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Method for preparing polymer of butene diacid

A technology of butenedioic acid and polymer, which is applied in the field of polymer preparation, can solve the problems of non-concentrated molecular weight distribution and low molecular weight, and achieve the effect of simplifying the process

Active Publication Date: 2008-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low molecular weight and non-concentrated molecular weight distribution of butenedioic acid polymers existing in the prior art, the present invention provides a butene compound using amidinoisopropylazo hydrochloride and hydrogen peroxide as initiators. Preparation method of diacid polymer

Method used

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  • Method for preparing polymer of butene diacid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Preparation of Butenedioic Acid Polymers

[0059] Polymerization takes place in the aqueous phase. The polymerization reactor is a four-necked flask equipped with a heating device, a condensation reflux device, a stirring device and a thermometer.

[0060] Add monomer, catalyst and water into the four-neck flask, after the solid material is completely dissolved, heat up to the reaction temperature, add the initiator dropwise to start the polymerization reaction, stop heating after a certain period of time, cool the reactant to normal temperature, and obtain the polymerization product.

[0061] The monomer is maleic anhydride, the catalyst is ferric ammonium sulfate, and the initiator is amidinoisopropyl azo hydrochloride and hydrogen peroxide.

[0062] The concentration of monomer in aqueous solution is 40% weight, and the concentration of catalyzer in aqueous solution is 200mg / L, and the add-on of initiator hydrochloric acid amidinoisopropyl azo is 1.0g / mol monomer, a...

Embodiment 2

[0074] The polymerization reactor and the polymerization process were the same as in Example 1.

[0075] The monomer of the polymerization reaction is maleic anhydride, the catalyst is ferric ammonium sulfate, the initiator is amidinoisopropyl azo hydrochloride and hydrogen peroxide.

[0076] The concentration of the monomer in the aqueous solution is 10% by weight, the concentration of the catalyst in the aqueous solution is 100mg / L, the addition of the initiator amidinoisopropyl azo hydrochloride is 0.1g / mol monomer, and the amount of the initiator hydrogen peroxide The addition amount is 9 g / mol monomer; the aqueous phase of the polymerization reaction also contains phosphorous acid, and its phosphorus content is 0.1% of the total weight of the monomer.

[0077] The adding method of the initiator is as follows: add amidinoisopropyl azo hydrochloride into aqueous hydrogen peroxide solution (concentration is 30% by weight), and after completely dissolving, add dropwise into t...

Embodiment 3

[0081] The polymerization reactor and the polymerization process were the same as in Example 1.

[0082] The monomer of the polymerization reaction is maleic anhydride, the catalyst is ferric ammonium sulfate, the initiator is amidinoisopropyl azo hydrochloride and hydrogen peroxide.

[0083] The concentration of the monomer in the aqueous solution is 60% by weight, the concentration of the catalyst in the aqueous solution is 500mg / L, the addition of the initiator amidinoisopropyl azo hydrochloride is 10g / mol monomer, the addition of the initiator hydrogen peroxide The amount is 60 g / mol monomer; the aqueous phase of the polymerization reaction also contains hypophosphorous acid whose phosphorus content is 10% of the total weight of the monomers.

[0084] The adding method of initiator is: at first amidinoisopropyl azo hydrochloride is added in the aqueous phase containing monomer and catalyst, after dissolving completely, hydrogen peroxide (concentration is 30% by weight) is ...

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Abstract

This invention relates to a preparation method for poly(butenedioic acid). Polymerization takes places in aqueous phase where there are monomers including one of several species of butenedioic acid and its derivatives, transition metal salts as catalysts and possibly hypophosphorous acid, phosphorous acid and their salts as well. It is initiated with the addition of guanyl isopropylazo hydrochloride and oxyol and the molecular weight of the polymers is over 800. Therefore, poly (butenedioic acid) with a high molecular weight can be prepared in this method and the common problems of low molecular weight and high molecular weight distribution that exist in current techniques can be effectively solved. And the consequent polymer product performs an active scale-inhibitory and corrosion-inhibitory effect and excellent properties of complex systems.

Description

technical field [0001] The invention relates to a method for preparing a polymer, in particular to a method for preparing a butenedioic acid polymer with a molecular weight greater than 800. Background technique [0002] Butenedioic acid polymers and their salts can be used as dispersants, scale inhibitors, cleaning additives, sequestrants, etc., among which the polymers with a molecular weight of 800-3000 are more effective. [0003] For example, hydrolyzed polymaleic anhydride (HPMA) with a molecular weight of 800-3000 is a better scale inhibitor for circulating cooling water and boiler water, and the higher the molecular weight, the better the effect. Corrosion agent) can be used in combination to achieve the purpose of scale and corrosion inhibition, and has a wide range of applications. [0004] The production of butenedioic acid polymers often adopts the aqueous phase method using water as the solvent and the non-aqueous phase method using benzene or toluene as the so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F22/06C08F2/16C08F4/04C08F4/32
Inventor 张英雄许树华羡广扬
Owner CHINA PETROLEUM & CHEM CORP
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