CN103803723A - Novel binary compound anti-scaling agent - Google Patents
Novel binary compound anti-scaling agent Download PDFInfo
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- CN103803723A CN103803723A CN201210484064.4A CN201210484064A CN103803723A CN 103803723 A CN103803723 A CN 103803723A CN 201210484064 A CN201210484064 A CN 201210484064A CN 103803723 A CN103803723 A CN 103803723A
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- acid
- methyl acrylate
- ethylenediamine tetraacetic
- scale
- polymaleic anhydride
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Abstract
The invention discloses a novel binary compound anti-scaling agent, which is prepared by mixing polymaleic anhydride-acrylic acid-methyl acrylate and ethylenediamine tetraacetic acid in the mass ratio of 4:5-7:5. The novel binary compound anti-scaling agent is prepared by mixing polymaleic anhydride-acrylic acid-methyl acrylate and ethylenediamine tetraacetic acid, is excellent in the scale-removing performance, is greatly superior to the conventional anti-scaling agent in the scale-removing rate when being applied to scale removal, and is low in manufacturing cost. The scale-removing cost is reduced greatly.
Description
Technical field
The present invention relates to the composite scale inhibitor of a kind of Novel Dual.
Background technology
Scale remover is a kind of incrustation scale of removing, and the chemicals of the multiple dirt stain such as dirt, generally forms by various ingredients is composite.Industrial scale remover is mainly used in removing heat-exchange equipment, the dirt in boiler etc.
The conventional kind of scale remover and feature thereof:
(1) inorganic polyphosphate.This type of is the scale remover using the earliest, has limited use abroad.In its molecule, there is the P-O-P key of one or more repetitions to exist, can be divided into chain poly-phosphate and cyclic polyphosphates.The shortcoming of inorganic polyphosphate is that moisture-sensitive hydrolysis generates orthophosphoric acid salt, under high temperature and high pH value, more so, reacts and fouling as Ca2+, Mg2+ etc. with divalent cation.
(2) organophosphate.The machine phosphoric acid ester of common are has monoalkyl phosphoric acid esters, bisalkyl phosphate, pyrophosphate, polyoxyethylene aliphatic ether phosphoric acid ester etc.In organophosphate, P-O-C key is stronger than phosphoric acid salt P-O-P key, and therefore it is than phosphate-stabilized, and hydrolysis temperature is higher than phosphoric acid salt.Seemingly, when use, consumption is unsuitable too high for the much character of phosphoric acid ester and phosphoric acid salt, the too high dirt that easily generates on the contrary.Phosphoric acid ester easily adheres to equipment surface, good with the consistency of inhibiter etc., but easily there is emulsification with oils, so need to add non-emulsifier while use in oil field, hydrolysis phenomenon that can be resemble inorganic polyphosphate in the time that temperature exceedes 90 ℃, its hydrolysate also can react and fouling with divalent metal.Strontium Sulphate white crystalline powder.Odorlessness.1g is dissolved in about 8800ml water, 700ml 3% nitric acid, 800ml2% hydrochloric acid, is slightly soluble in alkali chloride solution, concentrated acid, is insoluble to ethanol and dilute sulphuric acid.Relative density 3.96.1605 ℃ of fusing points.Refractive index 1.624.
(3) organic multicomponent phosphonic acids.C-P key in phosphonic acids is firm, therefore has higher chemical stability and thermostability, also difficult hydrolysis under high temperature, high pH value condition, nontoxic or low toxicity.For example ethylenediamine tetraacetic methene phosphoric acid still can keep its activity under the high temperature of 200 ℃ and 1013kPa; Carboxyl ethylene-diphosphonic acid just decomposes under the high temperature of 250 ℃.Such scale remover is effective, and dosing is little, and has corrosion inhibition concurrently.Be widely used in oil-field water processing.
(4) aminopolycanboxylic acid's salt.Aminopolycanboxylic acid's salt is a kind of scale remover of better heat stability, as the use temperature of EDTA can reach 200 ℃.This type of scale remover is mainly that the amount therefore adding is many by huge legendary turtle cooperation antiscale, and cost is high, so use and be restricted in the commercial run of a large amount of waters.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, provide a kind of Novel Dual composite scale inhibitor, the composite scale inhibitor of this Novel Dual is mixed by polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA), its scale removal is functional, descaling rate in the time being applied to scale removal is better than existing scale remover greatly, and low cost of manufacture, greatly reduces scale removal cost.
Object of the present invention is achieved through the following technical solutions: the composite scale inhibitor of a kind of Novel Dual, mixed by polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA), according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 4: 5～7: 5.According to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 4: 5.
According to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 5: 5.
According to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 6: 5.
According to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 7: 5.
In sum, the invention has the beneficial effects as follows: mixed by polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA), its scale removal is functional, and the descaling rate in the time being applied to scale removal is better than existing scale remover greatly, and low cost of manufacture, greatly reduces scale removal cost.
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 composite scale inhibitor of a kind of Novel Dual the present invention relates to, mixed by polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA), according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 4: 5～7: 5.
Take barium sulfate scale 0.5000g, get 50mg/L, 100ml ethylenediamine tetraacetic acid (EDTA) is in Erlenmeyer flask, add polymkeric substance, then drip the NaOH solution having prepared, regulate pH value to 12, it is 60 ℃ that water-bath regulates temperature, reacts 24 hours, and barium sulfate is carried out to scale removal experiment.Obtain experimental data, as shown in the table:
As can be seen from the above table:: in disodium EDTA, add polymaleic anhydride-vinylformic acid-methyl acrylate to have certain facilitation effect to removing barium sulfate scale.Experimental observation, barium sulfate scale particle has dispersion phenomenon, and solution is a little muddy, more difficult when suction filtration.Illustrate that polymaleic anhydride-vinylformic acid-methyl acrylate has participated in the dispersion of barium dirt particle.And optimum formula while having obtained polymaleic anhydride-vinylformic acid-methyl acrylate and disodium EDTA binary built, for filling a prescription 5 in table, m (polymaleic anhydride-vinylformic acid-methyl acrylate): m (ethylenediamine tetraacetic acid (EDTA)) is 5: 5.
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 (5)
1. the composite scale inhibitor of Novel Dual, it is characterized in that, mixed by polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA), according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 4: 5～7: 5.
2. the composite scale inhibitor of a kind of Novel Dual according to claim 1, is characterized in that, according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 4: 5.
3. the composite scale inhibitor of a kind of Novel Dual according to claim 2, is characterized in that, according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 5: 5.
4. the composite scale inhibitor of a kind of Novel Dual according to claim 1, is characterized in that, according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 6: 5.
5. the composite scale inhibitor of a kind of Novel Dual according to claim 1, is characterized in that, according to quality meter, the ratio of described polymaleic anhydride-vinylformic acid-methyl acrylate and ethylenediamine tetraacetic acid (EDTA) is 7: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210484064.4A CN103803723A (en) | 2012-11-13 | 2012-11-13 | Novel binary compound anti-scaling agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210484064.4A CN103803723A (en) | 2012-11-13 | 2012-11-13 | Novel binary compound anti-scaling agent |
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| CN103803723A true CN103803723A (en) | 2014-05-21 |
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| CN201210484064.4A Pending CN103803723A (en) | 2012-11-13 | 2012-11-13 | Novel binary compound anti-scaling agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925966A (en) * | 2015-07-06 | 2015-09-23 | 安徽省蓝天能源环保科技有限公司 | Scale and corrosion inhibitor for oil field system |
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2012
- 2012-11-13 CN CN201210484064.4A patent/CN103803723A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925966A (en) * | 2015-07-06 | 2015-09-23 | 安徽省蓝天能源环保科技有限公司 | Scale and corrosion inhibitor for oil field system |
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Application publication date: 20140521 |