CN103804593A - Synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer - Google Patents
Synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer Download PDFInfo
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- CN103804593A CN103804593A CN201210482884.XA CN201210482884A CN103804593A CN 103804593 A CN103804593 A CN 103804593A CN 201210482884 A CN201210482884 A CN 201210482884A CN 103804593 A CN103804593 A CN 103804593A
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- methyl acrylate
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Abstract
The invention discloses a synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer. The synthesis technology comprises steps of (a) firstly, respectively preparing certain concentration of maleic anhydride solution, crylic acid solution, ammonium persulfate solution and a certain amount of methyl acrylate according to certain proportion; (b) then adding the maleic anhydride solution into a vessel; (c) then starting a stirring and temperature rising device; (d) after achieving certain temperature, keeping the constant temperature, dripping initiator and monomer solution, after dripping, rapidly raising temperature up to certain value; (e) after stirring and reacting for a period at the constant temperature, stopping, cooling down naturally, so as to obtain the target product. The synthesis technology can be used for rapidly preparing the maleic anhydride-crylic acid-methyl acrylate copolymer, the preparation process is simple, the conversion rate of the preparation is high, and the preparation cost of the maleic anhydride-crylic acid-methyl acrylate copolymer is greatly lowered.
Description
Technical field
The present invention relates to a kind of synthesis technique of maleic acid anhydride-propenoic acid-methyl acrylate copolymer.
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, 800ml 2% 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.
Scale remover is made up of Multiple components, comprises the compositions such as organic complexing agent, tensio-active agent, scale inhibitor.Maleic acid anhydride-propenoic acid-methyl acrylate the terpolymer synthesizing as monomer take maleic anhydride (MA), vinylformic acid (AA), methyl acrylate (Mac) can be used as scale inhibitor and uses, and its anti-scaling property is good.
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 maleic acid anhydride-propenoic acid-methyl acrylate copolymer is provided, the method can be prepared maleic acid anhydride-propenoic acid-methyl acrylate copolymer fast, and preparation process is simple, prepare transformation efficiency high, greatly reduce the preparation cost of maleic acid anhydride-propenoic acid-methyl acrylate copolymer.
Object of the present invention is achieved through the following technical solutions: a kind of synthesis technique of maleic acid anhydride-propenoic acid-methyl acrylate copolymer, comprises step:
(a) prepare respectively first, according to a certain ratio certain density maleic anhydride solution, acrylic acid solution, ammonium persulfate solution and a certain amount of methyl acrylate;
(b) then, in container, add maleic anhydride solution;
(c) then start and stir and heat riser;
(d) constant temperature after temperature rises to certain value, drips initiator and monomer solution, dropwises the rear certain value that is warming up to rapidly;
(e) keep stopping after constant temperature stirring reaction for some time, naturally cooling, obtains target product.
Described container is the four-necked bottle with whipping appts, dropping funnel, thermometer and condensing works.
Described three dropping funnels are respectively charged into acrylic acid solution, methyl acrylate and ammonium persulfate solution.
Described initiator is ammonium persulfate solution.
Naturally cool to room temperature.
In sum, the invention has the beneficial effects as follows: can prepare fast maleic acid anhydride-propenoic acid-methyl acrylate copolymer, and preparation process is simple, prepares transformation efficiency high, greatly reduces the preparation cost of maleic acid anhydride-propenoic acid-methyl acrylate copolymer.
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 maleic acid anhydride-propenoic acid-methyl acrylate copolymer the present invention relates to, comprises step:
(a) prepare respectively first, according to a certain ratio certain density maleic anhydride solution, acrylic acid solution, ammonium persulfate solution and a certain amount of methyl acrylate;
(b) then, in container, add maleic anhydride solution;
(c) then start and stir and heat riser;
(d) constant temperature after temperature rises to certain value, drips initiator and monomer solution, dropwises the rear certain value that is warming up to rapidly;
(e) keep stopping after constant temperature stirring reaction for some time, naturally cooling, obtains target product.
Described container is the four-necked bottle with whipping appts, dropping funnel, thermometer and condensing works.
Described three dropping funnels are respectively charged into acrylic acid solution, methyl acrylate and ammonium persulfate solution.
Described initiator is ammonium persulfate solution.
Naturally cool to room temperature.
Can prepare fast maleic acid anhydride-propenoic acid-methyl acrylate copolymer by aforesaid method, and preparation process is simple, prepares transformation efficiency high, greatly reduces the preparation cost of maleic acid anhydride-propenoic acid-methyl acrylate copolymer.
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. a synthesis technique for maleic acid anhydride-propenoic acid-methyl acrylate copolymer, is characterized in that, comprises step:
(a) prepare respectively first, according to a certain ratio certain density maleic anhydride solution, acrylic acid solution, ammonium persulfate solution and a certain amount of methyl acrylate;
(b) then, in container, add maleic anhydride solution;
(c) then start and stir and heat riser;
(d) constant temperature after temperature rises to certain value, drips initiator and monomer solution, dropwises the rear certain value that is warming up to rapidly;
(e) keep stopping after constant temperature stirring reaction for some time, naturally cooling, obtains target product.
2. the synthesis technique of a kind of maleic acid anhydride-propenoic acid-methyl acrylate copolymer according to claim 1, is characterized in that, described container is the four-necked bottle with whipping appts, dropping funnel, thermometer and condensing works.
3. the synthesis technique of a kind of maleic acid anhydride-propenoic acid-methyl acrylate copolymer according to claim 2, is characterized in that, described three dropping funnels are respectively charged into acrylic acid solution, methyl acrylate and ammonium persulfate solution.
4. the synthesis technique of a kind of maleic acid anhydride-propenoic acid-methyl acrylate copolymer according to claim 1, is characterized in that, described initiator is ammonium persulfate solution.
5. the synthesis technique of a kind of maleic acid anhydride-propenoic acid-methyl acrylate copolymer according to claim 1, is characterized in that, naturally cools to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482884.XA CN103804593A (en) | 2012-11-13 | 2012-11-13 | Synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer |
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| CN201210482884.XA CN103804593A (en) | 2012-11-13 | 2012-11-13 | Synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105780023A (en) * | 2016-05-24 | 2016-07-20 | 山东泰和水处理科技股份有限公司 | Corrosion inhibitor used for pickling and synthetic method of corrosion inhibitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105780023A (en) * | 2016-05-24 | 2016-07-20 | 山东泰和水处理科技股份有限公司 | Corrosion inhibitor used for pickling and synthetic method of corrosion inhibitor |
| CN105780023B (en) * | 2016-05-24 | 2018-03-30 | 山东泰和水处理科技股份有限公司 | A kind of corrosion inhibiter and its synthetic method for pickling |
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Application publication date: 20140521 |