molecular weight distribution is 10000~20000), with the concentration of 60mg/L
For stirring and dissolving in being oily phase with aviation kerosine, salinity is the oil-in-water emulsion of 10000mg/L.It is heavy to survey respectively at 45 DEG C
The oil removal efficiency that time is 1min, 10min, 20min and 30min drops.The result shows that HPEI-g-C10Under these sedimentation times
Oil removal efficiency be respectively increased by 3% to 59%, 73%, 83% and 91%.
Application examples 22
Weigh the HPEI-g-C in embodiment 714(number average molecular weight distribution is 10000~20000), with the concentration of 20mg/L
For stirring and dissolving in being oily phase with gasoline, salinity is the oil-in-water emulsion of 10000mg/L.When surveying sedimentation respectively at 60 DEG C
Between be 1min, 10min, 20min and 30min oil removal efficiency.The result shows that HPEI-g-C14Removing under these sedimentation times
Oily efficiency is respectively increased by 3% to 50%, 70%, 85% and 90%.
Application examples 23
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 60mg/L
For stirring and dissolving in being oily phase with diesel oil, salinity is the oil-in-water emulsion of 15000mg/L.When surveying sedimentation respectively at 60 DEG C
Between be 1min, 10min, 20min and 30min oil removal efficiency.The result shows that HPEI-g-C16Removing under these sedimentation times
Oily efficiency is respectively increased by 3% to 60%, 80%, 90% and 97%.
Application examples 24
Weigh the HPEI-g-C in embodiment 116(number average molecular weight distribution is 10000~20000), with the concentration of 80mg/L
For stirring and dissolving in being oily phase with diesel oil, salinity is the oil-in-water emulsion of 15000mg/L.When surveying sedimentation respectively at 60 DEG C
Between be 1min, 10min, 20min and 30min oil removal efficiency.The result shows that HPEI-g-C16Removing under these sedimentation times
Oily efficiency is respectively increased by 3% to 64%, 82%, 91% and 97%.
Claims (8)
1. a kind of method being demulsified using Ambident hyperbranched polyethyleneimine to oil-in-water emulsion, feature are existed
In including the following steps:
1) by C10~C18Saturated fatty acid and hyperbranched polyethyleneimine carry out amidation process, obtain Ambident hyperbranched poly-
Aziridine；
The hydrophilic close kernel of the Ambident hyperbranched polyethyleneimine is hyperbranched polyethyleneimine, and shell is long by lipophilic group
Alkyl group and hydrophilic group amino composition, the number average molecular weight distribution of the Ambident hyperbranched polyethyleneimine is 8000~
30000；The mass ratio of the saturated fatty acid and hyperbranched polyethyleneimine is 0.5~2；
2) the Ambident hyperbranched polyethyleneimine is distributed in oil-in-water emulsion and is demulsified.
It is demulsified to oil-in-water emulsion 2. according to claim 1 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that the saturated fatty acid in n-capric acid, lauric acid, myristic acid, palmitinic acid, stearic acid one
Kind is several.
It is demulsified to oil-in-water emulsion 3. according to claim 1 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that the amidation process specifically includes:
1.1) saturated fatty acid is dissolved in organic solvent, catalyst n is added, then N '-carbonyl dimidazoles are added dropwise and are dissolved in
The hyperbranched polyethyleneimine of identical organic solvent, at 40~100 DEG C by 3~amidation process for 24 hours, slightly produced
Object；
1.2) crude product for obtaining step 1.1) rotates by concentration, acetone separation, obtains Ambident hyperbranched polyethyleneimine
Amine.
It is demulsified to oil-in-water emulsion 4. according to claim 3 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that the hyperbranched polyethyleneimine and N, the mass ratio of N '-carbonyl dimidazoles are 0.5~1.5.
It is demulsified to oil-in-water emulsion 5. according to claim 3 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that the organic solvent is chloroform or methanol.
It is demulsified to oil-in-water emulsion 6. according to claim 1 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that additive amount of the Ambident hyperbranched polyethyleneimine in oil-in-water emulsion be 10~
80mg/L。
It is demulsified to oil-in-water emulsion 7. according to claim 1 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that the temperature of the demulsification is 25~65 DEG C, and the sedimentation time is 1~8h.
It is demulsified to oil-in-water emulsion 8. according to claim 1 using Ambident hyperbranched polyethyleneimine
Method, which is characterized in that the salinity of the water phase in the oil-in-water emulsion is 0~20000mg/L.
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| DE4136661A1 (en) * | 1991-11-07 | 1993-05-13 | Basf Ag | PETROLEUM EMULSION SPLITTER |
| DE4418800A1 (en) * | 1994-05-30 | 1995-12-07 | Basf Ag | Sepg. water from crude oil |
| DE102004024532B4 (en) * | 2004-05-18 | 2006-05-04 | Clariant Gmbh | Demulsifiers for mixtures of middle distillates with fuel oils of vegetable or animal origin and water |
| EP3039057B1 (en) * | 2013-08-26 | 2018-10-10 | Basf Se | Alkoxylated polyethyleneimine with a low melting point |
| CN103709390B (en) * | 2013-12-20 | 2016-05-18 | 西南石油大学 | A kind of block polyether demulsifier taking polymine as initiator and preparation method thereof |
| CN105504306B (en) * | 2016-01-15 | 2018-03-16 | 浙江大学 | A kind of application of polyethers dissaving polymer as demulsifier |
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2018
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