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CN109705830A - One type magnetism delays swollen volume expansion grain and preparation method thereof - Google Patents

One type magnetism delays swollen volume expansion grain and preparation method thereof Download PDF

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Publication number
CN109705830A
CN109705830A CN201910064192.5A CN201910064192A CN109705830A CN 109705830 A CN109705830 A CN 109705830A CN 201910064192 A CN201910064192 A CN 201910064192A CN 109705830 A CN109705830 A CN 109705830A
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volume expansion
expansion grain
type
class
grain
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CN109705830B (en
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唐菲利
刘雅红
柏清
郝栩麟
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NANTONG KEYI CHEMICAL CO Ltd
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NANTONG KEYI CHEMICAL CO Ltd
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Abstract

The invention discloses a type magnetism to delay swollen volume expansion grain, the N-type volume expansion grain of S type volume expansion grain 25~75wt% and 25~75wt% including 25~75wt%.Class magnetism of the invention delays swollen volume expansion grain and contains S type and N-type monomer, and the heat and salinity tolerance performance of two class monomers is better than common volume expansion grain, still can achieve under the conditions of high temperature and high salinity and delays performance that is swollen and attracting aggregation.

Description

One type magnetism delays swollen volume expansion grain and preparation method thereof
Technical field
The present invention relates to oil field profile control agent fields, and in particular to be that a type magnetism delays swollen volume expansion grain and its preparation side Method.
Background technique
It has a large amount of water in the recovery process of petroleum to generate, the stratum of heterogeneity is to displacements such as polymer flooding, water drives The sweep efficiency of liquid influences increasingly serious, it is desirable to reach higher oil recovery factor, only pass through improved, more efficient deep The technology of profile control effectively improves the heterogeneity of oil reservoir, to improve the sweep efficiency of profile control solution, to can just significantly improve note Enter water in the oil recovery factor in water filling stage.Water flood field development late stage fracture reservoir forms the inefficient circulation of injection water, Water is caused excessively to produce and oil production rapid decrease.By changing the flow direction of water stream channel, moisture content is reduced, output water pair is reduced The influence of environment.Water blockoff, tune are taken for the various oil, well of fluid-channeling channel type (extra-high permeability, crack, macropore) oil reservoir The technology of cuing open can greatly improve oil recovery factor.Therefore, it is a kind of robust techniques that crosslinking polymer, which opposes and improves recovery ratio, One of.
Currently used volume expansion grain and hydroexpanding body are relatively more, they meet water and expand, and reach maximum swollen in 24 hours Swollen multiple has direct pass using deep-well transfer drive, the particle size and water plugging effect of volume expansion grain still, is unfavorable near wellbore formation System, has the water-absorption particle of as low as nanometer in the market, also there is the bulky grain greatly to millimeter.Each partial size has to answer corresponding water blockoff hole Hole dia, only stifled hole diameter in need quite just can be effective with product diameter used.Due to the limitation recognized stratum Property, and to increase many chance components between stifled and not stifled in the crushing performance unevenness of particle moving process, increase Delayed expansion, crush resistance, elasticity and the crushing resistance of grain are the projects of particle blocking agent.
Summary of the invention
In view of the above shortcomings, the purpose of the present invention is to provide a kind of solutions to delay expansion, solves crush resistance, together When have both the volume expansion grain of certain elasticity and crushing resistance.This is a kind of product mixed by two kinds of polymer, in polymer It is middle to introduce a large amount of hydrophobic monomer, nonionic and add required inorganic matter, polymer ions intensity is reduced, to prolong Slow water swelling time;The monomer to attract each other is divided into S class and N class, changes the different content of S and N class monomer, preparation is different Volume expansion grain, and control required partial size, in the synthesis process, the swollen particle of diplobiont is prepared respectively, S type volume expansion grain, The monomer of S containing different proportion;N-type volume expansion grain, the monomer of N containing different proportion;When product inject stratum when under the effect of external force, Grain can also be bound together again after being broken, and with the movement of particle, according to the size of stratum Hole diameter, particle can Freely to separate (when thering is external pressure and space to limit), while shape together can be freely combined again in large space and without external pressure when At aggregation shape.Both contain the volume expansion grain of S type monomer and the synthesis of N-type monomer, after water suction in certain particle size range, they Between attraction they can be flocked together again completely, formed dough.Under external force, they can divide again It opens, attracting each other between this phenomenon and magnet is much like with repulsion, therefore is named as class magnetism and delays swollen volume expansion grain.
Technical solution of the present invention is summarized as follows:
One type magnetism delays swollen volume expansion grain, wherein S 25~75wt% of type volume expansion grain and 25 including 25~75wt% The N-type volume expansion grain of~75wt%.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the S type volume expansion grain includes 10~15wt% Acrylamide monomer, 3~5wt%S type function monomer, 5~10wt% 2-Hydroxy ethyl acrylate, 5~10wt% metering system Sour methyl esters, 5~10wt% nonionic, 3~10wt% inorganic matter, 0.1~0.5wt% crosslinking agent, 20~55wt% go from Sub- water.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the N-type volume expansion grain includes 10~15wt% Acrylamide monomer, 3~5wt%N type function monomer, 5~10wt% 2-Hydroxy ethyl acrylate, 5~10wt% metering system Sour methyl esters, 5~10wt% nonionic, 3~10wt% inorganic matter, 0.1~0.5wt% crosslinking agent, 20~55wt% go from Sub- water.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the S type function monomer is selected from sodium acrylate, 2- One of acrylamide-2-methyl propane sulfonic sodium, n-vinyl pyrrolidone, sodium styrene sulfonate, maleimide are more Kind.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the N-type function monomer is selected from methacryl One of oxy-ethyl-trimethyl salmiac, dimethyl diallyl ammonium chloride, acryloyloxytrimethylammonium ammonium chloride are a variety of.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the nonionic is selected from guar gum, starch One of or combinations thereof.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the inorganic matter is selected from active carbon, carbon fiber, cunning One of mountain flour or combinations thereof.
Preferably, the class magnetism delays swollen volume expansion grain, wherein the crosslinking agent is selected from N, N methylene acryloyl One of amine, divinylbenzene or combinations thereof.
One type magnetism delays the preparation method of swollen volume expansion grain, wherein the following steps are included:
A) preparation of the S type volume expansion grain
(1) raw material is weighed by weight, deionized water is added in the first dissolution kettle, and sequentially add acrylamide, S type Function monomer, 2-Hydroxy ethyl acrylate, methyl methacrylate, nonionic, inorganic matter and crosslinking agent stirring and dissolving, Obtain the first mixed liquor;
(2) the first mixed liquor pH value is adjusted to 5.5~6.5, controlled at 25~27 DEG C, is then added into reaction kettle In, sequentially add under nitrogen protection the catalyst V50 of 0.1~1.0wt%, the potassium peroxydisulfate of 0.3~1.0wt% and 0.5~ The sodium hydrogensulfite of 1.5wt%, until system becomes viscous, it is mixed to obtain second for stopping nitrogen blowing for the inflated with nitrogen mixing into reaction kettle Close liquid;
(3) the second mixed liquor is kept the temperature 5 hours at 85~95 DEG C and obtains the first colloid, by the first granulating from colloid, drying, powder It is broken to obtain S type volume expansion grain;
B) preparation of the N-type volume expansion grain
(I) raw material is weighed by weight, deionized water is added in the second dissolution kettle, and sequentially add acrylamide, N-type Function monomer, 2-Hydroxy ethyl acrylate, methyl methacrylate, nonionic, inorganic matter and crosslinking agent stirring and dissolving, Obtain third mixed liquor;
(II) third mixed liquor pH value is adjusted to 5.5~6.5, controlled at 20~25 DEG C, is then added into reaction In kettle, the catalyst V50 of 0.5~1.5wt%, the potassium peroxydisulfate and 0.5 of 0.5~1.0wt% are sequentially added under nitrogen protection The sodium hydrogensulfite of~1.5wt%, and inflated with nitrogen mixing stops nitrogen blowing, obtains the until system becomes viscous into reaction kettle Four mixed liquors;
(III) the 4th mixed liquor is kept the temperature 5 hours at 85-95 DEG C and obtains the second colloid, by the second granulating from colloid, drying, powder It is broken to obtain N-type volume expansion grain;
C) the class magnetism delays the preparation of swollen volume expansion grain
N-type volume expansion grain obtained in S type volume expansion grain obtained in step a), step b) is mixed in the ratio and is stirred It mixes 20 minutes, obtains the class magnetism and delay swollen volume expansion grain.
Preferably, the class magnetism delays the preparation method of swollen volume expansion grain, wherein the N-type volume expansion grain and S type Volume expansion grain partial size is 60~150 mesh.
The beneficial effects of the present invention are:
(1) class magnetism of the invention delays swollen volume expansion grain and contains S type and N-type monomer, the heat and salinity tolerance performance of two class monomers Better than common volume expansion grain, it still can achieve under the conditions of high temperature and high salinity and delay performance that is swollen and attracting aggregation.
(2) class magnetism of the invention is delayed swollen volume expansion grain and is prepared using aqueous solution chlorination reduction catalysts polymerization, is dropping While the ionic strength of low product and nonionic is introduced, so that polymer, which has, significantly delays swollen performance, and enough Flexibility, can satisfy the profile control demand on deep-well stratum;By introducing inorganic matter, the resistance to compression energy of product is greatly enhanced Power.
(3) after N/S type absorbs water respectively, dispersed at them, but if they form state of aggregation after the two is mixed, this Illustrate binding force attractive between N-type and S type, that is, flocking together, this state of aggregation under external force, can be with It is stabilized, when binding force is more than a critical value, they can scatter again.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification Text can be implemented accordingly.
The invention discloses a type magnetism to delay swollen volume expansion grain, and the S type volume expansion grain 25 including 25~75wt%~ The N-type volume expansion grain of 75wt% and 25~75wt%.
As the another embodiment of this case, wherein S type volume expansion grain include 10~15wt% acrylamide monomer, 3~ 5wt%S type function monomer, 5~10wt% 2-Hydroxy ethyl acrylate, 5~10wt% methyl methacrylate, 5~10wt% Nonionic, 3~10wt% inorganic matter, 0.1~0.5wt% crosslinking agent, 20~55wt% deionized water.
As the another embodiment of this case, wherein N-type volume expansion grain include 10~15wt% acrylamide monomer, 3~ 5wt%N type function monomer, 5~10wt% 2-Hydroxy ethyl acrylate, 5~10wt% methyl methacrylate, 5~10wt% Nonionic, 3~10wt% inorganic matter, 0.1~0.5wt% crosslinking agent, 20~55wt% deionized water.
As the another embodiment of this case, wherein S type function monomer is selected from sodium acrylate, 2- acrylamide -2- methyl-prop sulphur One of sour sodium, n-vinyl pyrrolidone, sodium styrene sulfonate, maleimide are a variety of.
As the another embodiment of this case, wherein N-type function monomer be selected from MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, One of dimethyl diallyl ammonium chloride, acryloyloxytrimethylammonium ammonium chloride are a variety of.
As the another embodiment of this case, wherein nonionic is selected from one of guar gum, starch or combinations thereof.It is logical Addition nonionic is crossed, so that polymer, which has, significantly delays swollen performance and enough flexibilities, with can satisfy deep-well The profile control demand of layer, the preferred nonionic of this case are guar gum, in starch.
As the another embodiment of this case, wherein inorganic matter is selected from one of active carbon, carbon fiber, talcum powder or a variety of.
As the another embodiment of this case, wherein crosslinking agent is selected from N, and one in N methylene acrylamide, divinylbenzene Kind or combinations thereof.
One type magnetism delays the preparation method of swollen volume expansion grain, wherein the following steps are included:
A) preparation of S type volume expansion grain
(1) by weight raw material is weighed, deionized water is added in the first dissolution kettle, and sequentially add acrylamide, S type Function monomer, 2-Hydroxy ethyl acrylate, methyl methacrylate, nonionic, inorganic matter and crosslinking agent stirring and dissolving, Obtain the first mixed liquor;
(2) the first mixed liquor pH value is adjusted to 5.5~6.5, controlled at 25~27 DEG C, is then added into reaction kettle In, sequentially add under nitrogen protection the catalyst V50 of 0.1~1.0wt%, the potassium peroxydisulfate of 0.3~1.0wt% and 0.5~ The sodium hydrogensulfite of 1.5wt%, until system becomes viscous, it is mixed to obtain second for stopping nitrogen blowing for the inflated with nitrogen mixing into reaction kettle Close liquid;
(3) the second mixed liquor is kept the temperature 5 hours at 85~95 DEG C and obtains the first colloid, by the first granulating from colloid, drying, powder It is broken to obtain S type volume expansion grain;
B) preparation of N-type volume expansion grain
(I) by weight raw material is weighed, deionized water is added in the second dissolution kettle, and sequentially add acrylamide, N-type Function monomer, 2-Hydroxy ethyl acrylate, methyl methacrylate, nonionic, inorganic matter and crosslinking agent stirring and dissolving, Obtain third mixed liquor;
(II) third mixed liquor pH value is adjusted to 5.5~6.5, controlled at 20~25 DEG C, is then added into reaction In kettle, the catalyst V50 of 0.5~1.5wt%, the potassium peroxydisulfate and 0.5 of 0.5~1.0wt% are sequentially added under nitrogen protection The sodium hydrogensulfite of~1.5wt%, and inflated with nitrogen mixing stops nitrogen blowing, obtains the until system becomes viscous into reaction kettle Four mixed liquors;
(III) the 4th mixed liquor is kept the temperature 5 hours at 85-95 DEG C and obtains the second colloid, by the second granulating from colloid, drying, powder It is broken to obtain N-type volume expansion grain;
C) class magnetism delays the preparation of swollen volume expansion grain
N-type volume expansion grain obtained in S type volume expansion grain obtained in step a), step b) is mixed in the ratio and is stirred It mixes 20 minutes, obtains the class magnetism and delay swollen volume expansion grain.
As the another embodiment of this case, wherein N-type volume expansion grain and S type volume expansion grain partial size are 60~150 mesh.
Specific embodiment is listed below:
Embodiment 1:
The synthesis of S type volume expansion grain: raw material is weighed by weight, wherein raw material proportioning are as follows: acrylamide monomer 10wt%, Sodium styrene sulfonate 3wt%, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate 10wt%, starch 10wt% are sliding Mountain flour 10wt%, N, N methylene acrylamide 0.5wt%, deionized water 46.5wt%.At room temperature, to equipped with agitating device Dissolution kettle in the deionized water measured in formula is added, be successively slowly added to acrylamide, sodium styrene sulfonate, third under stiring Olefin(e) acid -2- hydroxy methacrylate, methyl methacrylate, starch, talcum powder and N, N methylene acrylamide stirring sufficiently dissolution;It adjusts Whole lysate pH value is to 5.5;Lysate temperature is adjusted to 25 DEG C;Lysate is fully transferred in reaction kettle, into reaction kettle Nitrogen blowing 15 minutes in liquid;Catalyst V50 (1.0wt%), potassium peroxydisulfate are sequentially added under the protection of nitrogen (1.0wt%), sodium hydrogensulfite (1.5wt%);Catalyst continues nitrogen blowing mixing after adding until system becomes viscous stopping and blows Nitrogen, and reactor is closed, it is keeping the temperature under confined conditions after being warming up to 85 DEG C, then keep the temperature 5 hours;By what is polymerize Colloid is granulated, is dried, is ground into the finished product of 150 mesh particles, that is, has obtained S type volume expansion grain.
The synthesis of N-type volume expansion grain: raw material is weighed by weight, wherein raw material proportioning are as follows: acrylamide monomer 10wt%, N-type function monomer dimethyl diallyl ammonium chloride 5wt%, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate 10wt%, starch 10wt%, carbon fiber 10wt%, crosslinking agent 0.5wt%, deionized water 44.5wt%, at room temperature, to being equipped with The deionized water measured in formula is added in the dissolution kettle of agitating device, is successively slowly added to acrylamide, dimethyl under stiring Diallyl ammonium chloride, 2-Hydroxy ethyl acrylate, methyl methacrylate, starch, carbon fiber and N, N methylene acryloyl Amine stirring sufficiently dissolution;Lysate pH value is adjusted to 5.5;Lysate temperature is adjusted to 20 DEG C;Lysate is fully transferred to instead It answers in kettle, nitrogen blowing 15 minutes in liquid into reaction kettle;Sequentially added under the protection of nitrogen catalyst V50 (1.5wt%), Potassium peroxydisulfate (1.0wt%), sodium hydrogensulfite (1.5wt%);Catalyst continues nitrogen blowing mixing after adding until system becomes sticky Thick stopping nitrogen blowing, and reactor is closed, it is keeping the temperature under confined conditions after being warming up to 85 DEG C, then keep the temperature 5 hours;It will The colloid having polymerize is granulated, is dried, is ground into the finished product of 150 mesh particles.N-type volume expansion grain is obtained.
Class magnetism delays swollen volume expansion grain synthesis: by weight raw material is weighed, wherein raw material proportioning is S type volume expansion grain 50%, N-type volume expansion grain 50% delays swollen volume expansion grain in being mixed 20 minutes in feed bin to get to class magnetism, and number is TT990。
Embodiment 2:
The synthesis of S type volume expansion grain: raw material is weighed by weight, wherein raw material proportioning are as follows: acrylamide monomer 10wt%, Sodium styrene sulfonate 3wt%, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate 10wt%, starch 10wt% are sliding Mountain flour 10wt%, divinylbenzene 0.5wt%, deionized water 46.5wt%.At room temperature, to the dissolution kettle that agitating device is housed It is middle that the deionized water measured in formula is added, it is successively slowly added to acrylamide, sodium styrene sulfonate, acrylic acid -2- under stiring Hydroxy methacrylate, methyl methacrylate, starch, talcum powder and divinylbenzene stirring sufficiently dissolution;Adjust lysate pH value extremely 6;Lysate temperature is adjusted to 26 DEG C;Lysate is fully transferred in reaction kettle, into reaction kettle, nitrogen blowing 15 is divided in liquid Clock;Catalyst V50 (1.0wt%), potassium peroxydisulfate (1.0wt%), sodium hydrogensulfite are sequentially added under the protection of nitrogen (1.5wt%);Catalyst continues nitrogen blowing mixing after adding until system becomes viscous stopping nitrogen blowing, and reactor is closed, It is keeping the temperature under confined conditions after being warming up to 90 DEG C, then is keeping the temperature 5 hours;The colloid having polymerize is granulated, is dried, powder It is broken into the finished product of 150 mesh particles.S type volume expansion grain is obtained.
The synthesis of N-type volume expansion grain: raw material is weighed by weight, wherein raw material proportioning are as follows: acrylamide monomer 10wt%, Dimethyl diallyl ammonium chloride 5wt%, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate 10wt%, starch 10wt%, carbon fiber 10wt%, divinylbenzene 0.5wt%, deionized water 44.5wt%, at room temperature, to equipped with stirring dress The deionized water measured in formula is added in the dissolution kettle set, is successively slowly added to acrylamide, two allyl of dimethyl under stiring Ammonium chloride, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate, starch, carbon fiber and divinylbenzene stirring are filled Divide dissolution;Lysate pH value is adjusted to 6;Lysate temperature is adjusted to 22 DEG C;Lysate is fully transferred in reaction kettle, to anti- Answer in kettle nitrogen blowing 15 minutes in liquid;Catalyst V50 (1.5wt%), potassium peroxydisulfate are sequentially added under the protection of nitrogen (1.0wt%), sodium hydrogensulfite (1.5wt%);Catalyst continues nitrogen blowing mixing after adding until system becomes viscous stopping and blows Nitrogen, and reactor is closed, it is keeping the temperature under confined conditions after being warming up to 90 DEG C, then keep the temperature 5 hours;By what is polymerize Colloid is granulated, is dried, is ground into the finished product of 150 mesh particles.N-type volume expansion grain is obtained.
Class magnetism delays swollen volume expansion grain synthesis: by weight raw material is weighed, wherein raw material proportioning is S type volume expansion grain 25%, N-type volume expansion grain 75% delays swollen volume expansion grain in being mixed 20 minutes in feed bin to get to class magnetism, and number is TT991。
Embodiment 3:
The synthesis of S type volume expansion grain: raw material is weighed by weight, wherein raw material proportioning are as follows: acrylamide monomer 10wt%, Sodium styrene sulfonate 3wt%, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate 10wt%, starch 10wt% are sliding Mountain flour 10wt%, N, N methylene acrylamide 0.3wt%, divinylbenzene 0.2wt%, deionized water 46.5wt%.In room temperature Under, the deionized water measured in formula is added into the dissolution kettle equipped with agitating device, is successively slowly added to acryloyl under stiring Amine, sodium styrene sulfonate, 2-Hydroxy ethyl acrylate, methyl methacrylate, starch, talcum powder, N, N methylene acryloyl Amine and divinylbenzene stir sufficiently dissolution;Lysate pH value is adjusted to 5.5-6.5;Lysate temperature is adjusted to 27 DEG C;It will be molten Solution liquid is fully transferred in reaction kettle, nitrogen blowing 15 minutes in liquid into reaction kettle;It sequentially adds and urges under the protection of nitrogen Agent V50 (1.0wt%), potassium peroxydisulfate (1.0wt%), sodium hydrogensulfite (1.5wt%);Catalyst continues nitrogen blowing after adding Mixing becomes viscous stopping nitrogen blowing up to system, and reactor is closed, is keeping the temperature under confined conditions after being warming up to 95 DEG C, 5 hours are kept the temperature again;The colloid having polymerize is granulated to, is dried, is ground into the finished product of 150 mesh particles.S type body is obtained Swollen particle.
The synthesis of N-type volume expansion grain: raw material is weighed by weight, wherein raw material proportioning are as follows: acrylamide monomer 10wt%, Dimethyl diallyl ammonium chloride 5wt%, 2-Hydroxy ethyl acrylate 10wt%, methyl methacrylate 10wt%, starch 10wt%, carbon fiber 10wt%, N, N methylene acrylamide 0.3wt%, divinylbenzene 0.2wt%, deionized water 44.5wt% the deionized water measured in formula is added into the dissolution kettle equipped with agitating device, under stiring successively at room temperature Be slowly added to acrylamide, dimethyl diallyl ammonium chloride, 2-Hydroxy ethyl acrylate, methyl methacrylate, starch, Carbon fiber, N, N methylene acrylamide, divinylbenzene stir sufficiently dissolution;Lysate pH value is adjusted to 6.5;Adjustment dissolution Liquid temperature is to 25 DEG C;Lysate is fully transferred in reaction kettle, nitrogen blowing 15 minutes in liquid into reaction kettle;In nitrogen Catalyst V50 (1.5wt%), potassium peroxydisulfate (1.0wt%), sodium hydrogensulfite (1.5wt%) are sequentially added under protection;Catalyst Continue nitrogen blowing mixing after adding until system becomes viscous stopping nitrogen blowing, and it is reactor is closed, heat preservation under confined conditions Until after being warming up to 95 DEG C, then keep the temperature 5 hours;The colloid having polymerize is granulated, is dried, is ground into 150 mesh particles Finished product.N-type volume expansion grain is obtained.
Class magnetism delays swollen volume expansion grain synthesis: by weight raw material is weighed, wherein raw material proportioning is S type volume expansion grain 75%, N-type volume expansion grain 25% delays swollen volume expansion grain in being mixed 20 minutes in feed bin to get to class magnetism, and number is TT992。
The class magnetism of Example 1-3 delays swollen volume expansion grain, and it is as follows to carry out Experimental comparison's data with commercially available volume expansion grain:
Compared with prior art, class magnetism of the invention delays swollen volume expansion grain, and performance is superior to commercially available volume expansion grain.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited In specific details.

Claims (10)

1. a type magnetism delays swollen volume expansion grain, which is characterized in that 25~75wt% of S type volume expansion grain including 25~75wt% With the N-type volume expansion grain of 25~75wt%.
2. class magnetism according to claim 1 delays swollen volume expansion grain, which is characterized in that the S type volume expansion grain includes 10 ~15wt% acrylamide monomer, 3~5wt%S type function monomer, 5~10wt% 2-Hydroxy ethyl acrylate, 5~10wt% Methyl methacrylate, 5~10wt% nonionic, 3~10wt% inorganic matter, 0.1~0.5wt% crosslinking agent, 20~ 55wt% deionized water.
3. class magnetism according to claim 1 delays swollen volume expansion grain, which is characterized in that the N-type volume expansion grain includes 10 ~15wt% acrylamide monomer, 3~5wt%N type function monomer, 5~10wt% 2-Hydroxy ethyl acrylate, 5~10wt% Methyl methacrylate, 5~10wt% nonionic, 3~10wt% inorganic matter, 0.1~0.5wt% crosslinking agent, 20~ 55wt% deionized water.
4. class magnetism according to claim 2 delays swollen volume expansion grain, which is characterized in that the S type function monomer is selected from third Olefin(e) acid sodium, 2- acrylamide-2-methyl propane sulfonic sodium, n-vinyl pyrrolidone, sodium styrene sulfonate, in maleimide It is one or more.
5. class magnetism according to claim 3 delays swollen volume expansion grain, which is characterized in that the N-type function monomer is selected from first Base acrylyl oxy-ethyl-trimethyl salmiac, dimethyl diallyl ammonium chloride, one in acryloyloxytrimethylammonium ammonium chloride Kind is a variety of.
6. class magnetism according to claim 2 or 3 delays swollen volume expansion grain, which is characterized in that the nonionic is selected from One of guar gum, starch or combinations thereof.
7. class magnetism according to claim 2 or 3 delays swollen volume expansion grain, which is characterized in that the inorganic matter is selected from activity One of charcoal, carbon fiber, talcum powder are a variety of.
8. class magnetism according to claim 2 or 3 delays swollen volume expansion grain, which is characterized in that the crosslinking agent is selected from N, and N is sub- One of Methacrylamide, divinylbenzene or combinations thereof.
9. class magnetism described in one of claim 1~8 delays the preparation method of swollen volume expansion grain, which is characterized in that including following Step:
A) preparation of the S type volume expansion grain
(1) raw material is weighed by weight, deionized water is added in the first dissolution kettle, and sequentially add acrylamide, S type function Monomer, 2-Hydroxy ethyl acrylate, methyl methacrylate, nonionic, inorganic matter and crosslinking agent stirring and dissolving, obtain First mixed liquor;
(2) the first mixed liquor pH value is adjusted to 5.5~6.5, controlled at 25~27 DEG C, is then added into reaction kettle, Sequentially add under nitrogen protection the catalyst V50 of 0.1~1.0wt%, the potassium peroxydisulfate of 0.3~1.0wt% and 0.5~ The sodium hydrogensulfite of 1.5wt%, until system becomes viscous, it is mixed to obtain second for stopping nitrogen blowing for the inflated with nitrogen mixing into reaction kettle Close liquid;
(3) the second mixed liquor is kept the temperature 5 hours at 85~95 DEG C and obtains the first colloid, by the first granulating from colloid, drying, crushed To S type volume expansion grain;
B) preparation of the N-type volume expansion grain
(I) raw material is weighed by weight, deionized water is added in the second dissolution kettle, and sequentially add acrylamide, N-type function Monomer, 2-Hydroxy ethyl acrylate, methyl methacrylate, nonionic, inorganic matter and crosslinking agent stirring and dissolving, obtain Third mixed liquor;
(II) third mixed liquor pH value is adjusted to 5.5~6.5, controlled at 20~25 DEG C, is then added into reaction kettle, Sequentially add under nitrogen protection the catalyst V50 of 0.5~1.5wt%, the potassium peroxydisulfate of 0.5~1.0wt% and 0.5~ The sodium hydrogensulfite of 1.5wt%, and until system becomes viscous, stopping nitrogen blowing obtaining the 4th for inflated with nitrogen mixing into reaction kettle Mixed liquor;
(III) the 4th mixed liquor is kept the temperature 5 hours at 85-95 DEG C and obtains the second colloid, by the second granulating from colloid, drying, crushed To N-type volume expansion grain;
C) the class magnetism delays the preparation of swollen volume expansion grain
N-type volume expansion grain obtained in S type volume expansion grain obtained in step a), step b) is mixed 20 in the ratio Minute, it obtains the class magnetism and delays swollen volume expansion grain.
10. the preparation method that class magnetism according to claim 9 delays swollen volume expansion grain, which is characterized in that the N-type body is swollen Particle and S type volume expansion grain partial size are 60~150 mesh.
CN201910064192.5A 2019-01-23 2019-01-23 Magnetic-like slow-swelling expanded particles and preparation method thereof Expired - Fee Related CN109705830B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN111269705A (en) * 2020-04-03 2020-06-12 郑州工程技术学院 Temperature-resistant and salt-resistant profile control agent and preparation method thereof

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