CN1099764A - Method for preparing maleic acid anhydride-propenoic acid copolymer - Google Patents
Method for preparing maleic acid anhydride-propenoic acid copolymer Download PDFInfo
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- CN1099764A CN1099764A CN 93112136 CN93112136A CN1099764A CN 1099764 A CN1099764 A CN 1099764A CN 93112136 CN93112136 CN 93112136 CN 93112136 A CN93112136 A CN 93112136A CN 1099764 A CN1099764 A CN 1099764A
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- Prior art keywords
- acrylic acid
- maleic anhydride
- hours
- propylene copolymer
- horse
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Abstract
This invention discloses a preparation method for maleic anhydride-acrylic acid copolymer of water treating agent. The said method is as follows: maleic anhydride is melted by heating, controlling a certain temp. and adding H2O2, while acrylic acid is added according to the proportion of acrylic acid and maleic anhydride mol ratio of 5-50:95-50 to proceed copolymerization so that a series of maleic anhydride-acrylic acid copolymer can be made up. This method has simple technology, no pollution, high productivity, low investment, and easy realization of industrialization.
Description
The invention relates to the preparation method of a kind of water conditioner copolymer of maleic anhydride and acrylic acid (horse-propylene copolymer).
Horse-propylene copolymer is a kind of scale-inhibiting dispersion agent for water treatment of excellence, zinc dirt and calcium sulfate dirt had very strong restraining effect, be specially adapted to zinc system prescription, but, limited the large-scale promotion application of horse-propylene copolymer because the production cost of general production method is too high.
At present, it is initiator that benzoyl peroxide is generally adopted in the preparation of horse-propylene copolymer, carries out the solution precipitation polymerization in organic solvent such as toluene, dimethylbenzene, and treated then being hydrolyzed again is horse-propylene copolymer.The used initiator of this method costs an arm and a leg, and consumption is big; Employed organic solvent is poisonous, and consumption is also big, and used solvent also must distill and reclaim usefulness again, complex process, and facility investment is big, causes production cost higher.Therefore, the investigator develops new preparation method in searching both at home and abroad, to reduce production costs.Existing water solution polymerization process prepares the report of horse-propylene copolymer, but only can make the horse-propylene copolymer of vinylformic acid mol ratio more than 50%.
It is simple to the objective of the invention is to seek a kind of technology, does not use deleterious organic solvent, and facility investment is little, and cost is low, and the vinylformic acid mol ratio accounts for the preparation method of horse-propylene copolymer of 5%～50%.
The objective of the invention is to realize by following method.
This law is controlled certain temperature at first with the maleic anhydride heat fused, adds by a certain percentage acrylic acid and initator H then under constantly stirring
2O
2Carry out combined polymerization, afterwards, the insulation reaction certain hour, thin up, cooling is De Ma-propylene copolymer product.
When preparing horse-propylene copolymer with said method, need the control reaction temperature, acrylic acid and H
2O
2Consumption, adding mode, insulation reaction time, amount of water etc.The present invention controls following technical qualification:
Temperature of reaction is controlled at 90-140 ℃.
The vinylformic acid consumption is controlled at vinylformic acid and the maleic anhydride mol ratio is 5～50: between 95～50.
Acrylic acid adding mode is dropping, about 5 hours dropping time.
Initator H
2O
2The adding mode for dripping, time for adding is about 5 hours.
Initator H
2O
2Consumption be that the 30-60%(of maleic anhydride and acrylic acid gross weight is with 30% H
2O
2Meter).
Insulation reaction was kept about 105 ℃ about 2 hours.
The density of horse-propylene copolymer product can be regulated by thin up, generally is controlled at 1.21-1.23g/cm
3(20 ℃) are advisable, and this moment, the product solid content was about 50%.
Advantages such as the present invention compares with existing horse-propylene copolymer preparation method, and it is simple to have production technique, pollution-free, and initiator is cheap and easy to get, and the production time is short, and whole process of preparation is finished in a still, and production cost is low.
Embodiment 1: add the 490g maleic anhydride in the 1L four-hole bottle, heating makes its fusing, is warmed up to 90～110 ℃, then the H of Dropwise 5 0g acrylic acid (accounting for 12.2% mole) and 300g30%
2O
2, dripped off in 5 hours, temperature is the highest in this process surpasses 140 ℃, then insulation 2 hours about 105 ℃ adds 360g water, lower the temperature 1100g horse-propylene copolymer product.
Embodiment 2: add the 490g maleic anhydride in the 1L four-hole bottle, heating makes its fusing, is warmed up to 90～110 ℃, drips then the H of 150g acrylic acid (accounting for 29.4% mole) and 270g30%
2O
2, dripped off in 5 hours, temperature is the highest in this process surpasses 140 ℃, then insulation 2 hours about 105 ℃ adds 510g water, lower the temperature 1300g horse-propylene copolymer product.
Embodiment 3: add the 200g maleic anhydride in the 1L four-hole bottle, heating makes its fusing, is warmed up to 90～110 ℃, drips then the H of 150g acrylic acid (accounting for 49.7% mole) and 110g30%
2O
2, dripped off in 5 hours, temperature is the highest in this process surpasses 140 ℃, then insulation 2 hours about 105 ℃ adds 250g water, lower the temperature 710g horse-propylene copolymer product.
The leading indicator of above-mentioned three embodiment gained horse-propylene copolymers is as follows:
| Index name | Index |
| Solids content, % mean molecule quantity (number average), 〉=bromine number, mg/g, ≤ pH value (1% aqueous solution) density, g/cm 3(20 ℃) | 50.0 ± 2.0 500 100.0 2.0-3.0 1.21-1.23 |
Claims (7)
1, a kind of method for preparing copolymer of maleic anhydride and acrylic acid (horse-propylene copolymer) is characterized in that at first the maleic anhydride heat fused is controlled certain temperature, is adding by a certain percentage acrylic acid and initator H then under constantly stirring
2O
2Carry out combined polymerization, afterwards, the insulation reaction certain hour, cooling is De Ma-propylene copolymer product.
2, the method for claim 1, temperature of reaction are controlled at 90-140 ℃.
3, the method for claim 1, vinylformic acid and maleic anhydride mol ratio are 5～50: 95～50.
4, such as claim 1,3 described methods, acrylic acid adding mode is for dripping, and time for adding is about 5 hours.
5, the method for claim 1, initator H
2O
2The adding mode for dripping, time for adding is about 5 hours.
6, such as claim 1,5 described methods, initator H
2O
2Consumption be that the 30-60%(of maleic anhydride and acrylic acid gross weight is with 30% H
2O
2Meter).
7, the method for claim 1, insulation reaction were kept about 105 ℃ about 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112136 CN1099764A (en) | 1993-08-30 | 1993-08-30 | Method for preparing maleic acid anhydride-propenoic acid copolymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112136 CN1099764A (en) | 1993-08-30 | 1993-08-30 | Method for preparing maleic acid anhydride-propenoic acid copolymer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1099764A true CN1099764A (en) | 1995-03-08 |
Family
ID=4989869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93112136 Pending CN1099764A (en) | 1993-08-30 | 1993-08-30 | Method for preparing maleic acid anhydride-propenoic acid copolymer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1099764A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352884C (en) * | 2004-09-24 | 2007-12-05 | 中国石油化工股份有限公司 | Oil well acidification composition |
| CN101538815B (en) * | 2008-03-17 | 2012-05-30 | 栗田工业株式会社 | Scale inhibitor in green liquor manufacturing system, inhibiting method and green liquor manufacturing system |
| CN102558421A (en) * | 2010-12-17 | 2012-07-11 | 中国石油天然气股份有限公司 | Preparation method of biodegradable multifunctional scale inhibitor |
| CN103314019A (en) * | 2010-12-17 | 2013-09-18 | 巴斯夫欧洲公司 | Stable polyacrylic acids, their manufacture and their use |
| CN105566553A (en) * | 2014-10-13 | 2016-05-11 | 上海东升新材料有限公司 | Maleic anhydride-acrylic acid copolymer for washing agent and preparation method thereof |
| CN109337006A (en) * | 2018-10-16 | 2019-02-15 | 南京林业大学 | A kind of acrylic acid-maleic anhydride copolymer pigment dispersing agent and its production method |
| CN109957063A (en) * | 2019-03-22 | 2019-07-02 | 泰兴市华盛银洋新材料科技有限公司 | A kind of acrylic acid ester emulsion and preparation method thereof with ultra-dispersed effect |
-
1993
- 1993-08-30 CN CN 93112136 patent/CN1099764A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352884C (en) * | 2004-09-24 | 2007-12-05 | 中国石油化工股份有限公司 | Oil well acidification composition |
| CN101538815B (en) * | 2008-03-17 | 2012-05-30 | 栗田工业株式会社 | Scale inhibitor in green liquor manufacturing system, inhibiting method and green liquor manufacturing system |
| CN102558421A (en) * | 2010-12-17 | 2012-07-11 | 中国石油天然气股份有限公司 | Preparation method of biodegradable multifunctional scale inhibitor |
| CN103314019A (en) * | 2010-12-17 | 2013-09-18 | 巴斯夫欧洲公司 | Stable polyacrylic acids, their manufacture and their use |
| CN102558421B (en) * | 2010-12-17 | 2013-10-16 | 中国石油天然气股份有限公司 | Preparation method of biodegradable multifunctional scale inhibitor |
| CN103314019B (en) * | 2010-12-17 | 2016-09-28 | 巴斯夫欧洲公司 | Stable polyacrylic acid, it prepares and application thereof |
| US10889661B2 (en) | 2010-12-17 | 2021-01-12 | Basf Se | Stable polyacrylic acids, their manufacture and their use |
| CN105566553A (en) * | 2014-10-13 | 2016-05-11 | 上海东升新材料有限公司 | Maleic anhydride-acrylic acid copolymer for washing agent and preparation method thereof |
| CN109337006A (en) * | 2018-10-16 | 2019-02-15 | 南京林业大学 | A kind of acrylic acid-maleic anhydride copolymer pigment dispersing agent and its production method |
| CN109957063A (en) * | 2019-03-22 | 2019-07-02 | 泰兴市华盛银洋新材料科技有限公司 | A kind of acrylic acid ester emulsion and preparation method thereof with ultra-dispersed effect |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |