CN103804577A - Process for synthesizing binary-copolymerized antiscaling agent - Google Patents
Process for synthesizing binary-copolymerized antiscaling agent Download PDFInfo
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- CN103804577A CN103804577A CN201210480804.7A CN201210480804A CN103804577A CN 103804577 A CN103804577 A CN 103804577A CN 201210480804 A CN201210480804 A CN 201210480804A CN 103804577 A CN103804577 A CN 103804577A
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- scale inhibitor
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Abstract
The invention discloses a process for synthesizing a binary-copolymerized antiscaling agent. The process comprises the steps: (a) firstly, preparing a chelating group monomer and acrylamide according to a certain proportion; (b) adding the chelating group monomer and acrylamide into a reaction vessel, then, adding a solvent to dissolve, and then, adding a catalyst; (c) stirring to thoroughly and uniformly mix; (d) placing the reaction vessel in a water bath, and reacting for a period of time at certain temperature, so as to obtain a reaction product mixture; (e) cooling the reaction product mixture, filtrating, carrying out reduced-pressure distillation on a filtrate, and separating, thereby obtaining a target product. According to the process, the binary-copolymerized antiscaling agent can be successfully synthesized, the properties of the synthesized binary-copolymerized antiscaling agent are excellent, the synthesizing steps are simple, and the synthesizing cost is low.
Description
Technical field
The present invention relates to a kind of synthesis technique of binary copolymerization scale inhibitor.
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 modal dirty type in oil field has calcite calcium carbonate (CaCO3), gypsum terra alba, anhydrite calcium sulfate (CaSO4), rock salt (NaCl), barite sulfate barium (BaSO4) and lazurite Strontium Sulphate (SrSO4).And the Strontium Sulphate of trace is often present in a large amount of barium sulfate, be difficult to them to separate.
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.
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.
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 binary copolymerization scale inhibitor is provided, and this synthesis technique can successfully synthesize binary copolymerization scale inhibitor, and the excellent property of the binary copolymerization scale inhibitor synthesizing, synthesis step is simple, and synthetic cost is low.
Object of the present invention is achieved through the following technical solutions: a kind of synthesis technique of binary copolymerization scale inhibitor, comprises the following steps:
(a) first, prepare according to a certain percentage chelating group monomer and acrylamide;
(b) chelating group monomer and acrylamide are joined in reaction vessel, then add after dissolution with solvents, add catalyzer;
(c) stir and allow it fully mix;
(d) be placed in water-bath, react at a certain temperature after for some time, obtain mixture of reaction products;
(e) mixture of reaction products is cooling, and make filtration treatment, after filtering, liquid pressure-reducing distillation, obtains target product after separation.
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.
In sum, the invention has the beneficial effects as follows: can successfully synthesize binary copolymerization scale inhibitor, and the excellent property of the binary copolymerization scale inhibitor synthesizing, synthesis step is simple, and synthetic cost is low.
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 binary copolymerization scale inhibitor the present invention relates to, comprises the following steps:
(a) first, prepare according to a certain percentage chelating group monomer and acrylamide;
(b) chelating group monomer and acrylamide are joined in reaction vessel, then add after dissolution with solvents, add catalyzer;
(c) stir and allow it fully mix;
(d) be placed in water-bath, react at a certain temperature after for some time, obtain mixture of reaction products;
(e) mixture of reaction products is cooling, and make filtration treatment, after filtering, liquid pressure-reducing distillation, obtains target product after separation.
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.
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 (4)
1. a synthesis technique for binary copolymerization scale inhibitor, is characterized in that, comprises the following steps:
(a) first, prepare according to a certain percentage chelating group monomer and acrylamide;
(b) chelating group monomer and acrylamide are joined in reaction vessel, then add after dissolution with solvents, add catalyzer;
(c) stir and allow it fully mix;
(d) be placed in water-bath, react at a certain temperature after for some time, obtain mixture of reaction products;
(e) mixture of reaction products is cooling, and make filtration treatment, after filtering, liquid pressure-reducing distillation, obtains target product after separation.
2. the synthesis technique of a kind of binary copolymerization scale inhibitor according to claim 1, is characterized in that, described reaction vessel is beaker.
3. the synthesis technique of a kind of binary copolymerization scale inhibitor according to claim 1, is characterized in that, in described step (e), carries out filtration treatment by molecular sieve.
4. the synthesis technique of a kind of binary copolymerization scale inhibitor according to claim 1, is characterized in that, in described step (e), carries out underpressure distillation by rotatory evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480804.7A CN103804577A (en) | 2012-11-13 | 2012-11-13 | Process for synthesizing binary-copolymerized antiscaling agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210480804.7A CN103804577A (en) | 2012-11-13 | 2012-11-13 | Process for synthesizing binary-copolymerized antiscaling agent |
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| CN103804577A true CN103804577A (en) | 2014-05-21 |
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| CN201210480804.7A Pending CN103804577A (en) | 2012-11-13 | 2012-11-13 | Process for synthesizing binary-copolymerized antiscaling agent |
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Application publication date: 20140521 |