CN110925599B - Efficient drag reducer and application method thereof - Google Patents
Efficient drag reducer and application method thereof Download PDFInfo
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- CN110925599B CN110925599B CN201911279463.5A CN201911279463A CN110925599B CN 110925599 B CN110925599 B CN 110925599B CN 201911279463 A CN201911279463 A CN 201911279463A CN 110925599 B CN110925599 B CN 110925599B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/17—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by mixing with another liquid, i.e. diluting
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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Abstract
The invention relates to the technical field of drag reducers, in particular to a high-efficiency drag reducer and a using method thereof. A high-efficiency drag reducer comprises a component A and a component B; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the raw materials for preparing the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator and an emulsifier; the mass ratio of the component A to the component B is 1: (0.8-1.2). The efficient drag reducer has strong anti-shearing performance, and is beneficial to reducing the turbulent resistance of oil products, increasing the flow velocity and improving the pipeline output.
Description
Technical Field
The invention belongs to the technical field of drag reducers, and particularly relates to an efficient drag reducer and a using method thereof.
Background
Chemical agents used to reduce the resistance to fluid flow are known as drag reducing agents. Mainly divided into two categories, water-soluble and oil-soluble. There are two classes of oil-soluble drag reducing agents that are of great interest: one is a surfactant compound, and the other is a high-flexibility linear polymer with ultrahigh molecular weight, which also has drag reduction effect, but the usage, dosage and advantages and disadvantages of the two drag reducers are greatly different. The surfactant drag reducer has good shear resistance, but poor economical efficiency, and is easy to pollute oil products due to large addition concentration. The high molecular polymer drag reducer is generally used in small amount, has good drag reduction and transportation increasing effects, is widely applied to crude oil pipeline transportation, and is an important means for improving the pipeline flow capacity and reducing energy consumption.
Currently, the most common polymer drag reducing agents are polyalphaolefins. The drag reducing polymer is highly susceptible to molecular chain cleavage and shear degradation during application, and the shear degradation property is permanent and irreversible, and the drag reducing agent loses its application properties. Therefore, the oil flows through a high-shear environment, and the drag reducer needs to be supplemented to maintain the drag reduction effect, and the process of continuously adding the drag reducer in a station is adopted to obtain the continuous and stable drag reduction effect in use. Therefore, it is necessary to develop a drag reducer with good shear resistance, so as to further improve the drag reduction effect, reduce the number of filling stations and save the cost.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a high-efficiency drag reducer comprising an a component and a B component; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the raw materials for preparing the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator and an emulsifier; the mass ratio of the component A to the component B is 1: (0.8-1.2).
As a preferable technical scheme, the weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier is (25-35): 1: (0.2-0.4): (2-6).
As a preferable technical scheme, the long-chain alkyl methacrylate is selected from one of octadecyl methacrylate, hexadecyl methacrylate and dodecyl methacrylate.
As a preferable technical scheme, the preparation raw material of the component B also comprises modified wood powder and a compatilizer; the mass of the compatilizer is 20-26% of that of the long-chain alkyl methacrylate; the mass of the modified wood powder is 4-5% of that of the long-chain alkyl methacrylate.
As a preferable technical scheme, the preparation method of the modified wood flour comprises the following steps: the modified wood powder is prepared by sequentially carrying out plasma treatment and silane coupling agent treatment.
As a preferable technical scheme, the plasma treatment is oxygen low-temperature plasma treatment; the silane coupling agent is at least one selected from gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane and gamma-mercaptopropyltrimethoxysilane.
As a preferable technical scheme, the silane coupling agent is a mixture of gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
As a preferable technical scheme, the mass ratio of the gamma-aminopropyltriethoxysilane to the gamma-glycidoxypropyltrimethoxysilane is 1: (0.5-1.0).
In a second aspect, the present invention provides a method for using a high-efficiency drag reducer, as described above, comprising the steps of: when in use, the component A and the component B are mixed in the fluid according to the mass ratio.
Has the advantages that: according to the invention, the modified wood flour is added into the preparation raw material of the component B, and the modified wood flour generates a stress concentration effect in the high molecular polymer to cause the high molecular polymer to generate silver lines and plastic deformation, so that impact energy is absorbed, the occurrence of chain scission decomposition of the high molecular polymer is reduced, and the shear resistance of the polymer is further improved. In addition, the component A and the component B are mixed and used in the using process to synergistically promote the anti-shearing performance of the drag reducer, and the anti-shearing performance of the drag reducer is helped to reduce the turbulent flow resistance of oil products, increase the flow rate and improve the pipeline transportation capacity, so that the using time of the drag reducer is prolonged in the pipeline transportation process, the frequency of adding the drag reducer is reduced, the injection sites of the drag reducer can be relatively reduced in the whole transportation process, the construction of instruments and equipment is finally reduced, and the labor cost is reduced.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "including". As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase will render the claim closed except for the materials described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein in the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received by modifying or otherwise modifying such quantity without substantially changing the basic function to which it is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
The invention provides a high-efficiency drag reducer in a first aspect, which comprises a component A and a component B; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the raw materials for preparing the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator and an emulsifier; the mass ratio of the component A to the component B is 1: (0.8-1.2).
In a preferred embodiment, a high performance drag reducer comprises an a component and a B component; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the raw materials for preparing the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator and an emulsifier; the mass ratio of the component A to the component B is 1: 1.
in a preferred embodiment, the weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier is (25-35): 1: (0.2-0.4): (2-6).
In a preferred embodiment, the weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier is 30: 1: 0.3: 4.
in a preferred embodiment, the preparation raw material of the component B also comprises modified wood flour and a compatilizer; the mass of the compatilizer is 20-26% of that of the long-chain alkyl methacrylate; the mass of the modified wood powder is 4-5% of that of the long-chain alkyl methacrylate.
In a preferred embodiment, the preparation raw material of the component B also comprises modified wood flour and a compatilizer; the mass of the compatilizer is 23% of that of the long-chain alkyl methacrylate; the mass of the modified wood powder is 4.5% of that of the long-chain alkyl methacrylate.
Polyquaternium-11
The polyquaternium-11 is a diethyl sulfate compound of 2-methyl-2-acrylic acid-2- (dimethylamino) ethyl ester and 1-vinyl-2-pyrrolidone polymer, and has the CAS number: 53633-54-8.
The polyquaternium-11 was purchased from Shanghai-derived leaf Biotech, Inc.
Long chain alkyl methacrylates
The long-chain alkyl methacrylate is an ester of methacrylic acid and a long-chain alkyl alcohol. The number of carbon in the long-chain alkyl alcohol is 10-20.
In one embodiment, the long chain alkyl methacrylate is selected from one of octadecyl methacrylate, hexadecyl methacrylate, and dodecyl methacrylate.
In a preferred embodiment, the long chain alkyl methacrylate is octadecyl methacrylate.
The octadecyl methacrylate was purchased from Shanghai Xinyu Biotech, Inc. under CAS number 112-08-3.
Acrylic acid
In one embodiment, the acrylic acid is selected from one of 6-hydroxyhexylacrylic acid, 2, 3-dihydroxypropylacrylic acid, 2-ethoxyethylacrylic acid.
In a preferred embodiment, the acrylate is 2, 3-dihydroxypropyl acrylic acid.
The 2, 3-dihydroxypropyl acrylic acid was purchased from Jiangsu Aikang biomedical research and development Co.
Initiator
The initiator is a compound which is easily decomposed into free radicals by heating, can be used for initiating free radical polymerization and copolymerization of alkene and diene monomers, and can also be used for crosslinking curing and macromolecular crosslinking reaction of unsaturated polyester. As the initiator, a radical polymerization initiator, a cationic polymerization initiator, an anionic polymerization initiator and a coordination polymerization initiator are usually used. Commonly used free radical initiators include thermal decomposition initiators and redox initiators.
In one embodiment, the initiator is a mixture of potassium persulfate and sodium sulfite.
In a preferred embodiment, the molar ratio of potassium persulfate to sodium sulfite is 2: 3.
emulsifier
The emulsifier of the present invention is a compound capable of forming a stable emulsion from a mixture of two or more immiscible components. The principle of action is that during the emulsification process, the dispersed phase is dispersed in the form of droplets in the continuous phase, and the emulsifier reduces the interfacial tension of the components in the mixed system and forms a firmer film on the surface of the droplets or forms an electric double layer on the surface of the droplets due to the electric charge given by the emulsifier, thus preventing the droplets from aggregating with each other and maintaining a uniform emulsion.
In one embodiment, the emulsifier is octylphenyl polyoxyethylene ether.
The octyl phenyl polyoxyethylene ether is purchased from Shanghai Shanding Biotech Co., Ltd, and has a CAS number of 9002-93-1.
Modified wood flour
The modified wood flour of the invention is used for modifying the surface of the wood flour, thereby increasing the dispersibility and compatibility of the wood flour in polymers.
In one embodiment, the method of preparing the modified wood flour comprises the steps of: the modified wood powder is prepared by sequentially carrying out plasma treatment and silane coupling agent treatment.
In a preferred embodiment, the method of preparing the modified wood flour comprises the steps of: firstly, wood flour is treated by plasma and then dissolved in ethanol solution containing 4 wt% of silane coupling agent, the mixture is kept stand for 10-20min at 20-30 ℃, then the ethanol is removed by evaporation at 80-90 ℃, and the drying is carried out for 12-24 h.
The wood flour is a natural organic wood high polymer material, has the characteristics of reproducibility, low carbon, energy conservation, environmental protection and the like, mainly comprises cellulose, hemicellulose, lignin and the like, and has the characteristic of partial rubber materials because a basic molecular chain structural unit has higher rigidity and flexibility. The surface of the material is rich in hydroxyl groups, so that the material has certain hydrophilicity.
In a preferred embodiment, the mass ratio of wood flour to silane coupling agent is 1: 0.12.
in a preferred embodiment, the particle size of the wood flour is 250 mesh or larger.
In a preferred embodiment, the plasma treatment is an oxygen low temperature plasma treatment.
The oxygen low-temperature plasma treatment has good uniformity of surface treatment on the material, does not damage the material matrix, and has short reaction time and high efficiency.
In a preferred embodiment, the silane coupling agent is selected from at least one of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane.
In a preferred embodiment, the silane coupling agent is a mixture of gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
In a preferred embodiment, the mass ratio of gamma-aminopropyltriethoxysilane to gamma-glycidoxypropyltrimethoxysilane is 1: (0.5-1.0).
In a more preferred embodiment, the mass ratio of gamma-aminopropyltriethoxysilane to gamma-glycidoxypropyltrimethoxysilane is 1: 0.8.
the 250-mesh wood flour is wood flour of Changzhou city Wu Advance zone Yanlingsen, Inc.
The inventors have found that the shear resistance of a high molecular polymer can be improved by adding modified wood flour to the high molecular polymer. The possible reasons are that 1, the low-temperature plasma treatment can fully enhance the number of surface active groups of the wood flour, and the oleophylic property is increased after the treatment by adopting the silane coupling agent, so that the dispersibility and the compatibility of the wood flour in the high polymer are increased; 2, the modified wood flour improves the nucleation effect of the wood flour on the high molecular polymer, generates more small crystal grain structures and achieves the purpose of enhancing the shear resistance of the high molecular polymer; 3, the modified wood powder is dispersed in the high molecular polymer and used as a stress concentrator to initiate the generation of silver streaks, and the silver streaks can attract impact energy, delay the impact damage of the high molecular polymer and achieve the purpose of enhancing the shear resistance of the high molecular polymer; 4, the modified wood flour has great influence on the grain size of the composite system, and a part of small-sized grain structures can be additionally generated, and the structure can increase the shearing force bearing area of the high molecular polymer, so that the damage degree of the shearing stress to the high molecular polymer is reduced.
In addition, the inventor of the invention has long studied and found that when the gamma-aminopropyltriethoxysilane and the gamma-glycidoxypropyltrimethoxysilane are mixed and then used for modifying the wood flour, the shear resistance effect is most outstanding. The possible reasons are that the gamma-aminopropyl triethoxysilane can improve the surface binding capacity and the dispersion effect of the wood flour in the high molecular polymer solution, the gamma-glycidoxypropyl trimethoxysilane is used as an auxiliary coupling agent of the gamma-aminopropyl triethoxysilane, the adhesion effect of the gamma-aminopropyl triethoxysilane can be improved when the gamma-aminopropyl triethoxysilane is matched for use, and simultaneously the dispersion performance and the free radical activity of the gamma-aminopropyl triethoxysilane are improved as an auxiliary agent. The characteristics of the wood flour and the high molecular polymer are complementary and coordinated to generate a synergistic effect, and the wood flour and the high molecular polymer play a positive role in improving the composite effect of the wood flour and the high molecular polymer.
Compatilizer
The compatilizer is a high-molecular grafted product, the current better compatilizer is grafted by maleic anhydride, and maleic anhydride monomers and other monomers have stronger polarity and better compatilized effect. The maleic anhydride grafting compatilizer leads the material to have high polarity and reactivity by introducing strong polar reactive groups, and is a polymer interface coupling agent, a compatilizer and a dispersion promoter. The compatibilizing agent is not strictly limited in the present invention.
In a preferred embodiment, the compatibilizer is a polypropylene graft anhydride copolymer.
The polypropylene graft anhydride copolymer is purchased from Gallery Haoyang Plastic technology Limited, and has a model of HZ-201.
In one embodiment, the method of making the B-component comprises the steps of:
(1) adding an emulsifier, long-chain alkyl methacrylate and acrylic acid into water, and stirring to emulsify the mixture to obtain an emulsion;
(2) a15 wt% emulsion was taken and bubbled with nitrogen for 30 minutes. Then adding 0.2 wt% of initiator aqueous solution, reacting at 30 ℃ and 300rpm for 1h, continuously adding the rest emulsion in a dropwise manner, continuously introducing nitrogen for protection, stirring for reacting for 10-15h, adding modified wood powder and compatilizer, and stirring for reacting for 2h at 60-80 ℃ to obtain copolymer emulsion;
(3) adding ethanol into the copolymer emulsion to coagulate and precipitate the polymer in the emulsion, filtering and drying to obtain the component B.
In a second aspect, the present invention provides a method for using a high-efficiency drag reducer, as described above, comprising the steps of: when in use, the component A and the component B are mixed in the fluid according to the mass ratio.
The inventors have found, through long-term research, that the drag reducing agent has the best drag reducing effect when the drag reducing agent comprises a component A and a component B. The possible reason is that the component A and the component B are associated through hydrogen bonds and promote ester groups of long chains to alternate under the action of Van der Waals force to form a ladder-shaped chain, so that the shearing force born by one high molecular chain originally is dispersed to the two chains, and in addition, the two high molecular chains can mutually provide great hydrodynamic shielding for the other side in a fluid, so that the force born by the chain center is weakened, and the drag reduction effect of the drag reduction agent is improved.
Examples
In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention. In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
Example 1 provides a high efficiency drag reducer comprising an a component and a B component; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the preparation raw materials of the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator, an emulsifier, modified wood powder and a compatilizer; the mass ratio of the component A to the component B is 1: 1.
the CAS number of the polyquaternium-11 is 53633-54-8.
The weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier to the modified wood powder to the compatilizer is 30: 1: 0.3: 4: 6.9: 1.35.
the long-chain alkyl methacrylate is octadecyl methacrylate.
The acrylic acid is 2, 3-dihydroxypropyl acrylic acid.
The initiator is a mixture of potassium persulfate and sodium sulfite.
The molar ratio of the potassium persulfate to the sodium sulfite is 2: 3.
the emulsifier is octyl phenyl polyoxyethylene ether.
The preparation method of the modified wood flour comprises the following steps: firstly, wood flour is treated by oxygen low-temperature plasma, then dissolved in ethanol solution containing 4 wt% of silane coupling agent, kept stand for 15min at 25 ℃, evaporated in water bath at 85 ℃ to remove ethanol, and dried for 18 h.
The grain size of the wood powder is 250 meshes.
The mass ratio of the wood powder to the silane coupling agent is 1: 0.12.
the silane coupling agent is a mixture of gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
The mass ratio of the gamma-aminopropyltriethoxysilane to the gamma-glycidoxypropyltrimethoxysilane is 1: 0.8.
the compatilizer is polypropylene grafted anhydride copolymer.
The type of the polypropylene grafted anhydride copolymer is HZ-201.
The preparation method of the component B comprises the following steps:
(1) adding an emulsifier, long-chain alkyl methacrylate and acrylic acid into water, and stirring to emulsify the mixture to obtain an emulsion;
(2) a15 wt% emulsion was taken and bubbled with nitrogen for 30 minutes. Then adding 0.2 wt% of initiator aqueous solution, reacting at 30 ℃ and 300rpm for 1h, continuously adding the rest emulsion in a dropwise manner, continuously introducing nitrogen for protection, stirring for reacting for 10-15h, adding modified wood powder and compatilizer, and stirring for reacting for 2h at 60-80 ℃ to obtain copolymer emulsion;
(3) adding ethanol into the copolymer emulsion to coagulate and precipitate the polymer in the emulsion, filtering and drying to obtain the component B.
The method for using the high-efficiency drag reducer comprises the following steps: when in use, the component A and the component B are mixed in the fluid according to the mass ratio.
Example 2
Example 2 is essentially the same as example 1, except that: a high-efficiency drag reducer comprises a component A and a component B; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the preparation raw materials of the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator, an emulsifier, modified wood powder and a compatilizer; the mass ratio of the component A to the component B is 1: 0.8.
the weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier to the modified wood powder to the compatilizer is 25: 1: 0.2: 2: 5.75: 1.13.
example 3
Example 3 is essentially the same as example 1, except that: a high-efficiency drag reducer comprises a component A and a component B; the preparation raw material of the component A comprises polyquaternium-11; the component B is alpha-olefin copolymer; the preparation raw materials of the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator, an emulsifier, modified wood powder and a compatilizer; the mass ratio of the component A to the component B is 1: 1.2.
the weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier to the modified wood powder to the compatilizer is 35: 1: 0.4: 6: 8.05: 1.58.
comparative example 1
Comparative example 1 is essentially the same as example 1 except that: the raw materials for preparing the high-efficiency drag reducer comprise long-chain alkyl methacrylate, acrylic acid, an initiator, an emulsifier, modified wood powder and a compatilizer.
Comparative example 2
Comparative example 2 is essentially the same as example 1 except that: the raw materials for preparing the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator and an emulsifier.
Comparative example 3
Comparative example 3 is essentially the same as example 1 except that: the preparation method of the modified wood flour comprises the following steps: and (3) carrying out oxygen low-temperature plasma treatment on the wood powder.
Comparative example 4
Comparative example 4 is essentially the same as example 1 except that: the preparation method of the modified wood flour comprises the following steps: dissolving wood powder in ethanol solution containing 4 wt% of silane coupling agent, standing at 25 deg.C for 15min, evaporating in water bath at 85 deg.C to remove ethanol, and oven drying for 18 h.
Comparative example 5
Comparative example 5 is essentially the same as example 1, except that: the silane coupling agent is gamma-aminopropyl triethoxysilane.
Comparative example 6
Comparative example 6 is essentially the same as example 1, except that: the grain size of the wood powder is 30 meshes.
Comparative example 7
Comparative example 7 is essentially the same as example 1 except that: the molar ratio of the potassium persulfate to the sodium sulfite is 3: 2.
evaluation of Performance
The resistance reduction rate test method comprises the following steps: the polymer drag reduction was measured on a loop evaluation apparatus according to SY/T6578-.
The design parameters and specifications of the loop evaluation device are as follows: 50L of diluting and stirring tank, 50L of reflux tank, 0-80L/min of flow sensor, 0-1Mpa of pressure sensor and seamless steel pipe of test pipeline.
The specific determination method is as follows: adding the synthesized component B and component A into 0# diesel oil, adding zeolite, heating to 100 deg.C, magnetically stirring for 6 hr, removing water, cooling to room temperature, and stirring for 5-7 days to dissolve the polymer. The dissolved component A and the component B are added into the diesel oil to be tested according to the proportion set by the embodiment and the comparative example to prepare a diesel oil solution, and then the diesel oil solution enters a dilution tank to be diluted, so that the mass concentration of the diesel oil solution in a pipeline is ensured to be 10 ppm.
The drag reduction ratio is calculated by the formula: DR% (. DELTA.P)0-△PDR/△P0)×100％；
△P0Pressure drop, Pa, of friction resistance at two ends of the pipeline when no agent is added;
delta PDR-friction resistance pressure drop, Pa, at the two ends of the pipeline under the same flow after adding the agent.
The results obtained were as follows:
TABLE 1 results of drag reduction ratio test of high performance drag reducers prepared in examples and comparative examples
From the above table, it can be seen that the drag reducer prepared by the invention has less drag reduction rate decrease with the increase of the cycle number, which proves that the drag reducer has excellent drag reduction effect.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (6)
1. The efficient drag reducer is characterized by comprising a component A and a component B; the component A is prepared from a raw material comprising polyquaternium-11; the component B is alpha-olefin copolymer; the raw materials for preparing the component B comprise long-chain alkyl methacrylate, acrylic acid, an initiator and an emulsifier; the mass ratio of the component A to the component B is 1: (0.8-1.2);
the weight ratio of the long-chain alkyl methacrylate to the acrylic acid to the initiator to the emulsifier is (25-35): 1: (0.2-0.4): (2-6);
the preparation raw materials of the component B also comprise modified wood powder and a compatilizer; the mass of the compatilizer is 20-26% of that of the long-chain alkyl methacrylate; the mass of the modified wood powder is 4-5% of that of the long-chain alkyl methacrylate;
the preparation method of the modified wood flour comprises the following steps: sequentially carrying out plasma treatment and silane coupling agent treatment to obtain modified wood powder;
the plasma treatment is oxygen low-temperature plasma treatment; the silane coupling agent is at least one selected from gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane and gamma-mercaptopropyltrimethoxysilane.
2. The efficient drag reducer according to claim 1, wherein the weight ratio of the long-chain alkyl methacrylate, the acrylic acid, the initiator and the emulsifier is 30: 1: 0.3: 4.
3. the efficient drag reducer of claim 1, wherein said long chain alkyl methacrylate is selected from the group consisting of octadecyl methacrylate, hexadecyl methacrylate, and dodecyl methacrylate.
4. The efficient drag reducer of claim 1, wherein said silane coupling agent is a mixture of gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
5. The efficient drag reducer according to claim 4, wherein the mass ratio of gamma-aminopropyltriethoxysilane to gamma-glycidoxypropyltrimethoxysilane is 1: (0.5-1.0).
6. A method of using a high efficiency drag reducer according to any one of claims 1-5, comprising the steps of: when in use, the component A and the component B are mixed in the fluid according to the mass ratio.
Priority Applications (1)
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| US4508128A (en) * | 1983-11-02 | 1985-04-02 | Exxon Research & Engineering Co. | Drag reduction agent for hydrocarbon liquid |
| CN1513018A (en) * | 2001-09-28 | 2004-07-14 | ��ŵ�Ʒ����ֹ�˾ | Method of manufacturing drag-reducing polymer suspensions |
| CN101544766A (en) * | 2008-03-28 | 2009-09-30 | 中国石油天然气股份有限公司 | Preparation method of poly alpha-olefin drag reducer suspension |
| CN103030740A (en) * | 2012-12-11 | 2013-04-10 | 新疆大学 | Poly-alpha-olefin drag reduction agent and preparation method thereof |
| CN107652958A (en) * | 2017-10-25 | 2018-02-02 | 成都凯米拉科技有限公司 | A kind of compound hydrate inhibitor of oil-gas gathering and transportation |
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| US4508128A (en) * | 1983-11-02 | 1985-04-02 | Exxon Research & Engineering Co. | Drag reduction agent for hydrocarbon liquid |
| CN1513018A (en) * | 2001-09-28 | 2004-07-14 | ��ŵ�Ʒ����ֹ�˾ | Method of manufacturing drag-reducing polymer suspensions |
| CN101544766A (en) * | 2008-03-28 | 2009-09-30 | 中国石油天然气股份有限公司 | Preparation method of poly alpha-olefin drag reducer suspension |
| CN103030740A (en) * | 2012-12-11 | 2013-04-10 | 新疆大学 | Poly-alpha-olefin drag reduction agent and preparation method thereof |
| CN107652958A (en) * | 2017-10-25 | 2018-02-02 | 成都凯米拉科技有限公司 | A kind of compound hydrate inhibitor of oil-gas gathering and transportation |
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