CN103804576A - Monomer ratio control based synthesis process for chelated ternary copolymerization scale inhibitor - Google Patents
Monomer ratio control based synthesis process for chelated ternary copolymerization scale inhibitor Download PDFInfo
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- CN103804576A CN103804576A CN201210480408.4A CN201210480408A CN103804576A CN 103804576 A CN103804576 A CN 103804576A CN 201210480408 A CN201210480408 A CN 201210480408A CN 103804576 A CN103804576 A CN 103804576A
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Abstract
The invention discloses a monomer ratio control based synthesis process for a chelated ternary copolymerization scale inhibitor. The synthesis process comprises the steps: (a) placing a chelated group monomer, AM (Acrylamide) and AA (Acrylic Acid) into a reaction vessel according to a certain ratio, wherein the chelated group monomer accounts for 60-80% of the total weight, the AM accounts for 20-30% of the total weight, and the AA accounts for 3-7% of the total weight; (b) adding a solvent for dissolving; (c) adding a catalyst and an initiator; (d) placing all the components into the water bath, stirring at a certain speed, and reacting to obtain a reaction product mixture; (e) adding a proper amount of ethanol into the reaction product mixture, cooling, filtering, carrying out distillation separation on the filtered liquid, and then, drying to obtain the chelated ternary copolymerization scale inhibitor. By using the monomer ratio control based synthesis process, the chelated ternary copolymerization scale inhibitor can be successfully synthesized; the synthesized chelated ternary copolymerization scale inhibitor is favorable in performance, simple in synthesis step and low in synthesis cost; moreover, the reaction conversion ratio is increased through controlling the monomer ratio in the synthesis process.
Description
Technical field
The present invention relates to a kind of synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio.
Background technology
In oilfield exploitation procedure, fluid (oil, G&W) in hydrocarbon-bearing pool flows out from stratum, through pit shaft, well head to surface gathering system, due to the variation of the condition such as temperature, pressure and the thermodynamic phase of water and chemical incompatibility, cause oil gas water balance state to be destroyed.Often cause water filling stratum, tubing and casing, down-hole, uphole equipment and gathering system to occur fouling.Fouling has larger impact to the normal production of oil well, in the time that dirt deposition is on the equipment such as pit shaft, oil pipe, oil well pump, waterflood system, gathering system, heating system, can cause equipment not run well, heat transfer efficiency reduces, cause throughput to decline, and fouling also can cause the corrosion of equipment and pipeline, cause serious financial loss to oil field.
Existing scale inhibitor mainly contains aminopolycanboxylic acid's salt, organic multicomponent phosphonic acid based and organic polymer three major types.Aminopolycanboxylic acid's salt Chelate stability constants is large, can be used for comparatively high temps, but consumption is large, and cost is high; Organic multicomponent phosphonic acids to barium sulfate, Strontium Sulphate without antiscaling effect; And what mostly use is organic polymer scale inhibitor, uses monomer and maleic anhydride, acrylic acid copolymer to expect raising antiscaling rate more, but owing to fundamentally not changing polymer architecture, do not reach the antiscaling effect of expection.
In crude oil production process, fouling is a kind of ubiquitous phenomenon, and fouling is simultaneously one of the most serious problem running in the control of oil-field water water quality.Fouling has larger impact to the normal production of oil well, and dirt deposition can stop up formation pore, crack on stratum, cause permeability reduction, and crude production rate is declined, and even causes oil well to stop production when serious, and the oil reservoir lower on rate of permeation affects more very; In the time that dirt deposition is on the equipment such as pit shaft, oil pipe, oil well pump, waterflood system, gathering system, heating system, can cause equipment not run well, heat transfer efficiency reduces, cause throughput to decline, and fouling also can cause the corrosion of equipment and pipeline, cause serious financial loss to oil field.
The major cause of fouling is due to pressure or temperature change, evaporation or two kinds of water of 5 of mismatching mix mutually, make the inorganic salt (CaCO3, CaSO4 or BaSO4) that are originally present in the aqueous solution with ionic condition reach hypersaturated state, exceeded their solubleness and crystallize out into dirt.Fouling process is the process of certain density incrustation ion crystallization and gathering under certain physical and chemical condition (as pressure, temperature) and equipment surface situation.It is the basic reason that causes fouling that equilibrium state goes to pot.
Chemical scale inhibition agent is the gentle Technology of separating fouling of inhibition that oil field is commonly used the most.In order to prevent fouling, ground flow, oil well and water-injection plant need be connected or in system, add scale inhibitor off and on.For the various fouling situations in oil field, there are two class solutions: the one, scale removal; The 2nd, antiscale.Scale removal is a kind of remedial measures, and when scale removal, the corrosion that it has produced the underproduction and equipment, has caused larger financial loss, therefore, prevents that dirty generation is only a kind of good measure.In the method for antiscale, with chemical agent antiscale be people generally acknowledge the simplest, effectively, convenient, economic method.Therefore each oil field all adapts to the chemical scale inhibition agent of different condition for block the characteristic study separately.And develop the efficient scale inhibitor common objective that just generally pursue in each oil field especially.
In the synthesis process of chelating type terpolymer scale inhibitor, monomer ratio will directly have influence on reaction conversion ratio, therefore determine a suitable monomer ratio, the synthesis technique of chelating type terpolymer scale inhibitor be seemed to particularly important.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio is provided, this synthesis technique can successfully synthesize chelating type terpolymer scale inhibitor, and the excellent property of the chelating type terpolymer scale inhibitor synthesizing, synthesis step is simple, and synthetic cost is low; And by controlling the monomer ratio in building-up process, thereby improve reaction conversion ratio.
Object of the present invention is achieved through the following technical solutions: a kind of synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio, comprises the following steps:
(a) first, chelating group monomer, AM and AA are put into reaction vessel according to a certain percentage, and according to mass percent meter, described chelating group monomer accounts for 60%～80% of total amount, AM accounts for 20%～30% of total amount, and AA accounts for 3%～7% of total amount;
(b) then add dissolution with solvents;
(c) add catalyzer and initiator;
(d) will in reaction vessel, be placed in water-bath, stir with certain speed, reaction obtains mixture of reaction products;
(e) will in mixture of reaction products, add appropriate ethanol, and cold filtration processing, after liquid fractionation by distillation, then dry after filtering, obtain target product.
Described reaction vessel is beaker.
In described step (e), carry out filtration treatment by molecular sieve.
In described step (e), carry out underpressure distillation by rotatory evaporator.
According to mass percent meter, described chelating group monomer accounts for 65% of total amount, and AM accounts for 30% of total amount, and AA accounts for 5% of total amount.
According to mass percent meter, described chelating group monomer accounts for 75% of total amount, and AM accounts for 20% of total amount, and AA accounts for 5% of total amount.
According to mass percent meter, described chelating group monomer accounts for 70% of total amount, and AM accounts for 25% of total amount, and AA accounts for 5% of total amount.
In sum, the invention has the beneficial effects as follows: can successfully synthesize chelating type terpolymer scale inhibitor, and the excellent property of the chelating type terpolymer scale inhibitor synthesizing, synthesis step is simple, and synthetic cost is low; And by controlling the monomer ratio in building-up process, thereby improve reaction conversion ratio.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The synthesis technique of a kind of chelating type terpolymer scale inhibitor based on control monomer ratio the present invention relates to, comprises the following steps:
(a) first, chelating group monomer, AM and AA are put into reaction vessel according to a certain percentage, and according to mass percent meter, described chelating group monomer accounts for 60%～80% of total amount, AM accounts for 20%～30% of total amount, and AA accounts for 3%～7% of total amount;
(b) then add dissolution with solvents;
(c) add catalyzer and initiator;
(d) will in reaction vessel, be placed in water-bath, stir with certain speed, reaction obtains mixture of reaction products;
(e) will in mixture of reaction products, add appropriate ethanol, and cold filtration processing, after liquid fractionation by distillation, then dry after filtering, obtain target product.
Described reaction vessel is beaker.
In described step (e), carry out filtration treatment by molecular sieve.
In described step (e), carry out underpressure distillation by rotatory evaporator.
According to mass percent meter, described chelating group monomer accounts for 65% of total amount, and AM accounts for 30% of total amount, and AA accounts for 5% of total amount.
According to mass percent meter, described chelating group monomer accounts for 75% of total amount, and AM accounts for 20% of total amount, and AA accounts for 5% of total amount.
According to mass percent meter, described chelating group monomer accounts for 70% of total amount, and AM accounts for 25% of total amount, and AA accounts for 5% of total amount.
In the synthesis process of chelating type terpolymer scale inhibitor, monomer ratio will directly have influence on reaction conversion ratio, therefore determine a suitable monomer ratio, the synthesis technique of chelating type terpolymer scale inhibitor be seemed to particularly important.In order to obtain best monomer ratio, the present invention has done the impact experiment of different monomers proportioning on reaction conversion ratio, result is known by experiment: control suitable monomer ratio and be very helpful to improving reaction conversion ratio, in the present invention: according to mass percent meter, described chelating group monomer accounts for 60%～80% of total amount, AM accounts for 20%～30% of total amount, and AA accounts for 3%～7% of total amount.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (7)
1. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio, is characterized in that, comprises the following steps:
(a) first, chelating group monomer, AM and AA are put into reaction vessel according to a certain percentage, and according to mass percent meter, described chelating group monomer accounts for 60%～80% of total amount, AM accounts for 20%～30% of total amount, and AA accounts for 3%～7% of total amount;
(b) then add dissolution with solvents;
(c) add catalyzer and initiator;
(d) will in reaction vessel, be placed in water-bath, stir with certain speed, reaction obtains mixture of reaction products;
(e) will in mixture of reaction products, add appropriate ethanol, and cold filtration processing, after liquid fractionation by distillation, then dry after filtering, obtain target product.
2. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio according to claim 1, is characterized in that, described reaction vessel is beaker.
3. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio according to claim 1, is characterized in that, in described step (e), carries out filtration treatment by molecular sieve.
4. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio according to claim 1, is characterized in that, in described step (e), carries out underpressure distillation by rotatory evaporator.
5. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio according to claim 1, is characterized in that, according to mass percent meter, described chelating group monomer accounts for 65% of total amount, and AM accounts for 30% of total amount, and AA accounts for 5% of total amount.
6. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio according to claim 1, is characterized in that, according to mass percent meter, described chelating group monomer accounts for 75% of total amount, and AM accounts for 20% of total amount, and AA accounts for 5% of total amount.
7. the synthesis technique of the chelating type terpolymer scale inhibitor based on control monomer ratio according to claim 1, is characterized in that, according to mass percent meter, described chelating group monomer accounts for 70% of total amount, and AM accounts for 25% of total amount, and AA accounts for 5% of total amount.
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Application publication date: 20140521 |